PERFORMANCE OF LOCALLY FORMULATED FEEDS FOR REARING OF AFRICAN CATFISH IN TANZANIA
Fisheries is an important food production sub-sector, providing almost 20% of the world's protein supply; however, the trend in fish production from capture fisheries has reached its limits due to overfishing. A study was conducted to evaluate the performance of two locally formulated feeds as...
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Veröffentlicht in: | African crop science journal 2014-12, Vol.22 |
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Sprache: | eng |
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Zusammenfassung: | Fisheries is an important food production sub-sector, providing almost
20% of the world's protein supply; however, the trend in fish
production from capture fisheries has reached its limits due to
overfishing. A study was conducted to evaluate the performance of two
locally formulated feeds as possible replacements for an imported
costly commercial feed (CMF) commonly used in rearing of African
catfish ( Clarias gariepinus Burchell) in Tanzania. Two feed types,
namely TAF 1 and TAF 2, denoting TAFIRI feed type 1 and 2 were
formulated from fish meal ( Rastrineobola argentea ) and soybean (
Glycine max L.), respectively. Nine concrete tanks of 12 m3 each were
stocked with 320 catfish fry each, and fed with formulated feeds at 5%
of their mean body weight for four months. Water in the tanks was
wholly flushed out on a weekly basis and fish sorted for the fast
growers to reduce cannibalism. On a monthly basis, fish were randomly
sampled for body length and weight. The mean values for temperature,
dissolved oxygen and pH ranged from 21.62±0.04 to 25.16±0.05
°C, 5.43±0.05 to 5.7±0.07 mg O2 L-1, and 6.5±0.05
to 6.61±0.03, respectively. Feed TAF 1 was the best performer with
weight gain of 33.72±0.89, average daily gain of 0.28±0.01,
FCR of 1.35±0.05 and specific growth rate of 4.61±0.04. Fish
fed on the commercial feed performed the poorest, with weight gain of
6.17±4.8, average daily gain of 0.05±0.004, FCR of
1.56±0.11 and specific growth rate of 2.98±0.05. Results from
this study suggest that locally formulated feeds can cost effectively
be used for the rearing of African catfish in Tanzania.
La pêche et l'aquaculture constituent un sous secteur
important de production alimentaire, fournissant environ 20% des
besoins en protéines mondiales ; par ailleurs, la tendance de
la production des poissons à partir de la pêche dans les lacs
et les océans a atteint ses limites par suite d'une trop
forte pression sur les resources halieutiques. Une étude
était menée pour évaluer la performance de deux aliments
locaux formulés afin de remplacer les aliments commerciaux
chèrement importés couramment utilisés dans la nutrition
des poissons ( Clarias gariepinus Burchell) en Tanzanie. Deux types
d'aliments TAF 1 et TAF 2, aussi appelés aliments TAFIRI
type 1 et 2 étaient formulés à partir des aliments de
poissons ( Rastrineobola argentea ) et du soja ( Glycine max L.),
respectivement. Neuf réservoirs de 12 m3 chacun étaient
approvisionnés chacun avec 320 clarias, et nourris av |
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ISSN: | 1021-9730 |