Foraging Bryde’s whales need to forage frequently to satisfy their daily consumption needs (Best et al. 1984); therefore, they are unlikely to remain in one place for long periods of time (entire seasons) if their prey is on the move. This notion is supported here by the fact that encounter rate varied more between months than seasons. Prey dynamics (abundance and availability) have been shown to affect the behaviour, seasonality and abundance of Bryde’s whales in coastal waters off south-east and southern Brazil, Venezuela and the Gulf of California (Notarbartolo di Sciara 1983, Tershy 1992, Zerbini et al. 1997).