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dc.contributor.authorSalonen, Jouni
dc.contributor.authorTaskinen, Jouni
dc.date.accessioned2017-12-05T08:36:16Z
dc.date.available2017-12-05T08:36:16Z
dc.date.issued2017
dc.identifier.citationSalonen, J., & Taskinen, J. (2017). Electrofishing as a new method to search for unknown populations of the endangered freshwater pearl mussel Margaritifera margaritifera. <i>Aquatic Conservation: Marine and Freshwater Ecosystems</i>, <i>27</i>(1), 115-127. <a href="https://doi.org/10.1002/aqc.2667" target="_blank">https://doi.org/10.1002/aqc.2667</a>
dc.identifier.otherCONVID_26169452
dc.identifier.otherTUTKAID_70932
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/56133
dc.description.abstract1. The freshwater pearl mussel Margaritifera margaritifera is threatened throughout its Holarctic range, but the occurrence of this species is insufficiently mapped. For the conservation of M. margaritifera, it is important to identify populations more comprehensively. 2. Traditionally mussels have been searched for visually using techniques such as diving and aquascope, both of which are potentially time-consuming and demanding survey methods. 3. In this study, a new search method is presented. As glochidia of M. margaritifera are larval parasites on gills of salmonid fish, electrofishing and non-destructive examination of salmonids with the naked eye may reveal the presence of glochidia and therefore the occurrence of M. margaritifera in watercourses. This method was tested in both the field and laboratory in northern Finland. 4. In summer, when M. margaritifera glochidia were large, the status of salmonids being infected or uninfected by M. margaritifera was correctly identified with the naked eye with 62, 80, 88 and 93 % accuracy in four streams sampled, 96 % accuracy in the laboratory, and 100 % accuracy in all cases when at least 20 glochidia per fish were present. Intensity of infection was also assessed successfully; a specifically tailored, qualitative abundance score correlated significantly with the real number of glochidia. However, during autumn with small glochidia freshly attached to fish, glochidia infection could be observed only under microscopic examination. 5. When the method was used in 40 previously incompletely surveyed tributaries, three M. margaritifera populations were found. The infection in salmonids was observed always with the naked eye, being subsequently confirmed microscopically. The existence of adult mussels in two of these rivers was also confirmed. 6. The results indicate that electrofishing and a relatively quick naked-eye check of salmonids provides a new, non-destructive, and potentially cost-effective way to search for new, previously unrecorded M. margaritifera populations.
dc.language.isoeng
dc.publisherJohn Wiley & Sons Ltd.
dc.relation.ispartofseriesAquatic Conservation: Marine and Freshwater Ecosystems
dc.subject.otherbrown trout
dc.subject.otherfreshwater pearl mussel
dc.subject.otherglochidia
dc.subject.otheroccurrence
dc.subject.otherriver
dc.titleElectrofishing as a new method to search for unknown populations of the endangered freshwater pearl mussel Margaritifera margaritifera
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201712054484
dc.contributor.laitosBio- ja ympäristötieteiden laitosfi
dc.contributor.laitosDepartment of Biological and Environmental Scienceen
dc.contributor.oppiaineAkvaattiset tieteetfi
dc.contributor.oppiaineAquatic Sciencesen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2017-12-05T07:15:14Z
dc.type.coarhttp://purl.org/coar/resource_type/c_2df8fbb1
dc.description.reviewstatuspeerReviewed
dc.format.pagerange115-127
dc.relation.issn1052-7613
dc.relation.numberinseries1
dc.relation.volume27
dc.type.versionacceptedVersion
dc.rights.copyright© 2016 John Wiley & Sons, Ltd. This is a final draft version of an article whose final and definitive form has been published by Wiley. Published in this repository with the kind permission of the publisher.
dc.rights.accesslevelopenAccessfi
dc.subject.ysolevinneisyys
dc.subject.ysosähkökalastus
dc.subject.ysouhanalaiset lajit
jyx.subject.urihttp://www.yso.fi/onto/yso/p7415
jyx.subject.urihttp://www.yso.fi/onto/yso/p4236
jyx.subject.urihttp://www.yso.fi/onto/yso/p11643
dc.relation.doi10.1002/aqc.2667
dc.type.okmA1


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