Slow recovery of previously depleted demersal fish at the South Shetland Islands, 1983-2010
Following seals and baleen whales prior to the 1970s, demersal fish stocks were depleted off the South Shetland Islands by intensive industrial fishing during the late 1970s to early 1980s. Little has been reported since about how these stocks have fared, after international agreement closed this fi...
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ftconicet:oai:ri.conicet.gov.ar:11336/196999 2023-10-09T21:50:10+02:00 Slow recovery of previously depleted demersal fish at the South Shetland Islands, 1983-2010 Marschoff, Enrique Ricardo Barrera Oro, Esteban Alescio, Nadia Soledad Ainley, David G. application/pdf http://hdl.handle.net/11336/196999 eng eng Elsevier Science info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0165783612000975 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.fishres.2012.02.017 http://hdl.handle.net/11336/196999 Marschoff, Enrique Ricardo; Barrera Oro, Esteban; Alescio, Nadia Soledad; Ainley, David G.; Slow recovery of previously depleted demersal fish at the South Shetland Islands, 1983-2010; Elsevier Science; Fisheries Research; 125-126; 8-2012; 206-213 0165-7836 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ DEPENSATION FISH STOCK RECOVERY FISHERY DEPLETION NOTOTHENIIDAE SOUTH SHETLAND ISLANDS https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1016/j.fishres.2012.02.017 2023-09-24T19:15:10Z Following seals and baleen whales prior to the 1970s, demersal fish stocks were depleted off the South Shetland Islands by intensive industrial fishing during the late 1970s to early 1980s. Little has been reported since about how these stocks have fared, after international agreement closed this fishery in 1990. We report changes in size and abundance of the commercially exploited Notothenia rossii and Gobionotothen gibberifrons relative to the ecologically similar but unexploited Notothenia coriiceps at Potter Cove, South Shetland Islands, over a 28-yr period, 1983?2010. N. rossii abundance declined from 1983 to 1991, and an increase in mean size during 1983?1984 is consistent with weak cohorts during preceding years. Modal age changed from 2?3 to 6?7 yr. Length data of G. gibberifrons, available from 1986, exhibited a similar pattern, showing a decrease until 1991?1992. After a period of relative stability (1992?1994), a sharp increase in length and a continued decline in relative abundance indicated low recruitment. The length?frequency distribution of unexploited N. coriiceps throughout the whole period showed no change in modal size or mean length of the fish. We relate these patterns to the fishery and suggest that a further two decades will lapse before these stocks recover. Using the South Shetland fisheries as an example, current management rules for Southern Ocean fisheries, deemed to be precautionary and disallowing depletion beyond which a stock can recover in 2?3 decades, may be unrealistic in an ocean profoundly altered by numerous stock depletions and rapid climate change. Fil: Marschoff, Enrique Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina Fil: Barrera Oro, Esteban. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de ... Article in Journal/Newspaper baleen whales Dirección Nacional del Antártico Instituto Antártico Argentino Notothenia rossii South Shetland Islands Southern Ocean CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Southern Ocean South Shetland Islands Potter Cove Argentino Argentina Ricardo ENVELOPE(-63.033,-63.033,-64.867,-64.867) Fisheries Research 125-126 206 213 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
DEPENSATION FISH STOCK RECOVERY FISHERY DEPLETION NOTOTHENIIDAE SOUTH SHETLAND ISLANDS https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
DEPENSATION FISH STOCK RECOVERY FISHERY DEPLETION NOTOTHENIIDAE SOUTH SHETLAND ISLANDS https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Marschoff, Enrique Ricardo Barrera Oro, Esteban Alescio, Nadia Soledad Ainley, David G. Slow recovery of previously depleted demersal fish at the South Shetland Islands, 1983-2010 |
topic_facet |
DEPENSATION FISH STOCK RECOVERY FISHERY DEPLETION NOTOTHENIIDAE SOUTH SHETLAND ISLANDS https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
Following seals and baleen whales prior to the 1970s, demersal fish stocks were depleted off the South Shetland Islands by intensive industrial fishing during the late 1970s to early 1980s. Little has been reported since about how these stocks have fared, after international agreement closed this fishery in 1990. We report changes in size and abundance of the commercially exploited Notothenia rossii and Gobionotothen gibberifrons relative to the ecologically similar but unexploited Notothenia coriiceps at Potter Cove, South Shetland Islands, over a 28-yr period, 1983?2010. N. rossii abundance declined from 1983 to 1991, and an increase in mean size during 1983?1984 is consistent with weak cohorts during preceding years. Modal age changed from 2?3 to 6?7 yr. Length data of G. gibberifrons, available from 1986, exhibited a similar pattern, showing a decrease until 1991?1992. After a period of relative stability (1992?1994), a sharp increase in length and a continued decline in relative abundance indicated low recruitment. The length?frequency distribution of unexploited N. coriiceps throughout the whole period showed no change in modal size or mean length of the fish. We relate these patterns to the fishery and suggest that a further two decades will lapse before these stocks recover. Using the South Shetland fisheries as an example, current management rules for Southern Ocean fisheries, deemed to be precautionary and disallowing depletion beyond which a stock can recover in 2?3 decades, may be unrealistic in an ocean profoundly altered by numerous stock depletions and rapid climate change. Fil: Marschoff, Enrique Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina Fil: Barrera Oro, Esteban. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de ... |
format |
Article in Journal/Newspaper |
author |
Marschoff, Enrique Ricardo Barrera Oro, Esteban Alescio, Nadia Soledad Ainley, David G. |
author_facet |
Marschoff, Enrique Ricardo Barrera Oro, Esteban Alescio, Nadia Soledad Ainley, David G. |
author_sort |
Marschoff, Enrique Ricardo |
title |
Slow recovery of previously depleted demersal fish at the South Shetland Islands, 1983-2010 |
title_short |
Slow recovery of previously depleted demersal fish at the South Shetland Islands, 1983-2010 |
title_full |
Slow recovery of previously depleted demersal fish at the South Shetland Islands, 1983-2010 |
title_fullStr |
Slow recovery of previously depleted demersal fish at the South Shetland Islands, 1983-2010 |
title_full_unstemmed |
Slow recovery of previously depleted demersal fish at the South Shetland Islands, 1983-2010 |
title_sort |
slow recovery of previously depleted demersal fish at the south shetland islands, 1983-2010 |
publisher |
Elsevier Science |
url |
http://hdl.handle.net/11336/196999 |
long_lat |
ENVELOPE(-63.033,-63.033,-64.867,-64.867) |
geographic |
Southern Ocean South Shetland Islands Potter Cove Argentino Argentina Ricardo |
geographic_facet |
Southern Ocean South Shetland Islands Potter Cove Argentino Argentina Ricardo |
genre |
baleen whales Dirección Nacional del Antártico Instituto Antártico Argentino Notothenia rossii South Shetland Islands Southern Ocean |
genre_facet |
baleen whales Dirección Nacional del Antártico Instituto Antártico Argentino Notothenia rossii South Shetland Islands Southern Ocean |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0165783612000975 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.fishres.2012.02.017 http://hdl.handle.net/11336/196999 Marschoff, Enrique Ricardo; Barrera Oro, Esteban; Alescio, Nadia Soledad; Ainley, David G.; Slow recovery of previously depleted demersal fish at the South Shetland Islands, 1983-2010; Elsevier Science; Fisheries Research; 125-126; 8-2012; 206-213 0165-7836 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1016/j.fishres.2012.02.017 |
container_title |
Fisheries Research |
container_volume |
125-126 |
container_start_page |
206 |
op_container_end_page |
213 |
_version_ |
1779313230404911104 |