Length weight relationship, condition factors and fecundity of Chrysichthys nigrodigitatus and Chrysichthys walkeri in Asejire Lake

Taiwo, I.O. and Aransiola, M.O. (2003) Length weight relationship, condition factors and fecundity of Chrysichthys nigrodigitatus and Chrysichthys walkeri in Asejire Lake. In: 16th Annual Conference of the Fisheries Society of Nigeria (FISON) , 4-9 November 2001 ,Maiduguri, Nigeria, pp. 277-281.

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Abstract

Sex ratio and fecundity variations of Chrysichthys nigrodigitatus and Chrysichthys walkeri from Asejire Lake (Nigeria) were examined. The Logarithm transformation of weight (W) against standard length (SL) gave a straight-line graph represented by the following equations: 1) C. nigrodigitatus LogW =-0.66 + 2.13 Log SL; = 0.854; (P < 0.001) n = 209; 2) C. walkeri LogW = -1.23 + 2.63 Log SL; = 0.759; (P < 0.001) n = 237. Males were generally more than females in both species. The ratio of males:females was higher in C. nigrodigitatus (1:0.18) than in C. walkeri (1:0.8). C. walkeri attained sexual maturity at a smaller size of 20.0 g (12.0 cm Standard Length) compared with C. nigrodigitatus maturity size of 45.0 g (14.0 cm Standard Length). Relative fecundity was not dependent on body weight and standard length for C. walkeri but it was significant at P < 0.05 and P < 0.01 respectively for C. nigrodigitatus

Item Type: Conference or Workshop Item
Title: Length weight relationship, condition factors and fecundity of Chrysichthys nigrodigitatus and Chrysichthys walkeri in Asejire Lake
Personal Creator/Author:
CreatorsEmail
Taiwo, I.O.
Aransiola, M.O.
Page Range: pp. 277-281
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 Asejire; condition factor; fecundity; freshwater fish; length-weight relationships; sex ratio; spawning; Chrysichthys nigrodigitatus; Chrysichthys walkeri
Subjects: Biology
Item ID: 3633
Depositing User: Ms Maria Kalentsits
Date Deposited: 07 Jul 2010 07:10
Last Modified: 29 Sep 2011 17:04
URI: http://aquaticcommons.org/id/eprint/3633

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