Advances in tropical aquaculture

If warmwater finfish protein requirements as level in diet is low, absolute intake per day is similar to those of coldwater species. But relation to this requirement with specific growth rate differs for strictly warmwater fishes as tilapia. Analysis of partition between protein and non-protein energy provided and consequently improve their protein retention. Better carbohydrate digestibility and metabolism are propunded as part of the exploration. (Résumé d'auteur

Advances in tropical aquaculture

#Hoplosternum littorale$ is a siluriform fish of very high commercial value in some country of South America. Some biological characteristics as easy spawning in confinement and good tolerance of low oxygen level make it easy to cultivate. Aquatic oxygen uptake does not allow to sustain standard metabolism, so it is considered as an obligated air breather. Routine metabolism and growth cannot be completed without air access. A circadian rythm for feeding behaviour is observed. Most voluntary food intake occur during the night. The sunset is a directive factor even in case of time lag. So, a night feeding schedule should bbe used in practise. (D'après résumé d'auteur