Abundance and diurnal vertical distribution of fish larvae in early spring and summer in a fjord at South Georgia
The diurnal vertical distribution and abundance of fish larvae was studied by net samples in the 265 m deep fjord of Cumberland East Bay, South Georgia. In early spring the six most abundant species of fish larvae in the upper 200 m of the water column were Champsocephalus gunnari, Lepidonotothen nu...
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Cambridge University Press (CUP)
1992
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Online Access: | http://dx.doi.org/10.1017/s0954102092000609 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102092000609 |
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crcambridgeupr:10.1017/s0954102092000609 2024-05-19T07:29:48+00:00 Abundance and diurnal vertical distribution of fish larvae in early spring and summer in a fjord at South Georgia North, A. W. Murray, A. W. A. 1992 http://dx.doi.org/10.1017/s0954102092000609 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102092000609 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 4, issue 4, page 405-412 ISSN 0954-1020 1365-2079 journal-article 1992 crcambridgeupr https://doi.org/10.1017/s0954102092000609 2024-04-25T06:51:45Z The diurnal vertical distribution and abundance of fish larvae was studied by net samples in the 265 m deep fjord of Cumberland East Bay, South Georgia. In early spring the six most abundant species of fish larvae in the upper 200 m of the water column were Champsocephalus gunnari, Lepidonotothen nudifrons, Pseudochaenichthys georgianus, Chaenocephalus aceratus, Parachaenichthys' georgianus and Electrona antarctica. In summer, the larvae of C. gunnari, Gobionotothen gibberifrons, Lepidonotothen larseni and Trematomus hansoni were most abundant, and the majority were found in the upper 140 m of the water column, with greatest densities in the top 2m. During both seasons most species showed some evidence of diurnal vertical migration. A distinct pattern was found for C. gunnari in summer; they were at 0–20 m during the day and 60–100 m at midnight. Net avoidance by the larvae of most species was greater before sunset in early spring, and during all periods of daylight in summer, than at other times of day. Article in Journal/Newspaper Antarc* Antarctic Science Antarctica Cambridge University Press Antarctic Science 4 4 405 412 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
The diurnal vertical distribution and abundance of fish larvae was studied by net samples in the 265 m deep fjord of Cumberland East Bay, South Georgia. In early spring the six most abundant species of fish larvae in the upper 200 m of the water column were Champsocephalus gunnari, Lepidonotothen nudifrons, Pseudochaenichthys georgianus, Chaenocephalus aceratus, Parachaenichthys' georgianus and Electrona antarctica. In summer, the larvae of C. gunnari, Gobionotothen gibberifrons, Lepidonotothen larseni and Trematomus hansoni were most abundant, and the majority were found in the upper 140 m of the water column, with greatest densities in the top 2m. During both seasons most species showed some evidence of diurnal vertical migration. A distinct pattern was found for C. gunnari in summer; they were at 0–20 m during the day and 60–100 m at midnight. Net avoidance by the larvae of most species was greater before sunset in early spring, and during all periods of daylight in summer, than at other times of day. |
format |
Article in Journal/Newspaper |
author |
North, A. W. Murray, A. W. A. |
spellingShingle |
North, A. W. Murray, A. W. A. Abundance and diurnal vertical distribution of fish larvae in early spring and summer in a fjord at South Georgia |
author_facet |
North, A. W. Murray, A. W. A. |
author_sort |
North, A. W. |
title |
Abundance and diurnal vertical distribution of fish larvae in early spring and summer in a fjord at South Georgia |
title_short |
Abundance and diurnal vertical distribution of fish larvae in early spring and summer in a fjord at South Georgia |
title_full |
Abundance and diurnal vertical distribution of fish larvae in early spring and summer in a fjord at South Georgia |
title_fullStr |
Abundance and diurnal vertical distribution of fish larvae in early spring and summer in a fjord at South Georgia |
title_full_unstemmed |
Abundance and diurnal vertical distribution of fish larvae in early spring and summer in a fjord at South Georgia |
title_sort |
abundance and diurnal vertical distribution of fish larvae in early spring and summer in a fjord at south georgia |
publisher |
Cambridge University Press (CUP) |
publishDate |
1992 |
url |
http://dx.doi.org/10.1017/s0954102092000609 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102092000609 |
genre |
Antarc* Antarctic Science Antarctica |
genre_facet |
Antarc* Antarctic Science Antarctica |
op_source |
Antarctic Science volume 4, issue 4, page 405-412 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102092000609 |
container_title |
Antarctic Science |
container_volume |
4 |
container_issue |
4 |
container_start_page |
405 |
op_container_end_page |
412 |
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1799481494798860288 |