Life-history traits of a tropical bagrid catfish, Mystus mysticetus Roberts, 1992, caught from the Mekong Delta, Vietnam.

Autor: Phan TQ; Department of Biology School of Education Can Tho University Can Tho Vietnam., Vo LTT; Department of Biology School of Education Can Tho University Can Tho Vietnam., Tran AN; Department of Biology School of Education Can Tho University Can Tho Vietnam., Dinh QM; Department of Biology School of Education Can Tho University Can Tho Vietnam.
Jazyk: angličtina
Zdroj: Ecology and evolution [Ecol Evol] 2023 Jul 09; Vol. 13 (7), pp. e10280. Date of Electronic Publication: 2023 Jul 09 (Print Publication: 2023).
DOI: 10.1002/ece3.10280
Abstrakt: Population's biological parameters, including length at first capture, mortalities, exploitation rates, growth coefficient, longevity, and recruitment times, are essential in assessing fishing status, but there is no data on Mystus mysticetus . Therefore, the study was conducted to provide these parameters to assess the fishing status of this species at Cai Rang, Can Tho (CRCT) and Long Phu, Soc Trang (LPST). A collection of 741 individual fish was used for analysis and showed that most fish size groups ranged from 9.0 cm to 12.0 cm, and the asymptotic length was 16.8 cm for both CRCT and LPST populations. The fish population von Bertalanffy curve was L t  = 16.80(1 - e -0.51( t  + 0.38) ) at CRCT and L t  = 16.80(1 - e -0.48( t  + 0.40) ) at LPST. The fish growth coefficient at CRCT (2.16) was higher than at LPST (2.13), whereas the reverse case was true for longevity ranging from 5.88 years (at CRCT) to 6.25 years (at LPST). At CRCT, fishing mortality, natural mortality, total mortality, and exploitation rate were 0.69/year, 1.40/year, 2.09/year, and 0.33, respectively; at LPST, these values were 0.75/year, 1.33/year, 2.08/year, and 0.36, respectively. Although the population parameter of this fish species exhibited a spatial variation, both CRCT and LPST fish resources have not been subjected to overexploit because E (0.33 at CRCT and 0.36 at LPST) is lower than E 0.1 (0.707 at CRCT and 0.616 at LPST).
Competing Interests: The authors declare that they have no competing interests.
(© 2023 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.)
Databáze: MEDLINE
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