Population dynamics of the antarctic opisthobranch Philine gibba Strebel
Population structure and growth of Philine gibba Strebel have been examined using weight- and length-frequency analyses. The population consisted of five year classes but the 4th and 5th year classes were only separable immediately after spawning. Sexual maturity was reached after ≈ 3 yr, spawning o...
Published in: | Journal of Experimental Marine Biology and Ecology |
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1982
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Online Access: | http://nora.nerc.ac.uk/id/eprint/524471/ https://doi.org/10.1016/0022-0981(82)90156-3 |
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ftnerc:oai:nora.nerc.ac.uk:524471 2023-12-17T10:21:53+01:00 Population dynamics of the antarctic opisthobranch Philine gibba Strebel Seager, John R. 1982 http://nora.nerc.ac.uk/id/eprint/524471/ https://doi.org/10.1016/0022-0981(82)90156-3 unknown Elsevier Seager, John R. 1982 Population dynamics of the antarctic opisthobranch Philine gibba Strebel. Journal of Experimental Marine Biology and Ecology, 60 (2-3). 163-179. https://doi.org/10.1016/0022-0981(82)90156-3 <https://doi.org/10.1016/0022-0981(82)90156-3> Publication - Article PeerReviewed 1982 ftnerc https://doi.org/10.1016/0022-0981(82)90156-3 2023-11-17T00:03:30Z Population structure and growth of Philine gibba Strebel have been examined using weight- and length-frequency analyses. The population consisted of five year classes but the 4th and 5th year classes were only separable immediately after spawning. Sexual maturity was reached after ≈ 3 yr, spawning occurred at 3.75 yr and death, after a second spawning, at 4.75 yr. Somatic growth was discontinuous and reproduction caused a mean somatic weight loss of 30.2% (ash-free dry wt). Shell growth was interrupted briefly during reproduction and the growth rate increased during the first 18 months of life but decreased steadily thereafter. Mortality of juveniles was high and during the 2-yr study there was negligible recruitment to the mature population. High mortality of juveniles was attributed to intraspecific competition for food and size-specific predation. Article in Journal/Newspaper Antarc* Antarctic Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Gibba ENVELOPE(6.000,6.000,62.567,62.567) Journal of Experimental Marine Biology and Ecology 60 2-3 163 179 |
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Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
unknown |
description |
Population structure and growth of Philine gibba Strebel have been examined using weight- and length-frequency analyses. The population consisted of five year classes but the 4th and 5th year classes were only separable immediately after spawning. Sexual maturity was reached after ≈ 3 yr, spawning occurred at 3.75 yr and death, after a second spawning, at 4.75 yr. Somatic growth was discontinuous and reproduction caused a mean somatic weight loss of 30.2% (ash-free dry wt). Shell growth was interrupted briefly during reproduction and the growth rate increased during the first 18 months of life but decreased steadily thereafter. Mortality of juveniles was high and during the 2-yr study there was negligible recruitment to the mature population. High mortality of juveniles was attributed to intraspecific competition for food and size-specific predation. |
format |
Article in Journal/Newspaper |
author |
Seager, John R. |
spellingShingle |
Seager, John R. Population dynamics of the antarctic opisthobranch Philine gibba Strebel |
author_facet |
Seager, John R. |
author_sort |
Seager, John R. |
title |
Population dynamics of the antarctic opisthobranch Philine gibba Strebel |
title_short |
Population dynamics of the antarctic opisthobranch Philine gibba Strebel |
title_full |
Population dynamics of the antarctic opisthobranch Philine gibba Strebel |
title_fullStr |
Population dynamics of the antarctic opisthobranch Philine gibba Strebel |
title_full_unstemmed |
Population dynamics of the antarctic opisthobranch Philine gibba Strebel |
title_sort |
population dynamics of the antarctic opisthobranch philine gibba strebel |
publisher |
Elsevier |
publishDate |
1982 |
url |
http://nora.nerc.ac.uk/id/eprint/524471/ https://doi.org/10.1016/0022-0981(82)90156-3 |
long_lat |
ENVELOPE(6.000,6.000,62.567,62.567) |
geographic |
Antarctic The Antarctic Gibba |
geographic_facet |
Antarctic The Antarctic Gibba |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
Seager, John R. 1982 Population dynamics of the antarctic opisthobranch Philine gibba Strebel. Journal of Experimental Marine Biology and Ecology, 60 (2-3). 163-179. https://doi.org/10.1016/0022-0981(82)90156-3 <https://doi.org/10.1016/0022-0981(82)90156-3> |
op_doi |
https://doi.org/10.1016/0022-0981(82)90156-3 |
container_title |
Journal of Experimental Marine Biology and Ecology |
container_volume |
60 |
container_issue |
2-3 |
container_start_page |
163 |
op_container_end_page |
179 |
_version_ |
1785540160647069696 |