Résultats de la recherche
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DRAFT SOFTWARE USER GUIDE FOR: ICESCAPE: INTEGRATING COUNT EFFORT BY SEASONALLY CORRECTING ANIMAL POPULATION ESTIMATES
in the R language for statistical computing (R Development Core Team 2008), aims to adjust raw count ... data for availability and perception bias, and account for sampling fractions less than unity, in order ... conditions. In Antarctica, adjustment for availability is particularly important, because difficulties in ... accessing breeding sites often lead to counts of land-breeding predators being taken at suboptimal times in ...
Meeting Document : WG-SAM-09/16 : Auteur(s): J. McKinlay, C. Southwell and R. Trebilco (Australia)
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Histopathology of Antarctic krill, Euphausia superba, bearing black spots
superba, since January, 2001. To study the nature of the black spots, the krill were sampled in the winter ... of 2003, 2006, and 2007 in the South Georgia region, the Antarctic Ocean. Histological observations ... bacteria or amorphous material. In the 2007 samples, 42% of the krill had melanized nodules. Most of the ... genes. More than three bacterial species or strains were also confirmed by in situ hybridization for 16S ...
Meeting Document : WG-EMM-08/P09 : Auteur(s): S. Miwa, T. Kamaishi, T. Matsuyama, T. Hayashi and M. Naganobu
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UPDATED BIOLOGICAL PARAMETERS FOR THE ANTARCTIC STARRY SKATE, AMBLYRAJA GEORGIANA, FROM THE ROSS SEA
Abstract: Photographs of skates taken by observers on New Zealand toothfish longliners in the ... examined in the laboratory. There was no significant difference between the median length at maturity for ... of these were returned in good condition and were considered likely to survive. Estimates of the ... proportion released in good condition are in the range 50–80%, depending on assumptions about whether skates ...
Meeting Document : WG-FSA-08/20 : Auteur(s): M.P. Francis and S. Mormede (New Zealand)
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Important aspects of prey distribution for the formation of foraging areas of chinstrap penguins and Antarctic fur seals at Seal Island
. Chinstrap penguins foraged in two modes during chick-brooding period: daytime foraging chinstrap penguins ... foraged in the inshore region, while overnight foraging penguins foraged in the slope region. It was ... difficulty in perceiving prey at night. Antarctic fur seals foraged mostly in the slope/offshore region ... during pup-rearing period. It was suggested that important factors may be mainly 4) and 6). In conclusion ...
Meeting Document : WG-EMM-97/28 : Auteur(s): Bengtson, J.L., Hiruki, L.M., Naganobu, M., Ichii, T., Meyer, W.R., Cameron, M.F., Boveng, P., Takao, T., Miura, A., Jansen, J.K., Kawaguchi, S., Hayashi, T.
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A tale of two islands: contrasting fortunes for sub-Antarctic skuas at the Prince Edward Islands
at the Prince Edward Islands was conducted during December 2008, repeating a previous survey in ... supported twice as many non-breeding birds. Burrowing petrels comprised 96% of prey in skua middens at ... coverage in 2008, whereas the number of skua nests on Marion Island was barely half that counted in 2001 ... , continuing an apparent decrease in this species at Marion Island since the 1980s. There is no evidence that ...
Meeting Document : WG-EMM-10/P03 : Auteur(s): P.G. Ryan, P.A. Whittington and R.J.M. Crawford
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Using stationary acoustic platforms to assess precision and accuracy of acoustical krill surveys
Abstract: The current CCAMLR protocol specifies daytime acoustic sampling in order to avoid ... issues of diel changes in acoustic scattering strengths. However, due to logistic constraints, acoustic ... a regular basis deployed stationary platforms in the main area for commercial krill harvesting at ... the South Orkney Islands since 2014, and in this report some of these data have been analysed in order ...
Meeting Document : WG-EMM-2019/32 : Auteur(s): T. Klevjer, G. Skaret and B.A. Krafft
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The living planet index
Abstract: UNEP-WCMC is developing further an approach for measuring and communicating trends in ... biodiversity captured in the Living Planet Index. The Index is based on average trends in populations of ... several hundred vertebrate species from around the world, and UNEP is interested in including CCAMLR data ...
Meeting Document : WG-EMM-04/16 : Auteur(s): Secretariat
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Diets of sympatrically breeding Adélie, gentoo and chinstrap penguins from Admiralty Bay, South Shetland Islands, Antarctica, 1981 to 2000
-annual variability in mean food load sizes during chick rearing and there was a high degree of coherence ... among the three species in the years of high versus low food loads. Adélie and chinstrap penguin adults ... experienced significant declines in body weight during the chick provisioning period in several of the latter ... Living Resources (AMLR) marine surveys in the area. Finally, we examined the digested portion of the ...
Meeting Document : WG-EMM-03/29 : Auteur(s): W.Z. Trivelpiece (USA), K. Salwicka (Poland) and S.G. Trivelpiece (USA)
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Comparative studies on the biological and acoustical properties of krill aggregations (Euphausia superba Dana) samples during the XIII Italian Expedition to the Ross Sea (December 1997–January 1998)
Abstract: During the XIII Italian Expedition to the Ross Sea in late spring and early summer ... the Euphausia superba) and acoustical (differences in volume back-scattering strength of krill ... recordings during the hauls. The surveyed area extended from 71° to 76°' S in latitude and from 164° E ... to 177° W in longitude. The aim of the paper is: (1) to compare the species/length composition of ...
Meeting Document : WG-EMM-00/39 : Auteur(s): M. Azzali, J. Kalinoswki, G. Lanciani and I. Leonori (Italy)
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Fatty acid signature analysis from the milk of Antarctic fur seals and southern elephant seals from South Georgia: implications for diet determination
used in marine ecosystems in which diet determination by more direct methods is difficult and sometimes ... misleading. This study examined fatty acid profiles in milk from two species of pinniped from the Southern ... fur seals (Arctocephalus gazella) in 3 consecutive years, from 1991- 1993 (n=72) and from Southern ... elephant seals (Mirounga leonina) in 1988 (n=53) at South Georgia. Lipids were extracted and fatty acid ...
Meeting Document : WG-EMM-99/44 : Auteur(s): D.J. Brown, I.L. Boyd, G.C. Cripps and P.J. Butler (United Kingdom)