Resultados de la búsqueda
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First global census of the Adélie penguin
% larger (3.79 million breeding pairs) than the last estimate in 1993. We provide the first abundance ... colonizations. These recent colonizations represent approximately 5% of the increase in known breeding ... territories. Additionally, we report on thirteen colonies not found in the survey, including eight we conclude ... changes in abundance and distribution, and finds that Adélie Penguin declines on the Antarctic Peninsula ...
Meeting Document : WG-EMM-14/P05 : Autor(es): H.J. Lynch and M.A. LaRue
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Using tag-recapture data to estimate catchability of a series of random stratified trawl surveys
Heard Island and McDonald Islands (HIMI) in Division 58.5.2, a prior for catchability q of the random ... address potential bias in the estimation of q and conclude that the potential bias that may arise from ... fishing selectivity cannot be corrected for given the available data. In the absence of an unbiased ... used for abundance estimates from trawl surveys in a toothfish stock assessment. The bounds of such as ...
Meeting Document : WG-SAM-15/34 : Autor(es): W. de la Mare, P. Ziegler and D. Welsford (Australia)
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Reporting procedures for the continuous fishing method
imprecise and with some systematic errors in positioning the catch. In previous EMM meeting we proposed ... the quality of catch data. In this paper, we report a new evaluation of the reporting method. We find ... at the cost of a high uncertainty in the individual 2-hour catches. We still consider a 6-hours ... alternative approaches using instrumented observation of krill density in the mouth opening of the trawl as a ...
Meeting Document : WG-EMM-17/48 : Autor(es): O.R. Godø and T. Knutsen
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Identification and speciation of Antarctic skates
(COI) were sequenced in 9 species of Bathyraja skates from the Southern Oceans and New Zealand. Based ... Ross Sea and South Atlantic. However, for Bathyraja n. sp. cf. eatonii and Bathyraja maccaini in the ... species in the North Pacific Ocean. Despite investigating four colour characters, eight meristic ... dorsal colouration was unreliable. Proportional disc width showed substantial changes in shape between ...
Meeting Document : WG-FSA-07/27 : Autor(es): P.J. Smith, C.D. Roberts, A.L. Stewart, M. McVeagh and C.D. Struthers (New Zealand)
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Beach debris survey – Main Bay, Bird Island, South Georgia, 2004/05
stable with 4.1135kg collected this year, whilst 5.3957 kg was gathered in 2003/04. For the second ... pieces in 1995/96. Over the same 15-year period packing bands are still regularly recovered from the ... 43% on the 361 items recorded in 2003/04 that corresponded to the highest levels of summer beach ... than the previous recording period with only 23% of the total number of debris items being collected in ...
Meeting Document : SC-CAMLR-XXV/BG/12 : Autor(es): Delegation of the United Kingdom
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Beach debris survey, Signy Island, South Orkney Islands, 2003/04
recovered (a decrease of 61% and 57.56% since 2002/03 respectively). There was a decrease in the number of ... reversing the rise in packaging bands experienced over the previous two seasons and marking a return to what ... has otherwise proved a declining trend since 1993/94. Despite this seasons decrease in these packaging ... fishing vessels brought into force by CCAMLR in 1995/96 has yet to prove entirely effective and should ...
Meeting Document : SC-CAMLR-XXIII/BG/15 : Autor(es): Delegation of the United Kingdom
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Is population structure of Patagonian toothfish (Dissostichus eleginoides) determined by the Antarctic Circumpolar Current?
Abstract: Water transported by the Antarctic Circumpolar Current (ACC) in the Southern Ocean may ... island groups with little energetic cost, and may constrain movement in other directions, influencing ... of the ACC, and off Kerguelen and South Georgia Islands, situated respectively in the southern Indian ... a likelihood method. Toothfish showed significant differences in VB parameters between the Falkland ...
Meeting Document : WG-FSA-03/84 : Autor(es): J.R. Ashford, C.M. Jones, E. Hofmann (USA), I. Everson (United Kingdom) and G. Duhamel (France)
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Beach debris survey Signy Island, South Orkney Islands, 1998/99
recovered was more than double the mass of items in 1997/98. Classifying the material by source revealed ... that 40% had come from ships or fishing vessels in the form of packaging bands, fishing net and foam ... on the use of packaging bands aboard fishing vessels brought into force by CCAMLR in 1995/96, the ... from beaches at Signy may be partly to do with their longevity in the marine environment. The increase ...
Meeting Document : CCAMLR-XVIII/BG/7 : Autor(es): Delegation of the United Kingdom
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PRELIMINARY PROPOSAL FOR MARINE SPATIAL PROTECTION AROUND THE SOUTH ORKNEY ISLANDS
areas of conservation importance and the selection of candidate sites for protection. In addition, the ... (covering the region marked in Figure 3) contributing towards the conservation of marine biodiversity in ... ) would apply; ii) Recommend to the Commission that further intersessional work be undertaken in relation ... to the additional areas of conservation importance identified in this paper, with a view to ...
Meeting Document : SC-CAMLR-XXVIII/14 : Autor(es): Delegation of the United Kingdom
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An assessment of longlining operations for Dissostichus eleginoides on board the Chilean-registered longliner BF Cisne Verde during March–May 1997 around South Georgia (Subarea 48.3)
maturity was also larger. The proportion of mature fish in the male population sampled was 52.0%, but was ... only 24% in the female population. The mean daily loss rate of toothfish observed at the hauling point ... CPUE by numbers between catches in 1994 and 1997 despite reduction in CPUE by weight indicated that ... exclusion effects may be important in determining the catch taken by longlines. Continuing decreases in size ...
Meeting Document : WG-FSA-97/41 : Autor(es): Ashford, J.R., Everson, I.