The Influence of Stocking Density and food Ration on fry Survival and Growth in Oreochromis Mossamicus and O. Niloticus Female X O. Aureus Male Hybrids Reared in a Closed Circulated System
By: De Silva, Sena S
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Contributor(s): Macintosh, D.J.
Series: Aquaculture; Vol.41. Publisher: Amsterdam, Elsevier Science, 1984Description: 345-358p.Summary: First-feeding stage tilapia fry were reared for 40 or 50 days in 20-1 capacity aquaria at six stocking densities (2, 4, 6, 8, 10, 12 l ' 1) and three feeding levels (6, 12, 24% of body weight daily). Fry survival and growth were improved at the higher feeding levels, but the percentage of fry surviving showed no consistent relationship to stocking density. Cannibalism accounted for a mortality rate of 10—35% in each experimental group and was inversely related to the level of feeding. Under equivalent conditions, O. niloticus female X O. aureus male fry had a higher rate of survival, better food conversion and were more uniform in size than O. mossambicus fry.
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Research Papers
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Ready Reference | RP0207 | Available |
First-feeding stage tilapia fry were reared for 40 or 50 days in 20-1 capacity aquaria at six stocking densities (2, 4, 6, 8, 10, 12 l ' 1) and three feeding levels (6, 12, 24% of body weight daily). Fry survival and growth were improved at the higher feeding levels, but the percentage of fry surviving showed no consistent relationship to stocking density. Cannibalism accounted for a mortality rate of 10—35% in each experimental group and was inversely related to the level of feeding. Under equivalent conditions, O. niloticus female X O. aureus male fry had a higher rate of survival, better food conversion and were more uniform in size than O. mossambicus fry.
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