Stomach contents of immature lobsters ( Homarus americanus ) from Placentia Bay, Newfoundland
Stomachs of immature lobsters (Homarus americanus) from Placentia Bay, Newfoundland, were examined to determine natural diet. The most frequently occurring prey were sea urchins, mussels, rock crabs, polynoid and nereid polychaetes, and brittlestars. There was high incidence of lobster exuviae durin...
Published in: | Canadian Journal of Zoology |
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Language: | English |
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Canadian Science Publishing
1982
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crcansciencepubl:10.1139/z82-045 2023-12-17T10:44:33+01:00 Stomach contents of immature lobsters ( Homarus americanus ) from Placentia Bay, Newfoundland Carter, J. A. Steele, D. H. 1982 http://dx.doi.org/10.1139/z82-045 http://www.nrcresearchpress.com/doi/pdf/10.1139/z82-045 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 60, issue 3, page 337-347 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1982 crcansciencepubl https://doi.org/10.1139/z82-045 2023-11-19T13:38:42Z Stomachs of immature lobsters (Homarus americanus) from Placentia Bay, Newfoundland, were examined to determine natural diet. The most frequently occurring prey were sea urchins, mussels, rock crabs, polynoid and nereid polychaetes, and brittlestars. There was high incidence of lobster exuviae during the moulting period in late summer. Rock crabs, brittlestars, and mussels were dominant (in terms of relative volumes of hard parts in each stomach) more often than other food items. Sea urchins, periwinkles, chitons, rock crabs, and polynoids were consumed more frequently in late summer compared with other seasons. Stomach contents constituted approximately 1% of the wet weight of individual lobsters. There were no significant seasonal differences in stomach fullness during the period June to November.The residencies of natural prey hard parts in immature lobster stomachs were estimated. Some items remained in stomachs for up to 180 days. Measures of stomach fullness of lobsters 3 days after ad libitum feeding on rock crabs, mussels, and sea urchins were similar. Linear selection indices indicated relatively high selection by immature lobsters for hard parts of rock crabs and mussels and positive selection for nereids, polynoids, and brittlestars. Immature lobsters showed negative selection for hard parts of sea urchins, starfish, and periwinkles. Article in Journal/Newspaper Newfoundland Canadian Science Publishing (via Crossref) Canadian Journal of Zoology 60 3 337 347 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Carter, J. A. Steele, D. H. Stomach contents of immature lobsters ( Homarus americanus ) from Placentia Bay, Newfoundland |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
Stomachs of immature lobsters (Homarus americanus) from Placentia Bay, Newfoundland, were examined to determine natural diet. The most frequently occurring prey were sea urchins, mussels, rock crabs, polynoid and nereid polychaetes, and brittlestars. There was high incidence of lobster exuviae during the moulting period in late summer. Rock crabs, brittlestars, and mussels were dominant (in terms of relative volumes of hard parts in each stomach) more often than other food items. Sea urchins, periwinkles, chitons, rock crabs, and polynoids were consumed more frequently in late summer compared with other seasons. Stomach contents constituted approximately 1% of the wet weight of individual lobsters. There were no significant seasonal differences in stomach fullness during the period June to November.The residencies of natural prey hard parts in immature lobster stomachs were estimated. Some items remained in stomachs for up to 180 days. Measures of stomach fullness of lobsters 3 days after ad libitum feeding on rock crabs, mussels, and sea urchins were similar. Linear selection indices indicated relatively high selection by immature lobsters for hard parts of rock crabs and mussels and positive selection for nereids, polynoids, and brittlestars. Immature lobsters showed negative selection for hard parts of sea urchins, starfish, and periwinkles. |
format |
Article in Journal/Newspaper |
author |
Carter, J. A. Steele, D. H. |
author_facet |
Carter, J. A. Steele, D. H. |
author_sort |
Carter, J. A. |
title |
Stomach contents of immature lobsters ( Homarus americanus ) from Placentia Bay, Newfoundland |
title_short |
Stomach contents of immature lobsters ( Homarus americanus ) from Placentia Bay, Newfoundland |
title_full |
Stomach contents of immature lobsters ( Homarus americanus ) from Placentia Bay, Newfoundland |
title_fullStr |
Stomach contents of immature lobsters ( Homarus americanus ) from Placentia Bay, Newfoundland |
title_full_unstemmed |
Stomach contents of immature lobsters ( Homarus americanus ) from Placentia Bay, Newfoundland |
title_sort |
stomach contents of immature lobsters ( homarus americanus ) from placentia bay, newfoundland |
publisher |
Canadian Science Publishing |
publishDate |
1982 |
url |
http://dx.doi.org/10.1139/z82-045 http://www.nrcresearchpress.com/doi/pdf/10.1139/z82-045 |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Canadian Journal of Zoology volume 60, issue 3, page 337-347 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z82-045 |
container_title |
Canadian Journal of Zoology |
container_volume |
60 |
container_issue |
3 |
container_start_page |
337 |
op_container_end_page |
347 |
_version_ |
1785562780254863360 |