SOBRE A ALIMENTAÇÃO DE LARVAS DO CAMARÃO DE ÁGUA DOCE Macrobrachium rosembergii

Abstract

The hatchery of Macrobrachium rosenbergii is a successful activity that supports freshwater prawn farming operations worldwide, although feeding schedules require improvement. As M. rosenbergii is assumed to forage at night, Artemia nauplii (AN) are normally offered in the afternoon or at night. However, at present, there is neither consensus on the optimum schedule nor the amount of nauplii that should be provided daily during the larval phase. In the present study, two aspects of the provisioning of the M. rosenbergii larvae were tested experimentally – (i) the timing of the presentation of the Artemia nauplii (08:00 h and 20:00 h), and (ii) the density of the nauplii (5, 10, 20 AN mL-1). The results showed that M. rosenbergii larvae feed Artemia nauplii preferentially during the daylight hours, and that provisioning during this period supports a 25% increase in productivity. The results also showed that it is unnecessary to provide Artemia nauplii at a density up to 5 Na mL-1, not exceeding 10 AN mL-1.

FOOD ACCEPTANCE IN DIFFERENT LARVAL STAGES OF <i>Macrobrachium carcinus</i>

“…Knowledge of feeding behavior is necessary to determine appropriate food management for a particular organism (Loya-Javellana, 1989;Sorgeloos and Léger, 1992;Lavens and Sorgeloos, 2000;Aviz et al, 2018). The larvae of M. carcinus are small and extremely fragile during early developmental stages when they are passing through various phases with quite different morphological characteristics.…”