Do individual activity patterns of brown trout (Salmo trutta) alter the exposure to parasitic freshwater pearl mussel (Margaritifera margaritifera) larvae?
2016 (English)In: Ethology, ISSN 0179-1613, E-ISSN 1439-0310, Vol. 122, no 9, 769-778 p.Article in journal (Refereed) Published
The hypothesis that inter-individual 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 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 behavior of the host fish can influence the likelihood of glochidia infestation.
Place, publisher, year, edition, pages
Wiley-Blackwell, 2016. Vol. 122, no 9, 769-778 p.
glochidia; parasites; animal personality; mussel conservation; reintroduction; behavioural repeatability
Research subject Biology
IdentifiersURN: urn:nbn:se:kau:diva-46149DOI: 10.1111/eth.12524ISI: 000380914100008OAI: oai:DiVA.org:kau-46149DiVA: diva2:971203