Further progress on modelling the krill–predator dynamics of the Antarctic ecosystem.
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...
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ftunivcapetownir:oai:localhost:11427/18142 2023-05-15T13:32:18+02:00 Further progress on modelling the krill–predator dynamics of the Antarctic ecosystem. Mori, M Butterworth, Doug S 2006 application/pdf http://hdl.handle.net/11427/18142 https://open.uct.ac.za/bitstream/11427/18142/1/Mori_Further_progress_on_2006.pdf eng eng University of Cape Town Faculty of Science Marine Resource Assessment and Management Group http://hdl.handle.net/11427/18142 https://open.uct.ac.za/bitstream/11427/18142/1/Mori_Further_progress_on_2006.pdf Multi-species modeling Antarctic ecosystem Krill Baleen whales Antarctic fur seals Crabeater seals Working Paper 2006 ftunivcapetownir 2022-09-13T05:54:56Z 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 Report Antarc* Antarctic Antarctic Fur Seals baleen whales Crabeater Seal Crabeater Seals University of Cape Town: OpenUCT Antarctic Butterworth ENVELOPE(66.733,66.733,-70.700,-70.700) The Antarctic |
institution |
Open Polar |
collection |
University of Cape Town: OpenUCT |
op_collection_id |
ftunivcapetownir |
language |
English |
topic |
Multi-species modeling Antarctic ecosystem Krill Baleen whales Antarctic fur seals Crabeater seals |
spellingShingle |
Multi-species modeling Antarctic ecosystem Krill Baleen whales Antarctic fur seals Crabeater seals Mori, M Butterworth, Doug S Further progress on modelling the krill–predator dynamics of the Antarctic ecosystem. |
topic_facet |
Multi-species modeling Antarctic ecosystem Krill Baleen whales Antarctic fur seals Crabeater seals |
description |
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 |
format |
Report |
author |
Mori, M Butterworth, Doug S |
author_facet |
Mori, M Butterworth, Doug S |
author_sort |
Mori, M |
title |
Further progress on modelling the krill–predator dynamics of the Antarctic ecosystem. |
title_short |
Further progress on modelling the krill–predator dynamics of the Antarctic ecosystem. |
title_full |
Further progress on modelling the krill–predator dynamics of the Antarctic ecosystem. |
title_fullStr |
Further progress on modelling the krill–predator dynamics of the Antarctic ecosystem. |
title_full_unstemmed |
Further progress on modelling the krill–predator dynamics of the Antarctic ecosystem. |
title_sort |
further progress on modelling the krill–predator dynamics of the antarctic ecosystem. |
publisher |
University of Cape Town |
publishDate |
2006 |
url |
http://hdl.handle.net/11427/18142 https://open.uct.ac.za/bitstream/11427/18142/1/Mori_Further_progress_on_2006.pdf |
long_lat |
ENVELOPE(66.733,66.733,-70.700,-70.700) |
geographic |
Antarctic Butterworth The Antarctic |
geographic_facet |
Antarctic Butterworth The Antarctic |
genre |
Antarc* Antarctic Antarctic Fur Seals baleen whales Crabeater Seal Crabeater Seals |
genre_facet |
Antarc* Antarctic Antarctic Fur Seals baleen whales Crabeater Seal Crabeater Seals |
op_relation |
http://hdl.handle.net/11427/18142 https://open.uct.ac.za/bitstream/11427/18142/1/Mori_Further_progress_on_2006.pdf |
_version_ |
1766025683085033472 |