Search results
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Adult male Antarctic fur seals: tourists, trouble makers or marine ecosystem sentinels?
functional responses of each species. We highlight this by collecting at-sea habitat use of adult male ... through the partitioning of resource exploitation either temporally or spatially. Understanding the ... , characterizing the competitive interactions between these species is key to disentangling the drivers of ... breeding Chinstrap penguins in the Bransfield Strait at a time when fishing effort is minimal, as well as ...
Meeting Document : WG-EMM-2019/49 : Author(s): A. Lowther, C. Lydersen and K. Kovacs
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Application of aerial photography for ecological survey and habitat management of Adélie penguins
survey at large scale breeding sites of penguins. To compensate for these shortcomings of the classical ... method, we tested the effectiveness of aerial photography for penguin monitoring at Cape Hallett. Images ... Abstract: There are some limits to the accurate counting of the total number of nests by ground ... some of the colonies because it was difficult to access those areas located below the mountain slope ...
Meeting Document : WG-EMM-18/38 : Author(s): J.-H. Kim, H.-C. Kim, J.-I. Kim, C.-U. Hyun, J.-W. Jung, Y.-S. Kim, H. Chung and H.C. Shin
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ENVIRONMENTAL, SPATIAL, TEMPORAL AND OPERATIONAL EFFECTS ON THE INCIDENTAL MORTALITY OF BIRDS IN THE LONGLINE FISHERY IN THE CROZET AND KERGUELEN AREAS 2003–2006
basis of the conclusions of this analysis we suggest a series of recommendations aimed at reducing this ... incidental mortality, failing which the population of grey petrels at Kerguelen will most probably face ... estimate of mortality derived from these observations amounts to between 7 766 and 10 541 birds caught. The ... great majority (between 84 and 91% depending on the season) were white-chinned petrels, the males of ...
Meeting Document : SC-CAMLR-XXVII/12 : Author(s): Delegation of France
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TROPHIC OVERLAP OF WEDDELL SEALS (LEPTONYCHOTES WEDDELLI) AND ANTARCTIC TOOTHFISH (DISSOSTICHUS MAWSONI) IN THE ROSS SEA, ANTARCTICA
prey) will vary between different life history stages at different times of the year in different areas ... at all. Diver observations suggest that seals may feed selectively on only parts of toothfish so that ... inconclusive. We recommend further research using stable isotope analysis of blood samples from seals not at ... the breeding colonies, and samples of muscle or other slower-turnover tissue of seals at the breeding ...
Meeting Document : WG-EMM-08/43 : Author(s): M.H. Pinkerton, A. Dunn and S.M. Hanchet (New Zealand)
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An examination of latitudinal variation in the growth rates of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea
conducted. Length-at-age of Dissostichus mawsoni was compared across five zones in a 15.5° latitudinal range ... in the length-at-age data. There is no statistically significant difference in mean growth rates of D ... Abstract: Following a finding that a small sample of aged Dissostichus mawsoni from McMurdo Sound ... (62.5°–78.0° S). Between-zone comparisons were confounded by marked differences in the age structure of ...
Meeting Document : WG-FSA-03/30 : Author(s): P.L. Horn (New Zealand)
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Analysis of the diet of Champsocephalus gunnari in Subarea 48.3, Dr E. Holmberg survey, February 1995
empty stomachs (also at Shag Rocks), close to the values reported for years of krill scarcity. While no ... Abstract: About 1300 stomach contents of the icefish Champsocepha1us gunnari caught in the ... Subarea 48.3 in February 1995, were analyzed using the frequency of occurrence (%) method. Krill ... (Euphausia superba) (58%) and the amphipod hyperiid Themisto gaudichaudii (55%) occurred similarly at South ...
Meeting Document : WG-FSA-95/36 : Author(s): Marschoff, E., Barrera-Oro, E., Casaux, R.
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Biological parameters for icefish (Chionobathyscus dewitti) in the Ross Sea, Antarctica
February, but this was limited, probably due to the short temporal distribution of the data. Length-at ... -maturity and age-at-maturity ogives indicated that 50% of the fish sampled were mature at about 340–360 mm ... (TL) and about 3–4 years of age and that 95% were mature at about 370–400 mm (TL) and 6–8 years of age ... , diet, and age estimation. All of the icefish sampled were identified as Chionobathyscus dewitti, and ...
Meeting Document : WG-FSA-07/25 : Author(s): C.P. Sutton, M.J. Manning, D.W. Stevens, P.M. Marriott (New Zealand)
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Beach litter survey, Signy Island, South Orkney Islands 1994/95
origin noted. At Foca Cove, a total of 91 items were found with a combined weight of 18.26 kg. At ... Cummings Cove, a total of 90 items were found (22.79 kg) and at Starfish Cove, a total of 27 items were ... sustained decline in the incidence of marine litter found at Signy as ships complied with international ... dumping of rubbish from ships or discarded gear from fishing vessels, rather than from either of the ...
Meeting Document : CCAMLR-XIV/BG/15 : Author(s): Delegation of the United Kingdom
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Identification of Amblyraja species in the longline fishery in Subarea 48.3 – CCAMLR
A.georgiana. Male A. sp.anon attain 50% maturity at a total length of 97cm, 13 cm greater than the length at ... captures of A.sp.anon were found at depths >1000m, where 85% of A.georgiana were caught in depths ... 50% maturity for A.georgiana. Comparisons of colour and patternation were found to be consistent ... proportionally longer claspers to total length (2.77% difference between averages) than male A.sp.anon. 94% of ...
Meeting Document : WG-FSA-02/54 : Author(s): M. Endicott (United Kingdom), L.J.V. Compagno (South Africa) and D.J. Agnew (United Kingdom)
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Modelling Movement of Antarctic Krill (MMAK): the importance of retention, dispersal and behaviour for krill distribution – a project update
investigate the impact of physical and behavioural processes on the distribution of krill in this area, at ... Antarctic Wildlife Research Fund, to improve current understanding of the regional and local-scale processes ... that influence the distribution of Antarctic krill in CCAMLR Area 48, focussing in particular on the ... South Orkney Islands region. MMAK uses modelling studies at varying spatial and temporal resolutions to ...
Meeting Document : WG-EMM-18/06 : Author(s): S.E. Thorpe, E.F. Young, E.J. Murphy, O.R. Godø and A.H.H. Renner