Résultats de la recherche
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SUMMER SURVEY OF FUR SEALS AT PRINCE EDWARD ISLAND, SOUTHERN INDIAN OCEAN
Abstract: The onshore distributions and the abundances of Antarctic fur seals Arctocephalus ... December 2008. This repeats a survey conducted in December 2001 and extends the area surveyed to include ... the entire south-west coast of Prince Edward Island. Of the two colonies of Antarctic fur seals, the ... Subantarctic fur seals and putative hybrids. The other Antarctic fur seal breeding colony at Penguin Beach ...
Meeting Document : WG-EMM-10/P15 : Auteur(s): M.N. Bester, P.G. Ryan and J. Visagie
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Modelling growth and reproduction of Antarctic krill: implications of spatial and temporal trends in temperature and food for ecosystem-based management of krill fisheries
Abstract: Errors in the growth model used in stock assessments of Antarctic krill, specifically ... higher rates of growth than occur in reality, could inadvertantly lead to over-exploitation of the krill ... population and cause impacts on krill predators. We review the three classes of models available for ... modelling krill growth – the von Bertalanffy class, the moult-cycle class based on measures of the duration ...
Meeting Document : WG-EMM-12/38 : Auteur(s): A.J. Constable and S. Kawaguchi (Australia)
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Density and biomass of Antarctic krill around South Shetland Islands using by 2-dB difference method
Abstract: The dB-difference and characteristics of krill aggregation inhabiting Subarea 48.1 ... , which includes the Elephant Island peripheries and the west and south of the South Shetland Islands ... data were collected along 24 survey lines using the frequencies 38 and 120 kHz, and midwater trawling ... was performed at seven stations. Using the difference between the dB values of two volume ...
Meeting Document : SG-ASAM-17/04 : Auteur(s): S.-G. Choi, K. Lee and D. An
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Proposition de programme de travail en réponse au changement climatique pour la CCAMLR
Abstract: The attached proposed Climate Change Response Work Program addresses the remaining ... Terms of Reference of the Intersessional Correspondence Group (ICG) to develop approaches for ... integrating considerations of the impacts of climate change into the work of CCAMLR (components of TORs 7 and ... 8). It aims to build on related work of the Commission, SC-CAMLR and its working groups, and to link ...
Meeting Document : CCAMLR-XXXVI/20 : Auteur(s): Delegations of Australia and Norway on behalf the Climate Change Intersessional Correspondence Group
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Calculating effective releases and recaptures for stock assessments based on tag detection and tagging mortality indices
developed using a methodology which controls for the spatial and temporal variability of fishing operations ... occurred in the same time and place (i.e. within a specific distance and in the same fishing season). The ... method showed that when the confounding effects of variable fishing location and time were controlled ... , there were nonetheless significant differences between vessels with respect to the tag detection index ...
Meeting Document : WG-SAM-14/30 : Auteur(s): S. Mormede (New Zealand)
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Beach debris survey Signy Island, South Orkney Islands 1999/2000
Abstract: During the 1999/2000 austral summer the tenth annual beach debris survey was carried ... from three study beaches. The debris was counted, measured and classified by type,material, mass and ... size categories. A total of 55 items weighing 10.78kg was collected. The number of items was 35% less ... than 1998/99, and the second lowest ever recorded. The total mass of the waste recovered has decreased ...
Meeting Document : SC-CAMLR-XIX/BG/06 : Auteur(s): Delegation of the United Kingdom
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Educational poster on hook ingestion
Abstract: Since the 2001/2002 season CCAMLR has recognised the importance of the high level of ... large enough to swallow fish heads whole (SC-CAMLRR-XXI/BG/7). For example, in 2001/02 the scientific ... observer on the F/V Argos Helena estimated that >15,000 fish heads were discarded with hooks still in ... them. The hooks found in albatross colonies at South Georgia in years prior to 2001/02 were of the type ...
Meeting Document : WG-FSA-07/20 : Auteur(s): G. Robertson (Australia)
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KPFM2, be careful what you ask for – you just might get it
Abstract: We have substantially revised the krill-predator-fishery model that was presented to ... the WG-EMM in 2005. The new version of our model is called KPFM2, and we have addressed all four of ... the changes which the WG-EMM indicated would be required to use the model for providing advice on the ... allocation of catch among the SSMUs (i.e., add seasonality, consider alternative movement hypotheses, add ...
Meeting Document : WG-EMM-06/22 : Auteur(s): G.M. Watters, J.T. Hinke (USA), K. Reid and S. Hill (United Kingdom)
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Maximum entropy reconstruction of stock distribution and inference of stock density from line-transect acoustic survey data
distribution from acoustic line-transect data. MaxEnt is founded on the bedrock of probability theory and ... allows the most efficient possible use of known data in the inference process. The method takes explicit ... account of spatial correlation in the observed data and seeks to reconstruct a distribution of density ... across the whole survey area that is both consistent with the observed data and for which the entropy is ...
Meeting Document : WG-EMM-02/35 : Auteur(s): A.S. Brierley, S.F. Gull and M.H. Wafy (United Kingdom)
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APPLYING A TS-PROBE FOR MEASURING ANTARCTIC KRILL (EUPHAUSIA SUPERBA) TARGET STRENGTH IN SITU: PROCEDURES AND DATA ANALYSIS
Abstract: A submersible multifrequency acoustic TS-probe was used for measuring the target ... strength of Antarctic krill in situ at short range. The experimental methods, procedure for data retrieval ... operating at 38, 120 and 200 kHz is installed in the probe, connected to three pressure resistant ... transducers with 7o half power beam opening angles. The orientation of the probe was monitored with sensors ...
Meeting Document : SG-ASAM-09/13 : Auteur(s): G. Skaret, L. Calise and E. Ona (Norway)