Comparative study on the catch efficiency and size selection of entangling nets in Lake Kainji, Nigeria

Adimula, A.B. and Fasakin, E.A. and Adebayo, O.T. (2005) Comparative study on the catch efficiency and size selection of entangling nets in Lake Kainji, Nigeria. In: 19th Annual Conference of the Fisheries Society of Nigeria (FISON) , 29 Nov - 03 Dec 2004 ,Ilorin, Nigeria, pp. 255-263.

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Abstract

The relative catch performance and selectively of gillnets and trammel nets were investigated in 12 sampling stations in Lake Kainji, Nigeria. 3 types of nets with dimensions 50mx3m were constructed using 76mm and 178mm meshsizes for two gillnets, 76mm and 178mm meshsizes for the lint and ar mour nets of the trammelnets respectively. All the nets were randomly ganged together to form a fleet of nine nets each, and were set twice in each of the 12 stations which gave a total of 24 fishing operations. A total of 365 fish weighing 88.9kg and belonging to 16 different species were caught in all the nets. The trammelnet had the highest catch by number and weight constituting 60% and 69.22% of the total catch and weight respectively with a relative species Diversity Index of 0.82. This was followed by 76mm gillnet which constituted 38.63% by number, 28.09% by weight, 0.69 relative Species Diversity Index. The 178mm gillnet had the least catch of 1.37% and 2.9% by number and weight respectively with 0.25 relative Species Diversity Index. There was significant difference (P<0.05) in the number and weight of fish caught in the different nets. The minimum selection length for these species caught were the same for each net. The trammel net had a wider selection range that skewed to the right, a higher modal and median length indicating larger individual species being entangled in the net

Item Type: Conference or Workshop Item
Title: Comparative study on the catch efficiency and size selection of entangling nets in Lake Kainji, Nigeria
Personal Creator/Author:
CreatorsEmail
Adimula, A.B.
Fasakin, E.A.
Adebayo, O.T.
Page Range: pp. 255-263
Date: 2005
Event Title: 19th Annual Conference of the Fisheries Society of Nigeria (FISON)
Event Type: Conference
Event Location: Ilorin, Nigeria
Event Dates: 29 Nov - 03 Dec 2004
Issuing Agency: Fisheries Society of Nigeria
Uncontrolled Keywords: Nigeria, Lake Kainji; catch/effort; construction; construction materials; entangling nets; gear selectivity; gillnets
Subjects: Fisheries
Item ID: 4034
Depositing User: Ms Maria Kalentsits
Date Deposited: 23 Aug 2010 08:41
Last Modified: 29 Sep 2011 16:40
Related URLs:
URI: http://aquaticcommons.org/id/eprint/4034

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