Résultats de la recherche

1. Counts of surface-nesting seabirds at Marion Island in 2003/04

   , eastern rockhopper penguins E. chrysocome filholi and Crozet shags Phalacrocorax [atriceps] melanogenis ... continued to decrease at Marion Island in 2003/04. The decreases are thought to be due to a reduced ... appear stable at the island, but often with large fluctuations in numbers breeding. Numbers of dark ... have shown a long-term decrease, although the count for dark-mantled sooty albatrosses was higher in ...

   Meeting Document : WG-EMM-04/29 : Auteur(s): R.J.M Crawford, N. de Bruyn, B.M. Dyer, B. Hanise, N.T.W. Klages, P.G. Ryan, L.G. Underhill and L. Upfold (South Africa)

2. Foraging response of Antarctic fur seals to changes in the marine environment

   fish and squid in the diet. Foraging trip duration, ashore duration and dive frequency increased ... 1964 d at sea. The frequencies of krill, fish and squid in the diet were estimated from prey items ... contained in scats. In 1996, a year of high krill abundance, females made shorter foraging trips, fewer ... dives and spent more time ashore than in 1994 when krill was scarce. Females fed exclusively on krill in ...

   Meeting Document : WG-EMM-99/35 : Auteur(s): D.J. McCafferty, I.L. Boyd, T.R. Walker and R.I. Taylor (United Kingdom)

3. TARGET STRENGTH STUDIES ON ANTARCTIC SILVERFISH (PLEURAGRAMMA ANTARCTICUM) IN THE ROSS SEA

   ) theoretical, 2) ex situ measures on dead or living fish under experimental conditions, 3) in situ measures on ... free swimming fish in their natural habitat. A canvassing of the literature suggested that the type of ... be several dB higher than in situ (Nakken and Olsen, 1977). On other hand the many factors likely to ... influence TS measurements in situ (swimming movements and aspect, day-night behaviour, physiological state ...

   Meeting Document : SG-ASAM-09/10 : Auteur(s): M. Azzali, I. Leonori, I. Biagiotti, A. De Felice, M. Angiolillo, M. Bottaro and M. Vacchi (Italy)

4. Milk consumption and growth efficiency in Antarctic fur seal (Arctocephalus gazella) pups

   consumption was determined on 388 occasions in 177 pups. Mean estimates of milk consumption ranged from 2.5 to ... 2-day maternal attendance periods (feeding bouts). There were no differences in milk consumption ... between the sexes in any year. Both per-bout and per-day milk consumption increased steadily with age ... before decreasing significantly in the last 30-40 days of lactation. Per-bout milk consumption was ...

   Meeting Document : WG-EMM-97/11 : Auteur(s): Socha, D.G., Arnould, J.P.Y., Boyd, I.L.

5. Comparisons in prey distribution between inshore and offshore foraging areas of chinstrap penguins and Antarctic fur seals at Seal Island

   foraging trip such as Antarctic fur seals (Arctocephalus gazella) and overnight foraging chinstrap penguins ... (Pygoscelis antarctica) went beyond the inshore region and foraged in the slope/offshore region, even though ... the inshore region. Only diurnal chinstrap penguins foraged in the inshore region. The following ... advantages are considered for visual predators to feed in the slope/offshore region at night:(l) krill showed ...

   Meeting Document : WG-EMM-96/49 : Auteur(s): Ichii, T., Bengtson, J.L., Boveng, P., Cameron, M.F., Naganobu, M., Meyer, W.R., Hiruki, L.M., Takao, T., Jansen, J.K., Kawaguchi, S.

6. Atlas of top predators from French Southern Territories in the Southern Indian Ocean

   . Indeed, seabirds and seals are considered as good indicators of changes in ecosystems at differential ... Atlas of top predators from the French Southern Territories in the Southern Indian Ocean is a summary of ... penguin, Adelie penguin, eastern rockhopper penguin, northern rockhopper penguin, macaroni penguin ... identifying important areas in the southern Indian Ocean. The determination of zones of high species richness ...

   Meeting Document : WG-EMM-16/42 : Auteur(s): K. Delord, C. Barbraud, C.-A. Bost, Y. Cherel,C. Guinet and H. Weimerskirch

7. DISTRIBUTION AND BIOLOGY ON ANTARCTIC KING CRAB PARALOMIS FORMOSA CAUGHT AS BYCATCH IN FISHERY FOR TOOTHFISH (DISSOSTICHUS ELEGINOIDES) ON PATAGONIAN CONTINENTAL SLOPE

   Abstract:  Scientific observation was conducted in the commercial trip on the long-liner " ... ;Simeiz", operating under the Ukrainian flag, in the south-western Atlantic Ocean outside the ... exclusive (marine) economic zones of the foreign states (FAO statistical area 41) in the period from ... , accordingly. Sex ratio was 1:1 in the period from April till May, and 2:1 in the period from June till ...

   Meeting Document : WG-FSA-09/30 : Auteur(s): Yu.V. Korzun (Ukraine)

8. Does large-scale ocean circulation structure life history connectivity in Antarctic toothfish (Dissostichus mawsoni)?

   : successfully spawning fish spend only a part of their adult life history in the Ross Sea; areas in the eastern ... (Dissostichus mawsoni) in the Southeast Pacific Basin (SPB) and Ross Sea, with a life history structured by the ... environmental heterogeneity, yet the chemistry in otolith nuclei, deposited during early life, showed no ... differences. Age data showed only adult fish in catches on the Pacific-Antarctic Ridge in the SPB; and ...

   Meeting Document : WG-FSA-12/P02 : Auteur(s): J. Ashford, M. Dinniman, C. Brooks, A. Andrews, E. Hofmann, G. Cailliet, C. Jones and N. Ramanna

9. Information on incidental mortality of seabirds and other protected species in the US West Coast pelagic longline fishery

   vessels operating in the North Central-Eastern Pacific targeting broadbill swordfish (Xiphias gladius) and ... Abstract:  Although the IATTC does not have an established observer program in its longline ... subject to pertinent US regulations as well as under the purview of IATTC. In response to a CCAMLR query ... in 2002, IATTC informed CCAMLR of this US observer program. Information about seabird bycatch ...

   Meeting Document : WG-FSA-03/39 : Auteur(s): D. Petersen, L. Enriquez and S. Fougner (USA)

10. Environmental variability and the behavioural dynamics of Antarctic fur seals in the South Atlantic

    Abstract:  Variability in the reproductive performance of marine predators may be a result of ... to link variability in predator performance with specific measurements of oceanographic variability ... . This study examined variation in the foraging behavior of lactating Antarctic fur seals (Arctocephalus ... gazella) over 15 years at the island of South Georgia in relation to major indices of southern hemisphere ...

    Meeting Document : WS-AREA 48-98/16 : Auteur(s): I.L. Boyd (UK)

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