Greener Journal of Biological Sciences Vol. 3 (3), pp. 123-126, April 2013.
© 2011 Greener Journals
Manuscript Number: 102012124
Aspects of the Reproductive Biology ofTilapia Guineensis (Bleeker, 1862) Under Laboratory Conditions
R. I. Keremah1* and A. P. Ndah2
1Department of Fisheries and Livestock Production Technology, Niger Delta University, Wilberforce Island, Bayelsa State, Nigeria
2Department of Fisheries and Aquatic Environment, Rivers State University of Science and Technology, Port Harcourt, Nigeria
*Corresponding Author’s E-mail:regreggie55 @yahoo. com
Aspects of the reproductive biology of Tilapia guineensis was carried out in the laboratory. Twelve ripe male and female brooders of T. guineensis (body length, 12.2 - 12.9cm and weight, 100 – 130g) paired 1@: in triplicate were made to spawn naturally in glass aquaria (60 x 30 x 30cm3). Results show mean fecundity to be 1,269 eggs per female spawner with mean egg size of 1.48mm. Hatching of eggs started 47-48hours after fertilization at a mean temperature of 27.40C. Percent hatch was 74.8% and length of hatchling as 3.8mm. Time of yolk sac absorption was observed to be 4 days with swim-up fry length, 5.7mm and weight, 1.67mg. Parental care was prominently displayed by both parents.
Keywords: Tilapia guineensis, reproduction, aquaria, brackish water.