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Relationship of biotic and abiotic factors to recruitment patterns in Margaritifera margaritifera
Karlstad University, Faculty of Social and Life Sciences, Department of Biology.ORCID iD: 0000-0001-6758-5857
Karlstad University, Faculty of Social and Life Sciences, Department of Biology.ORCID iD: 0000-0002-3191-7140
Karlstad University, Faculty of Social and Life Sciences, Department of Biology. (Biologi)ORCID iD: 0000-0002-4647-088X
2008 (English)In: Biological Conservation, ISSN 0006-3207, E-ISSN 1873-2917, Vol. 141, no 5, p. 1365-1370Article in journal (Refereed) Published
Abstract [en]

We investigated relationships of biotic and abiotic factors to recruitment patterns of the endangered freshwater pearl mussel (Margaritifera margaritifera) in 10 Swedish streams. We found that the maximum proportion of gravid mussels did not differ between streams with and without recent recruitment. Moreover, the mean glochidial load on trout (Salmo trutta), which was positively related to adult mussel density, did not differ significantly between these stream types. Thus, the larval stages of the freshwater pearl mussel were not related to recruitment failure. Instead, recruitment is probably hindered at the next stage in the life history of the mussels, the benthic stage, and may be related to sedimentation as turbidity was four times greater in streams lacking recent recruitment than in streams with recent recruitment. Furthermore, we found that juvenile mussel density was positively related to the number of glochidial infections per stream area in streams with ongoing recruitment, indicating that successful recruitment in these streams may depend on both mussel and trout density. Future research should thus examine biotic interactions between mussels and trout as well as the effects of sedimentation on benthic-living mussels.

Place, publisher, year, edition, pages
Elsevier, 2008. Vol. 141, no 5, p. 1365-1370
Keywords [en]
Parasite, Host, Margaritifera, Glochidia larvae, Salmo trutta, Turbidity
National Category
Biological Sciences
Research subject
Biology
Identifiers
URN: urn:nbn:se:kau:diva-15793DOI: 10.1016/j.biocon.2008.03.004OAI: oai:DiVA.org:kau-15793DiVA, id: diva2:572115
Available from: 2012-11-26 Created: 2012-11-26 Last updated: 2017-12-07Bibliographically approved

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Österling, MartinGreenberg, LarryArvidsson, Björn L

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