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Mortality and Exploitation Rates of Challawa Gorge Dam Fishes, Kano State, Nigeria | OMICS International| Abstract
ISSN: 2332-2608

Journal of Fisheries & Livestock Production
Open Access

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  • Research Article   
  • J Fisheries Livest Prod 2018, Vol 6(1): 262
  • DOI: 10.4172/2332-2608.1000262

Mortality and Exploitation Rates of Challawa Gorge Dam Fishes, Kano State, Nigeria

Ahmad IM1*, Yola ID2 and Suleiman N3
1Department of Biological Sciences, Abubakar Tafawa Balewa University, P.M.B. 0248, Bauchi State, Nigeria
2Department of Biological Sciences, Bayero University Kano, Kano State, Nigeria
3Department of Biological Sciences, Gombe State University, Gombe State, Nigeria
*Corresponding Author : Ahmad IM, Department of Biological Sciences, Abubakar Tafawa Balewa University, P.M.B. 0248, Bauchi State, Nigeria, Tel: +234 818 071 4594, Email: ibgausee@yahoo.com

Received Date: Jan 22, 2018 / Accepted Date: Feb 20, 2018 / Published Date: Feb 24, 2018

Abstract

Analyses were done on length-frequency data to study the mortality and exploitation rates of fish species of Challawa gorge dam. The species were: Bagrus bayad macropterus, Synodontis schall, Oreochromis niloticus, Pollimyrus isidori, Marcusenius senegalensis, Schilbe uranoscopus, Clarias lazera, Lates niloticus, Brycinus nurse and Auchenoglanis occidentalis. The total mortality (Z), the fishing mortality (F), the natural mortality (M), the current exploitation rate (E), Probabilities of Capture and their Biological Reference Points were all assessed. Bagrus b. macropterus, Synodontis schall, Clarias lazera, Lates niloticus, Schilbe uranoscopus and Auchenoglanis occidentalis were over-exploited. Oreochromis niloticus was optimally harvested. While Pollimyrus isidori, Brycinus nurse and Marcusenius senegalensis were underexploited.

Keywords: Mortality; Exploitation; Fish; Challawa; Dam

Citation: Ahmad IM, Yola ID, Suleiman N (2018) Mortality and Exploitation Rates of Challawa Gorge Dam Fishes, Kano State, Nigeria. J Fisheries Livest Prod 6: 262. Doi: 10.4172/2332-2608.1000262

Copyright: © 2018 Ahmad IM, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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