Resultados de la búsqueda
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Entanglement of Antarctic fur seals (Arctocephalus gazella) in man-made debris at Signy Island, South Orkney Islands, 2004/05
Abstract: The results of the ninth annual survey of entanglement of Antarctic fur seals at Signy ... ground. The incidence of entanglement at Signy Island, albeit very low, highlights the need for CCAMLR ... prohibiting the disposal of man-made debris at sea. Author(s): Delegation of the United Kingdom Title ... : Entanglement of Antarctic fur seals (Arctocephalus gazella) in man-made debris at Signy Island, South Orkney ...
Meeting Document : SC-CAMLR-XXIV/BG/18 : Autor(es): Delegation of the United Kingdom
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The age structure and growth rate of Patagonian toothfish (Dissostichus eleginoides) at South Georgia
Abstract: New length-at – age data for South Georgia toothfish are presented from a range of ... are similar to values obtained in previous studies at South Georgia and other sub-Antarctic islands ... . Evidence for the separation of early year classes is presented along with mean sizes for each age class ... . Age length keys indicate that fish enter the fishery at 7 years and are fully recruited at between 10 ...
Meeting Document : WG-FSA-04/86 : Autor(es): M. Belchier (United Kingdom)
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Progress on the application of an age-structured production model fitted to commercial catch-rate and catch-at-length data to assess the toothfish (Dissostichus eleginoides) resource in the Prince Edward Island vicinity
allow the estimation of a selectivity-at-age function that decreases at larger ages. This is, in ... on the application of an age-structured production model fitted to commercial catch-rate and catch-at ... particular, to accommodate the view of the August 2003 meeting of the Subgroup on assessment methods that 0.2 ... yr-1 is likely the largest value of natural mortality M that is plausible for toothfish. Catch, catch ...
Meeting Document : WG-FSA-03/97 : Autor(es): A. Brandão and D.S. Butterworth (South Africa)
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Relationships between the distribution of whales and Antarctic krill Euphausia superba at South Georgia
and krill was examined at a number of spatial scales. There was a positive relationship between whale ... Abstract: The distribution of whales and krill in two survey boxes north of South Georgia was ... examined by comparing sightings and underway acoustic data collected as part of a multidisciplinary ... research cruise during January/February 1998. A total of 222 cetaceans of 10 species was recorded with ...
Meeting Document : WG-EMM-99/30 : Autor(es): K. Reid, A.S. Brierley (United Kingdom) and G.A. Nevitt (USA)
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Age validation of juvenile Notothenia rossii at Potter Cove, South Shetland Islands, using mark-recapture data
comparative analysis between scales taken at recapture and otoliths of the same individual allowed a ... Title: Age validation of juvenile Notothenia rossii at Potter Cove, South Shetland Islands, using mark ... Abstract: Among all validation methods of age determination in fish, release of known age and ... Notothenia rossii at Potter Cove, to validate, for first time for this species using this method, the ...
Meeting Document : WG-FSA-13/P01 : Autor(es): E. Moreira, E. Barrera-Oro and M. La Mesa
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Population dynamics of black-browed and grey-headed albatrosses Diomedea melanophris and D. chrysostoma at Bird Island, South Georgia
Abstract: Population dynamics of Black-browed and Grey-headed Albatrosses were studied at Bird ... Albatross colonies decreased, at an average rate of 1.8% per annum. Although the total Black-browed ... Albatross population increased (at 0.8% pa.), 14 of the 23 colonies (including both study colonies ... ) decreased. Black-browed Albatrosses follow an annual breeding cycle, with over 80% of birds successful in ...
Meeting Document : SC-CAMLR-XII/BG/21 : Autor(es): Delegation of United Kingdom
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Diet of grey-headed albatrosses at the Diego Ramírez Islands, Chile: ecological implications
Abstract: The diet of grey-headed albatrosses at Diego Ramírez, Chile, was analyzed and compared ... suggests that M. hyadesi plays an important role in the breeding performance of grey-headed albatrosses at ... Diego Ramírez. Low presence of M. hyadesi in grey-headed albatrosses’ diet at South Georgia in 2000, a ... to that of the sympatric black-browed albatross. Diet composition was inferred from an analysis of ...
Meeting Document : WG-FSA-04/12 : Autor(es): J. Arata (Chile), G. Robertson (Australia), J. Valencia (Chile), J.C. Xavier (UK) and C.A. Moreno (Chile)
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Entanglement of Antarctic fur seals Arctocephalus gazella in man-made debris at Bird Island, South Georgia during the 1992 winter and 1992/93 pup-rearing season
males, the main element of the population seen ashore at Bird Island at this time of year. In the summer ... changes in the foraging ecology of fur seals at South Georgia nor by obvious changes in fishing practice ... Kingdom Title: Entanglement of Antarctic fur seals Arctocephalus gazella in man-made debris at Bird ... Abstract: Surveys of Antarctic fur seals entangled in man-made marine debris were carried out for ...
Meeting Document : SC-CAMLR-XII/BG/06 : Autor(es): Delegation of United Kingdom
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Status of white-chinned petrels Procellaria aequinoctialis Linnaeus 1758, at Bird Island, South Georgia
population status. We assessed the status of white-chinned petrels at Bird Island, South Georgia by comparing ... was consistent at around 44%. Significant factors determining densities of occupied burrows were crown ... Kingdom) Title: Status of white-chinned petrels Procellaria aequinoctialis Linnaeus 1758, at Bird Island ... breeding in tussock grassland at sub-Antarctic islands. Over the last decade it has been killed in large ...
Meeting Document : WG-FSA-01/26 Rev. 1 : Autor(es): S.D. Berrow, J.P. Croxall and S.D. Grant (United Kingdom)
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Assessments of by-catch in trawl fisheries at Heard and McDonald Islands
Paper Title: Assessments of by-catch in trawl fisheries at Heard and McDonald Islands Abstract ... (Statistical Division 58.5.2) to significantly affect, in the long term, spawning biomass of three taxa caught ... skates). The long-term annual yield for each of the three taxa was estimated using the generalised yield ... biomass estimates from surveys in the region from 1990 to 1993 and a limited amount of biological data ... ASSESSMENTS OF BY-CATCH IN TRAWL FISHERIES AT HEARD AND MCDONALD ISLANDS A.J. Constable, R. Williams and ... to those that maintain the by-catch at 'tolerable' levels relative to the catch of the target ... Measures 109/XV and 11O/XV provisions aimed at protecting by-catch species in the course of these ... at least five days.' Neither of the two approaches indicated above makes a direct appraisal of ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 231–243 : Autor(es): Constable, A.J., R. Williams and W.K. de la Mare