The role of fish as predators of krill (Euphausia superba) and other pelagic resources in the Southern Ocean

Autores
Kock, K. H.; Barrera Oro, Esteban; Belchier, M.; Collins, M. A.; Duhamel, G.; Hanchet, S.; Pshenichnov, L.; Welsford, D.; Williams, R.
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Krill forms an important part of the diet of many Antarctic fish species. An understanding of the role of fish as krill predators in the Southern Ocean is critical to understanding how changes in fish abundance, such as through fishing or environmental change, are likely to impact on the food webs in the region. First attempts to estimate the krill and pelagic food consumption by Antarctic demersal fish in the low Antarctic were made in the late 1970s/ early 1980s. Those estimates were constrained by a paucity of biomass estimates and the mostly qualitative nature of food studies. Food consumption estimates were extended to the mesopelagic realm and the high-Antarctic Zone in the late 1980s and early 1990s when these areas were exploited commercially for Electrona carlsbergi. Currently, the best estimates of annual krill consumption by fish are 23 000 000–29 000 000 tonnes of krill and other pelagic prey taken annually by demersal fish in the 1980s in the whole Southern Ocean, and 5 000 000–32 000 000 tonnes taken by mesopelagic fish in the Atlantic sector of the Southern Ocean. It is clear from this review that fish are important predators of krill, in particular the larger myctophids and some channichthyids and nototheniids, and that the importance of krill in fish diets varies substantially both with time and location on various scales, as well as with the availability of alternate prey in the different regions in the Southern Ocean. Ecosystem models therefore need to account for their role. However, several key areas of uncertainty exist, which need to be considered in ecosystem and food-web models for the Southern Ocean. For instance, no robust estimates of food consumption by mesopelagic fish can be provided for the vast areas of the Indian and Pacific Ocean sectors, or for several of the most abundant myctophid species in the Atlantic sector, due to the paucity of relevant studies in these regions. Where biomass estimates do exist, such as in the Atlantic sector, there can be a lack of precision in trawl and hydroacoustic surveys. Studies that adequately capture the seasonal variation in consumption rates and changing importance of krill in the diet of fish are also rare. Furthermore, the effects of large changes in abundance and community structure of fishes brought about by industrial fishing need to be considered when evaluating patterns that have emerged in Southern Ocean ecosystems in the course of the 20th century. As a first step towards a modelling approach to include fish in krill-based food-web models, it is suggested to incorporate data on Champsocephalus gunnari from the western Atlantic sector and Dissostichus mawsoni from the Ross Sea into modelling approaches within the CCAMLR Ecosystem Monitoring Program. Both species are important predators of krill (C. gunnari) and fish (D. mawsoni) in turn form key prey for top predators in each region.
Fil: Kock, K. H.. Johann Heinrich von Thünen Institut; Alemania
Fil: Barrera Oro, Esteban. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Belchier, M.. British Antartic Survey; Reino Unido
Fil: Collins, M. A.. Government of South Georgia and South Sandwich Islands; Islas Georgias del Sur y Sandwich del Sur
Fil: Duhamel, G.. Museum National D’Histoire Naturelle; Francia
Fil: Hanchet, S.. National Institute of Water and Atmospheric Research; Nueva Zelanda
Fil: Pshenichnov, L.. YugNIRO; Ucrania
Fil: Welsford, D.. Australian Antarctic Division; Australia
Fil: Williams, R.. Australian Antarctic Division; Australia
Materia
Notothenioidei
Antarctic
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/197889

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network_name_str CONICET Digital (CONICET)
spelling The role of fish as predators of krill (Euphausia superba) and other pelagic resources in the Southern OceanKock, K. H.Barrera Oro, EstebanBelchier, M.Collins, M. A.Duhamel, G.Hanchet, S.Pshenichnov, L.Welsford, D.Williams, R.NotothenioideiAntarctichttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Krill forms an important part of the diet of many Antarctic fish species. An understanding of the role of fish as krill predators in the Southern Ocean is critical to understanding how changes in fish abundance, such as through fishing or environmental change, are likely to impact on the food webs in the region. First attempts to estimate the krill and pelagic food consumption by Antarctic demersal fish in the low Antarctic were made in the late 1970s/ early 1980s. Those estimates were constrained by a paucity of biomass estimates and the mostly qualitative nature of food studies. Food consumption estimates were extended to the mesopelagic realm and the high-Antarctic Zone in the late 1980s and early 1990s when these areas were exploited commercially for Electrona carlsbergi. Currently, the best estimates of annual krill consumption by fish are 23 000 000–29 000 000 tonnes of krill and other pelagic prey taken annually by demersal fish in the 1980s in the whole Southern Ocean, and 5 000 000–32 000 000 tonnes taken by mesopelagic fish in the Atlantic sector of the Southern Ocean. It is clear from this review that fish are important predators of krill, in particular the larger myctophids and some channichthyids and nototheniids, and that the importance of krill in fish diets varies substantially both with time and location on various scales, as well as with the availability of alternate prey in the different regions in the Southern Ocean. Ecosystem models therefore need to account for their role. However, several key areas of uncertainty exist, which need to be considered in ecosystem and food-web models for the Southern Ocean. For instance, no robust estimates of food consumption by mesopelagic fish can be provided for the vast areas of the Indian and Pacific Ocean sectors, or for several of the most abundant myctophid species in the Atlantic sector, due to the paucity of relevant studies in these regions. Where biomass estimates do exist, such as in the Atlantic sector, there can be a lack of precision in trawl and hydroacoustic surveys. Studies that adequately capture the seasonal variation in consumption rates and changing importance of krill in the diet of fish are also rare. Furthermore, the effects of large changes in abundance and community structure of fishes brought about by industrial fishing need to be considered when evaluating patterns that have emerged in Southern Ocean ecosystems in the course of the 20th century. As a first step towards a modelling approach to include fish in krill-based food-web models, it is suggested to incorporate data on Champsocephalus gunnari from the western Atlantic sector and Dissostichus mawsoni from the Ross Sea into modelling approaches within the CCAMLR Ecosystem Monitoring Program. Both species are important predators of krill (C. gunnari) and fish (D. mawsoni) in turn form key prey for top predators in each region.Fil: Kock, K. H.. Johann Heinrich von Thünen Institut; AlemaniaFil: Barrera Oro, Esteban. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Belchier, M.. British Antartic Survey; Reino UnidoFil: Collins, M. A.. Government of South Georgia and South Sandwich Islands; Islas Georgias del Sur y Sandwich del SurFil: Duhamel, G.. Museum National D’Histoire Naturelle; FranciaFil: Hanchet, S.. National Institute of Water and Atmospheric Research; Nueva ZelandaFil: Pshenichnov, L.. YugNIRO; UcraniaFil: Welsford, D.. Australian Antarctic Division; AustraliaFil: Williams, R.. Australian Antarctic Division; AustraliaC C A M L R Ti2012-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/197889Kock, K. H.; Barrera Oro, Esteban; Belchier, M.; Collins, M. A.; Duhamel, G.; et al.; The role of fish as predators of krill (Euphausia superba) and other pelagic resources in the Southern Ocean; C C A M L R Ti; Ccamlr Science; 19; 10-2012; 115-1691023-40631023-4063CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.ccamlr.org/es/node/77426info:eu-repo/semantics/altIdentifier/url/https://www.ccamlr.org/fr/system/files/science_journal_papers/Kock-et-al.pdfinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:01:00Zoai:ri.conicet.gov.ar:11336/197889instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:01:01.272CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The role of fish as predators of krill (Euphausia superba) and other pelagic resources in the Southern Ocean
title The role of fish as predators of krill (Euphausia superba) and other pelagic resources in the Southern Ocean
spellingShingle The role of fish as predators of krill (Euphausia superba) and other pelagic resources in the Southern Ocean
Kock, K. H.
Notothenioidei
Antarctic
title_short The role of fish as predators of krill (Euphausia superba) and other pelagic resources in the Southern Ocean
title_full The role of fish as predators of krill (Euphausia superba) and other pelagic resources in the Southern Ocean
title_fullStr The role of fish as predators of krill (Euphausia superba) and other pelagic resources in the Southern Ocean
title_full_unstemmed The role of fish as predators of krill (Euphausia superba) and other pelagic resources in the Southern Ocean
title_sort The role of fish as predators of krill (Euphausia superba) and other pelagic resources in the Southern Ocean
dc.creator.none.fl_str_mv Kock, K. H.
Barrera Oro, Esteban
Belchier, M.
Collins, M. A.
Duhamel, G.
Hanchet, S.
Pshenichnov, L.
Welsford, D.
Williams, R.
author Kock, K. H.
author_facet Kock, K. H.
Barrera Oro, Esteban
Belchier, M.
Collins, M. A.
Duhamel, G.
Hanchet, S.
Pshenichnov, L.
Welsford, D.
Williams, R.
author_role author
author2 Barrera Oro, Esteban
Belchier, M.
Collins, M. A.
Duhamel, G.
Hanchet, S.
Pshenichnov, L.
Welsford, D.
Williams, R.
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Notothenioidei
Antarctic
topic Notothenioidei
Antarctic
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Krill forms an important part of the diet of many Antarctic fish species. An understanding of the role of fish as krill predators in the Southern Ocean is critical to understanding how changes in fish abundance, such as through fishing or environmental change, are likely to impact on the food webs in the region. First attempts to estimate the krill and pelagic food consumption by Antarctic demersal fish in the low Antarctic were made in the late 1970s/ early 1980s. Those estimates were constrained by a paucity of biomass estimates and the mostly qualitative nature of food studies. Food consumption estimates were extended to the mesopelagic realm and the high-Antarctic Zone in the late 1980s and early 1990s when these areas were exploited commercially for Electrona carlsbergi. Currently, the best estimates of annual krill consumption by fish are 23 000 000–29 000 000 tonnes of krill and other pelagic prey taken annually by demersal fish in the 1980s in the whole Southern Ocean, and 5 000 000–32 000 000 tonnes taken by mesopelagic fish in the Atlantic sector of the Southern Ocean. It is clear from this review that fish are important predators of krill, in particular the larger myctophids and some channichthyids and nototheniids, and that the importance of krill in fish diets varies substantially both with time and location on various scales, as well as with the availability of alternate prey in the different regions in the Southern Ocean. Ecosystem models therefore need to account for their role. However, several key areas of uncertainty exist, which need to be considered in ecosystem and food-web models for the Southern Ocean. For instance, no robust estimates of food consumption by mesopelagic fish can be provided for the vast areas of the Indian and Pacific Ocean sectors, or for several of the most abundant myctophid species in the Atlantic sector, due to the paucity of relevant studies in these regions. Where biomass estimates do exist, such as in the Atlantic sector, there can be a lack of precision in trawl and hydroacoustic surveys. Studies that adequately capture the seasonal variation in consumption rates and changing importance of krill in the diet of fish are also rare. Furthermore, the effects of large changes in abundance and community structure of fishes brought about by industrial fishing need to be considered when evaluating patterns that have emerged in Southern Ocean ecosystems in the course of the 20th century. As a first step towards a modelling approach to include fish in krill-based food-web models, it is suggested to incorporate data on Champsocephalus gunnari from the western Atlantic sector and Dissostichus mawsoni from the Ross Sea into modelling approaches within the CCAMLR Ecosystem Monitoring Program. Both species are important predators of krill (C. gunnari) and fish (D. mawsoni) in turn form key prey for top predators in each region.
Fil: Kock, K. H.. Johann Heinrich von Thünen Institut; Alemania
Fil: Barrera Oro, Esteban. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Belchier, M.. British Antartic Survey; Reino Unido
Fil: Collins, M. A.. Government of South Georgia and South Sandwich Islands; Islas Georgias del Sur y Sandwich del Sur
Fil: Duhamel, G.. Museum National D’Histoire Naturelle; Francia
Fil: Hanchet, S.. National Institute of Water and Atmospheric Research; Nueva Zelanda
Fil: Pshenichnov, L.. YugNIRO; Ucrania
Fil: Welsford, D.. Australian Antarctic Division; Australia
Fil: Williams, R.. Australian Antarctic Division; Australia
description Krill forms an important part of the diet of many Antarctic fish species. An understanding of the role of fish as krill predators in the Southern Ocean is critical to understanding how changes in fish abundance, such as through fishing or environmental change, are likely to impact on the food webs in the region. First attempts to estimate the krill and pelagic food consumption by Antarctic demersal fish in the low Antarctic were made in the late 1970s/ early 1980s. Those estimates were constrained by a paucity of biomass estimates and the mostly qualitative nature of food studies. Food consumption estimates were extended to the mesopelagic realm and the high-Antarctic Zone in the late 1980s and early 1990s when these areas were exploited commercially for Electrona carlsbergi. Currently, the best estimates of annual krill consumption by fish are 23 000 000–29 000 000 tonnes of krill and other pelagic prey taken annually by demersal fish in the 1980s in the whole Southern Ocean, and 5 000 000–32 000 000 tonnes taken by mesopelagic fish in the Atlantic sector of the Southern Ocean. It is clear from this review that fish are important predators of krill, in particular the larger myctophids and some channichthyids and nototheniids, and that the importance of krill in fish diets varies substantially both with time and location on various scales, as well as with the availability of alternate prey in the different regions in the Southern Ocean. Ecosystem models therefore need to account for their role. However, several key areas of uncertainty exist, which need to be considered in ecosystem and food-web models for the Southern Ocean. For instance, no robust estimates of food consumption by mesopelagic fish can be provided for the vast areas of the Indian and Pacific Ocean sectors, or for several of the most abundant myctophid species in the Atlantic sector, due to the paucity of relevant studies in these regions. Where biomass estimates do exist, such as in the Atlantic sector, there can be a lack of precision in trawl and hydroacoustic surveys. Studies that adequately capture the seasonal variation in consumption rates and changing importance of krill in the diet of fish are also rare. Furthermore, the effects of large changes in abundance and community structure of fishes brought about by industrial fishing need to be considered when evaluating patterns that have emerged in Southern Ocean ecosystems in the course of the 20th century. As a first step towards a modelling approach to include fish in krill-based food-web models, it is suggested to incorporate data on Champsocephalus gunnari from the western Atlantic sector and Dissostichus mawsoni from the Ross Sea into modelling approaches within the CCAMLR Ecosystem Monitoring Program. Both species are important predators of krill (C. gunnari) and fish (D. mawsoni) in turn form key prey for top predators in each region.
publishDate 2012
dc.date.none.fl_str_mv 2012-10
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/197889
Kock, K. H.; Barrera Oro, Esteban; Belchier, M.; Collins, M. A.; Duhamel, G.; et al.; The role of fish as predators of krill (Euphausia superba) and other pelagic resources in the Southern Ocean; C C A M L R Ti; Ccamlr Science; 19; 10-2012; 115-169
1023-4063
1023-4063
CONICET Digital
CONICET
url http://hdl.handle.net/11336/197889
identifier_str_mv Kock, K. H.; Barrera Oro, Esteban; Belchier, M.; Collins, M. A.; Duhamel, G.; et al.; The role of fish as predators of krill (Euphausia superba) and other pelagic resources in the Southern Ocean; C C A M L R Ti; Ccamlr Science; 19; 10-2012; 115-169
1023-4063
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.ccamlr.org/es/node/77426
info:eu-repo/semantics/altIdentifier/url/https://www.ccamlr.org/fr/system/files/science_journal_papers/Kock-et-al.pdf
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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dc.format.none.fl_str_mv application/pdf
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dc.publisher.none.fl_str_mv C C A M L R Ti
publisher.none.fl_str_mv C C A M L R Ti
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
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repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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