Estimating the growth parameters, exploitation rate, biomass and maximum sustainable yield of long whisker catfish Mystus gulio (Hamilton, 1822) in the coastal waters from southwestern Bangladesh.

Autor: Rahman O; Department of Fisheries, University of Rajshahi, Rajshahi, 6205, Bangladesh.; Institute of Natural Resources Research and Development, Rajshahi, 6206, Bangladesh., Laboni TA; Department of Fisheries, University of Rajshahi, Rajshahi, 6205, Bangladesh., Khatun MS; Department of Fisheries, University of Rajshahi, Rajshahi, 6205, Bangladesh., Rahman MA; Department of Fisheries, University of Rajshahi, Rajshahi, 6205, Bangladesh.; Institute of Natural Resources Research and Development, Rajshahi, 6206, Bangladesh., Islam MA; Department of Fisheries, University of Rajshahi, Rajshahi, 6205, Bangladesh.; Institute of Natural Resources Research and Development, Rajshahi, 6206, Bangladesh., Rahman MM; Department of Fisheries, University of Rajshahi, Rajshahi, 6205, Bangladesh., Parvin MF; Institute of Natural Resources Research and Development, Rajshahi, 6206, Bangladesh.; Institute of Environment Sciences, University of Rajshahi, Rajshahi, 6205, Bangladesh., Abedin MJ; Department of Zoology, Carmichael College, National University, Bangladesh., Hossain MY; Department of Fisheries, University of Rajshahi, Rajshahi, 6205, Bangladesh.
Jazyk: angličtina
Zdroj: Heliyon [Heliyon] 2024 Apr 16; Vol. 10 (8), pp. e29788. Date of Electronic Publication: 2024 Apr 16 (Print Publication: 2024).
DOI: 10.1016/j.heliyon.2024.e29788
Abstrakt: The research provides a comprehensive analysis of Mystus gulio including growth pattern, growth parameters, recruitment patterns, mortality rates, biomass, exploitation rate ( E ), and the estimation of maximum sustainable yield ( MSY ) within the southwestern coastal waters of Bangladesh. From January to December 2017, fishers provided around 1200 specimens. FAO-ICLARM Stock Assessment Tool and Excel-add-in-solver were used to assess stock status through length-frequency data. Indeed, the research findings indicated that the population of M. gulio displayed negative allometric for both individuals ( b  = 2.53 for male, b  = 2.50 for female), as demonstrated by the calculated allometric coefficient value. Nonetheless, the population's dynamic characteristics revealed an asymptotic length ( L ∞ ) of 19.34 cm, 23.28 cm and growth coefficient ( K ) 0.94 year -1 and 0.81 year -1 for male and female M. gulio . The growth performance indexes (Ø') of 2.55 and 2.64 for male and female and maximum lifespan ( t max ) 3.20 years and 3.70 years respectively. This study revealed that the slightly variations in the natural mortality rate ( M ) for both specimens at 1.55 year -1 and 1.59 year -1 . The fishing mortality rate ( F ) 2.75 year -1 and 1.98 year -1 and total mortality rate ( Z ) 4.30 year -1 and 3.57 year -1 for male and females, respectively. The maximum permissible exploitation rate ( E max  = 0.421) was lower than the actual exploitation rate ( E  = 0.63). The MSY was calculated at 67.968 metric tons. Without a doubt, overfishing stands out as the most critical threat to the wild stock. Therefore, it is clear that the existing fishing approach was not efficiently managed the standing stock in a sustainable manner. The findings would be useful for established proper fishing regulations in coastal waters and the surrounding ecosystems.
Competing Interests: The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Obaidur Rahman reports financial support was provided by Ministry of Science and Technology, Bangladesh. If there are other authors, they declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(© 2024 The Authors. Published by Elsevier Ltd.)
Databáze: MEDLINE
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