EFFECT OF STOCKING DENSITY, PHOTOPERIOD AND FEEDING ON POULTRY EGG ON GROWTH AND DEVELOPMENT OF THE EGYPTIAN SOLE (SOLEA AEGYPTIACA CHABANAUD, 1927) LARVAE.
Safaa S.A. Aljilany1; Ragab A. Mohammed1; Hamed H.E. Saleh1*; Sobhy M. Allam2 and Ramadan M. Abou-Zied2
1National Institute of Oceanography and Fisheries (NIOF), Egypt.
2Animal Production Department, Faculty of Agriculture, Fayoum University, Egypt.
*Corresponding author: E-mail: [email protected]
|Received 17/ 2/ 2016||
Accepted 5/ 4/ 2016
This study was conducted to evaluate the optimum stocking density, photoperiod and
feeding on poultry egg
on growth and
development of Solea aegyptiaca larvae. The first experiment was tested four different stocking densities (50, 80, 110 and 140 larvae/ liter). The results found that, no significant difference in growth performance. Stocking density of 110 larvae/liter led to relatively higher survival rate compared to the other stocking densities. The second experiment was tested four different photoperiods (light, L: dark, D): 6L: 18D, 12L: 12D, 18L:6D and 24L:0D). The results indicated that, the best growth performance of larvae was at photoperiods 18L:6D and 24L:0D. Larvae exposed to photoperiods (12L:12D, 18L:6D and 24L:0D) led to relatively higher survival rate compared to 6L:18D. The third experiment was tested five different feeds type (live food (Rotifer and Artemia) and poultry egg (whole egg, egg white, egg yolk and boiled egg yolk)). The results indicated that, larvae that fed on live food (Rotifer and Artemia) showed statistically higher growth rate compared to all the other groups. It had showed the slow growth of larvae that were fed on poultry
egg. Survival rate values were relatively high with fed on egg white and fed on live food.
Keywords: Stocking density, photoperiod, poultry egg, development, growth performance, survival rate, Solea aegyptiaca