Vertical migration and feeding of Euphausia lucens (Euphausiacea) in the Southern Benguela

Abstract

Diel migration and feeding were examined for populations of Euphausia lucens living in the near- and offshore waters of the southern Benguela. Euphausiids at both stations displayed nocturnal diel vertical migration patterns. Animals inshore ascended in a slow-fast-slow manner which seems to be related to differential food concentrations throughout the water column Pronounced quantitative and qualitative changes in the diet of E.lucens were observed offshore but not inshore. These differences are discussed in relation to different ambient food environments © 1991 Oxford University Press