Resultados de la búsqueda
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Acoustic discrimination of southern ocean zooplankton
the existence of a number of horizontally extensive yet vertically discrete scattering layers in the ... upper 250 m of the water column. These layers were fished with a LonghurstHardy plankton recorder (LHPR ... ) and a multiple-opening 8 m2 rectangular mid-water trawl (RMT8). Analysis of catches suggested that ... each scattering layer was composed predominantly of a single species of either the euphausiids ...
Meeting Document : WG-EMM-97/54 : Autor(es): Watkins, J.L., Brierley, A.S., Goss, C., Ward, P.
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Modeling the growth dynamics of Antarctic krill
Abstract: A time-dependent, size-structured, bioenergetically-based model was developed to ... examine the growth dynamics of Antarctic krill, Euphausia superba. A system of coupled, ordinary ... processes included in the model were ingestion, assimilation efficiency, a baseline respiration. respiratory ... growth rates; however, winter shrinkage rates were too large. Although the use of a seasonally-varying ...
Meeting Document : WG-EMM-96/68 : Autor(es): Lascara, C.M., Hofmann, E.E.
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Swimming speed and allocation of time during the dive cycle of Antarctic fur seals
swimming speeds within individuals were between 1 and 2.5 ms-1. This represented a narrower range of speed ... descent and ascent phases of dives with a reduction in speed near the bottom of the dive, when the seals ... were assumed to be feeding on krill. Surface interval increased as a curvilinear function of dive ... predicted by a model (Houston & Carbone, Behav. Ecol., 3, 255-265) which suggested that the metabolic ...
Meeting Document : WG-EMM-95/25 : Autor(es): Bevan, R.M., Boyd, I.L., Reid, K.
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Preliminary study on the breedings of chinstrap and gentoo penguins at Barton Peninsula, King George Island
Abstract: A preliminary survey on 2 species of penguins, chinstrap and gentoo was made in the ... CCAMLR standard method. A total of 96 nests for chinstraps and 121 nests for gentoos were monitored to ... document breeding chronology and give a measure of breeding success. The nests to be monitored were ... raised successfully to the creche stage was used as a measure of breeding success. Of the whole nests ...
Meeting Document : WG-CEMP-93/23 : Autor(es): H.-C. Shin and S. Kim (Republic of Korea)
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Age determination of the Antarctic fishes Champsocephalus gunnari and Notothenia rossii from South Georgia
Abstract: Foremost in the elucidation of accurate population dynamics parameters in fish is a ... otoliths, calcified tissues which may contain a large amount of biological and ecological information about ... a fish's past history. As part of an effort to study Antarctic fish growth and population ... determined a yearly basis for these species would provide valuable management data. Author(s): R. Radtke ...
Meeting Document : SC-CAMLR-VI/BG/43 : Autor(es): R. Radtke (USA)
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Development of the VME registry
Abstract: The Secretariat has proposed a work plan and budget for the development of a VME ... , paragraph 4.251(xvi)). This registry would include a secure database for holding notification details and ... and information related to VMEs and risk areas and a selection of maps of VMEs, risk areas, and ...
Meeting Document : WG-FSA-10/07 : Autor(es): Secretariat
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Revised biological parameters for the Antarctic skates Amblyraja georgiana and Bathyraja cf. eatonii from theRoss Sea
immature. For A. georgiana, this resulted in flatter maturity ogives for observer data than lab data, and ... necessarily a good option. Logistic regressions differed significantly between the sexes for both datasets ... , but observer data suggested that females matured at a larger size than males, whereas lab data ... both data sources: 65.9 cm for lab data and 66.5 cm for observer data, suggesting a reasonable overall ...
Meeting Document : WG-FSA-10/27 : Autor(es): M.P. Francis (New Zealand)
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Diet variability and reproductive performance of macaroni penguins (Eudyptes chrysolophus) at Bird Island, South Georgia
frequency occurrence of T. gaudichaudii both increased with a decreasing proportion of E. superba in the ... or amphipods and 27 % were mixed, suggesting a sigmoidal functional response. The energy and mass of ... feed on a variety of prey types, chick growth was always severely impacted by a shortage of euphausiids ...
Meeting Document : WG-EMM-12/17 : Autor(es): C.M. Waluda, S.L. Hill, H.J. Peat and P.N. Trathan (United Kingdom)
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Revised assessment models for Patagonian toothfish in research block 58.4.3a_1 of Division 58.4.3a, Elan Bank for the years 2005–2014
fish tagged in 2012, and a catch at age model including the data with a single age length key applied ... to all years (ELAN_age model). Another run was a catch at length model as ELAN_len model except using ... released in 2012 for ELAN_len, ELAN_age and ELAN_lenOB models reflected a large number of recaptures of the ...
Meeting Document : WG-FSA-15/22 : Autor(es): K. Taki (Japan), S. Mormede (New Zealand) and T. Ichii (Japan)
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Monitoring variability and change in the plankton communities of the Scotia Sea through Continuous Plankton Recorder surveys
conditions, particularly in the location of the Polar Front. This has a strong influence on patterns of ... has been monitored through conducting a series of Continuous Plankton Recorder (CPR) tows in the South ... Atlantic Ocean since 2005. The tows were carried out as a collaboration between the British Antarctic ... successful tows. Of these, 715 samples have been analysed. A total of 245 taxa have been recorded, with ...
Meeting Document : WG-EMM-16/29 : Autor(es): G.A. Tarling, M.Z. Wootton, D.G. Johns, T.D. Jonas, E.J. Murphy and P. Ward