ArticleParasitology research2014
Anisakids (Nematoda: Anisakidae) from stomachs of northern fur seals (Callorhinus ursinus) on St. Paul Island, Alaska: parasitological and pathological analysis.
Article in Parasitology research, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed, 10 citations in OpenAlex.
- Anisakid biodiversity in two young harbour seals (Phoca vitulina L.) from coastal South-West Norway.Parasitology research · 2025Article
- Gastric lesions associated with the infection of Anisakidae nematodes in a dwarf sperm whaleInternational journal for parasitology. Parasites and wildlife · 2025Article
- Review of metazoan parasites of the northern fur seal (Callorhinus ursinus) and the analysis of the gastrointestinal helminth community of the population on St. Paul Island, Alaska.Parasitology research · 2021Article
- Genera and Species of the Anisakidae Family and Their Geographical Distribution.Animals : an open access journal from MDPI · 2020Review
- Metazoan parasites of California sea lions (International journal for parasitology. Parasites and wildlife · 2018Article
- Digeneans of northern fur seals Callorhinus ursinus (Pinnipedia: Otariidae) from five subpopulations on St. Paul Island, Alaska.Parasitology research · 2018Article
- The cestode community in northern fur seals (Callorhinus ursinus) on St. Paul Island, Alaska.International journal for parasitology. Parasites and wildlife · 2015Article
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Authors and funding
3 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Anisakid nematodes parasitize the alimentary tracts of aquatic vertebrates, including northern fur seals (Callorhinus ursinus) (NFS). The main purpose of this study was to estimate the prevalence, intensity, and species composition of anisakids in NFSs on St. Paul Island, Alaska, and to analyze changes in NFS infection with these nematodes during the last decades. The study was carried out on St. Paul Island, Alaska, in July-August 2011-2013. Stomachs of 443 humanely harvested NFS males were collected from five separate haul-out areas. A total of 4,460 anisakid specimens were collected and identified by morphological criteria. Gross and histological examinations of stomachs were also performed. The overall prevalence of NFS infection was 91.2%; overall mean intensity 10.9, and overall median intensity 6. Five species, Anisakis simplex s. l., Contracaecum osculatum s. l., Pseudoterranova decipiens s. l., P. azarazi and Phocascaris cystophorae, were found. The prevalence of Anisakis was 46.5%, its intensity 7.5. The prevalence and intensity of Contracaecum, Pseudoterranova, and Phocascaris were 33.6% and 3.5, 81.9% and 6.5, and 5.2% and 1.7, respectively. Significant differences in the prevalence of NFS infection were observed between separate haul-outs. Comparison of the present data with the results of studies performed in the North Pacific in the 1960s, showed a significant decrease in the intensity of NFS infection with anisakids during the last decades. The prevalence of mucosal lesions in NFS stomachs caused by anisakids also decreased from 92 to 20.9%. Possible reasons for the changes in NFS infection with anisakids are discussed.
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