Viabilidad y crecimiento de poblaciones diploides y triploides de tilapia nilotica, oreochromis niloticus, línea Ghana

Abstract

The principal aim of this research was to produce triploid offspring of O. niloticus, applying warm thermic shocks (41A-42 oC) to eggs during 3,5-4 min., 3,5 mino after fertilization, or cold shocks (10,8-11,3 oC) to oocytes during one hour, 5 min after their fertilization. The best tissue to confirm triploids was kidney and brain of larvae and alevines. Then, the survival of fertilized eggs and growth rate were determined. The results show that the warm and cold shocks are efficient to produce 100% triploids, with different rates of survival. Also, that 25,5% oftspring was deformed when cold shocks were applyed, and 32,5% deformities with warm shocks. There were not significant difterences in growth between triploid and diploid populations after three months of age.

Keywords

• crecimiento poblaciones
• oreochromis
• triploidía
• piscicultura