REPRODUCTIVE PERFORMANCE OF NILE TILAPIA (OREOCHROMIS NILOTICUS) AT DIFFERENT LEVELS OF WATER TEMPERATURE AND REARING OF FRY AT DIFFERENT STOCKING DENSITIES | ||
| Egyptian Journal of Agricultural Research | ||
| Article 20, Volume 84, Issue 1, January 2006, Pages 203-211 PDF (390.05 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejar.2006.230015 | ||
| Author | ||
| AHMED M. KHATER | ||
| Central Laboratory for Aquaculture Research, Agricultural Research Center, Ministry of Agriculture, Dokki, Giza, Egypt | ||
| Abstract | ||
| The present study includes natural spawning of Nile tilapia (Oreochromis niloticus) under different levels of water temperature and rearing of fry at different stocking densities of Nile tilapia (Oreochromis &atlas.). The study indicated that there are significant differences between different levels of water temperature 22 °C — 25 °C , 26 —31 °C and 34 — 37 °C for number of fry per female and number of fry per (gm) of female body weight of Oreochromis niloticus Also, the results indicated that there were a significant difference in rearing of fry at different stocking rates 300 fry / m3, 150 fry / m3 and 75 fry / m3, for growth parameters. The survival rate showed no significant differences between stocking rates 300 fry / m3 and 150 fry / m3, while, there was a significant different between them and stocking density 75 fry / m3. It was concluded that the water temperature 26 — 31°C is the best for reproductive performance and growth. Also, stocking density 75 fry / m3 was the best result for growth of Nile tilapia than nthpr stnrkina densirv. | ||
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