Effects of predation from juvenile herring on mortality rates of capelin larvae in the Barents Sea ...

• Main Authors: Hallfredsson, Elvar H., Pedersen, Torstein
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: ASC 2004 - DD - Theme session 2024
• Subjects: Fisheries and aquaculture; Ecosystem observation, processes and dynamics; Barents Sea; Calanus finmarchicus
• Online Access: https://dx.doi.org/10.17895/ices.pub.25349194.v1; https://ices-library.figshare.com/articles/conference_contribution/Effects_of_predation_from_juvenile_herring_on_mortality_rates_of_capelin_larvae_in_the_Barents_Sea/25349194/1

No abstracts are to be cited without prior reference to the author.In this study, we examine whether predation from juvenile herring has a significant effect on mortality rates of capelin larvae in the Barents Sea, which in turn might affect the year class strength in the capelin stock. Surveys were carried out in summer 2001, 2002, 2003 and 2004. Juvenile herring were sampled by pelagic trawl, and a Gulf III was used to sample capelin larvae and other zooplankton. Hydrographical and acoustic data were also collected. The stomach contents of herring and the zooplankton samples were dominated by Calanus finmarchicus and euphausiids. Capelin larvae with lengths in the range 7-25 mm dominated the ichthyoplankton. In 2001, juvenile herring were widely distributed and overlapped with capelin larvae over a wide area. At 11 of 24 stations where herring was caught, capelin larvae were observed in the herring stomachs. Average frequency of occurrence for capelin larvae was 7% (n = 612 herring stomachs). In 2002 and ...