Interannual variation in cephalopod consumption by albatrosses at South Georgia: implications for future commercial exploitation of cephalopods
Assessing the consumption of prey by predators in the marine environment is key to fisheries assessment and management. Although environmental and ecological variations can affect the consumption of certain prey by albatrosses interannually, this issue has not been addressed to date. In the present...
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2007
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ftnerc:oai:nora.nerc.ac.uk:15621 2023-05-15T13:45:11+02:00 Interannual variation in cephalopod consumption by albatrosses at South Georgia: implications for future commercial exploitation of cephalopods Xavier, J.C. Wood, A.G. Rodhouse, P.G. Croxall, J.P. 2007 http://nora.nerc.ac.uk/id/eprint/15621/ http://www.publish.csiro.au/paper/MF06237.htm unknown CSIRO Publishing Xavier, J.C. orcid:0000-0002-9621-6660 Wood, A.G.; Rodhouse, P.G.; Croxall, J.P. 2007 Interannual variation in cephalopod consumption by albatrosses at South Georgia: implications for future commercial exploitation of cephalopods. Marine and Freshwater Research, 58 (12). 1136-1143. https://doi.org/10.1071/MF06237 <https://doi.org/10.1071/MF06237> Marine Sciences Management Ecology and Environment Publication - Article PeerReviewed 2007 ftnerc https://doi.org/10.1071/MF06237 2023-02-04T19:30:00Z Assessing the consumption of prey by predators in the marine environment is key to fisheries assessment and management. Although environmental and ecological variations can affect the consumption of certain prey by albatrosses interannually, this issue has not been addressed to date. In the present study, the interannual consumption of cephalopods by grey-headed and black-browed albatrosses was assessed while breeding at South Georgia between 1996 and 2000, by comparing consumption estimates from a reparameterised version of the South Georgia Seabird Impact Assessment (SGSIA) model. The reparameterised model showed that there are considerable interannual variations in cephalopod consumption in both albatross species, with the highest consumption occurring in 1996 (5787 tonnes; for black-browed albatrosses) and 1997 (11 627 tonnes; for grey-headed albatrosses), and the lowest in 2000 (2309 tonnes and 772 tonnes for grey-headed and black-browed albatrosses respectively). These interannual variations were linked to oceanographic conditions and changes in cephalopod abundance/availability to predators. The cephalopod species with the most commercial potential (Martialia hyadesi, Kondakovia longimana, Moroteuthis knipovitchi and Gonatus antarcticus) also showed considerable differences in their consumption by predators. Owing to the importance of these squid species in the diet of albatrosses, precautionary measures for future commercial exploitation are suggested. Article in Journal/Newspaper Antarc* antarcticus Natural Environment Research Council: NERC Open Research Archive Marine and Freshwater Research 58 12 1136 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Marine Sciences Management Ecology and Environment |
spellingShingle |
Marine Sciences Management Ecology and Environment Xavier, J.C. Wood, A.G. Rodhouse, P.G. Croxall, J.P. Interannual variation in cephalopod consumption by albatrosses at South Georgia: implications for future commercial exploitation of cephalopods |
topic_facet |
Marine Sciences Management Ecology and Environment |
description |
Assessing the consumption of prey by predators in the marine environment is key to fisheries assessment and management. Although environmental and ecological variations can affect the consumption of certain prey by albatrosses interannually, this issue has not been addressed to date. In the present study, the interannual consumption of cephalopods by grey-headed and black-browed albatrosses was assessed while breeding at South Georgia between 1996 and 2000, by comparing consumption estimates from a reparameterised version of the South Georgia Seabird Impact Assessment (SGSIA) model. The reparameterised model showed that there are considerable interannual variations in cephalopod consumption in both albatross species, with the highest consumption occurring in 1996 (5787 tonnes; for black-browed albatrosses) and 1997 (11 627 tonnes; for grey-headed albatrosses), and the lowest in 2000 (2309 tonnes and 772 tonnes for grey-headed and black-browed albatrosses respectively). These interannual variations were linked to oceanographic conditions and changes in cephalopod abundance/availability to predators. The cephalopod species with the most commercial potential (Martialia hyadesi, Kondakovia longimana, Moroteuthis knipovitchi and Gonatus antarcticus) also showed considerable differences in their consumption by predators. Owing to the importance of these squid species in the diet of albatrosses, precautionary measures for future commercial exploitation are suggested. |
format |
Article in Journal/Newspaper |
author |
Xavier, J.C. Wood, A.G. Rodhouse, P.G. Croxall, J.P. |
author_facet |
Xavier, J.C. Wood, A.G. Rodhouse, P.G. Croxall, J.P. |
author_sort |
Xavier, J.C. |
title |
Interannual variation in cephalopod consumption by albatrosses at South Georgia: implications for future commercial exploitation of cephalopods |
title_short |
Interannual variation in cephalopod consumption by albatrosses at South Georgia: implications for future commercial exploitation of cephalopods |
title_full |
Interannual variation in cephalopod consumption by albatrosses at South Georgia: implications for future commercial exploitation of cephalopods |
title_fullStr |
Interannual variation in cephalopod consumption by albatrosses at South Georgia: implications for future commercial exploitation of cephalopods |
title_full_unstemmed |
Interannual variation in cephalopod consumption by albatrosses at South Georgia: implications for future commercial exploitation of cephalopods |
title_sort |
interannual variation in cephalopod consumption by albatrosses at south georgia: implications for future commercial exploitation of cephalopods |
publisher |
CSIRO Publishing |
publishDate |
2007 |
url |
http://nora.nerc.ac.uk/id/eprint/15621/ http://www.publish.csiro.au/paper/MF06237.htm |
genre |
Antarc* antarcticus |
genre_facet |
Antarc* antarcticus |
op_relation |
Xavier, J.C. orcid:0000-0002-9621-6660 Wood, A.G.; Rodhouse, P.G.; Croxall, J.P. 2007 Interannual variation in cephalopod consumption by albatrosses at South Georgia: implications for future commercial exploitation of cephalopods. Marine and Freshwater Research, 58 (12). 1136-1143. https://doi.org/10.1071/MF06237 <https://doi.org/10.1071/MF06237> |
op_doi |
https://doi.org/10.1071/MF06237 |
container_title |
Marine and Freshwater Research |
container_volume |
58 |
container_issue |
12 |
container_start_page |
1136 |
_version_ |
1766215929837912064 |