Local site differences in survival and parasitism of periwinkles (Littorina sitkana Philippi, 1846)
| Autor: | Mónica Ayala-Díaz, Jean M. L. Richardson, Bradley R. Anholt |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Maximum likelihood Intertidal zone Parasitism snail ecology Snail parasites Littorina sitkana 010603 evolutionary biology 01 natural sciences Parasitic infection biology.animal Survivorship curve parasitic diseases 14. Life underwater Ecology Evolution Behavior and Systematics Nature and Landscape Conservation Original Research Mark‐Release‐Recapture MARK Ecology biology 010604 marine biology & hydrobiology Barkley Sound biology.organism_classification Uncorrelated WinBUGS |
| Zdroj: | Ecology and Evolution |
| ISSN: | 2045-7758 |
| Popis: | The 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. |
| Databáze: | OpenAIRE |
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