Résultats de la recherche

1. Review of cetacean depredation in CCAMLR statistical subareas

   observed throughout the CCAMLR management area. Loss of fish through depredation can cause financial loss ... Abstract:  Depredation, the removal of fish from longlines by large marine predators, has been ... assessments through the underestimation of total mortality resulting from fishing and depredation combined. In ... other subareas the problem is known but not currently addressed. The areas in which the establishment of ...

   Meeting Document : WG-SAM-15/27 : Auteur(s): M. Soeffker (United Kingdom) and P. Tixier (France)

2. Analysis of trawl data from the South Georgia krill fishery

   middle of the day. Daytime trawls were also generally deeper and produced a larger catch. Individual ... South Georgia are examined and a range of descriptive measurements reflecting the operation of the ... focussed, operating in a limited area along the shelf edge on the northern coast of the island. Each day a ... large number of trawls were undertaken by each,vessel, with trawls being shorter in duration during the ...

   Meeting Document : WG-EMM-97/41 : Auteur(s): Parkes, G., Trathan, P.N., Everson, I., Murphy, E.J.

3. Effects of variability in prey abundance on reproduction and foraging in chinstrap penguins (Pygoscelis antarctica)

   , number of trips day–1, trip duration, number of dives trip–1 and dive rate) did not differ between years ... Abstract:  Life-history theory predicts that adults of long-lived species such as seabirds should ... offspring provisioning, the most energetically costly component of seabird parental care, adults need to ... contend with large interannual fluctuations in prey availability and hence the cost of chick provisioning ...

   Meeting Document : WG-EMM-06/P6 : Auteur(s): D.A. Croll, D.A. Demer, R.P. Hewitt, J.K. Jansen, M.E. Goebel and B.R. Tershy (USA)

4. Diet and foraging effort of Adélie penguins in relation to pack-ice conditions in the southern Ross Sea

   Abstract:  We investigated the diet and aspects of foraging effort among Adélie Penguins ... , Bird and Crozier-- during the chick provisioning period of three austral summers, 1994-95, 1995-96 and ... 1996-97. During the study period, pack-ice cover differed in waters offshore of these colonies, by ... present. With respect to krill, which composed the remainder of diet, juvenile Euphausia crystallorophias ...

   Meeting Document : WG-EMM-98/15 : Auteur(s): D.G. Ainley (USA), P.R. Wilson, K.J. Barton (New Zealand), G. Ballard, N. Nur (USA) and B. Karl (New Zealand)

5. Adélie penguin foraging behaviour and breeding success in seasons of contrasting krill availability (Mawson Coast, Antarctica)

   period. Data on meal mass and foraging trip duration were combined to provide an index of provisioning ... penguins at the Béchervaise Island CEMP site were compared between seasons of contrasting krill ... differences between the two seasons included A5: foraging trip duration, A6: breeding success and A8: meal ... particularly apparent during the late guard to early crèche stages of chick rearing, coinciding with the timing ...

   Meeting Document : WG-EMM-03/44 : Auteur(s): J. Clarke, M. Tierney, S. Candy, S. Nicol, L. Irvine and K. Kerry (Australia)

6. The diet of Antarctic fur seals Arctocephalus gazella during the breeding season at Heard Island

   summer season and again at the end when there was an influx of non-breeding male seals. During the middle ... Heard Island fed mainly on fish with an average 95.2% of scats in monthly collections containing fish ... remains. Pelagic myctophids constituted more than 50% of fish taken by fur seals at the beginning of the ... period from October to December, fish from the surrounding shelf area comprised the bulk of the diet ...

   Meeting Document : SC-CAMLR-VIII/BG/53 : Auteur(s): Delegation of Australia

7. Preliminary results of the experiments on the krill transport study in the South Orkney area (April 1992)

   contour and in the second two- loss of krill. The aggregation was 52 thous. t greater than the loss. The ... within the square of 30 x 30 miles northwestwards of Coronation Island in the fishing fleet operation ... area. The krill biomass was estimated within the square at the start and the end of works. It amounted ... assessment of krill density and oceanological stations were carried out along the square perimeter. Four ...

   Meeting Document : WG-CEMP-92/34 : Auteur(s): L.G. Maklygin, V.N. Shnar, A.P. Malyshko (Russian Federation) and A.G. Shepelev (Ukraine)

8. Differences in distribution and population structure of krill (Euphausia superba) between penguin and fur seal foraging areas near Seal Island

   , in the inshore foraging areas middle-sized krill (modal length 43 mm), which consisted mainly of ... areas of krill (≥250g/m2) were rather limited. In contrast, fur sea! foraging areas were formed in ... . 2-3 km in horizontal distance) of higher densities (≥250g/m2). In the inshore foraging areas krill ... vertical migration, staying close to the surface throughout the day. As for body size and maturity of krill ...

   Meeting Document : WG-KRILL-92/27 : Auteur(s): T. Ichii, H. Ishii (Japan), J.L. Bengtson, P. Boveng, J.K. Jansen (USA) and M. Naganobu (Japan)

9. The diet of Antarctic fur seals Arctocephalus gazella during the breeding season at South Georgia

   , the most numerous- fish taxon, 98% were taken between early February and the middle of March ... Abstract:  The diet of lactating female Antarctic fur seals Arctocephalus gazella at South Georgia ... was investigated during the pup rearing period (January- March) of 1991-1994. Antarctic Krill ... Euphausia superba was the main prey item, occurring in 88% of all scats (n=497), whereas fish occurred in 47 ...

   Meeting Document : WG-EMM-95/28 : Auteur(s): Arnould, J.P.Y., Reid, K.

10. Milk fatty acid signatures indicate both major and minor shifts in foraging ecology of lactating Antarctic fur seals

    Abstract:  Fatty acid signature analysis is based on the conservation and unique signatures of ... fatty acids in the marine food chain and it may be useful in determining the composition of seal diets ... ), mid (n=11), and late (n=8) foraging trip intervals, and demonstrate its use in detecting shifts in ... perinatal fast are derived largely from blubber mobilization and thus likely resemble an integration of ...

    Meeting Document : WG-EMM-97/14 : Auteur(s): Boyd, I.L., Iverson, S.J., Arnould, J.P.Y.

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