Further progress on modelling the krill–predator dynamics of the Antarctic ecosystem.

 

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dc.contributor.author Mori, M
dc.contributor.author Butterworth, Doug S
dc.date.accessioned 2016-03-22T08:34:58Z
dc.date.available 2016-03-22T08:34:58Z
dc.date.issued 2006
dc.identifier.citation Mori, M., & Butterworth, D. S. (2006). Further progress on modelling the krill predator dynamics of the Antarctic ecosystem. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/18142
dc.description.abstract This paper addresses work conducted on the Mori-Butterworth multi-species model of the Antarctic ecosystem subsequent to the Ulsan meeting of the Scientific Committee. Points raised about the model during that meeting are addressed in turn. Results are quoted that suggest that krill is indeed unable to fully utilise the primary production available. The precision of parameters estimated when fitting the model to abundance and trend data is reported. The model is extended to include an “other predators” variable (reflecting squid, fish and seabirds) so that the crabeater seal variable does not have to act as a surrogate for these in addition to the seals themselves. This results in an improved fit of the model to available abundance estimates for crabeater seals. A list of topics for possible further work on the model is presented. The development of an improved set of abundance and trend estimates for the various krill predators is seen as a priority for improving the reliability of current models, and it is suggested that this should be a key focus of the proposed joint IWC-CCAMLR workshop on this topic en_ZA
dc.language eng en_ZA
dc.subject.other Multi-species modeling
dc.subject.other Antarctic ecosystem
dc.subject.other Krill
dc.subject.other Baleen whales
dc.subject.other Antarctic fur seals
dc.subject.other Crabeater seals
dc.title Further progress on modelling the krill–predator dynamics of the Antarctic ecosystem. en_ZA
dc.type Working Paper en_ZA
dc.date.updated 2016-03-22T08:30:57Z
uct.type.publication Research en_ZA
uct.type.resource Research paper en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Marine Resource Assessment and Management Group en_ZA
uct.type.filetype Text
dc.identifier.apacitation Mori, M., & Butterworth, D. S. (2006). <i>Further progress on modelling the krill–predator dynamics of the Antarctic ecosystem</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group. Retrieved from http://hdl.handle.net/11427/18142 en_ZA
dc.identifier.chicagocitation Mori, M, and Doug S Butterworth <i>Further progress on modelling the krill–predator dynamics of the Antarctic ecosystem.</i> University of Cape Town ,Faculty of Science ,Marine Resource Assessment and Management Group, 2006. http://hdl.handle.net/11427/18142 en_ZA
dc.identifier.vancouvercitation Mori M, Butterworth DS. Further progress on modelling the krill–predator dynamics of the Antarctic ecosystem. 2006 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/18142 en_ZA
dc.identifier.ris TY - Working Paper AU - Mori, M AU - Butterworth, Doug S AB - This paper addresses work conducted on the Mori-Butterworth multi-species model of the Antarctic ecosystem subsequent to the Ulsan meeting of the Scientific Committee. Points raised about the model during that meeting are addressed in turn. Results are quoted that suggest that krill is indeed unable to fully utilise the primary production available. The precision of parameters estimated when fitting the model to abundance and trend data is reported. The model is extended to include an “other predators” variable (reflecting squid, fish and seabirds) so that the crabeater seal variable does not have to act as a surrogate for these in addition to the seals themselves. This results in an improved fit of the model to available abundance estimates for crabeater seals. A list of topics for possible further work on the model is presented. The development of an improved set of abundance and trend estimates for the various krill predators is seen as a priority for improving the reliability of current models, and it is suggested that this should be a key focus of the proposed joint IWC-CCAMLR workshop on this topic DA - 2006 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2006 T1 - Further progress on modelling the krill–predator dynamics of the Antarctic ecosystem TI - Further progress on modelling the krill–predator dynamics of the Antarctic ecosystem UR - http://hdl.handle.net/11427/18142 ER - en_ZA


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