Resultados de la búsqueda
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Acoustic estimates of krill abundance at South Georgia, 1981–1998
north-eastern and north-western ends of South Georgia. In four of these years biomass was higher to the ...
Meeting Document : WS-AREA 48-98/9 : Autor(es): A.S. Brierley, J.L. Watkins, C. Goss, M.T. Wilkinson and I. Everson (UK)
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Status of the Polish FIBEX acoustic data from the West Atlantic
/ Description: Acoustic data from the Polish FIBEX survey in the West Atlantic were analysed using recent ... densities of krill in the oceanic parts of the Drake Passage were low (3 g m-2); however, the results also ... in the Bransfield Strait. These results are discussed in the context of spatial and seasonal ... , Madingley Road Cambridge CB3 OET, United Kingdom Abstract Acoustic data from the Polish FIBEX survey in ... , 1991a). This analysis indicated that the acoustic densities of hi l l in the oceanic parts of the ... density. High acoustic densities of krill(77 g m-') were also present in the Bransfield Strait. These ... results are discussed in the context of spatial and seasonal variation which has previously been reported ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 125–132 : Autor(es): Trathan, P.N., J. Kalinowski and I. Everson
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Testing early life connectivity using otolith chemistry and particle-tracking simulations
compared the chemistry with simulated particle transport using a circulation model. Material laid down in ... eastern and northern shelves, indicating a single, self-recruiting population. Consistent with the otolith ... nests, are transported in the southern ACC, missing South Georgia but following trajectories along the ... stages in the water column substantially influence the direction and extent of connectivity. Used in ...
Meeting Document : WG-FSA-10/P02 : Autor(es): J. Ashford, M. La Mesa, B.A. Fach, C. Jones and I. Everson
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Population and survival trends of wandering albatrosses (Diomedea exulans) breeding on Macquarie Island
fishing effort in the eastern Indian Ocean. Breeding numbers slowly increased on Macquarie Island through ... than 20 breeding pairs. Most breeding birds in this small population are banded and monitoring over the ... effort and survival varied markedly with breeding numbers declining from a peak in 1964 to near ... extinction levels in the mid 1980’s. Underlying this decline was a significant decrease in juvenile survival ...
Meeting Document : WG-FSA-04/50 : Autor(es): A. Terauds, R. Gales, R. Alderman and G.B. Baker (Australia)
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Populations of surface-nesting seabirds at Marion Island, 1994/95 to 2002/03
gentoo penguins Pygoscelis papua, eastern rockhopper penguins Eudyptes chrysocome filholi, Crozet shags ... attributed to an altered availability of food. Decreases in numbers of dark-mantled sooty albatrosses ... and possibly northern giant petrels M. halli may have resulted from mortality of birds in longline ... in numbers of king penguin chicks surviving to the end of winter. Author(s): R.J.M. Crawford, J ...
Meeting Document : WG-EMM-03/8 : Autor(es): R.J.M. Crawford, J. Cooper, B.M. Dyer, M.D. Greyling, N.T.W. Klages, P.G. Ryan, S.L. Petersen, L.G. Underhill, L. Upfold, W. Wilkinson, M.S. de Villiers, S. du Plessis, M. du Toit, T.M. Leshoro, A.B. Makhado, M.S. Mason, D. Merkle, D. Tshingana, V.L. Ward and P.A. Whittington (South Africa)
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Dominios de planificación de AMP
location of current and planned research efforts in order to be helpful as reporting and auditing units ... 6: Kerguelen Plateau Domain 7: Eastern Antarctica Domain 8: Ross Sea Domain 9: Amundsen ... be accessed via the Online GIS. There has been extensive discussion of MPAs in the Scientific ... Committee and the Commission in recent years. These discussions are very difficult to summarise, however ...
Page : Site Section: Science
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Mincing, mealing and batching: waste management strategies aimed at reducing seabird interactions with trawl vessels
trip compared three treatments (1) mincing all waste (2) discharging unprocessed waste and (3) mealing ... treatment (4) where waste was held and discharged in batches. The response to the experimental treatments ... seabirds. In contrast, mealing all waste had a marked effect on several of the bird groups. In particular ... observations on the second trial, the minced treatment suggested a reduction in the numbers of all albatross ...
Meeting Document : WG-FSA-07/42 : Autor(es): E. Abraham and J. Pierre (New Zealand)
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Informe sobre la operación del B/P nasero Viking Sky durante Setiembre–Octubre del 2001: Atlántico sudoccidental (latitudes 37°–38° sur y 42° sur) Área estadística 41
Devincenzi in 1924, and it is usually found by fishing trawlers between 900 m and 1200 m of depth, along the ... ” performed this fishing trip between the 2 of september to the 11 of october of 2001, with a Scientific ... Observer from DINARA on board. The ship looked for fishing zones both in uruguayan and international waters ... 86.00 cm The majority of the sampled individuals of both sexes were determined in the grade 2 of gonadic ...
Meeting Document : WG-FSA-02/66 : Autor(es): O.D. Pin y H. Nión (Uruguay)
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Extinction risk of Antarctic and sub-Antarctic colonies of Pygoscelid penguins under climate change context
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 ... intraspecific competition appears as the most important endogenous factor in all colonies. In turn, the response ... reduction of carrying capacity is mediated by a decrease in food availability and appears as key factor for ...
Meeting Document : WG-EMM-2019/74 : Autor(es): M. Huerta and S.A. Estay
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A preliminary investigation of the possible effects of rhizocephalan parasitism on the management of the crab fishery around South Georgia
levels of infection by a rhizocephalan barnacle have been found in the population of the crab Paralomis ... to declines in spawning stock. The effects of harvesting both healthy and infected animals are ... animals from the population. The need is stronger when the population is sensitive to declines in spawning ... stock. Results highlight the importance of incorporating parasitism in the design of a management ... INTRODUCTION The first fishing trip targeting crabs in Subarea 48.3, by the FV Pro Surveyor, presented in ... where the externa have been lost (Sloan, 1984). This suggests that, at least in some cases, the ... Relatively high levels of infection by a rhizocephalan barnacle have been found in the population of the ... : (i) resilience; and (ii) sensitivity to declines in spawning stock. The effects of harvesting both ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 175–192 : Autor(es): Basson, M