Reference observations for validating and tuning operating models for krill fishery management in area 48
In 2007 WG-SAM defined a set of reference observations for validating and tuning proposed models to evaluate krill catch allocation options for Area 48 (the SAM calendar). The observations, which were endorsed by WG-EMM, were largely qualitative and relative. We used available data to translate thes...
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ftunivcapetownir:oai:localhost:11427/18547 2023-05-15T15:37:09+02:00 Reference observations for validating and tuning operating models for krill fishery management in area 48 Hill, Simeon Hinke, Jefferson Plagányi, Eva Watters, George 2008 application/pdf http://hdl.handle.net/11427/18547 https://open.uct.ac.za/bitstream/11427/18547/1/Hill_Reference_observations_for_2008.pdf eng eng University of Cape Town Faculty of Science Marine Resource Assessment and Management Group http://hdl.handle.net/11427/18547 https://open.uct.ac.za/bitstream/11427/18547/1/Hill_Reference_observations_for_2008.pdf operating models krill fishery management Working Paper 2008 ftunivcapetownir 2022-09-13T05:56:50Z In 2007 WG-SAM defined a set of reference observations for validating and tuning proposed models to evaluate krill catch allocation options for Area 48 (the SAM calendar). The observations, which were endorsed by WG-EMM, were largely qualitative and relative. We used available data to translate these observations into numerical terms (the numerical calendar). We provide spatially-resolved reference points for the density of krill, and the abundance of “generic” seals, penguins and whales in 1970, 2007 and at least one intermediate year. Recent work on baleen whales indicates a higher growth rate than that suggested by WG-SAM, so the numerical calendar for this taxon deviates from the SAM calendar. The numerical calendar is a partly subjective interpretation of limited data and should not be considered a definitive description of the relevant dynamics. This exercise resulted in population sizes for several taxa that are adjusted for asynchronous observations and are potentially more suitable for initialising models than those published in Hill et al (2007). Report baleen whales University of Cape Town: OpenUCT |
institution |
Open Polar |
collection |
University of Cape Town: OpenUCT |
op_collection_id |
ftunivcapetownir |
language |
English |
topic |
operating models krill fishery management |
spellingShingle |
operating models krill fishery management Hill, Simeon Hinke, Jefferson Plagányi, Eva Watters, George Reference observations for validating and tuning operating models for krill fishery management in area 48 |
topic_facet |
operating models krill fishery management |
description |
In 2007 WG-SAM defined a set of reference observations for validating and tuning proposed models to evaluate krill catch allocation options for Area 48 (the SAM calendar). The observations, which were endorsed by WG-EMM, were largely qualitative and relative. We used available data to translate these observations into numerical terms (the numerical calendar). We provide spatially-resolved reference points for the density of krill, and the abundance of “generic” seals, penguins and whales in 1970, 2007 and at least one intermediate year. Recent work on baleen whales indicates a higher growth rate than that suggested by WG-SAM, so the numerical calendar for this taxon deviates from the SAM calendar. The numerical calendar is a partly subjective interpretation of limited data and should not be considered a definitive description of the relevant dynamics. This exercise resulted in population sizes for several taxa that are adjusted for asynchronous observations and are potentially more suitable for initialising models than those published in Hill et al (2007). |
format |
Report |
author |
Hill, Simeon Hinke, Jefferson Plagányi, Eva Watters, George |
author_facet |
Hill, Simeon Hinke, Jefferson Plagányi, Eva Watters, George |
author_sort |
Hill, Simeon |
title |
Reference observations for validating and tuning operating models for krill fishery management in area 48 |
title_short |
Reference observations for validating and tuning operating models for krill fishery management in area 48 |
title_full |
Reference observations for validating and tuning operating models for krill fishery management in area 48 |
title_fullStr |
Reference observations for validating and tuning operating models for krill fishery management in area 48 |
title_full_unstemmed |
Reference observations for validating and tuning operating models for krill fishery management in area 48 |
title_sort |
reference observations for validating and tuning operating models for krill fishery management in area 48 |
publisher |
University of Cape Town |
publishDate |
2008 |
url |
http://hdl.handle.net/11427/18547 https://open.uct.ac.za/bitstream/11427/18547/1/Hill_Reference_observations_for_2008.pdf |
genre |
baleen whales |
genre_facet |
baleen whales |
op_relation |
http://hdl.handle.net/11427/18547 https://open.uct.ac.za/bitstream/11427/18547/1/Hill_Reference_observations_for_2008.pdf |
_version_ |
1766367613996236800 |