Résultats de la recherche

1. Performance metrics to index the spatial coverage of mark-recapture data

   Abstract:  Understanding the spatial distribution of the release of tagged fish and the subsequent ... spatial coverage of fishing effort to recapture tagged fish is an important consideration when ... measures of spatial overlap and potential bias in the development of tag-based biomass estimates are an ... statistics: (i) a single measure of the degree of spatial overlap between the release of tagged fish and ...

   Meeting Document : WG-SAM-16/13 : Auteur(s): C. Marsh, A. Dunn and S. Mormede

2. Classification of Southern Ocean krill and icefish echoes using Random Forests

   Abstract:  Target identification remains a challenge for acoustic surveys of marine fauna ... . Antarctic krill, Euphausia superba, are typically identified through a combination of expert scrutiny of ... echograms and analysis of differences in mean volume backscattering strengths (S V; dB re 1 m-1) measured at ... icefish are currently surveyed using bottom-trawls, but the resultant estimates of abundance may be biased ...

   Meeting Document : WG-EMM-16/23 : Auteur(s): N. Fallon, S. Fielding and P. Fernandes

3. Size and stage composition of age class 0 Antarctic krill (Euphausia superba) in the ice-water interface layer during winter/early spring

   Abstract:  The condition and survival of Antarctic krill (Euphausia superba) strongly depends on ... developmental stage. A comprehensive understanding of sea ice habitat use by krill, however, remains largely ... unknown. The aim of this study was to improve the understanding of the krill's interaction with the ... sea ice habitat during winter/early spring by conducting large-scale sampling of the ice-water ...

   Meeting Document : WG-EMM-16/P16 : Auteur(s): F. Schaafsma, C. David, E. Pakhomov, B. Hunt, B. Lange, H. Flores, J.A. van Franeker

4. Informing the Working Group on Fish Stock Assessment about the revisions of the WSMPA proposal

   Abstract:  Following the submission of a first draft Conservation Measure for establishing a MPA ... proposal, which would fall under the remit of, or might be of interest to participants at FSA 2018 ... coast of the Antarctic Peninsula; Adjustment of the habitat of adult Antarctic toothfish in Statistical ... Subareas 48.6 and 48.5 because of further analyses and modelling of the habitat of adult Antarctic ...

   Meeting Document : WG-FSA-18/08 Rev. 1 : Auteur(s): S. Hain, K. Teschke, H. Pehlke and T. Brey on behalf of the German Weddell Sea MPA project team

5. Otolith chemistry reveals local population structure of Antarctic toothfish (Dissostichus mawsoni) within the CCAMLR Subarea 48.6

   and economical value and that distributed in the high latitude of the Southern Ocean. The CCAMLR ... subarea 48.6 is one of an important fishing zone, however, the local population structure of D. mawsoni is ... unknown in this regions, which hampered the understanding on population dynamics of this species and the ... management of toothfish fishery. The chemistry in the otolith can often be used to distinguish population ...

   Meeting Document : WG-FSA-18/75 : Auteur(s): L. Wei, G.P. Zhu, S. Somhlaba, X.Y. Yu and M. Duan

6. Advances are urgently needed in providing regular estimates of krill stock status based on the available data

   measure (the trigger level) which was established in 1991 and is “not related to the status of the krill ... trigger level is not related to the status of the stock. The establishing terms of reference for WG-EMM ... include requests to “assess the status of krill” and “develop management advice … for management of krill ... fisheries”. Although WG-EMM is now a quarter century old, it rarely assesses the status of the krill stock ...

   Meeting Document : WG-EMM-2019/28 : Auteur(s): S. Hill, J. Hinke, N. Ratcliffe, P. Trathan and G. Watters

7. Entanglement of Antarctic fur seals (Arctocephalus gazella) by man made debris at Bird Island, South Georgia, during the 2005 winter and 2005/06 breeding season

   Abstract:  Results of the survey of entanglements of Antarctic fur seals at Bird Island, South ... reported here. Two entanglements were observed in the winter, a decrease of 60% from the previous year, and ... the lowest number seen since records began in 1990. One of these involved a male pup entangled in ... individual involved. In contrast there was double the number of observed entanglements during summer of 2005 ...

   Meeting Document : SC-CAMLR-XXV/BG/13 : Auteur(s): Delegation of the United Kingdom

8. Assessment of stone crab (Lithodidae) density on the South Georgia slope using baited video cameras

   of 719-1518 m around the sub-Antarctic island of South Georgia. Four species of lithodid (Anomura ... to the baits of which Paralomis formosa was the most abundant. Using arrival rate at baits ... , predictions of odour plume size and observations of walking speed the abundance of the stone crab Paralomis ... formosa was estimated. Numbers of crabs increased rapidly following bait emplacement, with total numbers ...

   Meeting Document : WG-FSA-03/77 : Auteur(s): M.A. Collins, C. Yau, F. Guillfoyle, P. Bagley, I. Everson, I.G. Priede and D. Agnew (United Kingdom)

9. Assessment of stone crab (Lithodidae) density on the South Georgia slope using baited video cameras

   of 719-1518 m around the sub-Antarctic island of South Georgia. Four species of lithodid (Anomura ... to the baits of which Paralomis formosa was the most abundant. Using arrival rate at baits ... , predictions of odour plume size and observations of walking speed the abundance of the stone crab Paralomis ... formosa was estimated. Numbers of crabs increased rapidly following bait emplacement, with total numbers ...

   Meeting Document : WG-FSA-03/77 Text : Auteur(s): M.A. Collins, C. Yau, F. Guillfoyle, P. Bagley, I. Everson, I.G. Priede and D. Agnew (United Kingdom)

10. CCAMLR measures regulating the tagging of Dissostichus species, metrics used to assess vessel tagging performance, the potential for some anomalous results, and general recommendations on tagging; a view from the hauling room

    performance measures implemented by CCAMLR to control and monitor the tagging of toothfish (Dissostichus ... first season of implementation we describe several circumstances which will cause anomalies in the tag ... distribution of Dissostichus species within the assessed management division (ASD) or changes in the tagging ... rate within sub areas of the assessed ASD.  The current level of two tonnes of Dissostichus catch ...

    Meeting Document : WG-FSA-11/50 : Auteur(s): J.M. Fenaughty (New Zealand) and J. Brown (United Kingdom)

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