Resultados de la búsqueda

1. 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)

2. 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)

3. 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

4. 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)

5. 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)

6. 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

7. 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

8. Using acoustic echo counting to estimate grenadier abundance in the Ross Sea (SSRU88.1I)

   Abstract:  Grenadiers (Macrourus spp.) are the main bycatch species in the exploratory longline ... fishery for toothfish in the Ross Sea. Previous studies concluded that acoustics methods could be used to ... targets was similar to that predicted based on the expected size range of grenadiers. Variability in ... spatial coverage between years meant that it was not possible to obtain a consistent time-series of ...

   Meeting Document : WG-FSA-14/62 : Autor(es): Y. Ladroit, R.L. O’Driscoll and S. Mormede (New Zealand)

9. Spatial and temporal variability in foraging patterns of krill predators at Signy Island and South Georgia

   . In a system where the distribution and abundance of prey is highly variable, foraging behaviour must ... be highly adaptable. In this paper we consider the behaviour of seal and seabird krill-dependent ... ; we also look to see whether differences are apparent between years. We use this information about ... described as an example of how they could be used in other locations where the fishery operates. Author(s ...

   Meeting Document : WG-EMM-02/33 Text : Autor(es): P.N. Trathan, J.L. Tanton, A.S. Lynnes, M.J. Jessopp, H. Peat, K. Reid and J.P. Croxall (United Kingdom)

10. The spawning dynamics of Patagonian toothfish in the Australian EEZ at Heard Island and the McDonald Islands and their importance to spawning activity across the Kerguelen Plateau

    Abstract:  In 2011, AAD, the Fisheries Research and Development Corporation and Australian fishing ... collected in 2011. This data confirms that toothfish spawn between July and August across a large ...   ‘mature’, offset by two years to account for the duration of the maturation process, provided more ... Patagonian toothfish in the Australian EEZ at Heard Island and the McDonald Islands and their importance to ...

    Meeting Document : WG-FSA-12/P08 : Autor(es): D.C. Welsford, J. McIvor, S.G. Candy and G.B. Nowara

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