Behaviour of the Antarctic fish Ophthalmolycus amberensis (Zoarcidae) on gravel and muddy bottom
The Antarctic zoarcid Ophthalmolycus amberensis occurs in Admiralty Bay (King George Island, South Shetlands) at 140 to 200m depth, where the bottom can be irregular, covered with gravel, or homogeneous, muddy, with fine sediment. In tanks, fish behaviour and adaptations to these two types of substr...
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National Institute of Polar Research
2001
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ftdoajarticles:oai:doaj.org/article:d017a1c27f934203ad3a081131fcfc0a 2023-05-15T14:03:49+02:00 Behaviour of the Antarctic fish Ophthalmolycus amberensis (Zoarcidae) on gravel and muddy bottom Edith Fanta Flavia Sant'Anna Rios Ana Aparecida Meyer 2001-03-01T00:00:00Z https://doi.org/10.15094/00009150 https://doaj.org/article/d017a1c27f934203ad3a081131fcfc0a EN JA eng jpn National Institute of Polar Research http://doi.org/10.15094/00009150 https://doaj.org/toc/0085-7289 https://doaj.org/toc/2432-079X doi:10.15094/00009150 0085-7289 2432-079X https://doaj.org/article/d017a1c27f934203ad3a081131fcfc0a Antarctic Record, Vol 45, Iss 1, Pp 13-26 (2001) Geography (General) G1-922 article 2001 ftdoajarticles https://doi.org/10.15094/00009150 2022-12-31T12:30:01Z The Antarctic zoarcid Ophthalmolycus amberensis occurs in Admiralty Bay (King George Island, South Shetlands) at 140 to 200m depth, where the bottom can be irregular, covered with gravel, or homogeneous, muddy, with fine sediment. In tanks, fish behaviour and adaptations to these two types of substrate were observed. The fish were active for less than 2% of the time an average, but individual variability was high. A circadian rhythm of motility was observed. They swam with rowing movements of the pectoral fins when on gravel, and with sinusoidal body movement when on muddy substrate. This resulted in significantly higher swimming speeds in fish on a muddy bottom, mainly at night, although bouts of swimming were more frequent on gravel. Their activity at night was higher for both substrates. Varied alert postures and alert for longer periods of time were observed on gravel than on muddy bottom. Fish exposed to muddy bottom fed more frequently and took greater amounts of food than fish on gravel, but failure in capturing in conjunction with rejection was higher than successful feeding. The capacity to make behavioural adjustments to the structure of the bottom allows O. amberensis to exploit efficiently different habitats at the sea bottom. Article in Journal/Newspaper Antarc* Antarctic King George Island Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic King George Island Admiralty Bay |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English Japanese |
topic |
Geography (General) G1-922 |
spellingShingle |
Geography (General) G1-922 Edith Fanta Flavia Sant'Anna Rios Ana Aparecida Meyer Behaviour of the Antarctic fish Ophthalmolycus amberensis (Zoarcidae) on gravel and muddy bottom |
topic_facet |
Geography (General) G1-922 |
description |
The Antarctic zoarcid Ophthalmolycus amberensis occurs in Admiralty Bay (King George Island, South Shetlands) at 140 to 200m depth, where the bottom can be irregular, covered with gravel, or homogeneous, muddy, with fine sediment. In tanks, fish behaviour and adaptations to these two types of substrate were observed. The fish were active for less than 2% of the time an average, but individual variability was high. A circadian rhythm of motility was observed. They swam with rowing movements of the pectoral fins when on gravel, and with sinusoidal body movement when on muddy substrate. This resulted in significantly higher swimming speeds in fish on a muddy bottom, mainly at night, although bouts of swimming were more frequent on gravel. Their activity at night was higher for both substrates. Varied alert postures and alert for longer periods of time were observed on gravel than on muddy bottom. Fish exposed to muddy bottom fed more frequently and took greater amounts of food than fish on gravel, but failure in capturing in conjunction with rejection was higher than successful feeding. The capacity to make behavioural adjustments to the structure of the bottom allows O. amberensis to exploit efficiently different habitats at the sea bottom. |
format |
Article in Journal/Newspaper |
author |
Edith Fanta Flavia Sant'Anna Rios Ana Aparecida Meyer |
author_facet |
Edith Fanta Flavia Sant'Anna Rios Ana Aparecida Meyer |
author_sort |
Edith Fanta |
title |
Behaviour of the Antarctic fish Ophthalmolycus amberensis (Zoarcidae) on gravel and muddy bottom |
title_short |
Behaviour of the Antarctic fish Ophthalmolycus amberensis (Zoarcidae) on gravel and muddy bottom |
title_full |
Behaviour of the Antarctic fish Ophthalmolycus amberensis (Zoarcidae) on gravel and muddy bottom |
title_fullStr |
Behaviour of the Antarctic fish Ophthalmolycus amberensis (Zoarcidae) on gravel and muddy bottom |
title_full_unstemmed |
Behaviour of the Antarctic fish Ophthalmolycus amberensis (Zoarcidae) on gravel and muddy bottom |
title_sort |
behaviour of the antarctic fish ophthalmolycus amberensis (zoarcidae) on gravel and muddy bottom |
publisher |
National Institute of Polar Research |
publishDate |
2001 |
url |
https://doi.org/10.15094/00009150 https://doaj.org/article/d017a1c27f934203ad3a081131fcfc0a |
geographic |
Antarctic The Antarctic King George Island Admiralty Bay |
geographic_facet |
Antarctic The Antarctic King George Island Admiralty Bay |
genre |
Antarc* Antarctic King George Island |
genre_facet |
Antarc* Antarctic King George Island |
op_source |
Antarctic Record, Vol 45, Iss 1, Pp 13-26 (2001) |
op_relation |
http://doi.org/10.15094/00009150 https://doaj.org/toc/0085-7289 https://doaj.org/toc/2432-079X doi:10.15094/00009150 0085-7289 2432-079X https://doaj.org/article/d017a1c27f934203ad3a081131fcfc0a |
op_doi |
https://doi.org/10.15094/00009150 |
_version_ |
1766274674550898688 |