“…light, food, tides), and hypotheses that attempt to explain, the DVM behavior of fish (e.g. bioenergetic advantage, predation avoidance, optimization of different functions) (Neilson & Perry 2001). The visual stimulus required for the maintenance of schools (Blaxter & Hunter 1982, Fréon & Misund 1999, Bertrand et al 2008) is reduced in the period before sunset when light is diminishing.…”