Catchability of Pelagic Trawls for Sampling Deep-Living Nekton in the Mid-North Atlantic
Material collected in summer 2004 from the Mid-Atlantic Ridge between Iceland and the Azores with three pelagic trawls was used to estimate relative catchabilities of common fish, cephalopod, decapod, and jellyfish species. Catchability is defined as the ratio of numbers caught between two trawls, s...
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ftnsoutheastern:oai:nsuworks.nova.edu:occ_facarticles-1520 2023-05-15T16:50:54+02:00 Catchability of Pelagic Trawls for Sampling Deep-Living Nekton in the Mid-North Atlantic Heino, M. Porteiro, F. M. Sutton, Tracey Falkenhaug, Tone Godo, O. R. Piatkowski, Uwe 2011-01-01T08:00:00Z https://nsuworks.nova.edu/occ_facarticles/512 unknown NSUWorks https://nsuworks.nova.edu/occ_facarticles/512 Marine & Environmental Sciences Faculty Articles Catchability Gear comparison Mid-Atlantic Ridge Nekton Pelagic ecosystems Sampling Marine Biology Oceanography and Atmospheric Sciences and Meteorology article 2011 ftnsoutheastern 2022-04-10T21:29:44Z Material collected in summer 2004 from the Mid-Atlantic Ridge between Iceland and the Azores with three pelagic trawls was used to estimate relative catchabilities of common fish, cephalopod, decapod, and jellyfish species. Catchability is defined as the ratio of numbers caught between two trawls, standardized for towed distance. Taxon-specific catchability coefficients were estimated for two large pelagic trawls with graded meshes, using a smaller pelagic trawl with a uniform mesh size as the reference trawl. Two of the trawls were equipped with multiple opening–closing codends that allowed sampling of different depth layers. Generalized linear and mixed models suggest that most of the taxa have catchabilities much lower than expected from the area of opening alone, indicating that only a few species are herded by the large mesh at the mouth of larger trawls. Catchability coefficients across taxa show a very large spread, indicating that the sampled volume for the larger trawls with graded meshes was highly taxon-specific. Part of this variability can be explained by body size and taxonomic group, the latter probably reflecting differences in body form and behaviour. The catchability estimates presented here form the basis for combining data for quantitative analyses of community structure. Article in Journal/Newspaper Iceland North Atlantic Nova Southeastern University: NSU Works Mid-Atlantic Ridge |
institution |
Open Polar |
collection |
Nova Southeastern University: NSU Works |
op_collection_id |
ftnsoutheastern |
language |
unknown |
topic |
Catchability Gear comparison Mid-Atlantic Ridge Nekton Pelagic ecosystems Sampling Marine Biology Oceanography and Atmospheric Sciences and Meteorology |
spellingShingle |
Catchability Gear comparison Mid-Atlantic Ridge Nekton Pelagic ecosystems Sampling Marine Biology Oceanography and Atmospheric Sciences and Meteorology Heino, M. Porteiro, F. M. Sutton, Tracey Falkenhaug, Tone Godo, O. R. Piatkowski, Uwe Catchability of Pelagic Trawls for Sampling Deep-Living Nekton in the Mid-North Atlantic |
topic_facet |
Catchability Gear comparison Mid-Atlantic Ridge Nekton Pelagic ecosystems Sampling Marine Biology Oceanography and Atmospheric Sciences and Meteorology |
description |
Material collected in summer 2004 from the Mid-Atlantic Ridge between Iceland and the Azores with three pelagic trawls was used to estimate relative catchabilities of common fish, cephalopod, decapod, and jellyfish species. Catchability is defined as the ratio of numbers caught between two trawls, standardized for towed distance. Taxon-specific catchability coefficients were estimated for two large pelagic trawls with graded meshes, using a smaller pelagic trawl with a uniform mesh size as the reference trawl. Two of the trawls were equipped with multiple opening–closing codends that allowed sampling of different depth layers. Generalized linear and mixed models suggest that most of the taxa have catchabilities much lower than expected from the area of opening alone, indicating that only a few species are herded by the large mesh at the mouth of larger trawls. Catchability coefficients across taxa show a very large spread, indicating that the sampled volume for the larger trawls with graded meshes was highly taxon-specific. Part of this variability can be explained by body size and taxonomic group, the latter probably reflecting differences in body form and behaviour. The catchability estimates presented here form the basis for combining data for quantitative analyses of community structure. |
format |
Article in Journal/Newspaper |
author |
Heino, M. Porteiro, F. M. Sutton, Tracey Falkenhaug, Tone Godo, O. R. Piatkowski, Uwe |
author_facet |
Heino, M. Porteiro, F. M. Sutton, Tracey Falkenhaug, Tone Godo, O. R. Piatkowski, Uwe |
author_sort |
Heino, M. |
title |
Catchability of Pelagic Trawls for Sampling Deep-Living Nekton in the Mid-North Atlantic |
title_short |
Catchability of Pelagic Trawls for Sampling Deep-Living Nekton in the Mid-North Atlantic |
title_full |
Catchability of Pelagic Trawls for Sampling Deep-Living Nekton in the Mid-North Atlantic |
title_fullStr |
Catchability of Pelagic Trawls for Sampling Deep-Living Nekton in the Mid-North Atlantic |
title_full_unstemmed |
Catchability of Pelagic Trawls for Sampling Deep-Living Nekton in the Mid-North Atlantic |
title_sort |
catchability of pelagic trawls for sampling deep-living nekton in the mid-north atlantic |
publisher |
NSUWorks |
publishDate |
2011 |
url |
https://nsuworks.nova.edu/occ_facarticles/512 |
geographic |
Mid-Atlantic Ridge |
geographic_facet |
Mid-Atlantic Ridge |
genre |
Iceland North Atlantic |
genre_facet |
Iceland North Atlantic |
op_source |
Marine & Environmental Sciences Faculty Articles |
op_relation |
https://nsuworks.nova.edu/occ_facarticles/512 |
_version_ |
1766041020677488640 |