Resultados de la búsqueda
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Exploitation of mesoscale oceanographic features by grey-headed albatross Thalassarche chrysostoma in the southern Indian Ocean
association with mesoscale oceanographic features, as identified by sea surface height anomalies, in the ... anomalies created by the Agulhas Return Current in the Subtropical Convergence and the Subantarctic zones ... . In contrast, during chick-rearing all tracked birds foraged to the southwest of the island, at the ... edges of anomalies along the South-West Indian Ridge. Previous work in this area has shown that these ...
Meeting Document : WG-FSA-01/12 : Autor(es): D.C. Nel, J.R.E. Lutjeharms, E.A. Pakhomov, I.J. Ansorge, P.G. Ryan and N.T.W. Klages (South Africa)
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Supplement to the krill synoptic survey design in Area 48 (with participation of a Russian scientific research vessel)
integral part of Area 48 is discussed. It is shown that in this case there shall be obtained for the first ... ° W. It is emphasized that in this way there shall be obtained the data that are important both to ... acquire knowledge in appropriateness of krill horizontal distribution over the whole Area 48, and to ... -date survey design, taking into account the operation by Russian R/V ATLANTIDA in Subarea 48.4, as ...
Meeting Document : WG-EMM-99/43 : Autor(es): V.A. Sushin, S.M. Kasatkina and F.F. Litvinov (Russia)
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The influence of environmental variables and mitigation measures on seabird catch rates in the Japanese tuna longline fishery within the Australian Fishing Zone, 1991–1995
environmental variables and mitigation measures upon catch rates of seabirds in the Japanese pelagic longline ... fishery. In the Australian Fishing Zone (AFZ) seabirds were most likely to be caught on longlines that ... were set during summer, in southern areas of the zone, and during daylight hours. However ... , interpretation of changes in catch rates resulting from the use of mitigation measures or from weather effects ...
Meeting Document : WG-FSA-98/32 : Autor(es): N. Brothers, R. Gales and T. Reid (Australia)
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Preliminary review of Antarctic toothfish maturity in the Ross Sea
toothfish Dissostichus mawsoni caught by Russian longliners in the Ross Ross Sea of the Pacific sector in ... was established that in the period of fishing, females and males with gonads at maturity stage III ... in the Ross Sea the termination of gonad maturity of toothfish takes place from March to April, and ... condition, and diameter of their large oocytes was 1075- 2331•10-6m in different years. Author(s): S.V ...
Meeting Document : WG-FSA-11/27 : Autor(es): S.V. Piyanova and A.F. Petrov (Russia)
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MULTIPLE INDICATORS SUGGEST A STRONG ECOSYSTEM ANOMALY AT SOUTH GEORGIA IN 2009
local oceanographic and atmospheric conditions. Much of the observed variability in various fitness ... revealed a strong anomaly in early 2009. Above average sea temperatures, without any evidence of increased ... warm water inflow were followed by reduced icefish catches, a paucity of krill in icefish and penguin ... diets and low krill biomass in the regularly surveyed “Western Core Box”. Consequently many of the ...
Meeting Document : WG-EMM-09/23 : Autor(es): S. Hill, M. Belchier, M. Collins, S. Fielding, E. Murphy, P. Trathan, H. Venables and C. Waluda (United Kingdom)
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QUANTIFYING MOVEMENT BEHAVIOUR OF VESSELS IN THE ANTARCTIC KRILL FISHERY
behaviour of the krill fishery. Analysis of distance between hauls in relation to their catch level revealed ... longer distances moved between hauls in Area 48.1 compared to 48.2 and 48.3 reflecting the large number ... model suggested in late 1980s are proposed based on the results from this study. These analyses ... demonstrate the need for high quality year-round data on all vessels participating in the krill fishery to ...
Meeting Document : WG-EMM-09/P05 : Autor(es): S. Kawaguchi and S.G. Candy
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ANTARCTIC TOOTHFISH STOCK ASSESSMENT IN DIVISION 58.4.1 ON THE BASIS OF CPUE DATA
Abstract: An attempt to use CPUE data based on data of erussian observers in the assessment of ... Antarctic toothfish stock in division 58.4.1 is made. Unlike some previous results obtained for this ... biomass in the Ross Sea. As a result of implementation of a dynamic production model, current biomass in ... : ANTARCTIC TOOTHFISH STOCK ASSESSMENT IN DIVISION 58.4.1 ON THE BASIS OF CPUE DATA Approval: Approved ...
Meeting Document : WG-SAM-09/12 : Autor(es): D. Vasilyev, K. Shust, V. Tatarnikov, I. Istomin and A. Petrov (Russia)
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Seabird mortality in the longline fishery for Patagonian toothfish at the Prince Edward Islands: 1996–1997
Prince Edward Islands in October 1996, but unsanctioned fishing commenced some months before this date ... the estimated 3.8 million hooks set by permit-holders in the South African Exclusive Economic Zone ... hooks were found in birds or in bird pellets on Marion Island during 1996-97. Almost all birds killed ... were breeding adults, and there was a significant bias towards males in at least three species. More ...
Meeting Document : WG-FSA-97/51 : Autor(es): Boix-Hinzen, C., Enticott, J.W., Ryan, P.G., Wanless, R., Purves, M., Nel, D.C.
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Echo integration in low signal to noise regimes: methods of noise estimation and removal
Abstract: The results of acoustic surveys, especially in low signal-to-noise regimes, are ... contribution to the above-threshold-signal cannot later be removed in post processing. The only solution is to ... log unthresholded data and to correct for noise in post processing. Integrated data collected at 120 ... requires that logged data have high resolution in both depth and distance. It can be applied so long as ...
Meeting Document : WG-EMM-97/74 : Autor(es): Higginbottom, I., Pauly, T.
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An outline of the Antarctic research cruise by the Japanese RV Kaiyo Maru around the South Shetland Islands in 1994/95
Agency was conducted in the southwest of the Scotia Sea, especially in the vicinity of the South Shetland ... oceanographic and ecological survey in relation to the distribution and abundance of the Antarctic krill ... analytical studies are currently in progress. Author(s): Takao, T., Ogishima, T., Naganobu, M., Ichii, T ... South Shetland Islands in 1994/95 Approval: Approved ...
Meeting Document : WG-EMM-95/50 : Autor(es): Takao, T., Ogishima, T., Naganobu, M., Ichii, T., Kawaguchi, S.