Résultats de la recherche
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Annual variation in the timing of reproduction in Antarctic fur seals (Arctocephalus gazella) at Bird Island, South Georgia
other year. Female arrival, estimated by pup birth date where necessary, was highly synchronous: it ... usually started when 80% or more of potential territory sites were occupied by males. Cows arrived ... , which is less synchronous within years than female arrival, was significantly later in 1987 than in any ...
Meeting Document : WG-CEMP-90/39 : Auteur(s): C.D. Duck (United Kingdom)
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Management of C. gunnari in Subarea 48.3
ecosystem than we have at present. There is therefore a need for an interim approach to setting ... precautionary catch limits for this fishery. An approach based on the general yield model is described, which ... fisheries and research surveys leading to estimates of stock biomass. An extension of this scheme would use ... can be used to calculate an appropriate proportion of an estimate of Bo which could be taken by ...
Meeting Document : WG-FSA-97/38 : Auteur(s): Kirkwood, G.P., Parkes, G.B., Everson, I., Agnew, D.J.
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A proposal methodology to assess the Patagonian toothfish stock abundance at CCAMLR Subarea 48.3 using ASPM
Abstract: The ASPM is an integrated modeling technique used in stock assessment of different D ... information sources, such as catch and age and size data from fishing fleet, surveys and others abundance ... 48.3 shows an acceptable fit to CPUE series and catch-length-proportions (WG-FSA-SAM 05/5 and WG-FSA-05 ... /73). In this paper the methodology and assumptions for the 2006 TOP assessment at CCAMLR Subarea 48.3 ...
Meeting Document : WG-FSA-06/59 : Auteur(s): O.C. Wöhler and P.A. Martínez (Argentina)
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A RE-ANALYSIS AND UPDATE OF THE ANTARCTIC KRILL BIOMASS IN THE SOUTH SHETLAND ISLANDS, THROUGH 2011
-based estimates of krill density and recruitment are recalculated for the years 1996 through 2011 ... based data show that 2011 was a year of good recruitment, following two years of low recruitment. Krill ... . Recent changes in the acoustic methodology and target strength models are the basis for the recalculation ... . The time series of acoustic biomass indicate that krill have varied by more than an order of magnitude ...
Meeting Document : WG-EMM-11/26 : Auteur(s): A. Cossio, C. Reiss and R. Driscoll (USA)
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Foraging location and range of white-chinned petrels Procellaria aequinoctialis breeding in the South Atlantic
covered at night (47%) was the same. Mean (31- 34 km/h) and maximum (80 km/h) flight velocities were ... extensively. Most locations were between 30° to 55 °W and 52 °to 60 0W around South Georgia/Shag Rocks and ...
Meeting Document : WG-FSA-99/20 : Auteur(s): S.D. Berrow, A.G. Wood and P.A. Prince (United Kingdom)
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Krill population dynamics at South Georgia 1991–1997, based on data from predators and nets
biomass in the following year. Similar recruitment failure in the same years is evident in krill ... samples from late summer (March). From the 7-year predator time-series, within-year variation was greatest ... and thereafter increased steadily to 1997. Using these data in conjunction with putative size/age ... -group cohorts in the length-frequency distribution, we suggest that year's of high mean krill ...
Meeting Document : WS-AREA 48-98/15 : Auteur(s): K. Reid, J. Watkins, J. Croxall and E. Murphy (UK)
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Proposals on standardization of toothfish resource research
efforts by years and research blocks do not allow obtaining scientific-based data for understanding the ... discussed in the context of discussion at the Scientific Committee and the CCAMLR Commission in 2018 ... accompanied by standard procedures for trawl adjusting and monitoring of its parameters. These procedures are ... mandatory for all ships participating in the survey. At the same time, methodological aspects of the multi ...
Meeting Document : WG-SAM-2019/34 : Auteur(s): S. Kasatkina
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Pygoscelis penguin colonies census in the Vernadsky Antarctic station area (Statistical Subarea 48.1)
provided during 2017-2018 breeding season. The Pygoscelis penguins in the region of research are mainly ... : No Delegation responsibility for releasing documents: CCAMLR Secretariat ... , which has been observed throughout the area during recent years. The nesting of the Antarctic penguin in ...
Meeting Document : WG-EMM-18/25 : Auteur(s): V.M. Smagol, A.O. Dzhulay, I.V. Dykyy and G.P. Milinevsky
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Pygoscelis penguin census in the Vernadsky Antarctic station area
been provided during 2017-2018 breeding season. The most abandoned Pygoscelis penguin species in the ... responsibility for releasing documents: Ukraine ... species, which has been observed throughout the area during recent years. The nesting of the Antarctic ...
Meeting Document : SC-CAMLR-XXXVII/BG/06 : Auteur(s): V.M. Smagol, A.O. Dzhulay, I.V. Dykyy, G.P. Milinevsky and E.O. Dykyy
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A method to evaluate selection of Antarctic krill in towed fishing gears
Abstract: The pelagic trawlers involved in the fishery for Antarctic krill (Euphausia superba ... is valuable information for the management of harvested marine stocks. Size selectivity data is ... the time. FISHSELECT is developed as an alternative method, and is based on thorough measurements of ... for E. superba. We present design guides that predict the basic selective properties for E. superba in ...
Meeting Document : WG-EMM-13/34 : Auteur(s): L.A. Krag, B. Herrmann (Denmark), S. Iversen, A. Engås, S. Nordrum and B.A. Krafft (Norway)