期刊
HARMFUL ALGAE
卷 118, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.hal.2022.102310
关键词
Harmful algal blooms; Salmon; Strait of georgia; Gills; Histology; Chaetoceros convolutus; Dictyocha spp
资金
- Pacific Salmon Commission, Department of Fisheries and Oceans Canada
- Ocean Networks Canada
A four year study in Cowichan Bay, Canada found potential linkages between phytoplankton composition and abundance and the feeding and histopathology of juvenile salmon. Dense blooms of certain species of algae led to reduced feeding in Chinook salmon, and damage to gills and pathological changes in livers.
Based on a four year study conducted in Cowichan Bay, Canada, potential linkages between composition and abundance of phytoplankton and the feeding and histopathology of juvenile salmon were noted. During two dense blooms (Skeletonema spp. and Pseudo-nitzschia spp.), feeding of juvenile Chinook salmon decreased (n=202, empty stomachs > 50%). All collected salmon gills (n=5) were damaged following high levels of mechanically harmful Chaetoceros convolutus in the water column; all collected livers (n=5) showed signs of pathological changes during Octactis speculum bloom. These observations were consistent with effects previously reported from salmon farms, however this agreement must be treated with caution as it is based on a limited number of samples. We suggest that there is a need for comprehensive studies to evaluate the potential role of harmful algae as a stressor to wild fish in a coastal environment.
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