Schooling of the vertically migrating mesopelagic fish Maurolicus muelleri in light summer nights

Abstract

Vertically migrating Maurolicus mueUerj arrested periods at subsurface depths (Giske et al. 1990, Giske their nocturnal ascent below the peak zooplankton concen-~k~~~~ 1992, ~~l i f i ~ & ~k~~~~ 1993, ~~~d~~~ et trations during light summer nights at 62"N. At 6g0N, the behavior was further modified, with M. muelleri forming 1995, Torgersen et al. 1997).