Resultados de la búsqueda

1. Aggregation patterns of pelagic predators and their principal prey, Antarctic krill, near South Georgia

   is an explicit consideration of the separation in space between swarms of krill and aggregations of ... differences in foraging strategies. Published in Journal of Animal Ecology (1993) 62, 000-000 Author(s):  R.R ...

   Meeting Document : WG-CEMP-93/13 : Autor(es): R.R. Veit (USA), E.D. Silverman (USA) and I. Everson (United Kingdom)

2. DEVELOPMENT OF EFFECTIVE MITIGATION TO REDUCE SEABIRD MORTALITY IN THE ICEFISH (CHAMPSOCEPHALUS GUNNARI) TRAWL FISHERY IN SUBAREA 48.3

    mitigate such mortality. As an interim measures a vessel specific 20‐bird mortality threshold was ...  Subarea 48.3 became a concern in the late 1990s. At this time there was little knowledge on how to ...  introduced for Subarea 48.3 in 2001. This provided a strong commercial incentive for industry to develop ...  and simply applied mitigation measure and is thought to be largely responsible for the continued ...

   Meeting Document : WG-IMAF-09/15 : Autor(es): B. Sullivan (BirdLife International), J. Clark (United Kingdom), K. Reid (Secretariat) and E. Reid (BirdLife International)

3. Further computations of the consequences of setting the annual krill catch limit to a fixed fraction of the estimate of krill biomass from a survey

   a function of the fraction of the biomass estimate which is set as the catch for a 20-year period ... preferable to a summer harvest. However, the imposition of an upper-bound of 1.5 yr-1 on the effective annual ... the Third and Fourth Meetings of Working Group on Krill. The most important of these extensions is ... integration over the ranges of uncertainty for a number of the model parameters. Results are provided for the ...

   Meeting Document : WG-KRILL-93/42 : Autor(es): D.S. Butterworth, G.R. Gluckman, R.B. Thomson and S. Chalis (South Africa)

4. A re-analysis of the Kerguelen Shelf and Skiff Bank stocks of Champsocephalus gunnari

   -frequency data for the years 1981 to 1990. Cohort analysis yielded a Stock Biomass of 22 711 tonnes in 1988 ... for the Age 2 Kerguelen Shelf stock, an order of magnitude lower than that calculated from a biomass ... re-calculated from those used by the Working Group on Fish Stock Assessment in 1989 using length ...

   Meeting Document : WG-FSA-90/17 : Autor(es): G. Duhamel (France) and D.J. Agnew (Secretariat)

5. Foraging energetics of Antarctic fur seals in relation to changes in prey availability

   lactating female Antarctic fur seals, Arctocephalus gazella, foraging at sea was measured in two years using ... account for the observed between-year difference in at-sea FMR of C. ursinus while foraging-trip duration ... doubly labeled water at South Georgia Island. There was no difference between years in mass gain, water ... influx, mass-specific field metabolic rate (FMR), or absolute FMR. Mean at-sea FMR over both years was ...

   Meeting Document : SC-CAMLR-VIII/BG/13 : Autor(es): Delegation of United Kingdom

6. Quantifying habitat use in satellite-tracked pelagic seabirds: application of kernel estimation to albatross locations

   are very distinct. Based on location density categories accounting for 50% of locations, the foraging ... -rearing period of the breeding cycle at South Georgia. At this time the activity range of these two ... species covers an estimated 440 000 and 640 000 km 2, respectively, with very substantial overlap. In ... contrast, kernel estimation reveals that the main foraging areas of these two sympatric, congeneric species ...

   Meeting Document : WG-EMM-01/67 : Autor(es): A.G. Wood (United Kingdom), B. Naef-Daenzer (Switzerland), P.A. Prince and J.P. Croxall (United Kingdom)

7. Movement and growth of tagged toothfish around South Georgia and Shag Rocks (Subarea 48.3)

   and 2001, and have been at liberty from one to two years. Four fish were tagged and recaptured from ... been recovered at 42°S after about one year at liberty from some opportunistic tagging carried out on a ... Oxytetracycline which places a marker on the otolith indicating the date of injection and release. To date, 50 ... the same longline vessel in 2002 after up to two months at liberty. The fish tagged during the ...

   Meeting Document : WG-FSA-02/28 : Autor(es): T.R. Marlow, D.J. Agnew and I. Everson (United Kingdom)

8. Decrease in numbers of the eastern rockhopper penguins Eudyptes chrysocome filholi at Marion Island, 1994/95 to 2002/03

   fledged on average 0.40 chicks per annum, an amount thought insufficient to balance mortality of breeding ... . These factors suggest an inadequate supply of food for rockhopper penguins at Marion Island. Decreases ... . Except in 1997/98, the mass of chicks at fledging was less than that recorded at two other localities ... . Rockhopper penguins at Marion Island continued to feed mainly on crustaceans during chick rearing. There was ...

   Meeting Document : WG-EMM-03/10 : Autor(es): R.J.M. Crawford, J. Cooper, B.M. Dyer, M.D. Greyling, N.T.W. Klages, D.C. Nel, J.L. Nel, S.L. Petersen and A.C. Wolfaardt (South Africa)

9. CCAMLR conservation measures: review of the numbering system

   information on the topics addressed by the measures, maintains a notation familiar to CCAMLR, and allows for ... since 1984. However, the use of consecutive numbers does not provide information on topics covered by ... the measures, nor does it provide an implicit reference to the history of the measures. An improved ... an easy transition from the existing system to the new system. The new system would use unique 4 ...

   Meeting Document : CCAMLR-XXI/15 : Autor(es): Secretariat

10. A characterisation of the toothfish fishery in Subareas 88.1 and 88.2 from 1997/98 to 2003/04

    Abstract:  An exploratory fishery for Antarctic toothfish (D. mawsoni) has been in operation for ... seven seasons in Subarea 88.1 and for three seasons in Subarea 88.2. A large amount of data on toothfish ... changes in the ice conditions and fleet composition, no two seasons have been the same. In 2001, 2003, and ... seasons, there has been a trend towards fishing in deeper water and this is reflected in an increase in ...

    Meeting Document : WG-FSA-04/20 : Autor(es): S.M. Hanchet, M.L. Stevenson, N.L. Phillips and P.L. Horn (New Zealand)

Páginas