Resultados de la búsqueda
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Revision of the fishery–foraging overlap model
Secretariat was tasked with the revision of the model, including modifications to the model in terms of both ... adjustments to temporal aspects of the underlying model and changes in the form of the index of overlap. The ... Abstract: The fishery-foraging model of Agnew and Phegan (1995) was reviewed by the Working Group ... on Ecosystem Monitoring and Management and its Subgroup on Statistics in 1997. The review found that ...
Meeting Document : WG-EMM-98/05 : Autor(es): Secretariat
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Performance metrics to index the spatial coverage of mark-recapture data
measures of spatial overlap and potential bias in the development of tag-based biomass estimates are an ... measure of the potential bias in the biomass estimate calculated from non-homogenous spatial mark ... include a measure of the total spatial distribution of effort through time in research or developing ... fisheries, and a measure of the change in bias of mark-recapture estimates through time. Author(s): C ...
Meeting Document : WG-SAM-16/13 : Autor(es): C. Marsh, A. Dunn and S. Mormede
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Climate change and the role of CCAMLR
adapting fishing strategies. ASOC advocates that the role of CCAMLR in the climate change context continues ... 5) providing leadership in reducing the emissions of greenhouse gases during the course of fishing ... Abstract: Abstract Fishing magnifies the sensitivity of ecosystems to the effects of climate ... change. In the Southern Ocean, CCAMLR has the capacity to reduce this sensitivity by appropriately ...
Meeting Document : CCAMLR-XXIX/BG/19 : Autor(es): ASOC Observer
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Potential climate change effects on the habitat of Antarctic krill
in growth habitat within the range of predators, such as Antarctic fur seals, foraging from breeding ... than the direct effects of warming. A reduction in primary production could lead to further habitat ... degradation but even a 50% increase in chlorophyll would not completely negate the degradation of habitat ... resource and a major prey item for many fish, birds and mammals in the Southern Ocean. The fishery and the ...
Meeting Document : WG-EMM-13/20 : Autor(es): S.L. Hill, T. Phillips and A. Atkinson (United Kingdom)
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A TALE OF TWO ISLANDS: CONTRASTING FORTUNES FOR SUBANTARCTIC SKUAS AT THE PRINCE EDWARD ISLANDS
in 2008, whereas the number of skua nests on Marion Island was barely half that counted in 2001 ... removal of cats from Marion Island in the early 1990s has benefited the major native predator of burrowing ... -Antarctic islands, and can be used to monitor the health of burrowing petrel populations. A survey of skuas ... at the Prince Edward Islands was conducted during December 2008, repeating a previous survey in ...
Meeting Document : WG-EMM-10/P3 : Autor(es): P.G. Ryan, P.A. Whittington and R.J.M. Crawford
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Fish Heaven: a Monte Carlo, spatially explicit single species fishery model for the testing of parameter estimation methods
object oriented framework to allow for the possible extension in a number of directions. In particular it ... complete it is still seen as a piece of software in development. Currently the software is designed to ... package, reading in the output files of Fish Heaven. A number of extensions are planned for the software ... and these are described in the appropriate sections of the manual as 'further improvements' ...
Meeting Document : WG-FSA-00/36 : Autor(es): I. Ball and A. Constable (Australia)
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Development of the Southern Ocean Continuous Plankton Recorder survey
very high abundance of zooplankton in the uppermost 20 m of the permanently open ocean zone between the ... Abstract: The Continuous Plankton Recorder (CPR) Type I was first used in Antarctic waters during ... the 1925–1927 Discovery Expedition, and has been used successfully for 70 years to monitor plankton in ... to Antarctic waters when the Australian Antarctic Division initiated a survey of the Southern Ocean ...
Meeting Document : WS-BSO-07/P4 : Autor(es): Hosie, G., M. Fukuchi and S. Kawaguchi
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A tale of two islands: contrasting fortunes for sub-Antarctic skuas at the Prince Edward Islands
coverage in 2008, whereas the number of skua nests on Marion Island was barely half that counted in 2001 ... removal of cats from Marion Island in the early 1990s has benefited the major native predator of burrowing ... -Antarctic islands, and can be used to monitor the health of burrowing petrel populations. A survey of skuas ... at the Prince Edward Islands was conducted during December 2008, repeating a previous survey in ...
Meeting Document : WG-EMM-10/P03 : Autor(es): P.G. Ryan, P.A. Whittington and R.J.M. Crawford
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Long term movements and activity patterns of an Antarctic marine apex predator: the leopard seal
advance in our limited knowledge of leopard seals. We show the longest periods of tracking of leopard ... , similar to those observed in other predators in the region including the krill fishery. Analysis of ... dynamics of the region’s fisheries, shows an understanding of leopard seal ecology is vital in the ... ecosystems through local predation. Here we report on the successful use of micro geolocation logging sensor ...
Meeting Document : WG-EMM-18/P09 : Autor(es): I.J. Staniland, N. Ratcliffe, P.N. Trathan and J. Forcada
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Climate Change, Longevity Overfishing and Precautious Management of the Area 88 Toothfish Fishery
of this species to climate-related factors; and 3) an increase in that sensitivity owing to the ... Abstract: Three aspects of current management of the “exploratory” Antarctic toothfish ... (Dissostichus mawsoni) fishery in Area 88 indicates that less-than-full precaution is being exercised in the ... targeted removal of the oldest, most successful and most fecund toothfish. The current strategy is to ...
Meeting Document : WG-FSA-09/07 : Autor(es): D. Ainley (USA), M. Massaro, G. Ballard (New Zealand) and J.T. Eastman (USA)