Resultados de la búsqueda
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Conservation of Antarctic pack-ice seals with increasing krill fishing and environmental change
impact on an already highly variable krill biomass, sea-ice loss of 66% has already occurred, and it ... Abstract: The management of Antarctic krill and conservation of its predators requires ... understanding about the compound effects of changing habitats, ecosystem interactions, and fishing practices ... . For Antarctic pack-ice seals, a main group of krill predators, we report the spatial density and krill ...
Meeting Document : WS-MPA-11/24 : Autor(es): J. Forcada, P.N. Trathan (UK), P.L. Boveng (USA), I.L. Boyd (UK), D.P. Costa (USA), M. Fedak (UK), T.L. Rogers and C.J. Southwell (Australia)
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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)
only 24% in the female population. The mean daily loss rate of toothfish observed at the hauling point ... sampling method; the known number of coils laid during a night's setting operations provided the ... sampling frame, and the sampling units consisted of lengths of line between marked connecting lines ... target of 60 fish/day. The method was further developed to integrate different, and varying, levels of ...
Meeting Document : WG-FSA-97/41 : Autor(es): Ashford, J.R., Everson, I.
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Diets of sympatrically breeding Adélie, gentoo and chinstrap penguins from Admiralty Bay, South Shetland Islands, Antarctica, 1981 to 2000
value of food brought to their chick per foraging trip. We discuss the energetic consequences of this ... Abstract: Given the importance and interdependence of diet studies to monitoring work, we ... compared data on the stomach contents and food load masses among three species of Pygoscelis penguins ... dependent on Antarctic krill (Euphausia superba), which accounted for over 93% of each species’ diet by ...
Meeting Document : WG-EMM-03/29 : Autor(es): W.Z. Trivelpiece (USA), K. Salwicka (Poland) and S.G. Trivelpiece (USA)
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Activity, seasonal site fidelity, and movements of Type-C killer whales between the Ross Sea, Antarctica and New Zealand
-annually returning to areas of ecological significance, including New Zealand waters north and east of East ... between the Ross Sea and New Zealand, but also emphasises the urgent need to re-evaluate the profile of ... , TCKW have been identified as one of the two top predator species in the Ross Sea most likely to be ... TCKW may use small-scale areas in this highly productive ecosystem intensely for a period of days to ...
Meeting Document : WG-EMM-15/52 : Autor(es): R. Eisert (New Zealand), G. Lauriano, S. Panigada (Italy), E.N. Ovsyanikova, I.N. Visser, P.H. Ensor, R.J.C. Currey, B.R. Sharp and M.H. Pinkerton (New Zealand)
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Preliminary investigations of an assessment model for skates and rays in the Ross Sea
actual numbers of skates released, the initial mortality of tagged skate, the tag loss rate, and the ... Antarctic skates in SSRUs 88.1H, 88.1I, 88.1J, & 88.1K of the Ross Sea. The developmental model ... attempted to create a catch history of all skates and rays in the Ross Sea, and integrate these data with ... assessment model. We conclude that aspects of the catch history were very uncertain, including the species ...
Meeting Document : WG-SAM-07/4 : Autor(es): A. Dunn, S.M. Hanchet, S.L. Ballara and M.P. Francis (New Zealand)
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SUMMARY OF SCIENTIFIC OBSERVATIONS RELATED TO CONSERVATION MEASURES 24-02 (2008), 25-02 (2009), 25-03 (2009) AND 26-01 (2009)
, being intentionally disposed of at sea (Table 1). There were reports of unintentional gear loss. 4 ... seabird conservation”, 25-02 (2009) “Minimisation of the Incidental Mortality of Seabirds in the Course of ... Longline Fishing or Longline Fishing Research in the Convention Area”, 25-03 (2009) “Minimisation of the ... Incidental Mortality of Seabirds and Marine Mammals in the Course of Trawling in the Convention Area”, 26-01 ...
Meeting Document : WG-FSA-10/08 : Autor(es): Secretariat
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Change in environmental conditions of the Southern Ocean observed by satellites and data-assimilating models between 1981 and 2019
Sea sector and on the Antarctic continental shelf; (5) gradual loss of sea-ice in the Amundsen Sea and ... Abstract: We provide a summary of environmental change in the Southern Ocean over the period of ... concentration from merged observation of SeaWiFS and MODIS-Aqua (1987–2019); (2) sea-surface temperature (SST ... ) from the AVHRR series of NOAA satellites (1981–2019); (3) spatial gradient of SST (as an indicator of ...
Meeting Document : WG-EMM-2019/39 : Autor(es): M. Pinkerton
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Line weights of constant mass (and sink rates) for Spanish-rig Patagonian toothfish longline vessels
method (a modified version of the former method to avoid fish loss by toothed whales) were examined in ... collections of rocks enclosed in netting bags. The netting bags abrade on the seabed, rocks are lost and ... use of torpedo-shaped steel weights. Steel weights are smaller, lighter for equivalent mass, more ... chartered Spanish-rig longline vessel to determine the statistical relationship in sink rates of longlines ...
Meeting Document : WG-FSA-07/15 : Autor(es): G. Robertson (Australia), C.A. Moreno, E. Gutiérrez (Chile), S.G. Candy (Australia), E.F. Melvin (USA) and J.P. Seco Pon (Argentina)
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Migrations of Antarctic fish Pseudochaenichthys georgianus Norman, 1939 in the Scotia Sea
distribution of krill, which flow further to North and East with geostrophic currents. Following after them ... Abstract: The material obtained between 1986 and 1991 has allowed to study the pattern of ... geographical and depth distribution of Pseudochaenichthys georgianus in the area of Scotia Arc Islands and on ... shelf of South Georgia Island. In the Antarctic colder waters in the Palmer Archipelago there were ...
Meeting Document : WG-FSA-12/68 Rev. 1 : Autor(es): R. Traczyk (Poland)
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Descriptive analysis of the Antarctic toothfish (Dissostichus mawsoni) tagging scheme in the Ross Sea for the years 1997/98 to 2003/04
the von Bertalanffy growth curve. The preliminary estimate of tag loss from double tagging experiments ... Abstract: A descriptive analysis of the toothfish tagging programme carried out in the Ross Sea ... Zealand vessels were unavailable at the time of the analysis. A total of 4903 Antarctic toothfish have ... two years, when tagging has been part of the Conservation Measure, New Zealand vessels have tagged ...
Meeting Document : WG-FSA-SAM-05/10 : Autor(es): A. Dunn, S.M. Hanchet and K. Maxwell (New Zealand)