ÊÃÃçÄ®ã®ÊÄ
:ŽƵƌŶĂůŽĨdŚƌĞĂƚĞŶĞĚdĂdžĂͮǁǁǁ͘ƚŚƌĞĂƚĞŶĞĚƚĂdžĂ͘ŽƌŐͮϮϲEŽǀĞŵďĞƌϮϬϭϯͮϱ;ϭϱͿ͗ϰϵϳϵʹϰϵϵϯ
Western Ghats
Special Series
&®Ý«ÝÊ¥Z®òÙ«Ùã«Öçþ«͕<Ù½͕/Ä®͗®òÙÝ®ãù͕
®ÝãÙ®çã®ÊÄ͕ã«ÙãÝÄÊÄÝÙòã®ÊÄ
/^^E
KŶůŝŶĞϬϵϳϰʹϳϵϬϳ
WƌŝŶƚϬϵϳϰʹϳϴϵϯ
KWE^^
͘ŝũƵŬƵŵĂƌϭ͕^ŝďLJWŚŝůŝƉϮ͕ŶǀĂƌůŝϯ͕^͘^ƵƐŚĂŵĂϰ& ZĂũĞĞǀZĂŐŚĂǀĂŶϱ
ϭ
ĞƉĂƌƚŵĞŶƚŽĨƋƵĂƟĐŝŽůŽŐLJĂŶĚ&ŝƐŚĞƌŝĞƐ͕hŶŝǀĞƌƐŝƚLJŽĨ<ĞƌĂůĂ͕dŚŝƌƵǀĂŶĂŶƚŚĂƉƵƌĂŵ͕<ĞƌĂůĂϲϵϱϱϴϭ͕/ŶĚŝĂ
ĞƉĂƌƚŵĞŶƚŽĨŽŽůŽŐLJ͕EŝƌŵĂůĂŐŝƌŝŽůůĞŐĞ͕<ŽŽƚŚƵƉĂƌĂŵďĂ͕<ĞƌĂůĂϲϳϬϳϬϭ͕/ŶĚŝĂ
Ϯ͕ϯ͕ϱ
ŽŶƐĞƌǀĂƟŽŶZĞƐĞĂƌĐŚ'ƌŽƵƉ;Z'Ϳ͕^ƚ͘ůďĞƌƚ͛ƐŽůůĞŐĞ͕<ŽĐŚŝ͕<ĞƌĂůĂϲϴϮϬϭϴ͕/ŶĚŝĂ
ϰ
ĞƉĂƌƚŵĞŶƚŽĨŽŽůŽŐLJ͕E͘^͘^͘ŽůůĞŐĞ͕KƩĂƉĂůĂŵ͕<ĞƌĂůĂϲϳϵϭϬϯ͕/ŶĚŝĂ
ϱ
ŽŽKƵƚƌĞĂĐŚKƌŐĂŶŝnjĂƟŽŶ;KKͿ͕ϵϲ͕<ƵŵƵĚŚĂŵEĂŐĂƌ͕sŝůĂŶŬƵƌŝĐŚŝZŽĂĚ͕ŽŝŵďĂƚŽƌĞ͕dĂŵŝůEĂĚƵϲϰϭϬϯϱ͕/ŶĚŝĂ
ϭ
ĂďŝũƵΛƌĞĚŝīŵĂŝů͘ĐŽŵ͕ϮƐŝďLJΛĐŽŶƐĞƌǀĂƟŽŶƌĞƐĞĂƌĐŚŐƌŽƵƉ͘ŽƌŐ͕ϯĂŶǀĂƌĂůŝŝĨΛŐŵĂŝů͘ĐŽŵ͕ϰƐƵŵĂŬƌŝƐŚŶĂŶϯΛLJĂŚŽŽ͘ĐŽŵ͕
ϱ
ƌĂũĞĞǀƌĂƋΛŚŽƚŵĂŝů͘ĐŽŵ;ĐŽƌƌĞƐƉŽŶĚŝŶŐĂƵƚŚŽƌͿ
Ϯ
ďƐƚƌĂĐƚ͗tĞƉƌĞƐĞŶƚŚĞƌĞĂĐŽŵƉƌĞŚĞŶƐŝǀĞĂĐĐŽƵŶƚŽĨƚŚĞĚŝǀĞƌƐŝƚLJ͕ĚŝƐƚƌŝďƵƟŽŶ͕ƚŚƌĞĂƚƐ͕ĂŶĚƐƵŐŐĞƐƚĐŽŶƐĞƌǀĂƟŽŶŵĞĂƐƵƌĞƐĨŽƌƚŚĞ
ĮƐŚĞƐŽĨŚĂƌĂƚŚĂƉƵnjŚĂ͕ƚŚĞůĂƌŐĞƐƚǁĞƐƚŇŽǁŝŶŐƌŝǀĞƌŝŶƚŚĞƐŽƵƚŚĞƌŶ/ŶĚŝĂŶƐƚĂƚĞŽĨ<ĞƌĂůĂ͘ƚŽƚĂůŽĨϭϭϳƐƉĞĐŝĞƐƵŶĚĞƌϰϯĨĂŵŝůŝĞƐĂŶĚ
ϴϭŐĞŶĞƌĂǁĞƌĞƌĞĐŽƌĚĞĚĨƌŽŵƚŚĞƌŝǀĞƌ͕ŽĨǁŚŝĐŚϵϴǁĞƌĞƉƌŝŵĂƌLJĨƌĞƐŚǁĂƚĞƌĂŶĚϭϵǁĞƌĞƐĞĐŽŶĚĂƌLJĨƌĞƐŚǁĂƚĞƌĂŶĚͬŽƌĚŝĂĚƌŽŵŽƵƐ
ƐƉĞĐŝĞƐ͘^ŝdžƐƉĞĐŝĞƐŽĨŶŽŶͲŶĂƟǀĞĮƐŚǁĞƌĞĂůƐŽƌĞĐŽƌĚĞĚ͕ŽĨǁŚŝĐŚƚŚƌĞĞǁĞƌĞĞdžŽƟĐƚŽƚŚĞĐŽƵŶƚƌLJĂŶĚƚŚƌĞĞǁĞƌĞƚƌĂŶƐƉůĂŶƚĞĚĨƌŽŵƚŚĞ
ŐĂŶŐĞƟĐƉůĂŝŶƐ͘dǁĞŶƚLJͲĞŝŐŚƚƉĞƌĐĞŶƚ;^сϯϯͿŽĨƐƉĞĐŝĞƐƚŚĂƚŽĐĐƵƌŝŶƚŚĞŚĂƌĂƚŚĂƉƵnjŚĂĂƌĞĞŶĚĞŵŝĐƚŽƚŚĞtĞƐƚĞƌŶ'ŚĂƚƐ͕ǁŚŝůĞƚŚƌĞĞ
ƐƉĞĐŝĞƐ;Balitora jalpalli͕Mesonoemacheilus remadeviiĂŶĚPseudolaguvia austrinaͿĂƌĞƌĞƐƚƌŝĐƚĞĚŝŶƚŚĞŝƌĚŝƐƚƌŝďƵƟŽŶƚŽƚŚĞƌŝǀĞƌƐLJƐƚĞŵ͘
ůŝƩůĞŵŽƌĞƚŚĂŶŽŶĞͲƚĞŶƚŚ;ϭϭй͖^сϭϯͿŽĨƐƉĞĐŝĞƐƚŚĂƚŽĐĐƵƌŝŶƚŚĞƌŝǀĞƌĂƌĞůŝƐƚĞĚƵŶĚĞƌǀĂƌŝŽƵƐƚŚƌĞĂƚĞŶĞĚĐĂƚĞŐŽƌŝĞƐŽŶƚŚĞ/hE
ZĞĚ>ŝƐƚ͘ƐƉĂƌƚŽĨƚŚŝƐƐƚƵĚLJ͕ǁĞĂůƐŽĞdžƚĞŶĚƚŚĞĚŝƐƚƌŝďƵƟŽŶƌĂŶŐĞŽĨOsteochilichthys longidorsalisƚŽƚŚĞŚĂƌĂƚŚĂƉƵnjŚĂZŝǀĞƌƐLJƐƚĞŵ͕
ďĂƐĞĚ ŽŶ ŝƚƐ ĐŽůůĞĐƟŽŶ ĨƌŽŵ ƚŚĞ dŚŽŽƚŚĂƉƵnjŚĂ ƚƌŝďƵƚĂƌLJ͘ ^ĞǀĞƌĂů ĂŶƚŚƌŽƉŽŐĞŶŝĐ ƐƚƌĞƐƐŽƌƐ ŝŶĐůƵĚŝŶŐ ĚĞĨŽƌĞƐƚĂƟŽŶ ĂŶĚ ůŽƐƐ ŽĨ ƌŝƉĂƌŝĂŶ
ĐŽǀĞƌ͕ĚĂŵƐĂŶĚŽƚŚĞƌŝŵƉŽƵŶĚŵĞŶƚƐ͕ƉŽůůƵƟŽŶ͕ƐĂŶĚŵŝŶŝŶŐ͕ŶŽŶͲŶĂƟǀĞƐƉĞĐŝĞƐĂŶĚĚĞƐƚƌƵĐƟǀĞĮƐŚŝŶŐƉƌĂĐƟĐĞƐĂƌĞƚŚƌĞĂƚĞŶŝŶŐƚŚĞ
ƌŝĐŚŝĐŚƚŚLJŽĨĂƵŶĂůĚŝǀĞƌƐŝƚLJĂŶĚĞŶĚĞŵŝƐŵŝŶƚŚĞŚĂƌĂƚŚĂƉƵnjŚĂ͘dŚĞƌĞŝƐŚĞŶĐĞĂŶƵƌŐĞŶƚŶĞĞĚƚŽĚĞǀĞůŽƉĂŶĚŝŵƉůĞŵĞŶƚĐŽŶƐĞƌǀĂƟŽŶ
ƉůĂŶƐ͕ƐŽŵĞŽĨǁŚŝĐŚĂƌĞĚŝƐĐƵƐƐĞĚ͘
<ĞLJǁŽƌĚƐ͗Osteochilichthys longidorsalis͕EŝůĂ͕ƌŝǀĞƌĐŽŶƐĞƌǀĂƟŽŶ͕^ŝůĞŶƚsĂůůĞLJEĂƟŽŶĂůWĂƌŬ͕tĞƐƚĞƌŶ'ŚĂƚƐ͘
K/͗ŚƩƉ͗ͬͬĚdž͘ĚŽŝ͘ŽƌŐͬϭϬ͘ϭϭϲϬϵͬ:Ždd͘ŽϯϲϰϬ͘ϰϵϳϵͲϵϯͮŽŽĂŶŬ͗ƵƌŶ͗ůƐŝĚ͗njŽŽďĂŶŬ͘ŽƌŐ͗ƉƵď͗ϳϮϰϯϵϳϯͲϯϬϬͲϰϲ&ͲϵϮͲ&ϰϭϵϯϴϰϮ
ĚŝƚŽƌ͗ŶŽŶLJŵŝƚLJƌĞƋƵĞƐƚĞĚ͘
ĂƚĞŽĨƉƵďůŝĐĂƟŽŶ͗ϮϲEŽǀĞŵďĞƌϮϬϭϯ;ŽŶůŝŶĞΘƉƌŝŶƚͿ
DĂŶƵƐĐƌŝƉƚĚĞƚĂŝůƐ͗DƐηŽϯϲϰϬͮZĞĐĞŝǀĞĚϮϲDĂLJϮϬϭϯͮ&ŝŶĂůƌĞĐĞŝǀĞĚϬϴEŽǀĞŵďĞƌϮϬϭϯͮ&ŝŶĂůůLJĂĐĐĞƉƚĞĚϭϬEŽǀĞŵďĞƌϮϬϭϯ
ŝƚĂƟŽŶ͗ ŝũƵŬƵŵĂƌ͕͕͘^͘WŚŝůŝƉ͕͘ůŝ͕^͘^ƵƐŚĂŵĂΘZ͘ZĂŐŚĂǀĂŶ;ϮϬϭϯͿ͘&ŝƐŚĞƐŽĨZŝǀĞƌŚĂƌĂƚŚĂƉƵnjŚĂ͕<ĞƌĂůĂ͕/ŶĚŝĂ͗ĚŝǀĞƌƐŝƚLJ͕ĚŝƐƚƌŝďƵƟŽŶ͕ƚŚƌĞĂƚƐĂŶĚĐŽŶƐĞƌǀĂͲ
ƟŽŶ͘Journal of Threatened Taxaϱ;ϭϱͿ͗ϰϵϳϵʹϰϵϵϯ; ŚƩƉ͗ͬͬĚdž͘ĚŽŝ͘ŽƌŐͬϭϬ͘ϭϭϲϬϵͬ:Ždd͘ŽϯϲϰϬ͘ϰϵϳϵͲϵϯ
ŽƉLJƌŝŐŚƚ͗ ©ŝũƵŬƵŵĂƌĞƚĂů͘ ϮϬϭϯ͘ƌĞĂƟǀĞŽŵŵŽŶƐƩƌŝďƵƟŽŶϯ͘ϬhŶƉŽƌƚĞĚ>ŝĐĞŶƐĞ͘:ŽddĂůůŽǁƐƵŶƌĞƐƚƌŝĐƚĞĚƵƐĞŽĨƚŚŝƐĂƌƟĐůĞŝŶĂŶLJŵĞĚŝƵŵ͕ƌĞƉƌŽĚƵĐƟŽŶ
ĂŶĚĚŝƐƚƌŝďƵƟŽŶďLJƉƌŽǀŝĚŝŶŐĂĚĞƋƵĂƚĞĐƌĞĚŝƚƚŽƚŚĞĂƵƚŚŽƌƐĂŶĚƚŚĞƐŽƵƌĐĞŽĨƉƵďůŝĐĂƟŽŶ͘
&ƵŶĚŝŶŐ͗͘ŝũƵŬƵŵĂƌƚŚĂŶŬƐƚŚĞĞƉĂƌƚŵĞŶƚŽĨ^ĐŝĞŶĐĞ͕ŶŐŝŶĞĞƌŝŶŐĂŶĚZĞƐĞĂƌĐŚŽƵŶĐŝů;^ZͿ͕'ŽǀƚŽĨ/ŶĚŝĂ;EŽ͘^Zͬ&dͬ>ͲϮϭͬϮϬϬϯͿĂŶĚƚŚĞhŶŝǀĞƌƐŝƚLJ'ƌĂŶƚƐ
ŽŵŵŝƐƐŝŽŶ;h'Ϳ;EŽ͘&͘ϭ͘ϭϱͬϵϳ;D/EKZͬ^ZKͿĨŽƌĮŶĂŶĐŝĂůĂƐƐŝƐƚĂŶĐĞ͘ZĂũĞĞǀZĂŐŚĂǀĂŶƚŚĂŶŬƐƚŚĞƌŝƟĐĂůĐŽƐLJƐƚĞŵWĂƌƚŶĞƌƐŚŝƉ&ƵŶĚ;W&ͿͲtĞƐƚĞƌŶ'ŚĂƚƐ
WƌŽŐƌĂŵƚŚƌŽƵŐŚƚŚĞƐŚŽŬĂdƌƵƐƚĨŽƌZĞƐĞĂƌĐŚŝŶĐŽůŽŐLJĂŶĚŶǀŝƌŽŶŵĞŶƚ;dZͿ͕ĂŶŐĂůƵƌƵ͕/ŶĚŝĂĨŽƌĨƵŶĚŝŶŐ͘
ŽŵƉĞƟŶŐ/ŶƚĞƌĞƐƚ͗dŚĞĂƵƚŚŽƌƐĚĞĐůĂƌĞŶŽĐŽŵƉĞƟŶŐŝŶƚĞƌĞƐƚƐ͘&ƵŶĚŝŶŐƐŽƵƌĐĞƐŚĂĚŶŽƌŽůĞŝŶƐƚƵĚLJĚĞƐŝŐŶ͕ĚĂƚĂĐŽůůĞĐƟŽŶ͕ƌĞƐƵůƚƐŝŶƚĞƌƉƌĞƚĂƟŽŶĂŶĚŵĂŶƵͲ
ƐĐƌŝƉƚǁƌŝƟŶŐ͘
ƵƚŚŽƌĐŽŶƚƌŝďƵƟŽŶƐ͕͗^W͕͕^^ΘZZĐĂƌƌŝĞĚŽƵƚƚŚĞĮĞůĚƐƵƌǀĞLJƐ͖ĂŶĚZZĂŶĂůLJnjĞĚĂŶĚŝŶƚĞƌƉƌĞƚĞĚƚŚĞĚĂƚĂ͖͕^WΘZZǁƌŽƚĞƚŚĞŵĂŶƵƐĐƌŝƉƚ͘
ƵƚŚŽƌĞƚĂŝůƐ͗^ĞĞĞŶĚŽĨƚŚŝƐĂƌƟĐůĞ͘
ĐŬŶŽǁůĞĚŐĞŵĞŶƚƐ͗&ŝĞůĚǁŽƌŬďĞŶĞĮƩĞĚĨƌŽŵƚŚĞŚĞůƉĂŶĚƐƵƉƉŽƌƚŽĨ:ŽƐŝŶdŚĂƌŝĂŶ͕&ŝďŝŶĂďLJ͕ĞŶŶŽWĞƌĞŝƌĂ͕<͘<ƌŝƐŚŶĂŬƵŵĂƌ͕D͘Z͘ZĂŵƉƌĂƐĂŶƚŚ͕^ĂŶũĂLJ
DŽůƵƌ ĂŶĚ EŝďŚĂ EĂŵĚŝƌŝ͘ &ŝĞůĚ ǁŽƌŬ ŝŶ ƚŚĞ ^ŝůĞŶƚ sĂůůĞLJ EĂƟŽŶĂů WĂƌŬ ǁĂƐ ĐŽŶĚƵĐƚĞĚ ǁŝƚŚ ŽĸĐŝĂů ƉĞƌŵŝƚƐ ĨƌŽŵ ƚŚĞ <ĞƌĂůĂ ^ƚĂƚĞ &ŽƌĞƐƚ ĂŶĚ tŝůĚůŝĨĞ
ĞƉĂƌƚŵĞŶƚƚŽ͘ŝũƵŬƵŵĂƌ;t>ϭϮͲϯϰϮϯͬϮϬϬϰͿĂŶĚZĂũĞĞǀZĂŐŚĂǀĂŶ;t>ϭϮͲϴϱϱϬͬϮϬϬϵͿ͘dŚĞĂƵƚŚŽƌƐƚŚĂŶŬƚǁŽĂŶŽŶLJŵŽƵƐƌĞǀŝĞǁĞƌƐĂŶĚƚŚĞƐƵďũĞĐƚĞĚŝƚŽƌĨŽƌ
ƚŚĞŝƌĐŽŶƐƚƌƵĐƟǀĞĐŽŵŵĞŶƚƐĂŶĚƐƵŐŐĞƐƟŽŶƐƚŚĂƚŐƌĞĂƚůLJŝŵƉƌŽǀĞĚƚŚĞŵĂŶƵƐĐƌŝƉƚ͘
dŚŝƐĂƌƟĐůĞĨŽƌŵƐƉĂƌƚŽĨĂƐƉĞĐŝĂůƐĞƌŝĞƐŽŶƚŚĞtĞƐƚĞƌŶ'ŚĂƚƐŽĨ/ŶĚŝĂ͕ĚŝƐƐĞŵŝŶĂƟŶŐƚŚĞƌĞƐƵůƚƐŽĨǁŽƌŬƐƵƉƉŽƌƚĞĚďLJƚŚĞƌŝƟĐĂůĐŽƐLJƐƚĞŵWĂƌƚŶĞƌƐŚŝƉ&ƵŶĚ
;W&Ϳ͕ĂũŽŝŶƚŝŶŝƟĂƟǀĞŽĨů͛ŐĞŶĐĞ&ƌĂŶĕĂŝƐĞĚĞĠǀĞůŽƉƉĞŵĞŶƚ͕ŽŶƐĞƌǀĂƟŽŶ/ŶƚĞƌŶĂƟŽŶĂů͕ƚŚĞƵƌŽƉĞĂŶŽŵŵŝƐƐŝŽŶ͕ƚŚĞ'ůŽďĂůŶǀŝƌŽŶŵĞŶƚ&ĂĐŝůŝƚLJ͕ƚŚĞ'ŽǀͲ
ĞƌŶŵĞŶƚŽĨ:ĂƉĂŶ͕ƚŚĞDĂĐƌƚŚƵƌ&ŽƵŶĚĂƟŽŶĂŶĚƚŚĞtŽƌůĚĂŶŬ͘ĨƵŶĚĂŵĞŶƚĂůŐŽĂůŽĨW&ŝƐƚŽĞŶƐƵƌĞĐŝǀŝůƐŽĐŝĞƚLJŝƐĞŶŐĂŐĞĚŝŶďŝŽĚŝǀĞƌƐŝƚLJĐŽŶƐĞƌǀĂƟŽŶ͘
/ŵƉůĞŵĞŶƚĂƟŽŶŽĨƚŚĞW&ŝŶǀĞƐƚŵĞŶƚƉƌŽŐƌĂŵŝŶƚŚĞtĞƐƚĞƌŶ'ŚĂƚƐŝƐůĞĚĂŶĚĐŽŽƌĚŝŶĂƚĞĚďLJƚŚĞƐŚŽŬĂdƌƵƐƚĨŽƌZĞƐĞĂƌĐŚŝŶĐŽůŽŐLJĂŶĚƚŚĞŶǀŝƌŽŶŵĞŶƚ
;dZͿ͘
ϰϵϳϵ
Fishes of Bharathapuzha River
Bijukumar et al.
INTRODUCTION
Information on diversity and distribution of species
is crucial for appropriate and timely decision making in
biodiversity conservation. Collation and dissemination
of such information is especially important for poorly
known yet threatened taxa such as freshwater fish, and
for critical biodiversity areas such as ‘Hotspots’. The
Western Ghats part of the Western Ghats - Sri Lanka
Biodiversity Hotspot in peninsular India is an exceptional
region of freshwater biodiversity (Dahanukar et al.
2011), where in spite of more than 200 years of research
the ichthyofauna continues to be influenced by both
the Linnaean and Wallacean shortfall (Dahanukar et al.
2011; Raghavan 2011). Although there are hundreds
of papers including checklists on freshwater fishes of
Kerala, in both peer-reviewed and gray literature, few
provide data that can be validated. Most checklists from
this region are not supported by voucher specimens,
photographs and/or taxonomic notes and are mere
compilations of secondary information from some of the
earlier ‘dated’ papers/checklists.
The Bharathapuzha River, also known as ‘Nila’ and
‘Perar’, originates from the northern and southern tips
of the Palakkad gap in the Western Ghats, as well as from
the gap. The minor tributaries join together to form
four major tributaries: Gayathripuzha, Chitturpuzha,
Kalpathipuzha, and Thoothapuzha (Image 1). It is the
second longest (209km) and largest (annual discharge of
3.94km3) among the west flowing perennial rivers in the
state of Kerala (Raj & Azeez 2012), as well as the river
with the most extensive basin area, second in length
and third in yield by thousand million cubic feet (TMCF;
Anon 1998). The Bharathapuzha watershed lies between
10025’–11015’N and 75050’–76055’E, and is located in the
Palakkad, Thrissur and Malappuram districts of Kerala
State. Bharathapuzha has a total basin area of 6,186km2,
of which 4,400km2 is in Kerala and the remaining in Tamil
Nadu (Raj & Azeez 2012).
The earliest ichthyological investigations in the
Bharathapuzha drainage (then Ponnani drainage of
erstwhile Malabar state in India) were carried out by
Jerdon (1849) and Day (1865). This was followed by
the works of Herre (1942, 1945), Silas (1951, 1958)
and subsequently Indra & Devi (1981), Devi & Indra
(1984; 1986), Easa & Basha (1995), Easa & Shaji (1997),
Bijukumar & Sushama (2001), Shaji (2002), Kurup et al.
(2004), Sushama et al. (2004) and Devi et al. (2005).
However, most of these studies were restricted to one or
a few regions and/or tributaries of the Bharathapuzha,
and a comprehensive study has not yet been realized.
4980
Here, we provide a comprehensive and consolidated
checklist of fishes of the Bharathapuzha River system
(backed by voucher specimens) and discuss their
distribution, threats and conservation. We also report
on the extension of range of an endemic cyprinid,
Osteochilichthys longidorsalis Pethiyagoda & Kottelat
1994, and a new site record for Pseudolaguvia austrina
Radhakrishnan, Kumar & Ng 2010, in the Bharathapuzha
River system.
MATERIALS AND METHODS
Study area
Bharathapuzha has four major tributaries,
Gayathripuzha, Chitturpuzha (Kannadipuzha or
Amaravathipuzha), Kalpathipuzha and Thoothapuzha
(Image 1). From the confluence of Kalpathipuzha and
Chitturpuzha at Parali, the river acquires the name
‘Bharathapuzha’. The flow regime of the river includes
highlands (>76m), midlands (76–8 m) and lowlands
(<8m) (Raj & Azeez 2009). A series of large dams have
been constructed across the Bharathapuzha River
and its tributaries; two dams are located in Tamil
Nadu (Thirumoorthy and Aliyar) and seven in Kerala
(Kanjirapuzha, Malampuzha, Walayar, Meenkara,
Chulliar, Pothundy and Mangalam). Further, there
are two major diversion schemes, Moolathara and
Cheerakkuzhy, in addition to a Thrithala-Velliyamkallu
regulator-cum-bridge. A series of check dams are built
across the lower reaches of Bharathapuzha in order to
retain water temporarily.
The Reserved Forest area in the Bharathapuzha
Basin in Kerala is around 625km2, while it is 800km2
including forest vegetation in Tamil Nadu (Image 2).
While Chitturpuzha watershed has forest cover in the
Anamalai hills of Tamil Nadu State (Aliyar tributary),
the forest patches in Kalpathipuzha, Gayathripuzha and
Thoothapuzha are represented by 177km2, 196km2,
and 252km2 of forest areas respectively in the State of
Kerala. The Bharathapuzha and its tributaries also drain
three important protected areas, the Indira Gandhi Tiger
Reserve, the Parambikulam Tiger Reserve, and the Silent
Valley National Park, apart from many areas declared as
reserved forests.
Sampling sites and methods
As part of the present study, surveys were carried
out in all the four tributaries, viz., Gayathripuzha,
Chitturpuzha,
Kalpathipuzha
(Image
3)
and
Thoothapuzha (Image 4) of the Bharathapuzha River and
Journal of Threatened Taxa | www.threatenedtaxa.org | 26 November 2013 | 5(15): 4979–4993
Fishes of Bharathapuzha River
Bijukumar et al.
Image 1. Bharathapuzha River basin showing the major tributaries and streams
Image 2. Extent of forest cover in the Bharathapuzha River basin
Journal of Threatened Taxa | www.threatenedtaxa.org | 26 November 2013 | 5(15): 4979–4993
4981
Bijukumar et al.
© Rajeev Raghavan
Fishes of Bharathapuzha River
© Rajeev Raghavan
Image 3. Stream in the upper reaches of the Kalpathipuzha tributary
of Bharathapuzha River
© Rajeev Raghavan
Image 4. A cascade in Meenvallam in the Thoothapuzha tributary of
Bharathapuzha River
Image 5. Kunthipuzha stream inside the Silent Valley National Park
the Kunthipuzha stream (of Thoothapuzha tributary)
flowing through the Silent Valley National Park (Image
5) at multiple intervals from January 2004 to February
2013. Fishes were collected using a variety of active and
passive gears such as scoop nets, drag nets, cast nets, gill
nets and specially designed and fabricated net made of
mosquito nets. Random surveys were also carried out
in the major markets and landing centers along all the
five tributaries. Voucher specimens were preserved in
4% formaldehyde and whenever possible tissue samples
were preserved in 95% ethanol, and transferred to the
laboratory for further identification.
Species identification and morphometry
Fishes were identified by comparing measurements
and counts of the voucher specimens, with those of the
type/type series and/or as mentioned in the original
4982
description. All measurements were taken point to
point using dial calipers to the nearest 0.1mm. Voucher
specimens of all species recorded in this paper are
deposited at the Museum of the Department of Aquatic
Biology and Fisheries, University of Kerala (DAB-UoK),
Thiruvananthapuram, Kerala, India and the Conservation
Research Group, St. Albert’s College (CRG-SAC), Kochi,
India. All species names except for the members of
the super family Cobitoidea, adhere to the Catalog of
Fishes (Eschmeyer 2013) unless otherwise mentioned.
For species within the super family Cobitoidea, a recent
checklist by Kottelat (2012) has been followed.
RESULTS AND DISCUSSION
Diversity and distribution
A total of 117 species under 42 families and 81
genera were recorded from the Bharathapuzha River
system (Table 1). Of these, 98 species were primary
freshwater, and 19 were secondary freshwater and/
or diadromous species. Six species of non-native fish
were also recorded of which three (Cyprinus carpio,
Oreochromis mossambicus and O. niloticus) are exotic
Journal of Threatened Taxa | www.threatenedtaxa.org | 26 November 2013 | 5(15): 4979–4993
Fishes of Bharathapuzha River
ƚŽ ƚŚĞ ĐŽƵŶƚƌLJ͖ ǁŚŝůĞ ƚŚĞ ƌĞƐƚ ǁĞƌĞ ƚŚĞ /ŶĚŝĂŶ ŵĂũŽƌ
ĐĂƌƉƐ ;Catla catla͕ Cirrhinus mrigala ĂŶĚ Labeo rohitaͿ
ƚƌĂŶƐƉůĂŶƚĞĚĨƌŽŵƚŚĞŐĂŶŐĞƟĐƉůĂŝŶƐ͘
dŚĞŵĂŝŶĐŚĂŶŶĞůŽĨƚŚĞŚĂƌĂƚŚĂƉƵnjŚĂĨƌŽŵWĂƌĂůŝ
ƚŽ WƵƌĂƚŚŽŽƌ ĞƐƚƵĂƌLJ ŚĂĚ ƚŚĞ ŚŝŐŚĞƐƚ ƐƉĞĐŝĞƐ ƌŝĐŚŶĞƐƐ
;^сϳϱͿ ĨŽůůŽǁĞĚ ďLJ ƚŚĞ dŚŽŽƚŚĂƉƵnjŚĂ ;^сϱϳͿ ĂŶĚ
<ĂůƉĂƚŚŝƉƵnjŚĂ;^сϰϬͿ;&ŝŐ͘ϭͿ͘KĨƚŚĞϳϱƐƉĞĐŝĞƐĨŽƵŶĚŝŶ
ƚŚĞŵĂŝŶĐŚĂŶŶĞů͕ϭϵǁĞƌĞƐĞĐŽŶĚĂƌLJĨƌĞƐŚǁĂƚĞƌƐƉĞĐŝĞƐ͘
dŚŽŽƚŚĂƉƵnjŚĂ ƚƌŝďƵƚĂƌLJ ;ĞdžĐůƵĚŝŶŐ ƚŚĞ <ƵŶƚŚŝƉƵnjŚĂ
ƐƚƌĞĂŵͿ ŚĂƐ ƚŚĞ ŚŝŐŚĞƐƚ ƐƉĞĐŝĞƐ ƌŝĐŚŶĞƐƐ͕ ǁŚĞŶ ŽŶůLJ
ƉƌŝŵĂƌLJ ĨƌĞƐŚǁĂƚĞƌ ĮƐŚ ƐƉĞĐŝĞƐ ĂƌĞ ĐŽŶƐŝĚĞƌĞĚ͘
ůƚŚŽƵŐŚ <ƵŶƚŚŝƉƵnjŚĂ ƐƚƌĞĂŵ ŽĨ ƚŚĞ dŚŽŽƚŚĂƉƵnjŚĂ
ƚƌŝďƵƚĂƌLJŇŽǁŝŶŐƚŚƌŽƵŐŚƚŚĞ^ŝůĞŶƚsĂůůĞLJEĂƟŽŶĂůWĂƌŬ
ŚĂĚƚŚĞůŽǁĞƐƚƐƉĞĐŝĞƐƌŝĐŚŶĞƐƐ;^сϮϱͿ͕ŝƚŚĂƐǀĞƌLJŚŝŐŚ
ĐŽŶƐĞƌǀĂƟŽŶ ǀĂůƵĞ͕ ĂƐ ƚǁŽ ĞŶĚĞŵŝĐ ƐƉĞĐŝĞƐ͕ Balitora
jalpalliĂŶĚMesonoemacheilus remadeviiĂƌĞƌĞƐƚƌŝĐƚĞĚ
ƚŽƚŚŝƐƐƚƌĞĂŵ͘
dŚŝƌƚLJͲƚŚƌĞĞ ƐƉĞĐŝĞƐ ;ϮϴйͿ ƚŚĂƚ ŽĐĐƵƌ ŝŶ ƚŚĞ
ŚĂƌĂƚŚĂƉƵnjŚĂZŝǀĞƌĂƌĞĞŶĚĞŵŝĐƚŽƚŚĞtĞƐƚĞƌŶ'ŚĂƚƐ͕
ĞŝŐŚƚ ƐƉĞĐŝĞƐ ĂƌĞ ĞŶĚĞŵŝĐ ƚŽ ƚŚĞ ƌŝǀĞƌƐ ŽĨ <ĞƌĂůĂ͕ ĂŶĚ
ƚŚƌĞĞ ƐƉĞĐŝĞƐ ;Balitora jalpalli͕ Mesonoemacheilus
remadeviiĂŶĚPseudolaguvia austrinaͿĂƌĞĞŶĚĞŵŝĐƚŽ
ƚŚĞƌŝǀĞƌƐLJƐƚĞŵ͘KŶĞŵŽƌĞƐƉĞĐŝĞƐ;ůŝƐƚĞĚĂƐGarraƐƉ͘
ŝŶdĂďůĞϭ͖ƐĞĞĂůƐŽĂƉƉĞŶĚŝdžϭͿŵĂLJďĞĞŶĚĞŵŝĐƚŽƚŚĞ
tĞƐƚĞƌŶ 'ŚĂƚƐ͕ ŽŶĐĞ ŝƚƐ ƚĂdžŽŶŽŵŝĐ ŝĚĞŶƟƚLJ ŝƐ ĐůĞĂƌĞĚ͘
ůů ƚŚƌĞĞ ƐƉĞĐŝĞƐ ĞŶĚĞŵŝĐ ƚŽ ƚŚĞ ŚĂƌĂƚŚĂƉƵnjŚĂ ZŝǀĞƌ
ŚĂǀĞ Ă ƌĞƐƚƌŝĐƚĞĚ ĚŝƐƚƌŝďƵƟŽŶ ŝŶ ƚŚĞ dŚŽŽƚŚĂƉƵnjŚĂ
ƚƌŝďƵƚĂƌLJ͘tŚŝůĞB. jalpalliĂŶĚM. remadeviiĂƌĞĨŽƵŶĚ
ŝŶ ƚŚĞ <ƵŶƚŚŝƉƵnjŚĂ ƐƚƌĞĂŵ͕ P. austrina ŽĐĐƵƌƐ ĂƐ ƐŵĂůů
ĨƌĂŐŵĞŶƚĞĚ ƉŽƉƵůĂƟŽŶƐ ŝŶ ƚŚĞ <ĂŶũŝƌĂƉƵnjŚĂ ĂŶĚ
dŚŽŽƚŚĂƉƵnjŚĂƐƚƌĞĂŵƐ͘
ůŝƩůĞŵŽƌĞƚŚĂŶŽŶĞͲƚĞŶƚŚŽĨƐƉĞĐŝĞƐ;ϭϭй͖^сϭϯͿ
ƚŚĂƚŽĐĐƵƌŝŶƚŚĞŚĂƌĂƚŚĂƉƵnjŚĂĂƌĞůŝƐƚĞĚĂƐƚŚƌĞĂƚĞŶĞĚ
ŝŶƚŚĞ/hEZĞĚ>ŝƐƚŽĨdŚƌĞĂƚĞŶĞĚ^ƉĞĐŝĞƐ;&ŝŐ͘ϮͿ͘dŚŝƐ
Bijukumar et al.
dĂďůĞϭ͘&ŝƐŚĞƐŽĨƚŚĞŚĂƌĂƚŚĂƉƵnjŚĂZŝǀĞƌ͕ƚŚĞŝƌŵŝĐƌŽͲůĞǀĞů
ĚŝƐƚƌŝďƵƟŽŶ͕ĞŶĚĞŵŝƐŵĂŶĚ/hEƚŚƌĞĂƚƐƚĂƚƵƐ
&ĂŵŝůLJͬ^ƉĞĐŝĞƐ
ŝƐƚƌŝďƵƟŽŶ
/hE^ƚĂƚƵƐ
^ϯ
>
^ϱ
>
^ϱ
DD
^ϰ͕^ϱ
>
^ϱ
>
^ϰ͕^ϱ
>
^ϱ
E
Stolephorus commersonii >ĂĐĞƉğĚĞ͕
ϭϴϬϯ^ͬ
^ϱ
E
Thryssa dussumieri ;sĂůĞŶĐŝĞŶŶĞƐ͕
ϭϴϰϴͿ^ͬ
^ϱ
E
^ϱ
E
Catla catla;,ĂŵŝůƚŽŶ͕ϭϴϮϮͿ
^ϭ͕^ϯ͕^ϱ
>
Cirrhinus mrigala ;,ĂŵŝůƚŽŶ͕ϭϴϮϮͿ
^ϭ͕^ϯ͕^ϱ
>
Cyprinus carpio>ŝŶŶĂĞƵƐ͕ϭϳϱϴ
^ϭ͕^ϯ
Ͳ
Hypselobarbus kuraliDĞŶŽŶΘ
ZĞŵĂĚĞǀŝ͕ϭϵϵϱ¶¶
^ϭ
>
>ĂďĞŽĮŵďƌŝĂƚƵƐ;ůŽĐŚ͕ϭϳϵϱͿ
^ϭ
>
EŽƚŽƉƚĞƌŝĚĂĞ
Notopterus notopterus ;WĂůůĂƐ͕ϭϳϲϵͿ
ůŽƉŝĚĂĞ
Elops machnata ;&ŽƌƐƐŬĊů͕ϭϳϳϱͿ^ͬ
DĞŐĂůŽƉŝĚĂĞ
Megalops cyprinoides;ƌŽƵƐƐŽŶĞƚ͕
ϭϳϴϮͿ^ͬ
ŶŐƵŝůůŝĚĂĞ
Anguilla bengalensis;'ƌĂLJ͕ϭϴϯϭͿ
A. bicolor DĐůĞůůĂŶĚ͕ϭϴϰϰ
ůƵƉĞŝĚĂĞ
Dayella malabarica ;ĂLJ͕ϭϴϳϯͿ¶
ŚŝƌĂǀĂŇƵǀŝĂƟůŝƐĞƌĂŶŝLJĂŐĂůĂ͕ϭϵϮϵ
ŶŐƌĂƵůŝĚĂĞ
ŚĂŶŝĚĂĞ
Chanos chanos ;&ŽƌƐƐŬĊů͕ϭϳϳϱͿ^ͬ
LJƉƌŝŶŝĚĂĞ
L. rohita;,ĂŵŝůƚŽŶ͕ϭϴϮϮͿ
^ϭ͕^ϯ͕^ϱ
>
Osteochilichthys longidorsalis
WĞƚŚŝLJĂŐŽĚĂΘ<ŽƩĞůĂƚ͕ϭϵϵϰ¶
^ϰ
E
O. nashii;ĂLJ͕ϭϴϲϵͿ ;/ŵĂŐĞϭϭͿ
^ϲ
>
ĂƌďŽĚĞƐĐĂƌŶĂƟĐƵƐ;:ĞƌĚŽŶ͕ϭϴϰϵͿ¶¶
;/ŵĂŐĞϭϮͿ
^ϲ
>
^ϭ͕^Ϯ͕^ϯ͕^ϰ͕^ϱ
>
¶¶
ĂǁŬŝŶƐŝĂĮůĂŵĞŶƚŽƐĂ
;sĂůĞŶĐŝĞŶŶĞƐ͕ϭϴϰϰͿ
D. assimilis;:ĞƌĚŽŶ͕ϭϴϰϵͿ
¶¶
^ϰ
sh
Haludaria fasciata;:ĞƌĚŽŶ͕ϭϴϰϵͿ ¶¶
;/ŵĂŐĞϭϯͿ
^ϰ͕^ϲ
>
Pethia conchonius;,ĂŵŝůƚŽŶ͕ϭϴϮϮͿ
^Ϯ
>
^ϭ͕^Ϯ͕^ϯ͕^ϰ͕^ϱ
>
^ϭ͕^ϯ͕^ϰ
DD
^ϰ͕^ϱ
>
^ϭ͕^ϰ
DD
^ϭ͕^Ϯ͕^ϯ͕^ϰ͕^ϱ
>
W͘ƟĐƚŽ;,ĂŵŝůƚŽŶ͕ϭϴϮϮͿ
WƵŶƟƵƐĂŵƉŚŝďŝƵƐ;sĂůĞŶĐŝĞŶŶĞƐ͕
ϭϴϰϮͿ
P. chola;,ĂŵŝůƚŽŶ͕ϭϴϮϮͿ
P. mahecola;sĂůĞŶĐŝĞŶŶĞƐ͕ϭϴϰϰͿ
¶¶
P. parrahĂLJ͕ϭϴϲϱ¶¶
P͘sophore;,ĂŵŝůƚŽŶ͕ϭϴϮϮͿ
^Ϯ
>
^ϭ͕^Ϯ͕^ϰ͕^ϱ
>
Sahyadria denisonii;ĂLJ͕ϭϴϲϱͿ ¶¶
^ϰ
E
Systomus sarana ;,ĂŵŝůƚŽŶ͕ϭϴϮϮͿ
^ϭ͕^Ϯ͕^ϯ͕^ϰ͕^ϱ
>
^ϰ͕^ϱ
E
W͘ǀŝƩĂƚƵƐĂLJ͕ϭϴϲϱ
&ŝŐƵƌĞϭ͘&ŝƐŚƐƉĞĐŝĞƐƌŝĐŚŶĞƐƐŝŶĚŝīĞƌĞŶƚƚƌŝďƵƚĂƌŝĞƐŽĨƚŚĞ
ŚĂƌĂƚŚĂƉƵnjŚĂZŝǀĞƌĂŶĚƚŚĞ<ƵŶƚŚŝƉƵnjŚĂƐƚƌĞĂŵŝŶƚŚĞ^ŝůĞŶƚ
sĂůůĞLJEĂƟŽŶĂůWĂƌŬ
Tor malabaricus;:ĞƌĚŽŶ͕ϭϴϰϵͿ¶¶
Journal of Threatened Taxa | www.threatenedtaxa.org | 26 November 2013 | 5(15): 4979–4993
ϰϵϴϯ
Fishes of Bharathapuzha River
Bijukumar et al.
Family/Species
Distribution
Laubuca dadiburjori Menon, 1952
¶¶
IUCN Status
Family/Species
S5
LC
Ompok bimaculatus (Bloch, 1794)
Distribution
IUCN Status
S1, S3, S4
NT
S1, S4, S5
LC
S4
EN
S4, S6
VU
O. malabaricus (Valenciennes, 1840)
S1, S2, S3, S4
LC
Schilbeidae
S5, S6
LC
Pseudeutropius mitchelli Günther,
1864¶
S5
LC
Sisoridae
S2, S3, S4, S5
LC
S4, S5
EN
S1, S6
LC
Glyptothorax anamalaiensis Silas,
1952¶¶
S3, S4, S5
LC
G. annandalei Hora, 1923
S4, S6
LC
S4, S6
LC
Pseudolaguvia austrina
Radhakrishnan et al. 2010Ʃ
S4
NE
S1, S2, S4, S5, S6
LC
S1, S3, S4, S5
LC
Clarias dussumieri Valenciennes,
1840¶¶
S1, S3
NT
S5
LC
Heteropneustidae
S1, S2, S3, S4, S5
NE
S1, S2, S3, S5
LC
Garra menoni Indra & Rema Devi,
1984¶ (Image 14)
S6
VU
Ambassis ambassis (Lacepède,
1802)S/D
S5
LC
G. mullya (Sykes, 1839) (Image 15)
S1, S2, S3, S4,
S5, S6
LC
Parambassis dayi (Bleeker, 1874)
S4, S6
EN
P. thomassi (Day, 1870)¶¶
S6
-
L. fasciata Silas, 1958
¶
Salmophasia balookee (Sykes, 1839)
S. boopis (Day, 1874) ¶¶
Amblypharyngodon melettinus
(Valenciennes, 1844)
A. microlepis (Bleeker, 1853)
Barilius bakeri (Day, 1865)
¶¶
B. bendelisis (Hamilton, 1807)
B. gatensis (Valenciennes, 1844) ¶¶
Devario malabaricus (Jerdon,
1849)¶¶
D. aequipinnatus (McClelland, 1839)
Esomus danricus (Hamilton, 1822)
Rasbora dandia (Valenciennes,
1844)
G. joshuai Silas, 1954¶¶
Garra spa
¶¶
Clariidae
Heteropneustes fossilis (Bloch, 1794)
Ambassidae
S1, S5
LC
S1, S2, S3, S4, S5
LC
S5
LC
S1, S5
LC
S5
VU
S4
LC
Aplocheilus blockii Arnold, 1911
S4, S5
LC
A. lineatus (Valenciennes, 1846)
S1, S2, S3, S4, S5
LC
S5
LC
S5
NE
S5
NE
S5
NE
S5
NE
S5
LC
S5
NE
S5
LC
¶¶
Scatophagidae
Scatophagus argus (Linnaeus, 1766)
Balitoridae
S/D
Balitora jalpalli Raghavan et al.,
2013Ʃ
S6
NE
Hemirhamphidae
S4, S6
LC
Homaloptera menoni Shaji & Easa,
1995¶
Hyporhamphus limbatus
(Valenciennes, 1847)
S6
LC
H. pillai Indra & Remadevi, 1981
(Image 16)
H. xanthopterus (Valenciennes,
1847)
S6
LC
Belonidae
Bhavania australis (Jerdon, 1849)
¶¶
¶
Nemacheilidae
Xenentodon cancila (Hamilton, 1822)
Mesonoemacheilus guentheri Day,
1867¶¶ (Image 17)
Aplocheilidae
S4, S5, S6
LC
M. remadevii Shaji, 2002Ʃ
S4, S6
LC
M. triangularis Day, 1865¶¶
S2, S4, S5
LC
S6
LC
S4, S6
LC
Platycephalidae
S6
LC
Grammoplites scaber (Linnaeus,
1758)S/D
Lepidocephalichthys thermalis
(Valenciennes, 1846)
S2, S4, S6
LC
Pangio goaensis (Tilak, 1972)¶¶
S5
Nemacheilus monilis Hora, 1921¶¶
(Image 18)
Schistura denisoni Day, 1867¶¶
S. semiarmatus Day, 1867¶¶ (Image
19)
Cobitidae
Syngnathidae
Microphis cuncalus (Hamilton, 1822)
Centropomidae
LC
Bagridae
Lates calcarifer (Bloch, 1790)S/D
Sillaginidae
Sillago sihama (Forsskål, 1775)S/D
Carangidae
Batasio travancoria Hora & Law,
1941¶
S5
VU
Hemibagrus punctatus (Jerdon,
1849)¶¶
S4
CR
Mystus seengtee (Sykes, 1839)
S1, S2, S3, S4, S5
NE
S5
LC
S1, S2, S3, S4
NT
S1, S2, S5
LC
Lutjanus argentimaculatus (Forsskål,
1775)S/D
S3
LC
Gerreidae
M. gulio (Hamilton, 1822)
M. malabaricus (Jerdon, 1849)¶¶
M. montanus (Jerdon, 1849)
M. oculatus (Valenciennes, 1840) ¶¶
Siluridae
4984
Carangoides malabaricus (Bloch &
Schneider, 1801)S/D
Leiognathidae
Leiognathus equulus (Forsskål,
1775) S/D
Lutjanidae
Gerres filamentosus Cuvier, 1829S/D
Journal of Threatened Taxa | www.threatenedtaxa.org | 26 November 2013 | 5(15): 4979–4993
Fishes of Bharathapuzha River
Bijukumar et al.
&ĂŵŝůLJͬ^ƉĞĐŝĞƐ
ŝƐƚƌŝďƵƟŽŶ
/hE^ƚĂƚƵƐ
^ϱ
>
ϭ
dĞƌĂƉŽŶŝĚĂĞ
Terapon jarbua;&ŽƌƐƐŬĊů͕ϭϳϳϱͿ^ͬ
ϭϲ
ϲ
ϰ
EĂŶĚŝĚĂĞ
Nandus nandus;,ĂŵŝůƚŽŶ͕ϭϴϮϮͿ
Pristolepis marginata:ĞƌĚŽŶ͕ϭϴϰϵ¶¶
^ϯ͕^ϰ͕^ϱ
>
^ϰ
>
Z
ϲ
ϯ
E
sh
Ed
ŝĐŚůŝĚĂĞ
Etroplus maculatus;ůŽĐŚ͕ϭϳϵϱͿ
^ϭ͕^Ϯ͕^ϯ͕^ϰ͕^ϱ
>
E. suratensis;ůŽĐŚ͕ϭϳϵϬͿ
^ϭ͕^Ϯ͕^ϯ͕^ϰ͕^ϱ
>
Oreochromis mossambicus;WĞƚĞƌƐ͕
ϭϴϱϮͿ
^ϭ͕^Ϯ͕^ϯ͕^ϰ͕^ϱ
Ͳ
^ϱ
Ͳ
Chelon parsia;,ĂŵŝůƚŽŶ͕ϭϴϮϮͿ^ͬ
^ϱ
E
Mugil cephalus>ŝŶŶĂĞƵƐ͕ϭϳϱϴ
^ϱ
>
^ϱ
>
^ϭ͕^Ϯ͕^ϯ͕^ϰ͕^ϱ
>
^ϱ
>
^ϭ͕^Ϯ͕^ϯ͕^ϰ͕^ϱ
DD
^ϭ͕^ϯ͕^ϱ
>
^ϯ
>
K͘ŶŝůŽƟĐƵƐ;>ŝŶŶĂĞƵƐ͕ϭϳϱϴͿ
>
DD
ϳϳ
E
DƵŐŝůŝĚĂĞ
^ͬ
ůĞŽƚƌŝĚĂĞ
Eleotris fusca ;&ŽƌƐƚĞƌ͕ϭϴϬϭͿ
'ŽďŝŝĚĂĞ
Glossogobius giuris;,ĂŵŝůƚŽŶ͕ϭϴϮϮͿ
Sicyopterus griseus;ĂLJ͕ϭϴϳϳͿ
ŶĂďĂŶƟĚĂĞ
Anabas testudineus;ůŽĐŚ͕ϭϳϵϮͿ
KƐƉŚƌŽŶĞŵŝĚĂĞ
Pseudosphromenus cupanus;ƵǀŝĞƌ͕
ϭϴϯϭͿ
Osphronemus goramy>ĂĐĞƉĞĚĞ͕
ϭϴϬϭ
ŚĂŶŶŝĚĂĞ
Channa marulius;,ĂŵŝůƚŽŶ͕ϭϴϮϮͿ
^ϱ
>
^ϰ͕^ϲ
>
^ϭ͕^Ϯ͕^ϯ͕^ϰ͕^ϱ
>
Macrognathus guntheri;ĂLJ͕
ϭϴϲϱͿ¶¶
^ϭ͕^ϯ͕^ϰ͕^ϱ
>
Mastacembelus armatus;>ĂĐĞƉğĚĞ͕
ϭϴϬϬͿ
^ϭ͕^Ϯ͕^ϯ͕^ϰ͕
^ϱ͕^ϲ
>
^ϱ
E
^ϱ
E
^ϭ͕^ϯ͕^ϰ͕^ϱ
sh
C. gachua ;,ĂŵŝůƚŽŶ͕ϭϴϮϮͿ
C. striata;ůŽĐŚ͕ϭϳϵϯͿ
DĂƐƚĂĐĞŵďĞůŝĚĂĞ
LJŶŽŐůŽƐƐŝĚĂĞ
Cynoglossus macrostomusEŽƌŵĂŶ͕
ϭϵϮϴ^ͬ
^ŽůĞŝĚĂĞ
Brachirus orientalis;ůŽĐŚΘ
^ĐŚŶĞŝĚĞƌ͕ϭϴϬϭͿ^ͬ
dĞƚƌĂŽĚŽŶƟĚĂĞ
Carinotetraodon travancoricus;,ŽƌĂ
ΘEĂŝƌ͕ϭϵϰϭͿ¶¶
^ͬ
^ĞĐŽŶĚĂƌLJĨƌĞƐŚǁĂƚĞƌͬĚŝĂĚƌŽŵŽƵƐ͖
ŶĚĞŵŝĐƚŽtĞƐƚĞƌŶ'ŚĂƚƐ͖¶ŶĚĞŵŝĐƚŽ<ĞƌĂůĂ͖ŶĚĞŵŝĐƚŽŚĂƌĂƚŚĂƉƵnjŚĂ
ƌŝǀĞƌƐLJƐƚĞŵ
ŝƐƚƌŝďƵƟŽŶ͗^ϭ͗<ĂůƉĂƚŚŝƉƵnjŚĂ͖^Ϯ͗ŚŝƚŽŽƌƉƵnjŚĂ͖^ϯ͗'ĂLJĂƚƌŝƉƵnjŚĂ͖
^ϰ͗dŚŽŽƚŚĂƉƵnjŚĂ͖^ϱ͗ŚĂƌĂƚŚĂƉƵnjŚĂ;WĂƌĂůŝƚŽWƵƌĂƚŚŽŽƌĞƐƚƵĂƌLJͿ͖^ϲ͗
<ƵŶƚŚŝƉƵnjŚĂͬ^ŝůĞŶƚsĂůůĞLJEĂƟŽŶĂůWĂƌŬ
/hE^ƚĂƚƵƐ͗ZͲƌŝƟĐĂůůLJŶĚĂŶŐĞƌĞĚ͕EͲŶĚĂŶŐĞƌĞĚ͕shͲsƵůŶĞƌĂďůĞ͕EdͲ
EĞĂƌdŚƌĞĂƚĞŶĞĚ͕>Ͳ>ĞĂƐƚŽŶĐĞƌŶ͕ͲĂƚĂĞĮĐŝĞŶƚ͕EͲEŽƚǀĂůƵĂƚĞĚ
Ă
^ĞĞƉƉĞŶĚŝdžϭĨŽƌĂĚŝƐĐƵƐƐŝŽŶŽŶGarraƐƉ͘
¶¶
&ŝŐƵƌĞϮ͘ŽŶƐĞƌǀĂƟŽŶƐƚĂƚƵƐŽĨĮƐŚƐƉĞĐŝĞƐŽĐĐƵƌƌŝŶŐŝŶ
ŚĂƌĂƚŚĂƉƵnjŚĂZŝǀĞƌ;ŽŶůLJϭϭϯƐƉĞĐŝĞƐĂƌĞůŝƐƚĞĚŚĞƌĞĂƐϯƐƉĞĐŝĞƐ
ǁĞƌĞĞdžŽƟĐƚŽƚŚĞĐŽƵŶƚƌLJĂŶĚƚŚĞŝĚĞŶƟƚLJŽĨϭƐƉĞĐŝĞƐŶĞĞĚƐ
ĐŽŶĮƌŵĂƟŽŶͿ͘
ŝŶĐůƵĚĞƐ ŽŶĞ ƐƉĞĐŝĞƐ ůŝƐƚĞĚ ĂƐ ͚ƌŝƟĐĂůůLJ ŶĚĂŶŐĞƌĞĚ͛
;ZͿ;Hemibagrus punctatusͲŚŽǁĞǀĞƌ͕ƐĞĞĚŝƐĐƵƐƐŝŽŶŝŶ
ůŝ Ğƚ Ăů͘ ϮϬϭϯͿ͕ Ɛŝdž ƐƉĞĐŝĞƐ ůŝƐƚĞĚ ĂƐ ͚ŶĚĂŶŐĞƌĞĚ͛ ;EͿ
;ŚŽǁĞǀĞƌ͕ ƐĞĞ ŶŽƚĞ ŽŶ Garra joshuaiͿ ĂŶĚ Ɛŝdž ƐƉĞĐŝĞƐ
ůŝƐƚĞĚ ĂƐ ͚sƵůŶĞƌĂďůĞ͛ ;shͿ͘ DĂũŽƌŝƚLJ ŽĨ ƐƉĞĐŝĞƐ ;ϲϱй͖
^сϳϳͿĂƌĞůŝƐƚĞĚĂƐ͚>ĞĂƐƚŽŶĐĞƌŶ͛;>Ϳ͘dŚŽŽƚŚĂƉƵnjŚĂ
ƚƌŝďƵƚĂƌLJŚĂĚƚŚĞŚŝŐŚĞƐƚŶƵŵďĞƌŽĨƚŚƌĞĂƚĞŶĞĚƐƉĞĐŝĞƐ
;^сϭϬͿ;&ŝŐ͘ϮͿ͘
&ŝƐŚĞƐŽĨƚŚĞ^ŝůĞŶƚsĂůůĞLJEĂƟŽŶĂůWĂƌŬ
dŚĞ ^ŝůĞŶƚ sĂůůĞLJ EĂƟŽŶĂů WĂƌŬ ;EWͿ ;ĐŽƌĞ ĂƌĞĂ
ŽĨ ϴϵ͘ϱϮŬŵϮ ĂŶĚ Ă ďƵīĞƌ njŽŶĞ ŽĨ ϭϰ͘ϳϬŬŵϮͿ͕ ĂŶĚ ĂŶ
ĂůƟƚƵĚĞƌĂŶŐŝŶŐĨƌŽŵϮϬϬʹϮϯϴϯŵͿ;,ŽƐĂŐŽƵĚĂƌΘZŝũƵ
ϮϬϭϯͿŝƐŽŶĞŽĨƚŚĞŵŽƐƚŝŵƉŽƌƚĂŶƚĐŽŶƐĞƌǀĂƟŽŶĂƌĞĂƐ
ŝŶ ƚŚĞ tĞƐƚĞƌŶ 'ŚĂƚƐ͘ dǁŽ ƐƚƌĞĂŵƐ͕ ƚŚĞ ǁĞƐƚ ŇŽǁŝŶŐ
<ƵŶƚŚŝƉƵnjŚĂĚƌĂŝŶŝŶŐƚŚĞĐŽƌĞĂƌĞĂĂŶĚƚŚĞĞĂƐƚŇŽǁŝŶŐ
ŚĂǀĂŶŝĚƌĂŝŶŝŶŐƚŚĞĞĂƐƚĞƌŶƐĞŐŵĞŶƚŽĨƚŚĞďƵīĞƌnjŽŶĞ
ŽĨ ƚŚĞ ^ŝůĞŶƚ sĂůůĞLJ EĂƟŽŶĂů WĂƌŬ ;ƐĞĞ ĂƐĂ Θ ĂƐŚĂ
ϭϵϵϱͿ ĐŽŵƉƌŝƐĞ ƚŚĞ ƚLJƉĞ ůŽĐĂůŝƚLJ ŽĨ ĨŽƵƌ ƐƉĞĐŝĞƐ͕ ǀŝnj͕͘
Balitora jalpalli ;/ŵĂŐĞ ϲͿ, Garra menoni ;/ŵĂŐĞ ϭϰͿ,
Homaloptera pillaii ;/ŵĂŐĞ ϭϲͿ ĂŶĚ Mesonoemacheilus
remadevii ;/ŵĂŐĞϳͿ͘
dŚĞ<ƵŶƚŚŝƉƵnjŚĂƐƚƌĞĂŵŽĨƚŚĞ^ŝůĞŶƚsĂůůĞLJEĂƟŽŶĂů
WĂƌŬŚĂƐďĞĞŶƐƵƌǀĞLJĞĚŝŶƚŚĞƉĂƐƚďLJĞǀŝΘ/ŶĚƌĂ;ϭϵϴϲͿ
ĂŶĚĂƐĂΘĂƐŚĂ;ϭϵϵϱͿǁŚŽďŽƚŚƌĞĐŽƌĚĞĚϭϭƐƉĞĐŝĞƐ͘
ƵƌŝŶŐ ŽƵƌ ƐƵƌǀĞLJƐ ĐĂƌƌŝĞĚ ŽƵƚ ŝŶ ϮϬϭϬ͕ ǁĞ ƌĞĐŽƌĚĞĚ
Ϯϱ ƐƉĞĐŝĞƐ ;dĂďůĞ ϭͿ͕ ƚŚĞƌĞďLJ ŝŶĐƌĞĂƐŝŶŐ ƚŚĞ ŶƵŵďĞƌ
ŽĨ ĨƌĞƐŚǁĂƚĞƌ ĮƐŚĞƐ ŬŶŽǁŶ ĨƌŽŵ ƚŚĞ ^ŝůĞŶƚ sĂůůĞLJ EW͘
,ŽǁĞǀĞƌ͕ƚŚŝƐŶƵŵďĞƌĐĂŶŶŽƚďĞĐŽŶƐŝĚĞƌĞĚĂƐƚŚĞĂĐƚƵĂů
ĚŝǀĞƌƐŝƚLJŽĨƚŚĞEĂƟŽŶĂůWĂƌŬďĞĐĂƵƐĞƐĞǀĞƌĂůĂĚĚŝƟŽŶĂů
ƐƉĞĐŝĞƐĂƌĞĨŽƵŶĚŝŶƚŚĞĞĂƐƚŇŽǁŝŶŐŚĂǀĂŶŝZŝǀĞƌĂŶĚ
ƚŚĞ <ĂĚĂůƵŶĚŝ ZŝǀĞƌ ;ĚƌĂŝŶŝŶŐ ƚŚĞ ǁĞƐƚĞƌŶ ƐĞŐŵĞŶƚ ŽĨ
ƚŚĞďƵīĞƌnjŽŶĞͿ͕ǁŚŝĐŚŝƐŶŽƚŵĞŶƟŽŶĞĚŚĞƌĞŝŶ͘
Journal of Threatened Taxa | www.threatenedtaxa.org | 26 November 2013 | 5(15): 4979–4993
ϰϵϴϱ
Fishes of Bharathapuzha River
Bijukumar et al.
Range extension of Osteochilichthys longidorsalis
Pethiyagoda & Kottelat, 1994
Osteochilichthys longidorsalis was hitherto known
to be endemic to the Chalakudy and Periyar river
systems where it had a very restricted distribution (see
Raghavan & Ali 2011). During recent (February 2013)
field work in the Thoothapuzha tributary, we collected
a single specimen (CRG-SAC.2013.01; 79.98mm SL)
(Image 8) of a fish that resembled O. longidorsalis.
Detailed examination of the specimen indicated that
the measurements and counts (Table 2) were within the
range of topotypic material collected from Vettilapara,
Chalakudy River, and those mentioned in the original
description of Pethiyagoda & Kottelat (1994). We
therefore extend the range of O. longidorsalis to the
Bharathapuzha River system.
We believe that O. longidorsalis could have had a
much more extensive range of distribution north and
south of the Palakkad Gap in stream habitats providing
a very specific niche. But over time, the continuity in
the range of distribution was broken and inadequacy
of geographical coverage during surveys left isolated
Image 6. Balitora jalpalli, a balitorid loach endemic to the
Kunthipuzha stream of Silent Valley National Park [adapted from
Raghavan et al. 2013b]
© Fibin Baby/Josin Tharian
Image 7. Mesonoemacheilus remadevii, a balitorid loach endemic to
the Bharathapuzha River system.
Table 2. Morphometric characteristics of Osteochilichthys
longidorsalis collected from Bharathapuzha River
CRG.SAC.2013.01
Standard length (SL) in mm
Pethiaygoda &
Kottelat (1994)
79.9
102-235
Total length
136.5
126.8 - 138.1
Depth of body
30.9
29.2 - 33.2
% SL
Depth of caudal peduncle
13.2
11.3 - 13.1
Length of caudal peduncle
15.7
na
Lateral head length
25.0
20.8 - 25.3
Dorsal head length
21.4
20.7 - 23.4
Pre dorsal length
48.3
na
Pre anal length
75.8
na
Pre pelvic length
51.2
na
Maximum head width
16.1
14.2 - 16.8
Maximum body width
20.8
16.0 - 19.5
Pectoral fin length
24.4
22.7 - 26.3
Pelvic fin length
24.5
23.1 - 26.2
Dorsal fin length
28.4
24.1 - 46.6
Snout length
37.2
37 - 45
Eye diameter
31.9
22 - 29
% lateral HL
Inter orbital distance
43.8
36 - 51
Inter nares distance
26.2
28 - 36
4986
© Anvar Ali
Image 8. Specimen of Osteochilichthys longidorsalis, collected from
the Bharathapuzha River system.
© Anvar Ali
Image 9. Pseudolaguvia austrina, a sisorid catfish endemic to the
Bharathapuzha River system.
Image 10. Specimen of Hemibagrus cf punctatus recorded from
Kanjirapuzha tributary of Bharatapuzha River in 2008. [Scale in cm]
[Adapted from Ali et al. 2013]
Journal of Threatened Taxa | www.threatenedtaxa.org | 26 November 2013 | 5(15): 4979–4993
Fishes of Bharathapuzha River
Bijukumar et al.
© Josin Tharian
© Fibin Baby
Image 12. Barbodes carnaticus
Image 11. Osteochilichthys nashii
© Fibin Baby
Image 14. Garra menoni
© Fibin Baby
Image 13. Haludaria fasciata
© Josin Tharian
Image 16. Homaloptera pillaii
© Fibin Baby
Image 15 . Garra mullya
© Rajeev Raghavan
Image 17. Mesonoemacheilus guentheri
© Josin Tharian
Image 18. Nemacheilus monilis
populations unreported. Thus, there is also a possibility
that this species might occur in the upper reaches of the
neighbouring Chaliyar basin.
We prefer to retain the generic name Osteochilichthys
instead of Osteochilus as mentioned in the Catalog of
Fishes (Eschmeyer 2013). The reason being that no
© Rateesh
Image 19. Schistura semiarmatus
Journal of Threatened Taxa | www.threatenedtaxa.org | 26 November 2013 | 5(15): 4979–4993
4987
Fishes of Bharathapuzha River
Bijukumar et al.
taxonomic revision of this species has taken place and
Eschmeyer (2013) merely cites Thomas et al. (2002),
who, without any justification and discussion, chose to
use the name Osteochilus over Osteochilichthys in their
paper on the fishes of southern Kerala (see additional
discussion in Appendix 1).
New site record for Pseudolaguvia austrina
Radhakrishnan, Suresh Kumar & Ng, 2010
Pseudolaguvia austrina (Image 9) was the first
member of this genus described from peninsular India
near the town of Mannarkad (Kunthipuzha stream) in the
Bharathapuzha River system (Radhakrishnan et al. 2010).
During a recent survey (February 2013), one specimen
of P. austrina (CRG-SAC-2013. 11.1 30.34mm SL) was
collected from Thoothapuzha (~20km downstream of
the type locality). This forms a new site record.
Threats to the riverine ecosystem and biodiversity
Bharathapuzha comprise one of the 16 catchments
in the southern Western Ghats that has the highest
species richness and endemism of freshwater taxa
including fish, mollusc and odonates (Molur et al.
2011). It is also one of the five catchments along with
Periyar, Pamba, Manimala and Chaliyar that qualify as
potential freshwater ‘Key Biodiversity Areas’ (KBAs)
(Molur et al. 2011). In spite of this, Bharathapuzha is
one of the most degraded and threatened river systems
in the region. Several anthropogenic stressors including
deforestation and loss of riparian cover, dams and other
impoundments, pollution, sand mining, non-native
species, climate change and destructive fishing practices
are threatening the fish diversity of Bharathapuzha River
system.
Deforestation and loss of riparian vegetation: The
Bharathapuzha River basin has undergone large-scale
deforestation due to construction of several dams (Raj
& Azeez 2011). Deforestation is prominent in several
catchment areas such as Mangalam, Nelliyampathy,
Walayar, Malampuzha, Nellipuzha, Dhoni and
Kalladikode. Forest lands have been transformed
into largely monoculture plantations (Raj & Azeez
2010a). During the period 1973–2005, the natural
vegetation cover in the river basin declined by 31%, as
a result of the increase in area under plantations (Raj
& Azeez 2010b). The riparian vegetation along the
Bharathapuzha and its tributaries are severely disturbed
or in some cases totally destroyed. In addition, there is
also a threat from invasion by exotic plants all along the
river basin. The loss of forest cover at such high rates
impact freshwater fishes since a significant proportion of
4988
the riverine species in the Western Ghats region exploit
allochthonous food resources (Arunachalam 2000).
Increased sedimentation as a result of deforestation
changes the river bed habitat and thus degrades the
breeding substrate of many fish species (Dahanukar et
al. 2011). In this way, the deforestation in the upstream
catchments of the Bharathapuzha can impact several
hill stream loaches of the family Balitoridae, Cobitidae
and Nemacheilidae which require pebbles and gravel in
their microhabitats for breeding (Dahanukar et al. 2011).
There are at least 10 species of loaches inhibiting the
various hill streams tributaries of Bharathapuzha.
Dams and other impoundments: Dams are a major
threat to freshwater biodiversity (Vorosmarty et al. 2010).
Dams remove turbulent river sections and create tranquil
water bodies, thereby affecting flow and temperature
regimes, sediment transport, and species communities
(Liermann et al. 2012). Several dams worldwide now
impair habitat and migration opportunities for many
freshwater fish species (Liermann et al. 2012) including
those that are endemic and threatened (Xie et al. 2007).
Bharathapuzha has been dammed extensively,
mainly for irrigation and water diversion purposes.
Eleven irrigation projects and several surface dams in
the river basin cater to 493.06km2 agriculture lands
(Raj & Azeez 2010a). In addition, there are many check
dams - temporary or permanent small impoundments
for regulating water flow, on the Bharathapuzha. These
small dams retain excess water flow during monsoon
rains in a small catchment area behind the structure,
thereby replenishing nearby groundwater reserves and
wells. The dams and other impoundments along the
Bharathapuzha River have impacted the movements of
diadromous and catadromous species such as eels as
evident from the lesser abundance of eels in the river in
the recent past (A. Bijukumar & R. Raghavan pers. obser.
2012). The check dams in the river are also reported
to affect the water quality in upstream and downstream
areas (Bijukumar & Kurian 2008).
Pollution: Asian rivers are heavily polluted and
degraded (Dudgeon 2000). Pollution has also been
identified as the important threat to the fish fauna of the
Western Ghats (Dahanukar et al. 2011). Bharathapuzha
River basin supports extensive area under agriculture
and plantations. Agro-based pollutants such as chemical
fertilizers, pesticides, weedicides and nutrients are
frequently washed down into the river, constituting a
major ecological problem. Eutrophication has resulted
in the abundance of filamentous algae and weeds
in the lower reaches of the river, particularly from
Chamravattom to Purakkad. In addition to agro-based
Journal of Threatened Taxa | www.threatenedtaxa.org | 26 November 2013 | 5(15): 4979–4993
Fishes of Bharathapuzha River
pollutants, Bharathapuzha and its tributaries also receive
substantial amount of urban sewage. For example, the
town of Pattambi is one such polluted area along the
river, where the urban sewage canals directly open into
the river, through which the municipal waste is dumped.
Such large scale pollution not only degrades the habitat
but also causes endocrine disruptions and several other
physiological imbalances in fish including breeding
failure which could ultimately lead to their extirpation.
Limestone mining is being carried out in the
catchment areas of Malampuzha in the Kalpathipuzha
tributary, leading to siltation and pollution in the
streams and the reservoir. Silicate content of water
in this area has been found to be very high (Sushama
2003). Massive dumping of mining debris and wastes
has also completely destroyed the Seemanthinipuzha,
one of the streams joining the Malampuzha.
Sand mining: Over the years, indiscriminate sand
mining has caused irreparable damages to several river
systems on the southwestern coast of India (Sreebha
& Padmalal 2011). Indiscriminate sand mining from
Bharathapuzha has contributed immensely to the
destruction of the river, and is now the dominant threat
to the ecosystem and biodiversity of the river basin. The
entire river bed is dug up, and a large number of trucks
ply through the river bed daily to collect river sand.
The situation is most alarming between Pattambi and
Thirunavaya, where both legal and illegal sand quarrying
goes on unabatedly. We observed that in the Ottapalam
Revenue Division, in addition to the 18 stations (kadavus)
fixed by the Kerala Government for sand quarrying,
there are several ‘private’ kadavus operating in parallel
possibility with the connivance of authorities. The
quantity of sand collected from these private kadavus
exceeds those from legal ones. In addition, small-scale
removal of sand by local people is also damaging the
river bed in many areas. In Navalin Kadavu near the
village of Peringottukurussi, sand is collected in large
quantities from within the check-dams using large rafts
made of rubber tubes. The sand thus collected is then
loaded on to trucks and transported. In many places
small-scale removal of sand is not to cater for the local
demands, but for supplying the big contractors. Studies
conducted by Centre for Earth Science Studies (CESS),
Thiruvananthapuram (CESS 1997) have shown that the
rate of sand removal from the Bharathapuzha is several
times more than the natural rate of replenishment. Such
massive sand removal will have a highly detrimental
impact on ichthyofauna of the river as sand is the
preferred breeding substrate for many fish species. In
addition, sand mining alter aquatic food web as well
Bijukumar et al.
as nutrient cycles, and is a direct threat to the survival
of several species such as Glossogobius giuris and
Sicyopterus griseus that prefer sand substratum.
Non native species: Six species of non-native fish
occur in the Bharathapuzha (Table 1) of which three
(Cyprinus carpio, Oreochromis mossambicus and O.
niloticus) are exotic to the country, while the remaining
three are the Indian major carps (Catla catla, Cirrhinus
mrigala and Labeo rohita) which were transplanted
from the gangetic plains for stock enhancement and
aquaculture. Many reservoirs in the Bharathapuzha
basin have been stocked with the non-native carps as
well as the giant freshwater prawn (Macrobrachium
rosenbergii) during the last several decades and have
even been considered to be one of the success-stories of
capture based culture fisheries (Peters & Feustel 1998;
Kutty et al. 2008). Collections of these non-native carps
from the lower reaches of the river indicate their escape
from the reservoirs.
The first record of the Nile Tilapia, O. niloticus from
the rivers of Kerala was made from Bharathapuzha
(Bijukumar 2008). In addition, the Mozambique Tilapia,
O. mossambicus has established viable populations
throughout the river, including the estuarine areas. The
African catfish, Clarias gariepinus is being clandestinely
cultured in many regions of the Bharathapuzha basin and
may have found its way into the river system. However,
we have not been able to record any specimens as yet
from the wild.
Climate change: Freshwater fish are known to
be at an increasing risk to climate change especially
given the inextricable link between fish physiology and
temperature (see Ficke et al. 2007). The Bharathapuzha
watershed experiences an average annual rainfall of
2500mm, which is about 17% less than the state average
(Anon 1998). Recent studies have observed changes
in both rainfall and temperature in the river basin (Raj
& Azeez 2010a, Raj & Azeez 2011). An overall upward
trend in annual and daily temperature was observed
in the river basin during 1969 to 2005 (Raj & Azeez
2011). The impacts of climate change phenomena
on the ichthyofauna of Bharathapuzha remains to be
investigated further.
Unregulated aquarium fish exports: Unmanaged
aquarium fish collection and exports is an emerging
threat to the endemic fish diversity of Western Ghats
(Raghavan et al. 2013a). In Thoothapuzha tributary,
the endangered Sahyadria denisonii is being collected
in massive quantities for the ornamental fish trade,
even by government supported agencies such as Kerala
Aquatic Ventures Private Limited (KAVIL). In addition,
Journal of Threatened Taxa | www.threatenedtaxa.org | 26 November 2013 | 5(15): 4979–4993
4989
Fishes of Bharathapuzha River
Bijukumar et al.
species such as Mesonoemacheilus remadevii, restricted
to the Silent Valley National Park have been found to
be occurring in the trade (Raghavan et al. 2013a). This
shows a clear lack of co-ordination between various
government departments highlighting a serious lapse in
policy decisions.
Destructive fishing practices: The destructive fishing
methods recorded in the river basin include use of plant
poisons, dynamiting and the use of small mesh nets.
Dynamiting is more prevalent in the tributaries where
traditional fishermen are less in number.
Conservation measures
Like in other parts of the Western Ghats (see
Dahanukar et al. 2011), the multi-stakeholder issues
related to the use of fresh water in the Bharathapuzha
basin has meant that indigenous fish species are
least valued, and their conservation has never been a
priority. Dudgeon et al. (2006) considers the protection
and management of freshwater biodiversity as a
conservation challenge and suggests that a combination
of strategies and action plans would be highly essential
to conserve freshwater ecosystems and their resources.
Based on local conditions, we suggest a set of strategies
that will help protect the ecosystem and facilitate the
conservation and management of the native aquatic
fauna of Bharathapuzha.
Integrated watershed development programs
should be given top priority. To stop further ecological
degradation of the river and to ensure sufficient water
discharge downstream, any proposals for new check
dams should be treated with caution. Similarly, we
suggest that clearance should not be given to any new
medium or large dam in the Bharathapuzha River basin.
Ecorestoration activities should be taken up in several
stretches of the river using the River Management Fund
available with district authorities. The ecorestoration
activities can also be integrated into ongoing government
assisted programmes such as Mahatma Gandhi National
Rural Employment Generation Programme (MGNREGP)
and Western Ghats Development Programme. We
also suggest that all local self governments within the
river basin should include ecorestoration of river as
an integral component in their project planning and
implementation.
As sand mining is one of the most important threats
to the ecological integrity of the Bharathapuzha River
system, effective enforcement mechanisms should be
put into place to curb this menace. Suitable eco-friendly
alternatives to sand should also be popularised by
adopting awareness campaigns. Large scale cultivation
4990
and farming activities should be prohibited within the
river basin, and mechanisms should be adopted to
spread awareness to minimize the use of pesticides and
other agro-chemicals in the plantations located in the
upstream areas.
Spatial conservation options such as ‘aquatic
biodiversity management zones’ (ABMZ) and ‘fish
refugias’ should be declared for conserving important
areas rich in endemic and threatened species. The
thootha tributary is a potential site for consideration as
ABMZ as it harbours several endemic and threatened
species, and the habitat is subjected to considerable
illegal fishing including collection of endemic and
threatened fishes for the aquarium trade.
There is also a need to revise the Red List status
of several species of fishes including those that are
endemic to the Silent Valley National Park. Many
endemic species of this protected area were categorised
as ‘Least Concern’ in view of the absence of any current
or plausible future threats. However, recent studies (for
e.g., Raghavan et al. 2013a) have revealed that endemic
and restricted range species such as Mesonoemacheilus
remadevii are being collected and exported for the
aquarium pet trade thereby raising concerns on the
wild populations of the other endemic balitorid and
nemacheilid loaches as well.
Regulations should be brought into place to stop
the unmanaged collection of endemic and threatened
aquarium fishes from many areas in the river basin.
Stronger enforcement is also required to prohibit the use
of destructive fishing practices, especially dynamiting.
Though the Ministry of Agriculture, Government of India
has issued “Guidelines for the Import of Ornamental
Fishes into India” based on the recommendations
of the National Committee on Introduction of Exotic
Aquatic Species into India, it has failed to prevent the
entry of exotic fishes into the natural ecosystems of the
country including the Bharathapuzha. A legally binding
strategy is therefore required to regulate exotic fish
into the country, and to restore the ecosystems already
debilitated by the invasion of alien species.
Finally, there is a need for increased education
and awareness programs to improve the conservation
needs and profile of the Bharathapuzha River system.
Since information on the river and its ecology is
lacking, students and teachers from local schools and
colleges within the river basin can be employed for data
collection, monitoring and eco-restoration activities.
The Biodiversity Management Committees (BMCs)
at the local Panchayaths formed as per the Biological
Diversity Act of India (2002), as well as the traditional
Journal of Threatened Taxa | www.threatenedtaxa.org | 26 November 2013 | 5(15): 4979–4993
Fishes of Bharathapuzha River
Bijukumar et al.
Appendix 1: Taxonomic notes
For the sake of clarity, we provide notes on some of the generic/species names mentioned in this paper, which may be different from
previous papers published from the Western Ghats/Kerala region.
Garra sp (listed in table 1). This pertains to a species of Garra that has been routinely identified in the literature as Garra gotyla stenorhynchus.
Until the identity of Garra gotyla Gray is established with a neotype, and the species validity of the materials identified as Garra gotyla and
G. stenorhynchus from the Western Ghats is validated, we prefer to treat the Bharathapuzha material as Garra sp.
Hypselobarbus: There is considerable taxonomic ambiguity on the generic name (Gonoproktopterus vs. Hypselobarbus) of this group. We
follow Arunachalam et al. (2012) and Yang et al. (2012) and use the name Hypselobarbus instead of Gonoproktopterus.
Horalabiosa: Horalabiosa is a genus with a complex taxonomic history. For several years, Horalabiosa was considered to be a hybrid
between Garra and Rasbora (See Jayaram 2010). Subsequently, the type species, H. joshuai was considered to be a synonym of Garra
mullya (Talwar & Jhingran 1991). Devi (1993) established the validity of, and re-described H. joshuai based on the examination of more
than 500 individuals. However, recent molecular studies have re-proposed Horalabiosa as a junior synonym of Garra (Yang et al. 2012),
which we follow.
Osteochilichthys: We follow Pethiyagoda et al. (2012) and Karnasuta (1993) and use the generic name Osteochilichthys (for O. longidorsalis)
instead of Osteochilus as mentioned in the Catalog of Fishes (Eschmeyer 2013). The reason being that Eschmeyer (2013) merely cites
Thomas et al. (2002) who without any justification and discussion, chose to use the name Osteochilus over Osteochilichthys in their paper
on the fishes of southern Kerala.
Barbodes: Pethiyagoda et al. (2012) mentions that Jerdon’s (1849) description of B. carnaticus is uninformative, and there is no known
surviving type material; and as a result, subsequent authors have followed Day’s (1878: 563, pl. 137) conception of the species. However,
Pethiyagoda & Kottelat (2005) suggested that the figure of Barbus carnaticus in Day (1878: pl. 137) possibly illustrates a species of
Neolissochilus. However, examination of Day’s materials in the Australian Museum (see Pethiyagoda et al. 2012) reveals that they differ from
Neolissochilus. The exact generic status of this taxon is therefore uncertain (Pethiyagoda et al. 2012), and we retain the name Barbodes,
pending detailed taxonomic investigations. Although Arunachalam et al. (2012) placed Barbodes carnaticus into another unresolved genus
‘Hypselobarbus’, this was not based on taxonomical evidence and/or range wide sampling. In addition, there is no mention whether they
had used topotypic material of B. carnaticus. There are also several inconsistencies in the results of Arunachalam et al. (2012) as they
illustrate a specimen of Gonoproktopterus dubius and wrongly identify it as B. carnaticus (Arunachalam et al. 2012; Fig 1. p 64).
Sahyadria: A new genus, Sahyadria has been proposed to include the two species of Redline Torpedo Barbs, Sahyadria denisonii and S.
chalakkudiensis (see Raghavan et al. 2013)
fishing communities, students involved in the National
Green Corps (NGC) and eco-club networks could be
effectively used to monitor and conserve fish habitats. in
the Bharathapuzha River basin.
REFERENCES
Ali, A., N. Dahanukar, A. Kanagavel, S. Philip & R. Raghavan (2013).
Records of the endemic and threatened catfish, Hemibagrus
punctatus from the southern Western Ghats with notes on its
distribution, ecology and conservation status. Journal of Threatened
Taxa
5(11):
4569–4578;
http://dx.doi.org/10.11609/JoTT.
o3427.4569-78
Anonymous (1998). Watershed Atlas of Kerala. Vol. I and II. Kerala
State Land Use Board, Kerala State Remote Sensing & Environment
Centre, Department of Space and Soil Conservation Wing.
Arunachalam, M., M. Raja, M. Muralidharan & R.L.
Mayden (2012). Phylogenetic relationships of species
of Hypselobarbus (Cypriniformes: Cyprinidae): an enigmatic clade
endemic to aquatic systems of India. Zootaxa 3499: 63–73.
Arunachalam, M. (2000). Assemblage structure of stream fishes
in the Western Ghats. Hydrobiologia 430: 1–31; http://dx.doi.
org/10.1023/A:1004080829388
Bijukumar, A. (2008). First record of Nile Tilapia, Oreochromis niloticus
L. (Pisces: Cichlidae) from Kerala. Journal of Inland Fisheries Society
of India 40(2): 68–69.
Bijukumar, A. & K.A. Abraham (2008). Impact of check dams on
the hydrography of a tropical river, Bharathapuzha, Kerala, India.
Екологія та ноосферологія 19(1–2): 11–18.
Bijukumar, A. & S. Sushama (2001). The fish fauna of Bharathapuzha
river, Kerala. Journal of the Bombay Natural History of India 98(3):
464–468.
Center for Earth Science Studies (CESS). (1997). A report on
Bharathapuzha River. Submitted to the Government of Kerala by
Centre for Earth Science Studies, Thiruvananthapuram, June, 1997.
Dahanukar, N., R. Raghavan, A. Ali, R. Abraham & C.P. Shaji (2011). The
status and distribution of freshwater fishes of the Western Ghats,
pp. 21–48. In: The Status and Distribution of Freshwater Biodiversity
in the Western Ghats, India. In: Molur, S., K.G. Smith., B.A. Daniel.
& W.R.T. Darwall (eds)., International Union for Conservation of
Nature (IUCN), Gland, Switzerland and Zoo Outreach Organization
(ZOO) Coimbatore, India.
Day, F. (1865). The Fishes of Malabar. London. i-xxxii+293pp, 20pls.
Day, F. (1878). The Fishes of India; Being a Natural History of the Fishes
Known to Inhabit the Seas and Fresh Waters of India, Burma, and
Ceylon Part 4. Quaritsch, London, i-xx+553–779, pls. 139–195.
Devi, K.R. (1993). Fishes of Kalakkad Wildlife Sanctuary, Tirunelveli
District, Tamil Nadu, India, with a redescription of Horalabiosa
joshuai Silas. Records of the Zoological Survey of India 92 (1–4):
193–209.
Devi, K.R. & T.J. Indra (1984). Garra menoni a new Cyprinid fish from
Silent Valley, Kerala, South India. Bulletin of Zoological Survey of
India 5: 121–122.
Devi, K.R. & T.J. Indra (1986). Fishes of Silent Valley. Records of
Zoological Survey of India 84(1–4): 243–257.
Journal of Threatened Taxa | www.threatenedtaxa.org | 26 November 2013 | 5(15): 4979–4993
4991
Fishes of Bharathapuzha River
Bijukumar et al.
Devi, K.R., T.J. Indra, M.B. Raghunathan & M.S. Ravichandran (2005).
Fish fauna of the Anamalai hill ranges, Western Ghats, India. Zoos’
Print Journal 20(3): 1809–1811; http://dx.doi.org/10.11609/JoTT.
ZPJ.1164a.1809-11
Dudgeon, D., A.H. Arthington, M.O. Gessner, Z.I. Kawabata, D.J.
Knowler, C. Leveque, R.J. Naiman, A.H Prieur-Richard, D. Soto,
M.L.J. Stiassny & C.A. Sullivan (2006). Freshwater biodiversity:
importance, threats, status and conservation challenges.
Biological Reviews 81: 163–182; http://dx.doi.org/10.1017/
S1464793105006950
Dudgeon, D. (2000). The ecology of tropical Asian rivers and streams
in relation to biodiversity conservation. Annual Reviews of Ecology
and Systematics 31: 239–263; http://dx.doi.org/10.1146/annurev.
ecolsys.31.1.239
Easa, P.S. & S.C. Basha (1995). A survey of the habitat and distribution
of stream fishes in the Kerala part of Nilgiri Biosphere Reserve.
Kerala Fisheries Research Institute No. 104.
Easa, P.S. & C.P. Shaji (1997). Freshwater fish diversity in Kerala part of
the Nilgiri Biosphere Reserve. Current Science 73: 180–182.
Eschmeyer, W.N. (Ed). Catalog of Fishes. California Academy of
Sciences (http://research.calacademy.org/research/ichthyology/
catalog/fishcatmain.asp). Electronic version accessed 21 May 2013.
Ficke, A.D., C.A. Myrick. & L.J. Hansen (2007). Potential impacts of
global climate change on freshwater fisheries. Reviews in Fish
Biology and Fisheries 17(4): 581–613; http://dx.doi.org/10.1007/
s11160-007-9059-5
Herre, A.W.C.T. (1942). Glyptothorax housei, a new sisorid catfish from
south India. Stanford Ichthyological Bulletin 2 (4): 117–119.
Herre, A.W.C.T. (1945). Notes on fishes in the zoological museum of
Stanford University XX. New fishes from china and india - A new
genus and a new Indian record. Journal of the Washington Academy
of Science 35: 399–404.
Hosagoudar, V.B. & M.C. Riju (2013). Foliicolous fungi of Silent Valley
National Park, Kerala, India. Journal of Threatened Taxa 5(3): 3701–
3788; http://dx.doi.org/10.11609/JoTT.o3302.01-88
Indra, T.J. & K.R. Devi (1981). A new species of the genus Homaloptera
from Silent Valley, Kerala, South India. Journal of the Bombay
Natural History Society 84: 67–70.
Jayaram, K.C. (2010). The Freshwater Fishes of the Indian Region.
Narendra Publishing House, New Delhi, India, 616p+XXXIX plates.
Jerdon, T.C. (1849). On the fresh-water fishes of southern India.
(continued from p. 149.) Madras Journal of Literature and
Science 15(2): 302–346.
Karnasuta, J. (1993). Systematic revision of southeastern Asiatic
cyprinid fish genus Osteochilus with description of two new species
and a new subspecies. Kasetsart University Fishery Research Bulletin
19: 105.
Kottelat, M. (2012). Conspectus cobitidium: an inventory of the
loaches of the world (Teleostei: Cypriniformes: Cobitoidea). The
Raffles Bulletin of Zoology Suppl 26: 1–199.
Kurup, B.M., K.V. Radhakrishnan & T.G. Manojkumar (2004).
Biodiversity status of fishes inhabiting rivers of Kerala (south India)
with special reference to endemism, threats and conservation
measures. In: Welcomme, R.L. & T. Petr. (eds). Proceedings of the
Second International Symposium on the Management of Large
Rivers for Fisheries 2 (LARS2), Cambodia, 310pp.
Kutty, M.N., C.M. Nair & K.R. Salin (2008). Reservoir fisheries of
freshwater prawn - success story of an emerging culture-based
giant freshwater prawn fishery at Malampuzha Dam in Kerala, India.
Aquaculture Asia Magazine, April–June 2008: 40–41.
Liermann, C.R., C. Nilsson, J. Robertson, R.Y. Ng (2012). Implications
of Dam Obstruction for Global Freshwater Fish Diversity. Bioscience
62(6): 539–548; http://dx.doi.org/10.1525/bio.2012.62.6.5
Molur, S., K.G. Smith, B.A. Daniel & W.R.T. Darwall (compilers)
(2011). The Status and Distribution of Freshwater Biodiversity in
the Western Ghats. International Union for Conservation of Nature
(IUCN), Gland, Switzerland and Zoo Outreach Organization (ZOO)
Coimbatore, India.
Peters, D.M. & C. Feustel (1998). Social and economic aspects of
4992
fisheries enhancements in Kerala reservoirs. In: Petr, T. (ed.). Inland
Fishery Enhancements. FAO Fisheries Technical Paper 374, 463p.
Pethiyagoda, R., M. Meegaskumbura & K. Maduwage (2012). A
synopsis of the South Asian fishes referred to Puntius (Pisces:
Cyprinidae). Ichthyological Exploration of Freshwaters 23(1): 69–95.
Pethiyagoda, R. & M. Kottelat (1994). New species of fishes of the
genera Osteochilichthys (Cyprinidae), Travancoria (Balitoridae) and
Horabagrus (Bagridae) from the Chalakudy River, Kerala, India.
Journal of South Asian Natural History 1: 97–116.
Pethiyagoda, R. & M. Kottelat (2005).The identity of the south Indian
barb Puntius mahecola (Teleostei: Cyprinidae). Raffles Bulletin of
Zoology, Supplement, 12: 145–152
Radhakrishnan, K.V., S. Sureshkumar & H.H. Ng (2010). Pseudolaguvia
austrina, a new species of sisorid catfish (Osteichthyes: Siluriformes)
from Peninsular India. Ichthyological Explorations of Freshwaters
21(4): 377–383.
Raghavan, R. (2011). Need for further research on the freshwater
fish fauna of the Ashambu Hills landscape: a response to Abraham
et al. Journal of Threatened Taxa 3(5): 1788–1791; http://dx.doi.
org/10.11609/JoTT.o2755.1788-91
Raghavan, R., N. Dahanukar, M. Tlusty, A. Rhyne, K.K. Kumar, S. Molur
& A. Rosser (2013a). Uncovering an obscure trade: threatened
freshwater fishes and the aquarium markets. Biological Conservation
164: 158–169; http://dx.doi.org/10.1016/j.biocon.2013.04.019.
Raghavan, R., S. Philip, A. Ali & N. Dahanukar (2013). Sahyadria, a
new genus of barbs (Teleostei: Cyprinidae) from Western Ghats of
India. Journal of Threatened Taxa 5(15): 4932–4938; http://dx.doi.
org/10.11609/JoTT.o3673.4932-8
Raghavan, R., J. Tharian, A. Ali, S. Jadhav & N. Dahanukar (2013b).
Balitora jalpalli, a new species of stone loach (Teleostei:
Cypriniformes: Balitoridae) from Silent Valley, southern Western
Ghats, India. Journal of Threatened Taxa 5(5): 3921–3934; http://
dx.doi.org/10.11609/jott.o3277.3921-34
Raj, P.P.N & P.A. Azeez (2009). Spatial and temporal variation in surface
water chemistry of a tropical river, the river Bharathapuzha, India.
Current Science 96(2): 245–251.
Raj, P.P.N. & P.A. Azeez (2010a). Changing rainfall in the Palakkad
plains of South India. Atmosphera 23(1): 75–82.
Raj, P.P.N. & P.A. Azeez (2010b). Land use and land cover changes
in a tropical river basin: a case from Bharathapuzha River basin,
southern India. Journal of Geographic Information System 2: 185–
193; http://dx.doi.org/10.4236/jgis.2010.24026
Raj, P.P.N. & P.A. Azeez (2011). Temperature rise in the Bharathapuzha
river basin, southern India. Current Science 101(4): 492.
Raj, P.P.N. & P.A. Azeez (2012). morphometric analysis of a tropical
medium river system: a case from Bharathapuzha River southern
India. Open Journal of Modern Hydrology 2: 91–98; http://dx.doi.
org/10.4236/ojmh.2012.24011
Shaji, C.P. (2002). Mesonoemacheilus remadevii (Pisces: Balitoridae.
Nemeacheilinae) from Silent Valley National Park, Kerala. Indian
Journal of Fisheries 49(2): 217–221.
Silas, E.G. (1958). Studies on cyprinid fishes of the oriental
genus Chela Hamilton. Journal of the Bombay Natural History
Society 55(1): 54–99+2pls.
Silas, E.G. (1951). On a collection of fish form the Annamalai and
Nelliampathi Hill ranges (Western Ghats) with notes on its
zoogeographical significances. Journal of the Bombay Natural
History Society 49: 670–681.
Sreebha S. & D. Padmalal (2011). Environmental Impact Assessment
of sand mining from the small catchment river in the southwestern
coast of India. Environmental Management 47: 130–140; http://
dx.doi.org/10.1007/s00267-010-9571-6
Sushama, S. (2003). Ecology and Biodiversity of Nila River. PhD Thesis,
University of Kerala, India
Sushama S., R. Tresa & A. Bijukumar (2004). Distribution of fishes in
the Nila River. Indian Journal of Fisheries 51(3): 385–387.
Talwar, P. K. & A. G. Jhingran. (1991). Inland Fishes of India and
Adjacent Countries (in two volumes). Oxford & IBH Publishing Co.,
New Delhi, Bombay, Calcutta. v. 1-2: i-xvii+36 unnumbered+1-1158,
Journal of Threatened Taxa | www.threatenedtaxa.org | 26 November 2013 | 5(15): 4979–4993
Fishes of Bharathapuzha River
1pl, 1 map.
Thomas, K.R., M.J. George & C.R. Biju (2002). Freshwater fishes of southern Kerala with notes on the
distribution of endemic and endangered species. Journal of the Bombay Natural History Society
99 (1): 47–53.
Vorosmarty, C.J., P.B. McIntyre, M.O. Gessner, D. Dudgeon, A. Prusevich, P. Green, S. Glidden, S.E.
Bunn, C.A. Sullivan, C.R. Liermann & P.M. Davies (2010). Global threats to human water security
and river biodiversity. Nature 467: 555–561; http://dx.doi.org/10.1038/nature09440
Xie, S., Z. Li, J. Liu, S. Xie, H Wang & B.R. Murphy (2007). Fisheries of the Yangtze River Show
Immediate Impacts of the Three Gorges Dam. Fisheries 32(7): 343–344.
Yang, L., M. V. Hirt, T. Sado, M. Arunachalam, R. Manickam, K.L. Tang, A.M. Simons,
H.-H. Wu, R.L. Mayden & M. Miya (2012). Phylogenetic placements of the barbin
genera Discherodontus, Chagunius, and Hypselobarbus in the subfamily Cyprininae (Teleostei:
Cypriniformes) and their relationships with other barbins. Zootaxa 3586: 26–40.
Journal of Threatened Taxa | www.threatenedtaxa.org | 26 November 2013 | 5(15): 4979–4993
View publication stats
Bijukumar et al.
Author Details: A. Bijukumar is interested
in biodiversity documentation and
taxonomy, and involved in biodiversity/
environmental education activities to
facilitate conservation. Siby Philip is
interested in molecular phylogenetics,
evolution and biogeography of freshwater
fishes of the South Asia region. Anvar Ali
interested in taxonomy and systematics of
freshwater fishes of the Western Ghats.
S. Sushama is interested in ecology of
freshwater systems. Rajeev Raghavan is
interested in interdisciplinary research
focused on generating information
and developing methods to support
conservation
decision-making
in
freshwater ecosystems.
4993