Population Parameters of Siluroid Catfish (Eutropiichthys vacha) from Indus River, Pakistan

Abstract

Population dynamics parameters and exploitation status of Eutropiichthys vacha (Hamilton, 1822)

Assessing the exploitation status of main catfish Eutropiichthys vacha based on length based stock assessment models in the Kaptai Lake from Bangladesh

“…During this study, the calculated Ø 0 for E. vacha was 3.14 based on asymptotic length. Memon et al (2017) studied that the Ø 0 are 2.662, 2.859, 2.869 for combined sexes, male and females, respectively which is almost similar with our findings. Furthermore, Life span (t max ) of E. vacha calculated as 2.73 years in the Kaptai Lake.…”

“…Although this species is categorized as least concern but still this species is not widely abundant in the Kaptai Lake and still facing various threats for decline therefore, appropriate measure should be taken to conserve this species in their natural habitat. Based on Memon et al (2017), E. vacha is not over-exploited from Indus River that is not in accordance with our results. This work will be helpful to develop management policies for this fish and to introduce appropriate fishing guidelines for better management of fishes in hilly region of Bangladesh.…”

“…E. vacha was attained 28.69g as asymptotic BW with the growth coefficient ( K ) of 0.70 year −1 . According to Memon et al. (2017) , the L ∞ , t 0 and K were 35.7 cm, -0.358 year and 0.36 year −1 , respectively from Indus River, Pakistan.…”

“…E. vacha was attained 28.69g as asymptotic BW with the growth coefficient (K) of 0.70 year À1 . According to Memon et al (2017), the L ∞ , Table 3. Methods used to calculate natural mortality (M) of Eutropiicthys vacha (Hamilton, 1822) in the Kaptai Lake, Bangladesh through natural mortality estimator (NME).…”

“…In stock assessment, natural mortality is the substantial feature for fisheries management. According to Memon et al (2017), the total mortality (Z), natural mortality (M), and fishing mortality (F) were 1.09 year À1 , 0.762 year À1 and 0.33 year À1 for combined sex but 1.85 year À1 , 1.129 year À1 and 0.721 year À1 for males and 1.51 year À1 , 1.041 year À1 and 0.469 year À1 for females from Indus River, Pakistan. Memon et al (2017) also reported exploitation rate (E) was 0.302 for combined sex, 0.389 for males and 0.31 for females from Indus River, Pakistan which is dissimilar with our findings.…”