Taiwo, I.O. and Aransiola, M.O.
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.
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
Conference or Workshop Item
||Length weight relationship, condition factors and fecundity of Chrysichthys nigrodigitatus and Chrysichthys walkeri in Asejire Lake
||16th Annual Conference of the Fisheries Society of Nigeria (FISON)
||4-9 November 2001
||Fisheries Society of Nigeria
||Nigeria, Lake Asejire; condition factor; fecundity; freshwater fish; length-weight relationships; sex ratio; spawning; Chrysichthys nigrodigitatus; Chrysichthys walkeri
Ms Maria Kalentsists
||07 Jul 2010 07:10
||29 Sep 2011 17:04
Actions (login required)