Search results
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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 ... . 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 result of pregnancy which accounted ... reproductive output (ages 5-8 years). 5. Mean pregnancy rate was 0•70 (SD = 0•11) with an interannual range ...
Meeting Document : WG-EMM-95/26 : Author(s): Reid, K., Croxall, J.P., Lunn, N.J., Boyd, I.L.
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The recent decline in recruitment of Gobionotothen gibberifrons in the South Shetland Islands (CCAMLR Subarea 48.1)
extent Antarctic fish stocks recover from exploitation and how natural causes may add to man-made ... a number of years of very low recruitment around Elephant Island and the lower South Shetland Islands ... Antarctic fish stocks recover from exploitation and how natural causes may add to man-made perturbations ... caused a number of years of very low recruitment around Elephant Island and the lower South Shetland ...
Meeting Document : WG-FSA-12/20 : Author(s): K.-H. Kock (Germany) and C.D. Jones (USA)
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Modelling egg and larval transport of Antarctic Toothfish (Dissostichus mawsoni) in the East Antarctic region: Plan
to be fully understood. Especially in early life stage, the process of successful egg/larval transport pattern ... years unique satellite product data and ocean model output data. This work examines not only passive ... to be fully understood. Especially in early life stage, the process of successful egg/larval transport pattern ... years unique satellite product data and ocean model output data. This work examines not only passive ...
Meeting Document : WG-SAM-2019/20 : Author(s): M. Mori, K. Mizobata, T. Okuda and T. Ichii
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Revision of biological and population parameters for Dissostichus eleginoides on the Heard Island Plateau (Division 58.5.2) based on a comprehensive survey of fishing grounds and recruitment areas in the region
that the variability of recruitment at Heard Island is much greater than originally estimated and that, in recent years ... in the early 1990s. A notable outcome of the 1999 survey is the identification of Ground B as the most ... important area for 7 to 8 year old fish in the Heard Island region. Careful thought will need to be given ... to how best to manage a stock that aggregates in this manner while still juvenile and with some years ...
Meeting Document : WG-FSA-99/68 : Author(s): A.J. Constable, R. Williams, T. Lamb and E. van Wijk (Australia)
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Information on the status of fjord Notothenia rossii, Gobionotothen gibberifrons and Notothenia coriiceps in the lower South Shetland Islands derived from a long-term monitoring program (1983–2006) at Potter Cover
of twenty four years, and at Harmony Cove, Nelson Island, in the austral summers from 2001 to 2003 ... catches from 1991 to 2006, the actual levels are half of those found in the early 1980s, while those ... showed an increase in years 2002-2003, whereas G. gibberifrons was absent in the catches. These trends ... years, and at Harmony Cove, Nelson Island, in the austral summers from 2001 to 2003. The decline ...
Meeting Document : WG-FSA-06/25 : Author(s): E.R. Barrera-Oro and E.R. Marschoff (Argentina)
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Surface water masses, primary production, krill distribution and predator foraging in the vicinity of Elephant Island during the 1989-90 austral summer
of it. A second front was apparent at the eastern side of the study area and was tentatively identified ... at the eastern side of the study area and was tentatively identified as the western end of the Weddell-Scotia ...
Meeting Document : WG-CEMP-90/11 : Author(s): A.F. Amos, J.L. Bengtson, O. Holm-Hansen, V.J. Loeb, M.C. Macaulay and J.H. Wormuth (USA)
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A model at the level of the foraging trip for the indirect effects of krill (Euphausia superba) fisheries on krill predators
Abstract: We present a model at the level of the foraging trip for the effects of a fishery ... appropriate for the predators (and the fishery) fluctuates from one year to the next according to an age ... . Author(s): M. Mangel and P.V. Switzer (USA) Title: A model at the level of the foraging trip ... We present a model at the level of the foraging trip for the effects of a fishery on krill ...
Meeting Document : WG-EMM-98/48 : Author(s): M. Mangel and P.V. Switzer (USA)
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An 8-year cycle in krill biomass density inferred from acoustic surveys conducted in the vicinity of the South Shetland Islands during the austral summers of 1991/1992 through 2001/2002
years and indications that ice cover in the winter of 2002 is seasonally early and extensive. Author ... fit to the biomass density time series is dominated by an 8-year cycle and predicts an increase ... (s): R.P. Hewitt, D.A. Demer and J.H. Emery (USA) Title: An 8-year cycle in krill biomass density inferred ... density time series is dominated by an 8-year cycle and predicts an increase in krill biomass density ...
Meeting Document : WG-EMM-03/6 : Author(s): R.P. Hewitt, D.A. Demer and J.H. Emery (USA)
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ALLOCATION OF RESEARCH HAULS IN THE EXPLORATORY FISHERIES FOR DISSOSTICHUS SPP. IN SUBAREAS 48.6 AND 58.4 IN 2008/09
was terminated early due to the closure of those SSRUs. In 9 of the 14 sets of research lines deployed ... 5841C) and Shinsei Maru No.3 (SSRU 5842A) where the setting of research lines was terminated early due ...
Meeting Document : WG-SAM-09/06 : Author(s): Secretariat
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Short report on trip 9604, American Champion, Aug/Sep 1996
Author(s): Delegation of South Africa Title: Short report on trip 9604, American Champion, Aug ... Short report on trip 9604, American Champion, Aug/Sep 1996 ...
Meeting Document : WG-FSA-96/47 : Author(s): Delegation of South Africa