Résultats de la recherche

1. Population change in gentoo penguins Pygoscelis papua at South Georgia: potential roles of adult survival, recruitment and deferred breeding

   survival and recruitment rates, to model the fluctuations in breeding populations, taking account of ... variations introduced by good and bad years (as classified on the basis of breeding success). There is ... conditions. Comparing model and reality indicates that deferred breeding could account for the discrepancy in ... one year, and for part of the differences in two other years, when mortality rates must also have been ...

   Meeting Document : WG-CEMP-93/08 : Auteur(s): J.P. Croxall and P. Rothery (United Kingdom)

2. First increment validation of Patagonian toothfish (Dissostichus eleginoides) from Heard Island

   represent annual events, no direct validation has been provided for the early growth of this species. In an ... one opaque and one translucent increment is formed each year on the sectioned face of sagittal ... assumed to cause interpretation differences was the position of the first increment that corresponded with ... the end of the first year of growth. While there is a general consensus that the observed increments ...

   Meeting Document : WG-FSA-05/61 : Auteur(s): K. Krusic-Golub, C. Green and R. Williams (Australia)

3. Seabird interaction with long-lining operations for Dissostichus eleginoides around South Georgia, April and May 1994

   mortalities recorded over twenty sets of the line; no mortalities occurred during hauls. The 16 sets made at ... night contributed 15% of the overall mortality, all of white-chinned petrels: the four day time sets ... decline, were disproportionately affected in relation to their numbers in the vicinity of the fishing ... vessel; giant petrels also may be disproportionately affected, at least in relation to the size of their ...

   Meeting Document : WG-IMALF-94/15 : Auteur(s): J.R. Ashford, J.P. Croxall (United Kingdom), P.S. Rubilar and C.A. Moreno (Chile)

4. Extinction risk of Antarctic and sub-Antarctic colonies of Pygoscelid penguins under climate change context

   Abstract:  Several studies have emphasized the variable abundance of Pygoscelid penguins from ... different colonies around Antarctica. In this study, the extinction risk of Adélie, Chinstrap and Gentoo ... penguins was evaluated in order to identify the most endangered colonies under present-day and future ... environmental scenarios. The extinction risk was estimated for twelve colonies from environmentally contrasting ...

   Meeting Document : WG-EMM-2019/74 : Auteur(s): M. Huerta and S.A. Estay

5. Proposals on standardization of toothfish resource research

   Abstract:  The methodology of modern trawl surveys carried out the ICES responsibility area is ... discussed in the context of discussion at the Scientific Committee and the CCAMLR Commission in 2018 ... regarding the longline survey methodology in Division 58.4.1. It is shown that the methodology of modern ... bottom trawl surveys requires a standardized design of the spatial location of trawl samples and standard ...

   Meeting Document : WG-SAM-2019/34 : Auteur(s): S. Kasatkina

6. Preliminary report on invertebrate by-catch in research blocks 58.4.1, 58.4.2, 54.4.3a and 58.4.4b

   indicators have been recorded as part of the C2 and also as part of observers data since CM 22.07 has been ... Workflow Status:  Content Approved Document Release Consent:  No Delegation responsibility for releasing ...

   Meeting Document : WG-FSA-18/51 : Auteur(s): M. Eléaume, C. Chazeau, A. Martin and J. Blettery

7. Integrated weight longlines with paired streamer lines – best management practice for demersal longline fisheries: preliminary results

   Abstract:  Minimizing the time gear is available to seabirds by increasing the sink rate of ... mitigation trials targeting Pacific cod in the Bering Sea, Alaska, USA. Our objective was to evaluate IW as a ... behaviour, sink rate of the gear and breaking strength. All mitigation technologies dramatically decreased ... seabird bycatch rates while having little to no effect on fish catch rates. Sink rate measurements ...

   Meeting Document : WG-FSA-06/52 : Auteur(s): K. Dietrich, E. Melvin and L. Conquest (USA)

8. Distributions and predator-prey interactions of macaroni penguins, Antarctic fur seals, and Antarctic krill near Bird Island, South Georgia

   abundances but not of the abundance of macaroni penguins. 'We found no evidence that the fur seals or ... Abstract:  We studied the distributions, abundances and interactions of macaroni penguins Eudyptes ... transects radiating from the breeding colonies of the vertebrate predators. We examined the relationships ... between the distributions of predators and their prey with respect to the abundance of krill in the water ...

   Meeting Document : WG-CEMP-93/12 : Auteur(s): G.L. Hunt, Jr (USA), D. Heinemann (USA) and I. Everson (United Kingdom)

9. Demersal longlines with integrated weight: a preliminary assessment of sink rates, fish catch success and operational effects

   . No operational effects of using IW lines were evident during the trial. IW longlines containing 50 g ... lines with weigh integrated into the rope fibres. The sink rates to 15 m depth of 9 mm demersal ... attached weights (6 kg/49 m) in the New Zealand ling fishery. Longlines with 0 g/m (unweighted), 25 g/m, 50 ... 0.353 m/s, respectively. The longline with externally attached weights sank at 0.32 m/s. IW longlines ...

   Meeting Document : WG-FSA-02/22 : Auteur(s): G. Robertson (Australia), M. McNeill, B. King (New Zealand) and R. Kristensen (Norway)

10. Long-term observations from Antarctica demonstrate that mismatched scales of fisheries management and predator–prey interaction lead to erroneous conclusions about precaution

    that can help conserve marine predators. Uncertainty about the impacts of fisheries removals on ... dependent predators bolsters this perspective, but consideration of the spatio-temporal scales over which ... are as precautionary as presumed. Antarctic krill are targeted by the largest fishery in the Southern ... penguin performance are predicted to be below the long-term average with a probability of 0.77. Catch ...

    Meeting Document : WG-EMM-2019/11 : Auteur(s): G.M. Watters, J.T. Hinke and C.S. Reiss

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