Diel vertical migration and feeding by krill Meganyctiphanes norvegica ...

• Main Author: Dawdry, Nicola Elizabeth
• Format: Text
• Language: English
• Published: University of Plymouth 2004
• Subjects: Meganyctiphanes norvegica; Northern krill
• Online Access: https://dx.doi.org/10.24382/4423; https://pearl.plymouth.ac.uk/bms-theses/251

Merged with duplicate record 10026.1/728 on 08.20.2017 by CS (TIS) ... : The diel vertical migration (DVM) of zooplankton has been extensively studied and reviewed. Yet the controlling mechanisms for DVM are still uncertain, although several hypotheses, e.g. predator evasion, hunger - satiation, light avoidance, have been proposed. This is particularly so for krill. An important part of understanding krill DVM depends on explaining the factors which drive krill to the surface waters at night. lt is frequently speculated that krill migrate to the surface layers to feed. Although there is a vast literature on krill feeding (and the pattern of krill DVM) there has been little attempt to establish the role of feeding in DVM. Consequently, the main aims of this thesis were to further explore the mechanisms for krill DVM and also to explain the feeding strategy of krill in order to understand the role of feeding in DVM, using Northern krill Meganyctiphanes norvegica as a model system. These aims were achieved by examining the following: whether krill are selective feeders and also ...