文章基本信息

标题：Identification of infectious agents in early marine Chinook and Coho salmon associated with cohort survival
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作者：Arthur L. Bass ; Andrew W. Bateman ; Brendan M. Connors 等
期刊名称：FACETS
印刷版ISSN：2371-1671
电子版ISSN：2371-1671
出版年度：2022
卷号：7
页码：742-773
DOI：10.1139/facets-2021-0102
语种：English
出版社：Canadian Science Publishing
摘要：Recent decades have seen an increased appreciation for the role infectious diseases can play in mass mortality events across a diversity of marine taxa. At the same time many Pacific salmon populations have declined in abundance as a result of reduced marine survival. However, few studies have explicitly considered the potential role pathogens could play in these declines. Using a multi-year dataset spanning 59 pathogen taxa in Chinook and Coho salmon sampled along the British Columbia coast, we carried out an exploratory analysis to quantify evidence for associations between pathogen prevalence and cohort survival and between pathogen load and body condition. While a variety of pathogens had moderate to strong negative correlations with body condition or survival for one host species in one season, we found that Tenacibaculum maritimum and Piscine orthoreovirus had consistently negative associations with body condition in both host species and seasons and were negatively associated with survival for Chinook salmon collected in the fall and winter. Our analyses, which offer the most comprehensive examination of associations between pathogen prevalence and Pacific salmon survival to date, suggest that pathogens in Pacific salmon warrant further attention, especially those whose distribution and abundance may be influenced by anthropogenic stressors.