Vulnerability of melanic Daphnia to brown trout predation
dc.contributor.author | Sægrov, Harald | |
dc.contributor.author | Hobæk, Anders | |
dc.contributor.author | L’Abée-Lund, Jan Henning | |
dc.coverage.spatial | Norway | en_US |
dc.date.accessioned | 2021-04-21T06:55:03Z | |
dc.date.available | 2021-04-21T06:55:03Z | |
dc.date.issued | 1996 | |
dc.identifier.uri | https://hdl.handle.net/11250/2738745 | |
dc.description.abstract | The coexistence of melanic Daphnia cf. longispina and facultatively planktivorous brown trout is reported from a clear-water, alpine lake. This co-occurrence is uncommon, presumably due to the vulnerability of pigmented Daphnia to fish predation. Lake Bjornesfjorden (Norway) provided an opportunity to test this assumption. About 20% of the fish caught in gill nets had fed on Daphnia. The trout exerted a marked selection for large-sized Daphnia prey, and a very strong selection for pigmented individuals relative to transparent ones. The persistence of a pigmented Daphnia population probably relies on limited recruitment and a low stock of the predator, and the availability of more favourable benthic prey organisms. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Oxford university press | en_US |
dc.title | Vulnerability of melanic Daphnia to brown trout predation | en_US |
dc.type | Journal article | en_US |
dc.source.pagenumber | 2113-2118 | en_US |
dc.source.volume | 18 | en_US |
dc.source.journal | Journal of Plankton Research | en_US |
dc.source.issue | 11 | en_US |
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