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Do Adélie penguin fledgling weights provide an index of prey availability?
the end of the breeding season were more strongly correlated with later foraging trips than with ... Abstract: We examine fledgling weights measured over 11 years at Béchervaise Island in relation ... to two assumed proxies of prey availability: breeding success and foraging trip duration. Concordance ... between the two proxies was apparent when considering guard stage foraging trip durations but this was not ...
Meeting Document : WG-EMM-05/21 : Автор(ы): L. Emmerson, C. Southwell and J. Clarke (Australia)
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Upward adjustments to local catch limits for the krill fishery in Subarea 48.1
values, agrees generally with expert opinion, and suggests that indices of foraging trip duration, fledge ... the gSSMUs defined in another compilation of vignettes (AERD 2016a, pp. 3-13). We propose upward ... founded on 1) a “stoplight” classification of predator performance to identify years when predator ... predator populations, 2) repeat acoustic surveys to identify years when local krill biomass increases ...
Meeting Document : WG-EMM-16/47 : Автор(ы): Antarctic Ecosystem Research Division, Southwest Fisheries Science Center and NOAA Fisheries
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Diet and foraging effort of Adélie penguins in relation to pack-ice conditions in the southern Ross Sea
years when pack ice was sparse. Foraging trip duration differed by colony, season and year and was ... was the most important prey, especially during years or periods within years when little pack ice was ... present. With respect to krill, which composed the remainder of diet, juvenile Euphausia crystallorophias ... increased as trip duration increased, to a point (2 d), but then decreased as duration increased further (up ...
Meeting Document : WG-EMM-98/15 : Автор(ы): D.G. Ainley (USA), P.R. Wilson, K.J. Barton (New Zealand), G. Ballard, N. Nur (USA) and B. Karl (New Zealand)
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By-catch of rays in the 2002/03 toothfish fishery around South Georgia
from all observers’ tally periods on the catch rates of rays cut off the line; • In 2003 the UK, with ... the number of rays that were likely to have died as a result of being caught on longlines using a ...
Meeting Document : WG-FSA-03/58 : Автор(ы): D.J. Agnew, J. Pearce and M. Endicott (United Kingdom)
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The diet of Antarctic fur seals Arctocephalus gazella during the breeding season at South Georgia
, the most numerous- fish taxon, 98% were taken between early February and the middle of March ... around South Georgia. The absence of group 3 krill (44-48 mm in length) in the South Georgia area, as ... pattern in three of the four years studied. Of the total number of the myctophid Protomyctophum choriodon ... diet studies to be conducted during the entire pup-rearing periods of several years. Author(s ...
Meeting Document : WG-EMM-95/28 : Автор(ы): Arnould, J.P.Y., Reid, K.
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Preliminary assessment of the South Georgia toothfish stock, 2007
estimates year class strength which corresponds, in some years, with estimates made from the South Georgia ... ). Fits of all data (CPUE; catches at length for the early fishery; catches at age for the later fishery ... retardation than larger fish, and that on average it is 1 year or more. 3. A new model is developed which uses ... Abstract: 1. The catch-at-length based CASAL model for toothfish at South Georgia is updated with ...
Meeting Document : WG-FSA-07/29 : Автор(ы): D.J. Agnew, R. Hillary and J. Pearce (United Kingdom)
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Updated models of the habitat use of Patagonian toothfish (Dissostichus eleginoides) on the Kerguelen Plateau around Heard Island and the McDonald Islands (Division 58.5.2)
stages, up to 2-3 years old, and the implications of sexual and phenotypic variability in growth and ... (Dissostichus eleginoides) in the CCAMLR area, with landings of >5000 t.yr-1 from the French EEZ (Division ... with depths suggesting spatial segregation of life stages. Spatial predictions showed that small ... larger fish inhabit deeper waters (>1500m) especially on the eastern part of the Plateau, where the ...
Meeting Document : WG-FSA-14/42 : Автор(ы): C. Péron and D.C. Welsford (Australia)
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A hypothetical life cycle for Antarctic toothfish Dissostichus mawsoni in Antarctic waters of CCAMLR Statistical Area 88
eastwards with the eastern Ross Sea gyre settling out along the continental slope and shelf to the east of ... northern area for up to 2–3 years. They then move southwards back onto the shelf and slope where ... and timing of spawning, and the probable early life history characteristics of toothfish, we ... larvae after an 18–24 month period suggested by the models agreed moderately well with the distribution ...
Meeting Document : WG-FSA-07/35 : Автор(ы): S.M. Hanchet, G.J. Rickard, J.M. Fenaughty, A. Dunn and M.J. Williams (New Zealand)
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Distribution and some biological features of icefish (Champsocephalus gunnari) at different life cycle stages in the South Georgia subarea
near the bottom where it is fished with bottom gears. The annual cycle of fish is subdivided into 3 ... Abstract: The results of icefish ecology were summarized for the period of above 20 years of ... that the life mode changed from pelagic one occurring at early life stages, to near-bottom- pelagic one ... for the most time and is fished with midwater trawl. Its diurnal migrations pattern is similar to that ...
Meeting Document : WG-FSA-99/65 : Автор(ы): Zh.A. Frolkina (Russia)
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Beach debris survey, Main Bay, Bird Island, South Georgia, 2002/03
Abstract: During the thirteenth year of standardised beach surveys of man-made debris at Bird ... with 26% of the total number of items collected during the winter. The total weight of debris collected ... ) compared to previous years. The greatest proportion of debris (95 %) was miscellaneous debris. The ... over the last decade, indicates that debris is still being lost by vessels into the marine environment ...
Meeting Document : SC-CAMLR-XXIII/BG/13 : Автор(ы): Delegation of the United Kingdom
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