Long-term changes in the diel vertical migration behaviour of Calanus finmarchicus in the North Sea are unrelated to fish predation

Andrew G. Hirst^1,*, Sonia D. Batten²

¹George Deacon Division, Southampton Oceanography Centre, Empress Dock, Southampton SO14 3ZH, United Kingdom
²Sir Alister Hardy Foundation for Ocean Science, Citadel Hill, Plymouth PL1 2PB, United Kingdom