Результаты поиска

1. 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 : Автор(ы): D.A. Croll, D.A. Demer, R.P. Hewitt, J.K. Jansen, M.E. Goebel and B.R. Tershy (USA)

2. 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 : Автор(ы): D.G. Ainley (USA), P.R. Wilson, K.J. Barton (New Zealand), G. Ballard, N. Nur (USA) and B. Karl (New Zealand)

3. 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 : Автор(ы): J. Clarke, M. Tierney, S. Candy, S. Nicol, L. Irvine and K. Kerry (Australia)

4. 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 : Автор(ы): Delegation of Australia

5. Biogeographic patterns of benthic invertebrate megafauna on shelf areas within the Southern Ocean Atlantic sector

   Paper Title:  Biogeographic patterns of benthic invertebrate megafauna on shelf areas within the ... Southern Ocean Atlantic sector Abstract / Description:  Bioregionalisation of Antarctic and Southern Ocean ... shelf communities ideally incorporates a range of data on physical, environmental and biological ... properties. Analysis of the benthic invertebrate megafaunal assemblages of shelf habitats within the Atlantic ... shelves east of the main chain including Elephant Island and those north of the Antarctic Peninsula ... George Island, west and northwest of Elephant Island and north- east of Joinville Island. Lockhart ... islands themselves the trend is west to east, whereby a region of low biomass on the western shelf ... shelf of South Georgia are dominated by Echinodermata but biomass dominance is replaced further east ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 167–192 : Автор(ы): Lockhart, S.J. and C.D. Jones

6. 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 : Автор(ы): L.G. Maklygin, V.N. Shnar, A.P. Malyshko (Russian Federation) and A.G. Shepelev (Ukraine)

7. 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 : Автор(ы): T. Ichii, H. Ishii (Japan), J.L. Bengtson, P. Boveng, J.K. Jansen (USA) and M. Naganobu (Japan)

8. Distribution and size–age composition of Antarctic krill (Euphausia superba) in the South Orkney Islands region (CCAMLR Subarea 48.2).

   Paper Title:  Distribution and size–age composition of Antarctic krill (Euphausia superba) in the ... composition and biological condition of Antarctic krill (Euphausia superba) caught by the Russian krill ... distribution of size–age groups in association with particular water masses indicated that age 2+ krill ... dominated in cold Weddell Sea waters in the southern parts of the fishing area, while older age classes (3 ... estimating the size–age structure of pop- ulations based on length-frequency distributions (Marr, 1962 ... life-span of E. superba range from 3 to 8 years (Marr, 1962; Makarov, 1983; Aseev, 1984; Ikeda, 1984 ... of Euphausia superba Dana. Antarctic, 22: 107–120 (in Russian). Marr, J.W.S. 1962. The natural ... Understanding the population structure of Antarctic krill (Euphausia superba) is one of the major issues for ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 123–134 : Автор(ы): Sologub, D.O. and A.V. Remeslo

9. Fishes of the Ross Sea Region – A field guide to common species caught in the longline fishery

   working on toothfish longline fishing vessels to identify the main species of fishes taken in the Ross Sea ... region of Antarctica. Technical terms are kept to a minimum, and identification features are mostly those ... species of crocodile icefishes (Channichthyidae), and cod icefishes (Nototheniidae). It does not cover all ... about the identification of some of the fishes, and taxonomic study (beyond the scope of this guide) is ... . Often flattened and broad posteriorly. Median fins. Unpaired fins located in the middle of the upper ... features: Middle lateral line with 64 to 77 tubed scales, extending forward to near the rear edge of the ... canine-like teeth near the middle of the upper jaw. Colour: Large individuals are brownish-grey on ... short middle lateral line of 35 to 48 tubed scales, with the front end of the line separated from the ...

   Document : Site Section: Publications

10. 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 : Автор(ы): Arnould, J.P.Y., Reid, K.

Страницы