Richard E. Grewelle, Colleen Young, Corinne Gibble, Katherine Greenwald, Laird Henkel, Giulio A. De Leo, Melissa Miller
{"title":"南部海獭致命棘头虫感染的长期变化和季节性溢出风险","authors":"Richard E. Grewelle, Colleen Young, Corinne Gibble, Katherine Greenwald, Laird Henkel, Giulio A. De Leo, Melissa Miller","doi":"10.1002/ecs2.70330","DOIUrl":null,"url":null,"abstract":"<p>Southern sea otters (<i>Enhydra lutris nereis</i>) face numerous risks to population recovery from infectious disease, shark attacks, and biotoxins. Recently, the most significant contributor to fatal infectious disease in sea otters has been acanthocephalan peritonitis (AP) caused by <i>Profilicollis altmani</i>. Despite the importance of AP-associated otter mortality, long-term and seasonal risks for spillover of this parasite from its avian definitive hosts (seabirds and shorebirds) and crustacean intermediate hosts, Pacific mole crabs (<i>Emerita analoga</i>), are poorly resolved. We analyzed a 30-year dataset of sea otter strandings (<i>n</i> = 4460 cases) within the extant southern sea otter range to assess the contributions of temporal, demographic, geographic, and environmental risk factors to the prevalence of AP in southern sea otters. We found the incidence of AP was driven by high prevalence in immature otters near or in Morro and Monterey Bays, primarily in the late spring. The seasonal fluctuations in AP prevalence aligned closely with the presence of Pacific mole crabs in the gastrointestinal tracts of stranded otters. For Monterey Bay otters, AP prevalence was also higher during El Niño years. Long-term trend analyses suggest that seasonal, demographic, and geographic patterns of AP prevalence in southern sea otters have shifted. Southern sea otter population recovery efforts can be informed by long-term monitoring that assesses the evolving risks of AP and other sources of mortality.</p>","PeriodicalId":48930,"journal":{"name":"Ecosphere","volume":"16 8","pages":""},"PeriodicalIF":2.9000,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://esajournals.onlinelibrary.wiley.com/doi/epdf/10.1002/ecs2.70330","citationCount":"0","resultStr":"{\"title\":\"Long-term change and seasonal spillover risks of fatal acanthocephalan infection in southern sea otters\",\"authors\":\"Richard E. Grewelle, Colleen Young, Corinne Gibble, Katherine Greenwald, Laird Henkel, Giulio A. De Leo, Melissa Miller\",\"doi\":\"10.1002/ecs2.70330\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Southern sea otters (<i>Enhydra lutris nereis</i>) face numerous risks to population recovery from infectious disease, shark attacks, and biotoxins. Recently, the most significant contributor to fatal infectious disease in sea otters has been acanthocephalan peritonitis (AP) caused by <i>Profilicollis altmani</i>. Despite the importance of AP-associated otter mortality, long-term and seasonal risks for spillover of this parasite from its avian definitive hosts (seabirds and shorebirds) and crustacean intermediate hosts, Pacific mole crabs (<i>Emerita analoga</i>), are poorly resolved. We analyzed a 30-year dataset of sea otter strandings (<i>n</i> = 4460 cases) within the extant southern sea otter range to assess the contributions of temporal, demographic, geographic, and environmental risk factors to the prevalence of AP in southern sea otters. We found the incidence of AP was driven by high prevalence in immature otters near or in Morro and Monterey Bays, primarily in the late spring. The seasonal fluctuations in AP prevalence aligned closely with the presence of Pacific mole crabs in the gastrointestinal tracts of stranded otters. For Monterey Bay otters, AP prevalence was also higher during El Niño years. Long-term trend analyses suggest that seasonal, demographic, and geographic patterns of AP prevalence in southern sea otters have shifted. Southern sea otter population recovery efforts can be informed by long-term monitoring that assesses the evolving risks of AP and other sources of mortality.</p>\",\"PeriodicalId\":48930,\"journal\":{\"name\":\"Ecosphere\",\"volume\":\"16 8\",\"pages\":\"\"},\"PeriodicalIF\":2.9000,\"publicationDate\":\"2025-08-26\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://esajournals.onlinelibrary.wiley.com/doi/epdf/10.1002/ecs2.70330\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Ecosphere\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://esajournals.onlinelibrary.wiley.com/doi/10.1002/ecs2.70330\",\"RegionNum\":3,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ECOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ecosphere","FirstCategoryId":"93","ListUrlMain":"https://esajournals.onlinelibrary.wiley.com/doi/10.1002/ecs2.70330","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ECOLOGY","Score":null,"Total":0}
Long-term change and seasonal spillover risks of fatal acanthocephalan infection in southern sea otters
Southern sea otters (Enhydra lutris nereis) face numerous risks to population recovery from infectious disease, shark attacks, and biotoxins. Recently, the most significant contributor to fatal infectious disease in sea otters has been acanthocephalan peritonitis (AP) caused by Profilicollis altmani. Despite the importance of AP-associated otter mortality, long-term and seasonal risks for spillover of this parasite from its avian definitive hosts (seabirds and shorebirds) and crustacean intermediate hosts, Pacific mole crabs (Emerita analoga), are poorly resolved. We analyzed a 30-year dataset of sea otter strandings (n = 4460 cases) within the extant southern sea otter range to assess the contributions of temporal, demographic, geographic, and environmental risk factors to the prevalence of AP in southern sea otters. We found the incidence of AP was driven by high prevalence in immature otters near or in Morro and Monterey Bays, primarily in the late spring. The seasonal fluctuations in AP prevalence aligned closely with the presence of Pacific mole crabs in the gastrointestinal tracts of stranded otters. For Monterey Bay otters, AP prevalence was also higher during El Niño years. Long-term trend analyses suggest that seasonal, demographic, and geographic patterns of AP prevalence in southern sea otters have shifted. Southern sea otter population recovery efforts can be informed by long-term monitoring that assesses the evolving risks of AP and other sources of mortality.
期刊介绍:
The scope of Ecosphere is as broad as the science of ecology itself. The journal welcomes submissions from all sub-disciplines of ecological science, as well as interdisciplinary studies relating to ecology. The journal''s goal is to provide a rapid-publication, online-only, open-access alternative to ESA''s other journals, while maintaining the rigorous standards of peer review for which ESA publications are renowned.