GROWTH PERFORMANCE, FEED UTILIZATION AND CARCASS COMPOSITION COMPARISONS OF MONOSEX TILAPIA (Oreochromis niloticus) PRODUCED BY VARIOUS TECHNIQUES. | ||
| Journal of Animal and Poultry Production | ||
| Article 5, Volume 29, Issue 8, August 2004, Pages 4461-4471 PDF (3.11 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jappmu.2004.239409 | ||
| Author | ||
| M. A. Zaki, | ||
| Animal and Fish production Dept., Faculty of Agriculture, Alexandria University, Alexandria, Egypt. | ||
| Abstract | ||
| The present study was conducted to compare growth, feed utilization and carcass composition (Oreochromis niloficus) monosex, produced through separation of sexes (male or female) and hormonal sex reversal techniques with (0,20,40,60 and 80 %) female replacements. Glass aquaria belonging to in Animal and Fish Production Department, Faculty of Agriculture, Alexandria University are use. The results indicated that: 1) the most rapidly growing fish fry or fingerlings were methyltestisterone- hormone (MTH) treated, sex reversed Nile tilapia. While normal male (NM) and normal female (NF) Nile tilapia produced by separation of sexes came second and third, respectively, however mixed sex tilapia grew at the lowest rate; 2) the higher values of condition factor and feed utilization parameters were also highest in sex reversed tilapia, and lowest in mixed sex tilapia; and 3) fat and energy contents of hormonal sex reversed tilapia carcass were highest, while the differences between sex reversed tilapia, separation of sexes and mixed sex tilapia groups for carcass crude protein and dry matter contents were insignificant. | ||
| Keywords | ||
| Growth; monosex; separation; sex reversal | ||
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