Sexual maturity, fecundity and egg size of wild and cultured samples of Bagrus bayad macropterus

Tsadu, S.M. and Lamai, S.L. and Oladimeji, A.A. (2003) Sexual maturity, fecundity and egg size of wild and cultured samples of Bagrus bayad macropterus. In: 16th Annual Conference of the Fisheries Society of Nigeria (FISON) , 4-9 November 2001 ,Maiduguri, Nigeria, pp. 112-126.

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Abstract

Twenty four matured samples of Bagrus bayad macropterus from the wild (Shiroro Lake, Nigeria) and under captivity, size ranging from 412.69-3300.00 g total body weight, were analysed for sexual maturity,fecundity and egg size. The average fecundity obtained were 53352.59 and 21028.32 eggs for the wild and cultured fish respectively.Positive relationship was observed between fecundity, body size and gonad weight. Fecundity increased as body size increased. A more positive and linear relationship was observed between fecundity and gonad weight than fecundity and total body weight. Egg diameter,length and weight were determined from the egg samples. The mean size range of eggs for cultured fish was 0.74-1.05 mm of diameter; 1.01-1.20 mm of length and 0.25-0.40 mg of weight. Wild samples had mean size range of 0.68-l.09 mm of diameter, 0.85-1.38 mm of length and egg mean weight range was 0.15- 0.40 mg. Sexual maturity is dependent on size (1 kg and above). The egg diameter, egg length and weight bear no relationship with each other. Gonad development study indicated that gonad development was faster under captivity than in wild

Item Type: Conference or Workshop Item
Title: Sexual maturity, fecundity and egg size of wild and cultured samples of Bagrus bayad macropterus
Personal Creator/Author:
CreatorsEmail
Tsadu, S.M.
Lamai, S.L.
Oladimeji, A.A.
Page Range: pp. 112-126
Date: 2003
Event Title: 16th Annual Conference of the Fisheries Society of Nigeria (FISON)
Event Type: Conference
Event Location: Maiduguri, Nigeria
Event Dates: 4-9 November 2001
Issuing Agency: Fisheries Society of Nigeria
Uncontrolled Keywords: Nigeria, Lake Shiroro; body size; body weight; developmental stages; embryonic development; experimental culture; fecundity; fish eggs; freshwater fish; lakes; sexual maturity; Bagrus bajad
Subjects: Biology
Item ID: 3604
Depositing User: Ms Maria Kalentsits
Date Deposited: 07 Jul 2010 07:17
Last Modified: 29 Sep 2011 17:06
URI: http://aquaticcommons.org/id/eprint/3604

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