The Northwest Atlantic deep-sea red crab (Chaceon quinquedens) population before and after the onset of harvesting
The population structure of deep-sea red crab (Chaceon quinquedens) in a nearly unexploited state is compared with its condition three decades later after more than a decade of sustained harvesting. Our study is based on a camera and net trawl survey conducted in 1974, which we repeated between 2003...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.532.2740 2023-05-15T17:45:41+02:00 The Northwest Atlantic deep-sea red crab (Chaceon quinquedens) population before and after the onset of harvesting Richard A. Wahle Charlene E. Bergeron Antonie S. Chute Larry D. Jacobson Yong Chen The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.532.2740 http://icesjms.oxfordjournals.org/content/65/6/862.full.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.532.2740 http://icesjms.oxfordjournals.org/content/65/6/862.full.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://icesjms.oxfordjournals.org/content/65/6/862.full.pdf Chaceon quinquedens geryonid harvesting impacts virgin population text ftciteseerx 2016-01-08T10:39:52Z The population structure of deep-sea red crab (Chaceon quinquedens) in a nearly unexploited state is compared with its condition three decades later after more than a decade of sustained harvesting. Our study is based on a camera and net trawl survey conducted in 1974, which we repeated between 2003 and 2005 on the southern New England shelf break. Although the overall biomass of red crabs was estimated to be higher than in 1974, the abundance of large males, which are targeted by the fishery, was considerably lower. In particular, the biomass of large males (114 mm carapace width), considered in 1974 to be marketable, declined by 42%. Declines were most evident at depths and regions most accessible to the fishing fleet based in southern New England. With the change in fishery selectivity towards smaller male crabs, the abundance of currently harvestable crabs is about equal to 1974 levels. No declines were observed in the biomass of female and smaller male crabs not targeted by the fishery. Indeed, the abundance of juveniles appears considerably higher than in 1974. Perhaps, adverse effects on reproduction attributable to a reduction in the numbers of large males may be a consequence of fishing, but fishery impacts and productivity are difficult to assess because key biological information is lacking. Text Northwest Atlantic Unknown |
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ftciteseerx |
language |
English |
topic |
Chaceon quinquedens geryonid harvesting impacts virgin population |
spellingShingle |
Chaceon quinquedens geryonid harvesting impacts virgin population Richard A. Wahle Charlene E. Bergeron Antonie S. Chute Larry D. Jacobson Yong Chen The Northwest Atlantic deep-sea red crab (Chaceon quinquedens) population before and after the onset of harvesting |
topic_facet |
Chaceon quinquedens geryonid harvesting impacts virgin population |
description |
The population structure of deep-sea red crab (Chaceon quinquedens) in a nearly unexploited state is compared with its condition three decades later after more than a decade of sustained harvesting. Our study is based on a camera and net trawl survey conducted in 1974, which we repeated between 2003 and 2005 on the southern New England shelf break. Although the overall biomass of red crabs was estimated to be higher than in 1974, the abundance of large males, which are targeted by the fishery, was considerably lower. In particular, the biomass of large males (114 mm carapace width), considered in 1974 to be marketable, declined by 42%. Declines were most evident at depths and regions most accessible to the fishing fleet based in southern New England. With the change in fishery selectivity towards smaller male crabs, the abundance of currently harvestable crabs is about equal to 1974 levels. No declines were observed in the biomass of female and smaller male crabs not targeted by the fishery. Indeed, the abundance of juveniles appears considerably higher than in 1974. Perhaps, adverse effects on reproduction attributable to a reduction in the numbers of large males may be a consequence of fishing, but fishery impacts and productivity are difficult to assess because key biological information is lacking. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Richard A. Wahle Charlene E. Bergeron Antonie S. Chute Larry D. Jacobson Yong Chen |
author_facet |
Richard A. Wahle Charlene E. Bergeron Antonie S. Chute Larry D. Jacobson Yong Chen |
author_sort |
Richard A. Wahle |
title |
The Northwest Atlantic deep-sea red crab (Chaceon quinquedens) population before and after the onset of harvesting |
title_short |
The Northwest Atlantic deep-sea red crab (Chaceon quinquedens) population before and after the onset of harvesting |
title_full |
The Northwest Atlantic deep-sea red crab (Chaceon quinquedens) population before and after the onset of harvesting |
title_fullStr |
The Northwest Atlantic deep-sea red crab (Chaceon quinquedens) population before and after the onset of harvesting |
title_full_unstemmed |
The Northwest Atlantic deep-sea red crab (Chaceon quinquedens) population before and after the onset of harvesting |
title_sort |
northwest atlantic deep-sea red crab (chaceon quinquedens) population before and after the onset of harvesting |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.532.2740 http://icesjms.oxfordjournals.org/content/65/6/862.full.pdf |
genre |
Northwest Atlantic |
genre_facet |
Northwest Atlantic |
op_source |
http://icesjms.oxfordjournals.org/content/65/6/862.full.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.532.2740 http://icesjms.oxfordjournals.org/content/65/6/862.full.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766148875116085248 |