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Journal of Cell and Animal Biology Vol. 1(5), 078-081, December, 2007
ISSN 1996-0867
© 2007 Academic Journals
Full Length Research Paper
Reproductive fitness of
stressed female broodstock of Clarias gariepinus (Burchell, 1809)
Aiyelari, T. A., Adebayo, I. A. and Osiyemi, A. S.
Department of Forestry, Wildlife and Fisheries Management, Faculty of
Agricultural Sciences, University of Ado-Ekiti, Nigeria P. M. B 5363
Ado-Ekiti, Ekiti State, Nigeria.
*Corresponding author. E-mail:
antofunmi@yahoo.com
Accepted 3 December, 2007
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Reproductive
fitness of female brood stock of Clarias gariepinus was
determined using three different stress conditions; confinement and
starvation for 12 hours before hormone injection; keeping fish out of
water after hormone treatment (Latency period) and transportation.
Broodstock of eight months old with an average weight ranging between
450 and 750 g were used for the experiment. There was no significant
different (p>0.05) in hatchability of eggs among the stressed
conditions. Survivability of fry within twenty one days of hatching was
also not significantly different (p>0.05) among the conditions. Whatever
mortality observed in injected females was attributed to stress while
fry mortality was due to cannibalism as a result of congestion. The
result showed that female broodstock of C. gariepinus can
accommodate or withstand some level of stress beyond which damaging
effects may be seen in the reproductive performance.
Key words:
Reproductive
fitness, stress conditions, Clarias gariepinus, broodstock. |
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