Local site differences in survival and parasitism of periwinkles (Littorina sitkana Philippi, 1846)

dc.contributor.authorAyala-Díaz, Mónica
dc.contributor.authorRichardson, Jean M. L.
dc.contributor.authorAnholt, Bradley R.
dc.date.accessioned2018-07-30T15:47:36Z
dc.date.available2018-07-30T15:47:36Z
dc.date.copyright2017en_US
dc.date.issued2017
dc.description.abstractThe periwinkle, Littorina sitkana, is found throughout the intertidal zone, often in isolated subpopulations. The majority of trematode parasites use snails as intermediate hosts, and decreased survivorship is often observed in snails infected with trematodes. Sampling L.sitkana from four sites in Barkley Sound, British Columbia, Canada, we test the effects of parasitic infection on snail survival using maximum likelihood and Bayesian approaches using the software MARK and WinBUGS. We found that survival of periwinkles and trematode community composition differed among sites, but survival and trematode prevalence were uncorrelated. WinBUGS performed better than MARK in two ways: (1) by allowing the use of information on known mortality, thus preventing survival overestimation; and (2) by giving more stable estimates while testing the effect of body size on snail survival. Our results suggest that snail survival depends heavily on local environmental factors that may vary greatly within a small geographical region. These findings are important because the majority of experimental studies on survival are done on snails from a single location.en_US
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.description.sponsorshipNatural Sciences and Engineering Research Council of Canada (NSERC); Canada Research Chairs (CRC); Bamfield Marine Sciences Centre.en_US
dc.identifier.citationAyala-Díaz, M.; Richardson, J. M. L.; & Anholt, B. R. (2017). Local site differences in survival and parasitism of periwinkles (Littorina sitkana Philippi, 1846). Ecology and Evolution, 7(4), 1021-1029. https://doi.org/10.1002/ece3.2708en_US
dc.identifier.urihttps://doi.org/10.1002/ece3.2708
dc.identifier.urihttp://hdl.handle.net/1828/9785
dc.language.isoenen_US
dc.publisherEcology and Evolutionen_US
dc.subjectBarkley Sounden_US
dc.subjectMARKen_US
dc.subjectMark-Release-Recaptureen_US
dc.subjectparasitesen_US
dc.subjectsnail ecologyen_US
dc.subjectWinBUGSen_US
dc.titleLocal site differences in survival and parasitism of periwinkles (Littorina sitkana Philippi, 1846)en_US
dc.typeArticleen_US

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