Do individual Activity Patterns of Brown Trout (Salmo trutta) alter the Exposure to Parasitic Freshwater Pearl Mussel (Margaritifera margaritifera) Larvae?
| Autor: | Libor Závorka, Fredrik Wahlqvist, Joacim Näslund, Johan Höjesjö, David Aldvén, Martin Österling, Niklas Wengström |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Gill animal structures biology 010604 marine biology & hydrobiology Zoology Aquatic animal biology.organism_classification 010603 evolutionary biology 01 natural sciences Fishery Brown trout Trout Freshwater pearl mussel Animal Science and Zoology Salmo Ecology Evolution Behavior and Systematics Margaritifera Shellfish |
| Zdroj: | Ethology. 122:769-778 |
| ISSN: | 0179-1613 |
| DOI: | 10.1111/eth.12524 |
| Popis: | The hypothesis that interindividual differences in the activity of brown trout alter the exposure to parasitic freshwater pearl mussel glochidia was tested in a Swedish stream. Wild yearling brown trout (N = 103) were caught, individually tagged for identification and scored for open-field activity during standardized laboratory tests in June. Fifty gravid freshwater pearl mussels were relocated to the stream, where after the trout were released back into the stream. The fish were recaptured in October (N = 35), checked for glochidia encystment (infested individuals: n = 6) and re-scored for open-field activity traits. Swimming velocity during the test was higher in fish infected with glochidia, suggesting that high activity could increase their exposure to glochidia. Potentially, as metabolism rate and ventilation rate typically increase with activity, elevated activity may lead to an increased likelihood of glochidia passing over the gills. This novel finding suggests that glochidia infestation is non-random and that the behaviour of the host fish can influence the likelihood of glochidia infestation. |
| Databáze: | OpenAIRE |
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