Growth, Feed Utilisation and Condition Factor of Clarias gariepinus Fingerlings Fed ad-libitum in Different Hatcheries
Muhammed Oyinlola, Abdul Oyebanji Waidi
Federal University of Agriculture, Abeokuta, Nigeria
A farm adaptive research was carried out on the production of African catfish juveniles (Clarias gariepinus) within three weeks. C. gariepinus fingerlings of average weight 0.84 g ±0.55 were raised under two different hatchery conditions (outdoor and indoor) and fed with three different commercial feeds namely; Le-Gouessant, Coppens and Multi-Feed. The commercial feeds were fed ad-libitum to the fingerlings. The feeds were accepted and utilised for growth. In the outdoor hatchery there were significant differences among the mean values of weight gain while percentage weight gain showed no significant difference (p>0.05). C. gariepinus fed Le-Gouessant diet had the best feed conversion ratio compared to those fed Coppens and multi-feed. For the indoor hatchery, there were no significant differences (p˃0.05) among the values of weight, specific growth rate and percentage weight gain of C. gariepinus. There were no significant differences (p˃0.05) among the mean values of feed conversion ratio of fish fed with the respective feeds in the indoor hatchery. This study, therefore, indicated that Le-Gouessant would be best converted in outdoor hatcheries while any of the feeds could be used in indoor hatcheries. The length-weight relationship and condition factor of fish fed in the respective hatcheries were also calculated, Log W = 0.0125 + 2.8460 log L and log W = 0.0708 + 2.6147 log L for Le-Gouessant; Log W = 0.0536 + 2.6023 log L and log W = 0.0533 + 2.7933 log L for Coppens; and Log W = 0.0744 + 2.510 log L and Log W = 0.1031 + 2.5230 log L for multi-feed. The fish exhibited negative allometric growth patterns when values of b were less than 3.
Keywords: Catfish, Clarias gariepinus, condition factor, feed utilisation, growth,
Contact Address: Muhammed Oyinlola, University of Bremen, International Study in Aquatic Tropical Ecology, Spittaler Str 1a 2.11, Bremen, Germany, e-mail: honeymuhyahoo.com