Forthcoming

Population dynamics parameters of Bigeye grunt Brachydeuterus auratus (Pisces, Haemulidae) from the continental shelf of Côte d’Ivoire (West Africa)

Authors

  • Tizié Thierry Zan-Bi Département Ressources Aquatiques Vivantes (DRAV), Centre de Recherches Océanologiques d’Abidjan (CRO), B.P.V 18 Abidjan, Côte d’Ivoire
  • Soumaïla Sylla Département Ressources Aquatiques Vivantes (DRAV), Centre de Recherches Océanologiques d’Abidjan (CRO), B.P.V 18 Abidjan, Côte d’Ivoire
  • N’Goran David Vincent Kouakou N’Goran David Vincent Kouakou
  • Stanislas Arra Laboratoire d’Environnement et de Biologie Aquatique Université Nangui Abrogoua, 02 B.P. 801 Abidjan 02, Côte d’Ivoire
  • Samuel Kweku Konney Amponsah Department of Fisheries and Water Resources, University of Energy and Natural Resources, Box 214, Sunyani, Ghana

DOI:

https://doi.org/10.5281/zenodo.6795832

Keywords:

Brachydeuterus auratus, Côte d’Ivoire, population dynamics, mortality, recruitment

Abstract

The population structure, growth, mortality, and exploitation rate of big-eye grunt Brachydeuterus auratus were examined from the continental shelf of Côte d’Ivoire (West Africa) between August 2016 and July 2018. This study provides results on fishery dynamics parameters to contribute to estimating the stock assessment of this fish species. Monthly length-frequency data were collected and analyzed using the Stock Assessment Tools-II (FISAT II) software. The total lengths ranged from 8.76 to 24.56 cm, the dominant length group ranged from 15 to 16 cm (16.9%). The length-weight relationship parameters were W = 0.00872TL3.16 (r2 = 0.94). Von Bertalanffy parameters were estimated at asymptotic total length (L) = 24.68 cm, coefficient of growth rate (K) = 0.46 year-1, growth performance index (Ø’) = 2.45, time at which length equals zero (t0) = -0.38 year. Mortality parameters were calculated as a total mortality rate (Z) = 1.84 year-1, the natural mortality rate (M) = 1.10 year-1, and fishing mortality rate (F) = 0.74 year-1. The exploitation rate (E) = 0.40 year-1 was lower than the optimal level, indicating that Brachydeuterus auritus fishery is not overexploited.

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Published

2022-07-05

How to Cite

Zan-Bi, T. T. ., Sylla, S. ., Vincent Kouakou, N. D. ., Arra, S. ., & Amponsah, S. K. K. . (2022). Population dynamics parameters of Bigeye grunt Brachydeuterus auratus (Pisces, Haemulidae) from the continental shelf of Côte d’Ivoire (West Africa) . Journal of Wildlife and Biodiversity, 6(X), x-x. https://doi.org/10.5281/zenodo.6795832

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