Structure and distribution of the slope fish community in the vicinity of the sub-Antarctic Prince Edward Archipelago
Demersal fish community structure, distribution and trophic relationships on the slope (depth range 200–1500 m) of the sub-Antarctic Prince Edward Islands and surrounding sea rises were investigated during a pilot survey conducted in April 2001 onboard fishing vessel MV Iris. A total of 56 fish taxa...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.537.6561 2023-05-15T13:52:00+02:00 Structure and distribution of the slope fish community in the vicinity of the sub-Antarctic Prince Edward Archipelago E. A. Pakhomov T. Bushula S. Kaehler B. P. Watkins R. W. Leslie South Africa The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.537.6561 http://eprints.ru.ac.za/815/1/Structure-and-distribution.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.537.6561 http://eprints.ru.ac.za/815/1/Structure-and-distribution.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://eprints.ru.ac.za/815/1/Structure-and-distribution.pdf text ftciteseerx 2016-01-08T10:53:18Z Demersal fish community structure, distribution and trophic relationships on the slope (depth range 200–1500 m) of the sub-Antarctic Prince Edward Islands and surrounding sea rises were investigated during a pilot survey conducted in April 2001 onboard fishing vessel MV Iris. A total of 56 fish taxa were collected during the survey, of which 44 were identified to the species level, seven to the genus level and five to the family level. Among the identified taxa, 36 constituted new records for the area investigated. Total catch per unit effort (cpue) during the survey ranged from 1·1 to 241·2 individuals h 1. Both average fish diversity and total cpue positively correlated with trawling depth. Overall, mean sampling depth and near-bottom temperature explained 56 % of total fish cpue. Hierarchal cluster analysis identified three distinct fish assemblages with pronounced dominant species. Major shifts in fish community composition occurred at 500–600 m and 800–900 m depth strata and could probably be a result of physical and biological vertical zonation. Analysis of the diet of selected fish species showed that they were generalist feeders, consuming predominantly pelagic, including epipelagic, meso- and benthopelagic, prey. Diets of six species and nitrogen stable isotope signatures of 22 species revealed that with a few exceptions most fishes occupied the fourth trophic level and were tertiary consumers. Wide variability in carbon isotopic signatures is discussed with respect to alternative, e.g. possible importance of high Antarctic and chemoautotrophic v. Text Antarc* Antarctic Prince Edward Islands Unknown Antarctic |
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English |
description |
Demersal fish community structure, distribution and trophic relationships on the slope (depth range 200–1500 m) of the sub-Antarctic Prince Edward Islands and surrounding sea rises were investigated during a pilot survey conducted in April 2001 onboard fishing vessel MV Iris. A total of 56 fish taxa were collected during the survey, of which 44 were identified to the species level, seven to the genus level and five to the family level. Among the identified taxa, 36 constituted new records for the area investigated. Total catch per unit effort (cpue) during the survey ranged from 1·1 to 241·2 individuals h 1. Both average fish diversity and total cpue positively correlated with trawling depth. Overall, mean sampling depth and near-bottom temperature explained 56 % of total fish cpue. Hierarchal cluster analysis identified three distinct fish assemblages with pronounced dominant species. Major shifts in fish community composition occurred at 500–600 m and 800–900 m depth strata and could probably be a result of physical and biological vertical zonation. Analysis of the diet of selected fish species showed that they were generalist feeders, consuming predominantly pelagic, including epipelagic, meso- and benthopelagic, prey. Diets of six species and nitrogen stable isotope signatures of 22 species revealed that with a few exceptions most fishes occupied the fourth trophic level and were tertiary consumers. Wide variability in carbon isotopic signatures is discussed with respect to alternative, e.g. possible importance of high Antarctic and chemoautotrophic v. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
E. A. Pakhomov T. Bushula S. Kaehler B. P. Watkins R. W. Leslie South Africa |
spellingShingle |
E. A. Pakhomov T. Bushula S. Kaehler B. P. Watkins R. W. Leslie South Africa Structure and distribution of the slope fish community in the vicinity of the sub-Antarctic Prince Edward Archipelago |
author_facet |
E. A. Pakhomov T. Bushula S. Kaehler B. P. Watkins R. W. Leslie South Africa |
author_sort |
E. A. Pakhomov |
title |
Structure and distribution of the slope fish community in the vicinity of the sub-Antarctic Prince Edward Archipelago |
title_short |
Structure and distribution of the slope fish community in the vicinity of the sub-Antarctic Prince Edward Archipelago |
title_full |
Structure and distribution of the slope fish community in the vicinity of the sub-Antarctic Prince Edward Archipelago |
title_fullStr |
Structure and distribution of the slope fish community in the vicinity of the sub-Antarctic Prince Edward Archipelago |
title_full_unstemmed |
Structure and distribution of the slope fish community in the vicinity of the sub-Antarctic Prince Edward Archipelago |
title_sort |
structure and distribution of the slope fish community in the vicinity of the sub-antarctic prince edward archipelago |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.537.6561 http://eprints.ru.ac.za/815/1/Structure-and-distribution.pdf |
geographic |
Antarctic |
geographic_facet |
Antarctic |
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Antarc* Antarctic Prince Edward Islands |
genre_facet |
Antarc* Antarctic Prince Edward Islands |
op_source |
http://eprints.ru.ac.za/815/1/Structure-and-distribution.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.537.6561 http://eprints.ru.ac.za/815/1/Structure-and-distribution.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766256158294671360 |