Age composition and feeding ecology of early juvenile Notothenia rossii (Pisces, Nototheniidae) at Potter Cove, South Shetland Islands, Antarctica
Abstract Age and diet of 140 brown phase early juvenile Notothenia rossii specimens caught at Potter Cove from December 2005–March 2006 were studied. Fish were immature, in the range 8.5–21 cm TL and of age groups 1–2 (otolith/scale readings). The diet (F% and coefficient Q methods) was mainly benth...
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Cambridge University Press (CUP)
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Online Access: | http://dx.doi.org/10.1017/s0954102008000953 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102008000953 |
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crcambridgeupr:10.1017/s0954102008000953 2024-09-15T17:44:23+00:00 Age composition and feeding ecology of early juvenile Notothenia rossii (Pisces, Nototheniidae) at Potter Cove, South Shetland Islands, Antarctica Barrera-Oro, Esteban R. Winter, Debora J. 2008 http://dx.doi.org/10.1017/s0954102008000953 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102008000953 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 20, issue 4, page 339-341 ISSN 0954-1020 1365-2079 journal-article 2008 crcambridgeupr https://doi.org/10.1017/s0954102008000953 2024-07-24T04:04:10Z Abstract Age and diet of 140 brown phase early juvenile Notothenia rossii specimens caught at Potter Cove from December 2005–March 2006 were studied. Fish were immature, in the range 8.5–21 cm TL and of age groups 1–2 (otolith/scale readings). The diet (F% and coefficient Q methods) was mainly benthic-demersal organisms with Gammaridean amphipods (primarily Gondogeneia antarctica ) as the most frequent (F% = 98) and main prey (Q% = 97). The occurrence of algae, gastropods and harpacticoid copepods was high, but these organisms were secondary or occasional food. The importance of other benthic (bivalves, polychaetes, isopods) and pelagic (ostracods, calanoids, hyperiid amphipods, krill) prey was very low. Preference of larger fish for larger prey was evident. Stomach fullness analysis showed high food availability during the sampling period. Young stages of N. rossii are demersal, preying mainly on gammarideans and other invertebrates of the benthic community associated with macroalgae beds. The almost complete lack of plankton components in the diet of early juvenile fish suggests they do not migrate vertically to feed. Article in Journal/Newspaper Antarc* Antarctic Science Antarctica Notothenia rossii South Shetland Islands Copepods Cambridge University Press Antarctic Science 20 4 339 341 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
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English |
description |
Abstract Age and diet of 140 brown phase early juvenile Notothenia rossii specimens caught at Potter Cove from December 2005–March 2006 were studied. Fish were immature, in the range 8.5–21 cm TL and of age groups 1–2 (otolith/scale readings). The diet (F% and coefficient Q methods) was mainly benthic-demersal organisms with Gammaridean amphipods (primarily Gondogeneia antarctica ) as the most frequent (F% = 98) and main prey (Q% = 97). The occurrence of algae, gastropods and harpacticoid copepods was high, but these organisms were secondary or occasional food. The importance of other benthic (bivalves, polychaetes, isopods) and pelagic (ostracods, calanoids, hyperiid amphipods, krill) prey was very low. Preference of larger fish for larger prey was evident. Stomach fullness analysis showed high food availability during the sampling period. Young stages of N. rossii are demersal, preying mainly on gammarideans and other invertebrates of the benthic community associated with macroalgae beds. The almost complete lack of plankton components in the diet of early juvenile fish suggests they do not migrate vertically to feed. |
format |
Article in Journal/Newspaper |
author |
Barrera-Oro, Esteban R. Winter, Debora J. |
spellingShingle |
Barrera-Oro, Esteban R. Winter, Debora J. Age composition and feeding ecology of early juvenile Notothenia rossii (Pisces, Nototheniidae) at Potter Cove, South Shetland Islands, Antarctica |
author_facet |
Barrera-Oro, Esteban R. Winter, Debora J. |
author_sort |
Barrera-Oro, Esteban R. |
title |
Age composition and feeding ecology of early juvenile Notothenia rossii (Pisces, Nototheniidae) at Potter Cove, South Shetland Islands, Antarctica |
title_short |
Age composition and feeding ecology of early juvenile Notothenia rossii (Pisces, Nototheniidae) at Potter Cove, South Shetland Islands, Antarctica |
title_full |
Age composition and feeding ecology of early juvenile Notothenia rossii (Pisces, Nototheniidae) at Potter Cove, South Shetland Islands, Antarctica |
title_fullStr |
Age composition and feeding ecology of early juvenile Notothenia rossii (Pisces, Nototheniidae) at Potter Cove, South Shetland Islands, Antarctica |
title_full_unstemmed |
Age composition and feeding ecology of early juvenile Notothenia rossii (Pisces, Nototheniidae) at Potter Cove, South Shetland Islands, Antarctica |
title_sort |
age composition and feeding ecology of early juvenile notothenia rossii (pisces, nototheniidae) at potter cove, south shetland islands, antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
2008 |
url |
http://dx.doi.org/10.1017/s0954102008000953 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102008000953 |
genre |
Antarc* Antarctic Science Antarctica Notothenia rossii South Shetland Islands Copepods |
genre_facet |
Antarc* Antarctic Science Antarctica Notothenia rossii South Shetland Islands Copepods |
op_source |
Antarctic Science volume 20, issue 4, page 339-341 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102008000953 |
container_title |
Antarctic Science |
container_volume |
20 |
container_issue |
4 |
container_start_page |
339 |
op_container_end_page |
341 |
_version_ |
1810491911138443264 |