Spatial and temporal variability in the stomach content of herring and sprat in the Bornholm Basin

Schaber, Matthias, Möllmann, Christian and Köster, Friedrich W. (2001) Spatial and temporal variability in the stomach content of herring and sprat in the Bornholm Basin [Paper] In: ICES Council Meeting 2001, 26.-29.09.2001, Oslo, Norway.

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Herring and sprat stomachs and zooplankton samples were collected on 8 sites in the Bornholm Basin in May/June 1999 at different times of the day. Sprat showed a distinct increase in stomach content from early morning to the afternoon, whereas the stomach content of herring remained rather constant. Both herring and sprat showed a clear dominance of mesozooplankton in food composition with only small contributions of makrozooplankton and ichthyo-plankton. Both clupeid species showed similar preferences in selection of food items with a dominance of the copepods P. elongatus and T. longicornis. Compared to herring, other copepod species, especially Acartia spp. contributed to a larger extent to the food of sprat. Cladocerans played a less important role as food for both species. Spatial differences in stomach content have been revealed between the sampling sites. These resulted from differences in the distribution of food organisms in the water column as well as a different vertical distribution of the predators at different times of day. The share of juvenile copepods in herring stomachs was bigger than in sprat stomachs. Generally, selective feeding seemed to be stronger developed in sprat than in herring.

Document Type: Conference or Workshop Item (Paper)
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EV Marine Evolutionary Ecology
OceanRep > Institute for Marine Science Kiel
Refereed: No
Date Deposited: 18 Feb 2008 17:25
Last Modified: 24 Apr 2020 08:04

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