Search results
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Population and survival trends of wandering albatrosses (Diomedea exulans) breeding on Macquarie Island
with information from an intensive demographic study conducted between 1994 and 2003. Annual breeding ... effort and survival varied markedly with breeding numbers declining from a peak in 1964 to near ... and, to a lesser extent, adult survival. These survival changes were coincident with changes in ... . Trends in population numbers and survival are similar to that observed in other populations in the Indian ...
Meeting Document : WG-FSA-04/50 : Author(s): A. Terauds, R. Gales, R. Alderman and G.B. Baker (Australia)
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REPORT ON A RANDOM STRATIFIED TRAWL SURVEY TO ESTIMATE DISTRIBUTION AND ABUNDANCE OF DISSOSTICHUS ELEGINOIDES AND CHAMPSOCEPHALUS GUNNARI IN THE HEARD ISLAND REGION (DIVISION 58.5.2) FOR 2008 AND 2009
generally reduced from the previous year’s survey, with the catch of toothfish being one third ... , with the catches of toothfish and icefish being four and five times higher respectively, and catches of skates ... being twice that of the 2008 level. The 2009 catches were closer to the average of the previous three ... from the previous year’s survey, with the catch of toothfish being one third ...
Meeting Document : WG-FSA-09/34 : Author(s): G.B. Nowara (Australia)
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Long term movements and activity patterns of an Antarctic marine apex predator: the leopard seal
Abstract: Leopard seals are an important Antarctic apex predator that can affect marine ... island of South Georgia. It appears that these tracked animals migrate in a directed manner towards Bird ... shallow shelf water and regions of sea ice. Wet and dry sensors revealed that seals hauled out for between ... 22 and 31% of the time with maximum of 74 hours and a median of between 9 and 11 hours. The longest ...
Meeting Document : WG-EMM-18/P09 : Author(s): I.J. Staniland, N. Ratcliffe, P.N. Trathan and J. Forcada
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Foraging dynamics of macaroni penguins (Eudyptes chrysolophus) at South Georgia during brood-guard
inform management models currently being developed for Antarctic krill fisheries, a potential competitor ... inform management models currently being developed for Antarctic krill fisheries, a potential competitor ...
Meeting Document : WG-EMM-06/P4 : Author(s): P.N. Trathan, C. Green, J. Tanton, H. Peat, J. Poncet and A. Morton (United Kingdom)
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STRONG EFFECTS OF ENVIRONMENTAL CONDITIONS ON REPRODUCTIVE SUCCESS OF PENGUINS AT KING GEORGE ISLAND
Abstract: Generalized linear and additive models suggest that large proportions of inter-annual ... variability in the reproductive success of Adélie, gentoo, and chinstrap penguins can be explained by simple ... ice extent measured during the winter prior to breeding also appears to be an important predictor of ...
Meeting Document : WG-EMM-09/43 : Author(s): J. Hinke, C. Reiss and W. Trivelpiece (USA)
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An assessment of the mackerel icefish (Champsocephalus gunnari) off Heard Island
of maturity and a weight length relationship. The results show that characteristics of icefish ... populations on the Heard plateau are sufficiently different from those on Shell Bank for them to be managed ... separately. Precautionary catch limits calculated using the Generalised Yield model are found to be 180 ...
Meeting Document : WG-FSA-97/29 : Author(s): de la Mare, W.K., Constable, A., Williams, R.
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Quantifying habitat use in satellite-tracked pelagic seabirds: application of kernel estimation to albatross locations
one species overlapping with that of the other. Author(s): A.G. Wood (United Kingdom), B. Naef ... two species covers an estimated 440,000 and 640,000 km2 respectively, with very substantial overlap ... . In contrast, kernel estimation reveals that the main foraging areas of these two sympatric ... , the foraging areas cover c.81,500 and c.119,700 km2 respectively, with 42 % and 50 % of the range of ...
Meeting Document : WG-FSA-99/19 : Author(s): A.G. Wood (United Kingdom), B. Naef-Daenzer (Switzerland), P.A. Prince and J.P. Croxall (United Kingdom)
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Quantifying habitat use in satellite-tracked pelagic seabirds: application of kernel estimation to albatross locations
overlapping with that of the other. Author(s): A.G. Wood (United Kingdom), B. Naef-Daenzer (Switzerland), P.A ... species covers an estimated 440 000 and 640 000 km 2, respectively, with very substantial overlap. In ... contrast, kernel estimation reveals that the main foraging areas of these two sympatric, congeneric species ... areas cover c. 81 500 and c. 119 700 km 2, respectively, with 42% and 50% of the range of one species ...
Meeting Document : WG-EMM-01/67 : Author(s): A.G. Wood (United Kingdom), B. Naef-Daenzer (Switzerland), P.A. Prince and J.P. Croxall (United Kingdom)
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Estimates of local biomass, including estimates of uncertainty, for Antarctic (Dissostichus mawsoni) and Patagonian (Dissostichus eleginoides) toothfish in research blocks in Subareas 48.2, 48.6, 58.4 and 88.3
Abstract: This paper includes updated local biomass estimates of toothfish populations with ... at WG-SAM-16 with revisions to the CPUE-by-seabed area parameter values agreed at WG-SAM-17. The ... -seabed area method parameter values that were agreed at WG-SAM-17, the estimates of biomass in the ... relevant Research Blocks have increased relative to the estimates that were presented at WG-FSA-16. The ...
Meeting Document : WG-FSA-17/42 : Author(s): CCAMLR Secretariat
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A model at the level of the foraging trip for the indirect effects of krill (Euphausia superba) fisheries on krill predators
with slopes less than 1; that is, reductions in reproductive success and parental survival are linear ... indirect effects of the fishery on penguin reproduction and survival. As with all models, there is ... generate the long-term frequency distribution of krill biomass. Furthermore, we assume that there is ... distribution of available krill. 4. We assume that after fledging, offspring survival depends in part upon the ...
Meeting Document : WG-EMM-96/20 : Author(s): Switzer, P.V., Mangel, M.