Troubled by the humics — effects of water colour and interspecific competition on the feeding efficiency of planktivorous perch
Tit humic lakes in addition to various density-dependent interactions, dark water may be partly causing a bottleneck in perch (Perca fiuviatilis) growth. This study focuses on clarifying the role of water colour and increasing fish density on the plankton feeding efficiency of perch. Both aquarium e...
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| Veröffentlicht in: | Boreal environment research 2012-06, Vol.17 (3-4), p.305-312 |
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| creator | ESTLANDER, Satu HORPPILA, Jukka OLIN, Mikko VINNI, Mika LEHTONEN, Hannu RASK, Martti NURMINEN, Leena |
| description | Tit humic lakes in addition to various density-dependent interactions, dark water may be partly causing a bottleneck in perch (Perca fiuviatilis) growth. This study focuses on clarifying the role of water colour and increasing fish density on the plankton feeding efficiency of perch. Both aquarium experiments and field data were used in this study. In the experiments, perch fed clearly less in highly humic wateT than in clear water, but the presence of roach had no significant effect on the feeding efficiency of perch. According to the field data, water colour had a significant effect on the length at which perch shifted from feeding primary on plankton to other food sources. |
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| subjects | Animal and plant ecology Animal, plant and microbial ecology Biological and medical sciences Chemical properties Earth sciences Earth, ocean, space Environmental aspects Exact sciences and technology Fundamental and applied biological sciences. Psychology General aspects Humic acid Marine and continental quaternary Pike Surficial geology Synecology Water chemistry |
| title | Troubled by the humics — effects of water colour and interspecific competition on the feeding efficiency of planktivorous perch |
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