TY  - JOUR
T1  - Influence of Broodstock Age on Reproductive Success in the African Catfish <I>Chrysichthys nigrodigitatu</I>s (Claroteidae Lac&eacute;pede, 1803)
AU - , Koffi Pangni AU - , Boua Celestin Atse AU - , N’Guessan Joel Kouassi 
JO  - Research Journal of Animal Sciences
VL  - 2
IS  - 5
SP  - 139
EP  - 143
PY  - 2008
DA  - 2001/08/19
SN  - 1993-5269
DO  - rjnasci.2008.139.143
UR  - https://makhillpublications.co/view-article.php?doi=rjnasci.2008.139.143
KW  - Broodstock age
KW  -reproductive success
KW  -African catfish
KW  -Chrysichthys nigrodigitatus
AB  - The influence of female age and size on reproductive success and egg quality was investigated in <I>Chrysichthys nigrodigitatus</I>. Three confined groups were formed following fish age and size during spawning period. The results show that spawning rate increased with female age and size. Spawning rate was similar in 3+ and 4+ females (80 %). But only 50% of 2+ females have spawned. Absolute fecundity of <I>C. nigrodigitatus</I> was higher in 4+ females (9877±386) than in 2+ ones (6939±1024). The 3+ females had an intermediate absolute fecundity (8378±797). Nevertheless, relative fecundity decrease when the age of females increase. Moreover, egg size is positively strength correlated with female age. The 4+ females with a larger body size have produced large size eggs and larvae. Similarly, the hatching rate was higher in 4+ females intermediate in 3+ females and lower in the 2+ ones.
ER  -