Growth of Nile tilapia post-larvae from broodstock fed diet with different levels of digestible protein and digestible energy

Abstract

-This study was carried out to evaluate the influence of different levels of digestible energy and digestible protein in diets of Nile tilapia (Oreochromis niloticus) broodstock on offspring growth during sex reversal stage. A total of 2,700 post-larvae (8.2±0.001 mg) derived from breeders fed nine diets with distinct levels of digestible protein (28, 34 and 40% DP) and digestible energy (2,800; 3,400; and 4,000 kcal DE.kg -1 ) were stored in twenty-seven 70 L tanks. After 30 days of growth, their average final weight (AFW, g), average weight gain (AWG, g), final standard length (SL, cm), condition factor (CF), specific growth rate (SGR, %/day), stock uniformity (UNI, %), survival (SUR, %) and sex reversal rate (SRR, %) were measured. Although female nutrition is thought to influence the performance or quality of progeny during early life stages, no influence of diets supplied to broodstock was detected on any parameter. Nonetheless, the offspring presented commercially satisfactory growth rates. Thus, diets containing 28% of digestible protein and 2,800 kcal of digestible energy.kg of diet -1 can be used to feed Nile tilapia broodstock without jeopardizing offspring performance during the sex reversal phase.

Incorporation of garlic meal (Allium sativum) as natural additive to enhance performance, immunity, gonad and larval survival of Nile tilapia (Oreochromis niloticus) broodstock

“…The enhancement in structure deformation of testes and ovary by addition 2% garlic powder were cleared. This findings were agree with using other plants as feed carica papaya seed meal in Nile tilapiaAbdelhaket al, 2013 andSolomon andOkomoda,2012).…”

First trial of production of a native cichlid Herichthys cyanoguttatus comparison with the tilapia Oreochromis niloticus in aquaculture

“…The Krel of tilapia obtained from the standard length (Fig. 2) is equivalent to that found in other studies with an accepted production (Gupta et al, 2012;Sousa et al, 2013). Moreover the native cichlid showed a similar statistical trend (P > 0.05), considering that both species are in good condition because values obtained are close to 1, maintaining its condition factor during the entire experimental period (Olurin & Aderibigbe, 2006).…”

Reproductive performance of female Nile tilapia ( Oreochromis niloticus ) fed diets with different digestible energy levels

“…The nutrition of broodstock may influence the quality of the offspring because the nutrients of the diets of females are incorporated into the eggs during vitellogenesis and will therefore be reflected in the quality of the post-larvae. However, according to Sousa et al (2013), little is known about the effect of maternal diet regarding the performance of the progeny after the end of the vitelline reserves. The same authors assessed the development of post-larvae in the sexual reversion phase to observe the effect of different levels of DE and protein in the maternal diet up to 30 days of development and did not find significant effects on post-larval survival and growth.…”