Résultats de la recherche
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Document de travail : proposition - Surveillance par satellite de la zone de la CCAMLR
Author(s): Delegation of France Title: 2018 – France working paper proposal – Satellite ...
Meeting Document : CCAMLR-XXXVII/25 : Auteur(s): Delegation of France
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Foraging energetics of Antarctic fur seals in relation to changes in prey availability
account for the observed between-year difference in at-sea FMR of C. ursinus while foraging-trip duration ... lactating female Antarctic fur seals, Arctocephalus gazella, foraging at sea was measured in two years using ... doubly labeled water at South Georgia Island. There was no difference between years in mass gain, water ... influx, mass-specific field metabolic rate (FMR), or absolute FMR. Mean at-sea FMR over both years was ...
Meeting Document : SC-CAMLR-VIII/BG/13 : Auteur(s): Delegation of United Kingdom
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Population demography of Antarctic fur seals: the costs of reproduction and implications for life-histories
population size. 4. There was no evidence of senescence. Survival rate was not related to year of birth or ... age, after accounting for variation due to pregnancy and calendar year. Survival was reduced as a ... animals having been pregnant in the previous year. 6. Reproduction incurs costs to females, in terms of ... consecutive years, including 3 years when several indices showed that food availability was well below average ...
Meeting Document : WG-EMM-95/26 : Auteur(s): Reid, K., Croxall, J.P., Lunn, N.J., Boyd, I.L.
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A Comparison Between Age Determinations of the Antarctic Fish Notothenia gibberifrons Lönnberg Using Scales and Otoliths
were interpreted 60% of scale readings and 30% separate and simultaneous interpretations. Estimates of ... derived from scales are approximately 30% greater than predictions utilising age data derived from ...
Meeting Document : WG-FSA-89/13 : Auteur(s): R. Coggan (United Kingdom), K. Skora (Poland), A. Murray and M. White (United Kingdom)
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A brief outline of the biology of the Antarctic silverfish, Pleuragramma antarcticum Boulenger, 1902 (Nototheniidae) from the Antarctic Indian Ocean
three relatively isolated groups. Fish aged from 0+ to 3+ years live in the epi- mesopelagic zone where ... there are macro aggregations of plankton, while fish aged from 3+ to 12+ years form near-bottom, pelagic ... when they reach 13-16 cm in length and 4-6 years of age. Males reach maturity at 12-18 cm in length and ... 4-7 years of age. The potential absolute and relative fertility of this species is one of the ...
Meeting Document : WG-FSA-92/11 Rev. 1 : Auteur(s): V.V. Gerasimchuk (Ukraine)
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Age distribution of breeding female Antarctic fur seals in relation to changes in population growth rate
1971-1973 was 7.41 (SE = 0.26) years and in 1988 it was 6.93 (SE = 0.20) years. After correction for ... age-dependent arrival time at the pupping beach in 1988, the mean age was 6.22 (SE = 0.14 years ... -1972. Exponential models fitted to the frequency distribution of age-classes greater than age 5 years ...
Meeting Document : WG-CEMP-91/21 : Auteur(s): I.L. Boyd, N.J. Lunn, P. Rothery and J.P. Croxall (United Kingdom)
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A preliminary assessment of age and growth of eel cod (Muraenolepis sp.) and violet cod (Antimora rostrata) in the Ross Sea, Antarctica
estimated age of 9.5 years. Von Bertalanffy parameters derived from female and unsexed fish only are: L ... ., 42.8 cm TL; K, 0.408 y-1; t0,-0.1 years. Violet cod are relatively long-lived, with a maximum estimated ... age of 41.5 years. Von Bertalanffy parameters derived from female and unsexed fish only are: L., 78.4 ... cm TL; K, 0.053 y-1; t0, 0.1 years. Author(s): P.L. Horn and C.P. Sutton (New Zealand) Title: A ...
Meeting Document : WG-FSA-10/19 : Auteur(s): P.L. Horn and C.P. Sutton (New Zealand)
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Evaluation of Antarctic krill biomass and distribution off the South Orkney Islands 2011-2015
coverage in all years except 2013. The results show that except from the year 2015, krill densities were ... . 8 million tons of krill within the stratum in the peak year 2014. There were also consistently ... assessments, but the frequencies operated varied between vessels and years. In addition, the survey coverage ... has varied between years in particular due to ice. In order to allow for comparison of distribution ...
Meeting Document : WG-EMM-15/54 : Auteur(s): G. Skaret, B.A. Krafft, L. Calise (Norway), J. Watkins (UK), R. Pedersen and O.R. Godø (Norway)
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Increasing abundance of Type A killer whales (Orcinus orca) in the coastal waters around the Antarctic Peninsula
increasing in recent years, including observations of predation on a number of whale and pinniped species ... . Here we integrate satellite telemetry (n = 10 tags) and photo-identifications (13 years, 15,828 ... to 3048 km from tagging site). Photographic re-sightings of the same whales were common across years ... (up to 13 years), and a Bayesian mark-recapture analysis estimated that the average annual abundance ...
Meeting Document : WG-EMM-17/49 : Auteur(s): H. Fearnbach, J.W. Durban, D.K. Ellifrit and R.L. Pitman
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Longterm monitoring of krill recruitment and abundance indices in the Elephant Island area (Antarctic Peninsula)
the representativeness of the study area (60°- 62°30'S and 53°- 57°30 'W) for the ... confirmed by the present analysis. Results are compared for one (R1) and two year old (R2) age classes ...
Meeting Document : WG-EMM-96/45 : Auteur(s): de la Mare, W., Loeb, V., Siegel, V.