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Population demography of Antarctic fur seals: the costs of reproduction and implications for life-histories
consecutive years, including 3 years when several indices showed that food availability was well below average ... , to estimate the rate of increase of the population as 10•7% per annum. 3. The average annual survival ... age 3–4 years, pregnancy rate peaked at age 8 years and declined thereafter. Otherwise pregnancy rate ... animals having been pregnant in the previous year. 6. Reproduction incurs costs to females, in terms of ...
Meeting Document : WG-EMM-95/26 : Автор(ы): Reid, K., Croxall, J.P., Lunn, N.J., Boyd, I.L.
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Recent population estimates and trends in numbers of albatrosses and giant petrels breeding at the sub-Antarctic Prince Edward Islands
(3% per year). The estimate of Indian yellow-nosed albatrosses T. carteri at Prince Edward Island was ... increased by almost 6% per year at Marion Island since 1996. Counts of both giant petrels increased at ... (pairs) at the two islands are 3 650 wandering albatrosses, 9 500 grey-headed albatrosses, 7 000 Indian ... are reasonably healthy despite fishing mortality. (Afr. J. Mar. Sci., 31 (3) (2009): 409–417) Author(s ...
Meeting Document : WG-EMM-10/P04 : Автор(ы): P.G. Ryan, M.G.W. Jones, B.M. Dyer, L. Upfold and R.J.M. Crawford
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Monitoring a marine ecosystem using responses of upper trophic level predators
South Georgia (Southern Ocean) using up to 27 variables measured over 22 years from 3 upper trophic ... had the greatest influence. 3. Principal components analysis showed that variables representing ... followed by variables representing diet. 4. There were 3 years in which the CSI showed extreme and ... CSI was calculated for each species individually. 6. Separate analysis of variables that were likely ...
Meeting Document : WG-EMM-01/25 : Автор(ы): I.L. Boyd and A.W.A. Murray (United Kingdom)
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Net diagrams for Chinese vessels notified for krill fishery in 2015/16 Notification ID 86733, 86772 and 86773
fishery in the 2015/16 fishing season submitted for the Chinese vessels: LONG TENG (Page 3-5); LONG FA ... (Page 6-8); LONG DA (Page 9-10); FU RONG HAI (Page 11-12); KAI LI (Page 13-14); KAIYU (Page 15-16); MING ...
Meeting Document : WG-EMM-15/02 : Автор(ы): Delegation of the People’s Republic of China
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Progress report on the research longline fishery of Dissostichus spp. in Subarea 48.6 being jointly undertaken by Japan and South Africa: 2012/13
and South Africa during the first 6 months is presented. Two vessels participated in the fishery and ... recaptures were recorded, of which 3 were within year recaptures. Only minor modifications are suggested to ... the current research plan for the 2013/14 season. The current requirement for an minimum spacing of 3 ...
Meeting Document : WG-SAM-13/05 : Автор(ы): R. Leslie (South Africa), K. Taki, T. Ichii (Japan) and S. Somhlaba (South Africa)
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Net-based verification of acoustic techniques used to identify Antarctic krill
' using an SDWBA-derived range for Sv120-3, (iii) '2 freq 2-16'- with an Sv120-38 range ... identified only 6 of the 16 krill aggregations sampled the nets. contrast the '2 freq model' and ... frequency techniques. Such results indicate that use of the present SDWBA-derived ranges in the CCAMLR 3 ...
Meeting Document : SG-ASAM-09/04 : Автор(ы): J. Watkins and S. Fielding (United Kingdom)
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Slow recovery of previously depleted demersal fish at the South Shetland Islands, 1983–2010
during preceding years. Modal age changed from 2-3 to 6-7 yr. Length data of G. gibberifrons, available ... precautionary and disallowing depletion beyond which a stock can recover in 2-3 decades, may be unrealistic in ...
Meeting Document : WG-FSA-12/P01 : Автор(ы): E.R. Marschoff, E.R. Barrera-Oro, N.S. Alescio and D.G. Ainley
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Long-term changes in the size composition of fjord Notothenia rossii, Gobionotothen gibberifrons and Notothenia coriiceps at Potter Cove, after the 1978–1980 fishery in the area
length distributions observed between 1982/83 and 1985/86, where the modal age changes from 2/3 to 6/7 ... 1986/7 and the duration of the inshore phase of the species, which is known to last for 6-7 years. In ...
Meeting Document : WG-FSA-07/52 : Автор(ы): E.R. Marschoff, E.R. Barrera-Oro and N.S. Alescio (Argentina)
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ACOUSTIC IDENTIFICATION AND SIZE ESTIMATION OF EUPHAUSIIDS
resources in the southern ocean. During the International Polar Year 2008, RV “G.O. Sars” spent 3 months in ... . Krill were identified from the relative frequency response of a 6-frequency hull-mounted echo-sounder ...
Meeting Document : SG-ASAM-09/08 : Автор(ы): R. Korneliussen and G. Skaret (Norway)
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Age and Length Growth of Champsocephalus gunnari, Lonnberg 1905 (Pisces, Chaenichthyidae, in the Area of Elephant Island, West Zone, Antarctica
and 6 year old males and 3, 4 and 5 year old females were found. The growth curves were adjusted ...
Meeting Document : WG-FSA-85/11 : Автор(ы): A.P. Tomo and E. Barrera-Oro (Argentina)
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