Résultats de la recherche

1. Estimating the impact of depredation by killer whales and sperm whales on longline fishing for toothfish (Dissostichus eleginoides) around South Georgia

   . Most interactions from sperm whales occur during May at the start of the season with the sightings ... Abstract:  Observer data collected on longliners between 2003 and 2009 were analysed to look at ... the levels of depredation caused by killer whales (Orcinus orca) and sperm whales (Physeter ... macrocephalus) around South Georgia. Since 2003, cetaceans have been observed on 22% of 14 300 observed lines ...

   Meeting Document : WG-FSA-10/P06 : Auteur(s): J. Moir Clark and D.J. Agnew

2. COLLAPSE OF SOUTH AFRICA’S PENGUINS IN THE EARLY 21ST CENTURY

   11 000 pairs in 2009. At Dassen Island, the annual survival rate of adult penguins decreased from ... Abstract:  The number of African penguins Spheniscus demersus breeding in South Africa collapsed ... from about 56 000 pairs in 2001 to some 21 000 pairs in 2009, a loss of 35 000 pairs (>60%) in eight ... classification of the species as Endangered. In South Africa, penguins breed in two regions, the Western Capeand ...

   Meeting Document : WG-EMM-11/P8 : Auteur(s): R.J.M. Crawford, R. Altwegg, B.J. Barham, P.J. Barham, J.M. Durant, B.M. Dyer, D. Geldenhuys, A.B. Makhado, L. Pichegru, P.G. Ryan, L.G. Underhill, L. Upfold, J. Visagie, L.J. Waller and P.A. Whittington

3. Exploitation of the marine environment by two sypatric albatrosses in the Pacific Southern Ocean

   foraging trips to the Polar Front and Antarctic Zone at a distance of over 2000 km. They relied heavily on ... albatrosses D. chrysostoma breeding at Campbell Island, New Zealand, was studied using satellite telemetry ... . Data were analysed in relation to the bathymetry and sea-surface temperature of the foraging zones ... . Black-browed albatrosses spent 55% of their time on the Campbell Plateau but also carried out long ...

   Meeting Document : WG-FSA-04/59 : Auteur(s): S.M. Waugh (New Zealand), H. Weimerskirch, Y. Cherel (France), U. Shankar (New Zealand), P.A. Prince (United Kingdom) and P.M. Sagar (New Zealand)

4. Distribution, demography and discard mortality of crabs caught as by-catch in an experimental pot fishery for toothfish in the South Atlantic

   Abstract:  Between March 2000 and April 2001 two commercial fishing vessels undertook trials at ... South Georgia of a method of fishing for toothfish (Dissostichus eleginoides) using pots. A significant ... bycatch of lithodid crabs (three species of Paralomis spp.) was encountered. Paralomis spinosissima ... were also noted in depth distribution of the sexes and the size of crabs. Depth, soak time and area ...

   Meeting Document : WG-FSA-01/32 : Auteur(s): M.G. Purves (South Africa), D.J. Agnew, G. Moreno, C. Yau and G. Pilling (United Kingdom)

5. New possibilities of krill-dependent indicator species monitoring – UAV survey in Subarea 48.1

   software. In selected colonies a comparison with the results of measurements taken at the same time from ... study distribution and population size of three Pygoscelis penguin species on King George Island ... performed. The total flight time of the missions was 40 hours and 56 minutes. Flights covered the area of ... objective lens. Flights altitude at 350 – 550 m AGL (Above Ground Level) allowed images to be taken with a ...

   Meeting Document : WG-EMM-17/03 : Auteur(s): M. Korczak-Abshire, A. Zmarz, M. Rodzewicz, R. Storvold, M. Kycko, I. Karsznia, A. Kidawa and K.J. Chwedorzewska

6. Circumpolar connections between Antarctic krill (Euphausia superba Dana) populations: Investigating the roles of ocean and sea ice transport

   variability of influx to South Georgia, at times concentrating the influx into pulses of arrival. This ... critical food source and shelter, particularly in the early life stages. Advective modelling of transport ... pathways of krill have until now been on regional scales and have not taken explicit account of sea ice ... . Here we present Lagrangian modelling studies at the circumpolar scale that include interaction with sea ...

   Meeting Document : WG-EMM-07/P10 : Auteur(s): S.E. Thorpe, E.J. Murphy and J.L. Watkins (United Kingdom)

7. Length-age composition of the Patagonian toothfish, Dissostichus eleginoides, from the Kerguelen Island area

   annual catches were from 0.5 to 3.1 x 103 tonnes. Mean length of fish taken at 300- 500 m depth was 58.1 ... cm, mean age was 5.8 years. Mean length of fish taken at 540- 600 m depth was 85.8, mean age was 9.7 ... Abstract:  Results of length-age composition studies of the Patagonian toothfish, Dissostichus ... eleginoides, from various fishing grounds of the shelf and continental slope areas of the Kerguelen Islands ...

   Meeting Document : WG-FSA-92/08 : Auteur(s): V.G. Prutko and V.N. Chikov (Ukraine)

8. Peculiarities of Euphausia superba size composition in Statistical Subarea 48.2 (South Orkney Islands)

   Ridge have rather simple size composition (one or two size groups), but at the level or to the south of ... Bellingshausen Sea), which drift along opposite side of the South Antilles Ridge (near to South Orkney Island at ... suppose also seasonal patern of adolescent E.superba drift from Antarctic peninsula side. At last, the ... Abstract:  Clarification of main tendencies of spatial changeability of size composition of ...

   Meeting Document : WG-KRILL-91/11 : Auteur(s): V.I. Latogursky and R.R. Makarov (USSR)

9. Measurement of ocean temperatures using instruments carried by Antarctic fur seals

   . Congruence was found at horizontal spatial scales from 0.01° X 0.01° to 0.5° X 0.5° (degrees of latitude and ... longitude), and at a vertical scale of 10 m. However, there was no significant correlation between ... Abstract:  The study aimed to test the utility of instruments deployed on marine mammals for ... recorders (TDRs) fitted to lactating Antarctic fur seals foraging from the coast of South Georgia ...

   Meeting Document : WG-EMM-01/56 : Auteur(s): I.L. Boyd, E.J. Hawker, M.A. Brandon and I.J. Staniland (United Kingdom)

10. Possible options for the future management of the Antarctic krill fishery in Subarea 48.2

    . The proposed framework includes the use of CEMP sites, remote cameras at important land-based predator ... breeding colonies, at-sea observations of predators, oceanographic moorings with acoustic sensors, acoustic ... that might facilitate the development of new management procedures for the krill fishery in Area 48. In ... 2014, the state of ecological knowledge for Subarea 48.2 was reviewed, and it was suggested that the ...

    Meeting Document : WG-EMM-15/10 : Auteur(s): P.N. Trathan (United Kingdom), O.R. Godø (Norway) and S.L. Hill (United Kingdom)

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