Schooling mackerel and herring choose neighbours of similar size |
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| Authors: | T J Pitcher A E Magurran J I Edwards |
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| Institution: | (1) School of Animal Biology, University College of North Wales, LL57 2UW Bangor, Gwynedd, UK;(2) Department of Agriculture and Fisheries for Scotland Marine Laboratory, Victoria Road, P.O. Box 101, AB9 8DB Aberdeen, UK |
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| Abstract: | Fish schooling in a submerged sea-cage swam next to neighbours of similar size. Between 57 and 74 fish were used. Extensive three-dimensional data showed the neighbour size effect for two different species, herring and mackerel, during both day and night. These experiments, covering sizes which coexist in the wild, are the first demonstration of the neighbour size choice in fish schools predicted by theories of hydrodynamic advantage. |
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