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2020, Acta Scientific Agriculture
Trichopsis vittata (Cuvier 1831), a freshwater croaking gourami (Osphronemidae), typically regarded as a negative biological indicator , has been recorded from four different freshwater habitats in Bangladesh during the study period from December 2017 to August 2018. Taxonomic identification was confirmed from the external appearance, morphometric measurements and meristic counts of the species. The body was laterally elongated with clearly visible stripes and black blotch above the pectoral fin base. Average total length, standard length, pre-dorsal length, pelvic fin base length, dorsal fin base length, anal-fin base length, and pectoral-fin base length were 5.3 cm, 3.64 cm, 2.36 cm, 2.17 cm, 1.95 cm, 1.5 cm, and 1.0 cm. The number of rays in the dorsal fin, anal fin, pectoral fin, pelvic fin, and caudal fin were 7-10, 31-34, 9-11, 5-8 and 14-17. The occurrence of T. vittata in these rivers indicates their rapid spreading across the country within a very short period of time. Intensive research programs along with counter surveys are suggested to cross-check their spreading pattern, ecological sensitivity, and impacts on native fish biodiversity.
Journal of Fisheries and Life Sciences
First record of invasive croaking gourami, Trichopsis vittata (Cuvier 1831) in South-eastern Bangladesh2019 •
Introduction of invasive species is one of the major causes of native biodiversity loss as it can alter and degrade the habitat status; reduce food supplies, and poses threats to the environment. The croaking gourami Trichopsis vittata (Cuvier, 1831), a Southeast Asian freshwater teleost fish from the Osphronemidae family, is generally known as an invasive alien species. Recently, a notable number of individuals of this species have been recorded from the southeastern Feni-Muhuri river system of Bangladesh during the study period from December 2017 to August 2018. Taxonomic identification was confirmed from the external appearance, morphometric measurements and meristic counts of the species. The body was laterally elongated with clearly visible stripes and black blotch above the pectoral fin base. Average total length, standard length, pre-dorsal length, pelvic fin base length, dorsal fin base length, anal-fin base length, and pectoral-fin base length were 5.3 cm, 3.64 cm, 2.36 cm, 2.17 cm, 1.95 cm, 1.5 cm, and 1.0 cm. The number of rays in the dorsal fin, anal fin, pectoral fin, pelvic fin, and caudal fin were 7-10, 31-34, 9-11, 5-8 and 14-17. The occurrence of T. vittata in this river indicates their rapid spreading across the country within a very short time. It is quite obvious that they must compete for niche space and food with native fish species and affect the native fish biodiversity. So, intensive research works along with counter surveys are recommended to cross-check their spreading pattern, ecological sensitivity and impacts on native fish biodiversity for proper management and conservation.
This study represents the morphometric and meristic characters of the least concern, Trichogaster fasciata (Bloch & Schneider, 1801) including length-weight relationships (LWRs) and length-length relationships (LLRs) using a total of six linear dimensions and various meristic counts from the Gajner Beel, a large wetland ecosystem of northwestern Bangladesh. Sums of 324 specimens of T. fasciata were occasionally collected from the Gajner Beel during the period from July 2017 to June 2018, using different traditional fishing gears. Fin rays were counted with the help of a magnifying glass. Moreover, a total of seven different lengths (e.g., TL, SL, PrDL etc.) were measured using digital slide calipers, and the total body weight (BW) was weighed by an electronic balance with a 0.01 g accuracy for each individual, respectively. Minimum and maximum sizes were 3.1-8.8 cm (Mean ± SD = 5.78 ± 1.50) in total length (TL) and 0.81-13.15 g (Mean ± SD = 4.90 ± 3.30) in body weight (BW). All LWRs were highly significant (p< 0.001) with r 2 values ≥ 0.960. Based on the r 2 value, the LWRs by BW vs. TL constitute the finest fitted model among seven equations. In addition, the LLRs also had significance with r 2 values ≥ 0.993. Based on the r 2 values, the LLRs by TL vs. SL was the best fitted model among six equations. The fin formula of T. fasciata is: dorsal, D. XV-XVII/10-14; pectoral, Pc. 9-10; pelvic, Pv. 1; anal, A. XV-XVIII/15-19 and caudal, C. 18-20. This study will contribute to species identification and stock assessment of Gajner Beel and the adjacent ecosystems.
Egyptian Journal of Aquatic Biology and Fisheries
Growth, Condition, Maturity and Mortality of the Dwarf Gourami, Trichogaster lalius (Hamilton, 1822) in a Wetland Ecosystem (Beel Dakatia), Southwestern BangladeshBangladesh Journal of Zoology
Fishes of Gobiidae Family, Recorded from the Rivers and Estuaries of Bangladesh: Morphometric and Meristic Studies2016 •
Journal of Applied Ichthyology
Length-weight relationships of three Gobiidae species from the Rupsha River in southwestern Bangladesh2016 •
Population morphometry including population demography, size group distribution, length weight relationship and sex ratio of an important freshwater fish, Colisafasciata was studied which collected fromJessore and Jhenaidah districts in Bangladesh during May, 2014 to April, 2015. Random samples of 201 individuals (108males and 93 females) were collected from different fish markets in Jessore (Monirampur, Borobazar, Chowgasa) and Jhenaidah (Mohespur, Barobazar, Kotchandpur) districst. The mean size of the specimen was recorded 65.08 ±14.32 mm in length and 7.43 ±3.09 g in body weight. Females were found little smaller than males. The specimens were larger in winter than summer and monsoon season. But in monsoon season the females were larger than males. The maximum length of the specimen collected from Jhenaidah district was smaller compare to the specimen of Jessore district. Most of the population (29%) was observed under 55-64 mm size class. Linear relationship was obtained between the log length (mm) and log weight (g) of the species in respects of sexes, seasons, and districts. The allometric coefficient 'b' of the relationship indicated negative allometric growth of the species as 'b' value was less than 3. The overall sex ratio (male: female=1:0.86)showed significant difference from the expected value 1:1. Overall males showed non-significant over females (χ 2 =1.119) in all season of both districts but in November males showed the significant (P<0.01) dominance over females. However, the findings of the present study have helped us to understand more about the species is the prerequisites in fishery management strategy and culture system. Keywords: morphometric study; banded gourami; fishery management strategy and culture system 1. Introduction The banded gourami, Colisa fasciata (Bloch and Schneider, 1801) is the largest gourami in its genus. The species belonging to the family Anabantidae is one of the perch commonly found in Asia. It is locally known as " khoilsha ". The fish is popular due to attractive color and food value. Hobbyists like these fish for their excellent color and behavior and commonly reared all over the world in the aquarium together with its relative C. chuna and C. lalia. In eastern and northeastern Bangladesh, the fish has very high consumer demand. The fish is found in the swamps, ponds, ditches, marshes (Rahman, 1989) and the shallow margins of rivers covered with thick vegetation and weeds (Menon, 1999). It is found all fresh water areas in Bangladesh (Rahman, 2005).The natural resources of this species are fast declining in Bangladesh due to drastic reduction of the natural feeding and breeding ground as a result of human intervention, climate change and modification of its
Indian Journal of Geo Marine Sciences
Checklist of fish species in the Shari-Goyain river, Bangladesh: Threats and conservation measures2021 •
The study was conducted to investigate the fish diversity status of the Shari-Goyain river, in the northeastern part of Bangladesh. A total of 66 fish species belong to 9 orders and 27 families were identified. Among these, almost 80% of the total fish population was from the orders, Siluriformes, Cypriniformes, and Perciformes. Fishes from the family Cyprinidae (22.71%) were found to be most abundant. Among 14 common groups of fishes identified, the highest contribution (28.79%) was from the catfishes. Ten vulnerable, eight endangered, and one critically endangered fish species were recorded. Alarmingly, based on their availability, 25 % and 18 % of the entire fish community were found to be rare and very rare, respectively. The present study suggests various conservation initiatives entailing the establishment of the fish sanctuary, ranching of threatened fish species, strict enactment of fishing laws and community-based fisheries management.
Journal of Applied Ichthyology
First record of the South American sailfin catfishPterygoplichthys multiradiatusin Bangladesh2008 •
2016 •
Population morphometry including population demography, size group distribution, length weight relationship and sex ratio of an important freshwater fish, Colisafasciata was studied which collected fromJessore and Jhenaidah districts in Bangladesh during May, 2014 to April, 2015. Random samples of 201 individuals (108males and 93 females) were collected from different fish markets in Jessore (Monirampur, Borobazar, Chowgasa) and Jhenaidah (Mohespur, Barobazar, Kotchandpur) districst. The mean size of the specimen was recorded 65.08 ±14.32 mm in length and 7.43 ±3.09 g in body weight. Females were found little smaller than males. The specimens were larger in winter than summer and monsoon season. But in monsoon season the females were larger than males. The maximum length of the specimen collected from Jhenaidah district was smaller compare to the specimen of Jessore district. Most of the population (29%) was observed under 55-64 mm size class. Linear relationship was obtained between the log length (mm) and log weight (g) of the species in respects of sexes, seasons, and districts. The allometric coefficient ‘b’ of the relationship indicated negative allometric growth of the species as ‘b’ value was less than 3. The overall sex ratio (male: female=1:0.86)showed significant difference from the expected value 1:1. Overall males showed non-significant over females (χ2 =1.119) in all season of both districts but in November males showed the significant (P<0.01) dominance over females. However, the findings of the present study have helped us to understand more about the species is the prerequisites in fishery management strategy and culture system.
The Journal of Physical Chemistry A
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A robust study on 2019-nCOV outbreaks through non-singular derivative2021 •
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