Ascaridoid Nematodes from the Stomach of Harp Seals, Phoca groenlandica , from Newfoundland and Labrador
Stomachs of 488 harp seals, Phoca groenlandica, collected off Newfoundland and Labrador during 1984–88, contained four species of ascaridoid nematodes. Seals had high prevalences and abundances of Contracaecum osculatum B and Phocascaris sp. but were rarely infected with Anisakis simplex B or Pseudo...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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1992
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Online Access: | http://dx.doi.org/10.1139/f92-106 http://www.nrcresearchpress.com/doi/pdf/10.1139/f92-106 |
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crcansciencepubl:10.1139/f92-106 2024-05-12T08:07:11+00:00 Ascaridoid Nematodes from the Stomach of Harp Seals, Phoca groenlandica , from Newfoundland and Labrador Brattey, John Ni, I-Hsun 1992 http://dx.doi.org/10.1139/f92-106 http://www.nrcresearchpress.com/doi/pdf/10.1139/f92-106 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 49, issue 5, page 956-966 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1992 crcansciencepubl https://doi.org/10.1139/f92-106 2024-04-18T06:54:48Z Stomachs of 488 harp seals, Phoca groenlandica, collected off Newfoundland and Labrador during 1984–88, contained four species of ascaridoid nematodes. Seals had high prevalences and abundances of Contracaecum osculatum B and Phocascaris sp. but were rarely infected with Anisakis simplex B or Pseudoterranova decipiens B (sealworm). Nematode abundance increased with age, and distribution of each species among seals was highly aggregated. Gastric lesions, often associated with clusters of nematodes, occurred in 13.8% of 405 seals. Female seals with large numbers of nematodes had a higher body condition index (sculp weight) than lightly infected females. Overall sex ratios of C. osculatum B and Phocascaris sp. were biased toward females, but sex ratios of adult nematodes among individual seals were heterogeneous. Most nematodes recovered were third- or fourth-stage larvae; adults of C. osculatum B and Phocascaris sp. were also common, but no mature females of A. simplex B or P. decipiens B were found. Harp seals are probably unimportant in the transmission of A. simplex but may be partly responsible for sealworm found in fish stocks off Newfoundland and Labrador. More information on other pinniped species is needed to assess more precisely the relative importance of harp seals in sealworm transmission. Article in Journal/Newspaper Newfoundland Phoca groenlandica Canadian Science Publishing Newfoundland Canadian Journal of Fisheries and Aquatic Sciences 49 5 956 966 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Brattey, John Ni, I-Hsun Ascaridoid Nematodes from the Stomach of Harp Seals, Phoca groenlandica , from Newfoundland and Labrador |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Stomachs of 488 harp seals, Phoca groenlandica, collected off Newfoundland and Labrador during 1984–88, contained four species of ascaridoid nematodes. Seals had high prevalences and abundances of Contracaecum osculatum B and Phocascaris sp. but were rarely infected with Anisakis simplex B or Pseudoterranova decipiens B (sealworm). Nematode abundance increased with age, and distribution of each species among seals was highly aggregated. Gastric lesions, often associated with clusters of nematodes, occurred in 13.8% of 405 seals. Female seals with large numbers of nematodes had a higher body condition index (sculp weight) than lightly infected females. Overall sex ratios of C. osculatum B and Phocascaris sp. were biased toward females, but sex ratios of adult nematodes among individual seals were heterogeneous. Most nematodes recovered were third- or fourth-stage larvae; adults of C. osculatum B and Phocascaris sp. were also common, but no mature females of A. simplex B or P. decipiens B were found. Harp seals are probably unimportant in the transmission of A. simplex but may be partly responsible for sealworm found in fish stocks off Newfoundland and Labrador. More information on other pinniped species is needed to assess more precisely the relative importance of harp seals in sealworm transmission. |
format |
Article in Journal/Newspaper |
author |
Brattey, John Ni, I-Hsun |
author_facet |
Brattey, John Ni, I-Hsun |
author_sort |
Brattey, John |
title |
Ascaridoid Nematodes from the Stomach of Harp Seals, Phoca groenlandica , from Newfoundland and Labrador |
title_short |
Ascaridoid Nematodes from the Stomach of Harp Seals, Phoca groenlandica , from Newfoundland and Labrador |
title_full |
Ascaridoid Nematodes from the Stomach of Harp Seals, Phoca groenlandica , from Newfoundland and Labrador |
title_fullStr |
Ascaridoid Nematodes from the Stomach of Harp Seals, Phoca groenlandica , from Newfoundland and Labrador |
title_full_unstemmed |
Ascaridoid Nematodes from the Stomach of Harp Seals, Phoca groenlandica , from Newfoundland and Labrador |
title_sort |
ascaridoid nematodes from the stomach of harp seals, phoca groenlandica , from newfoundland and labrador |
publisher |
Canadian Science Publishing |
publishDate |
1992 |
url |
http://dx.doi.org/10.1139/f92-106 http://www.nrcresearchpress.com/doi/pdf/10.1139/f92-106 |
geographic |
Newfoundland |
geographic_facet |
Newfoundland |
genre |
Newfoundland Phoca groenlandica |
genre_facet |
Newfoundland Phoca groenlandica |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 49, issue 5, page 956-966 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f92-106 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
49 |
container_issue |
5 |
container_start_page |
956 |
op_container_end_page |
966 |
_version_ |
1798849770113990656 |