De Silva, Sena S. <br/><br/>
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 

 - Amsterdam,  Elsevier Science,  1984, 
 - 345-358p. 
 - Aquaculture  ; Vol.41 .
<br/><br/> 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.<br/>