Resultados de la búsqueda
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Review of CCAMLR activities on monitoring marine debris in the Convention Area
on marine mammals and seabirds in the Convention Area has been reviewed. The CCAMLR Marine Debris ... consecutive years, these are: Cape Shirreff, (Livingston Island, South Shetland Islands); Bird Island, (South ... debris, principally packaging items, fishing gear, and wood items, reached a peak in the period 1994-1996 ... at Bird Island and Signy Island, but have declined. The number of debris items found had increased in ...
Meeting Document : SC-CAMLR-XXV/BG/09 : Autor(es): Secretariat
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Seabird mortality in the Japanese tuna longline fishery around Australia, 1988–1995
) by Japanese longline vessels targeting tuna. In recent years the estimated rate of seabird bycatch in ... the AFZ has been in the order of 0.15 birds 1000 hooks, translating to mortalities of 1000-3500 birds ... fishing effort occurs in winter; (b) when longlines are set during the day; (c) in the waters around ... southern Australia. Uncertainties in the observed catch rates prevent confident assessment of trends, but ...
Meeting Document : WG-FSA-98/31 : Autor(es): N. Brothers, R. Gales and T. Reid (Australia)
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Adélie penguin foraging behaviour and breeding success in seasons of contrasting krill availability (Mawson Coast, Antarctica)
to the diet in 2003 but was only a minor component in 2001. Differences between years were ... present during the two-week survey period in 2001 than in 2003. Penguin parameters that showed significant ... mass and dietary composition. Penguins travelled further to forage in 2003 than 2001, stayed away ... rate, analogous to the functional response referred to in predator-prey theory. This showed the ...
Meeting Document : WG-EMM-03/44 : Autor(es): J. Clarke, M. Tierney, S. Candy, S. Nicol, L. Irvine and K. Kerry (Australia)
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Intra-annual variability in the abundance of Antarctic krill (Euphausia superba) at South Georgia, 2002–2005: within-year variation provides a new framework for interpreting previous ‘annual’ krill density estimates
pattern in krill abundance was detected that recurred consistently over all 3 years. Krill densities in ... winter were predominantly low (mean = 18.7 g m-2 SD 24.3) but rose substantially by summer in each year ... . within-year) could have led to the perceived between-year variation from previous summer surveys in the ... statistically different (P>0.05) from estimates derived from standard ship-based krill surveys in adjacent ...
Meeting Document : WG-EMM-06/25 : Autor(es): R.A. Saunders, J.L. Watkins, K. Reid, E.J. Murphy, P. Enderlein, D.G. Bone and A.S. Brierley (United Kingdom)
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Possible options for the future management of the Antarctic krill fishery in Subarea 48.2
experiment should be evaluated after 5 years in order to explore initial results and to determine if the ... that might facilitate the development of new management procedures for the krill fishery in Area 48. In ... ecological information. In 2014 we therefore suggested that there was an urgent need to improve the ... ecological knowledge base, but that this would take time, especially in the context of climate change. Here ...
Meeting Document : WG-EMM-15/10 : Autor(es): P.N. Trathan (United Kingdom), O.R. Godø (Norway) and S.L. Hill (United Kingdom)
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Spatial and temporal distribution patterns of acoustic backscatter in the New Zealand sector of the Southern Ocean
identify spatial (vertical and horizontal) and temporal (annual, seasonal and diel) patterns in 28 acoustic ... transects collected between 2008 and 2014. Mean acoustic backscatter (s a) at 38 kHz varied between years ... , but overall was reasonably stable, being in the same order of magnitude across all transects ... could be related to MTLO abundance, trawl samples collected in 3 research voyages suggest that it may ...
Meeting Document : WG-EMM-18/P06 : Autor(es): P.C. Escobar-Flores, R.L. O’Driscoll and J.C. Montgomery
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The winter distribution of Adélie and chinstrap penguins from two breeding colonies in the South Shetland Islands of Antarctica
penguins from a breeding site in Admiralty Bay, King George Island (62° 10’ S, 58° 30’ W) were instrumented ... five chinstrap and six Adélie penguins from two breeding colonies in the South Shetland Islands ... with satellite tags in early March 2000, following their annual molt; similarly, two birds were tagged ... in late February at their breeding site on Cape Shirreff, Livingston Island (62° 28’ S, 60° 46’ W ...
Meeting Document : WG-EMM-02/55 : Autor(es): S.G. Trivelpiece and W.Z. Trivelpiece (USA)
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Variations in the diet composition and feeding intensity of mackerel icefish (Champsocephalus gunnari) at South Georgia (Antarctic)
energy content appears to be the prefered diet. In years of krill shortage, such as in 1991, krill is ... the lowest within a 28 year period of investigation. Variation in food composition between sampling ... ) around Shag Rocks and the mainland of South Georgia was analyzed from c. 8,700 stomachs collected in ... superba), the hyperiid Themisto gaudichaudii, mysids (primarily Antarctomysis maxima) and in 1985 also ...
Meeting Document : WG-FSA-93/24 : Autor(es): K.-H. Kock and S. Wilhelms (Germany), I. Everson (United Kingdom) and J. Gröger (Germany)
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Review of CCAMLR activities on monitoring marine debris in the Convention Area
on marine mammals and seabirds in the Convention Area has been reviewed. The CCAMLR Marine Debris ... than 3 consecutive years, these are: Cape Shirreff, (Livingston Island, South Shetland Islands); Bird ... Islands). Marine debris, principally packaging items, fishing gear, and wood items, reached a peak in the ... debris found in grey-headed albatross and wandering albatross colonies at Bird Island in 2004 has ...
Meeting Document : SC-CAMLR-XXIII/BG/11 : Autor(es): Secretariat
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Towards an assessment of the stock of the ommastrephid squid Martialia hyadesi in the Scotia Sea: data from predators
exploitation of the sub-Antarctic ommastrephid species Martialia hyadesi will be attempted in the future. This ... seal and is probably taken in significant quantities by several other Southern Ocean vertebrate ... predators. Estimated annual consumption by known predators in the Scotia Sea is 326098- 330642 tonnes, 94 ... . Martialia probably has a life span of two years and a circumpolar distribution but its biology and ecology ...
Meeting Document : SC-CAMLR-IX/BG/13 : Autor(es): Delegation of United Kingdom