Resultados de la búsqueda
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Cycles of Euphausia superba recruitment evident in the diet of Pygoscelid penguins and net trawls in the South Shetland Islands, Antarctica
proportionately more females when the krill population was dominated by large adults at the end of the cycles; net ... Abstract: Size and sex of Antarctic krill taken from chinstrap and gentoo penguin diet were ... evaluate penguin diet as a sampling mechanism and to look at trends in krill populations. Both penguin diet ... sustaining the population during each cycle. Penguin diet samples contained adult krill of similar lengths to ...
Meeting Document : WG-EMM-07/P2 : Autor(es): A. Miller and W. Trivelpiece (USA)
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Assessing the feasibility of regional surveys of land-based predator abundance in the Southern Ocean: a framework for decision making and planning
abundance of land-based predators. At the 2001 meeting of WG-EMM it was proposed that a workshop be held in ... that it be applied at the workshop to a selected region as a means of both assessing and/or developing ... Abstract: In 2000 WG-EMM discussed the need for region-wide and circum-Antarctic estimates of ... 2002 to assess the feasibility of such broad-scale surveys, and a small intersessional correspondence ...
Meeting Document : WG-EMM-02/45 : Autor(es): C. Southwell (Australia)
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Proposal to continue the time series of research surveys to monitor abundance of pre-recruit Antarctic toothfish in the southern Ross Sea in 2013
Abstract: At its 2011 meeting, the Scientific Committee agreed that a time series of relative ... endorsed a proposal to carry out this work once the fishery had closed at the end of the 2011/12 season ... meeting of WG-SAM (Hanchet al. 2012). In this paper we provide a proposal to continue this time series ... . The objectives of this second survey of the time series are as follows: (i) To carry out the second of ...
Meeting Document : WG-SAM-12/28 : Autor(es): S.M. Hanchet, S. Mormede, S.J. Parker and A. Dunn (New Zealand)
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Growth rates of Antarctic fur seals as indices of environmental conditions
relationship between growth rate and mass at weaning and there were counterintuitive indications of higher ... mass at age in each year compared to the multi-year mean, that was not dependent on assumptions of ... Abstract: The growth rates of Antarctic fur seal Arctocephalus gazella pups estimated from ... weighing cross-sections of the population were compared with measured/inferred changes in the the ...
Meeting Document : WG-EMM-01/20 : Autor(es): K. Reid (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
species in the outer waters of Antarctica. In the Indian sector of the Southern Ocean there are at least ... when they reach 13-16 cm in length and 4-6 years of age. Males reach maturity at 12-18 cm in length and ... Abstract: The Antarctic silver fish (Pleuragramma antarcticum) is one of the most numerous ... there are macro aggregations of plankton, while fish aged from 3+ to 12+ years form near-bottom, pelagic ...
Meeting Document : WG-FSA-92/11 Rev. 1 : Autor(es): V.V. Gerasimchuk (Ukraine)
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Preliminary results of an age/length study of juvenile Notothenia rossii marmorata from Potter Cove, South Shetland Islands
Abstract: Whole otoliths and scales were used for a simultaneous age determination of juvenile ... Notothenia rossii marmorata specimens collected at Potter Cove, King George/25 de Mayo Island, South Shetland ... Islands. Results from the analysis of both structures agreed in 95.5%. Likewise, the examination of ... otolith cross sections of chosen specimens confirmed in all the cases the age readings obtained from the ...
Meeting Document : WG-FSA-90/09 : Autor(es): E. Barrera-Oro and R. Casaux (Argentina)
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COMPARATIVE CHARACTERISTICS OF PATAGONIAN (DISSOSTICHUS ELEGINOIDES) AND ANTARCTIC (D. MAWSONI NORMAN) TOOTHFISH INHABITING DIFFERENT SECTORS OF THE SOUTHERN OCEAN
of these parameters revealed essential differences in food spectra both at the first pelagic stage of ... their life cycle and during the period of their habitation on the shelf and continental slope. At that ... Abstract: On the basis of our own data and literature materials, the schematic posters showing ... spatial and vertical distribution of two toothfish species during their whole life cycle, changes in food ...
Meeting Document : WG-FSA-09/24 : Autor(es): K.V. Shust, I.P. Zarikhin, I.G. Istomin, A.F. Petrov, V.A. Tatarnikov and N.S. Demina (Russia)
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Summary of data collected by Japan and South Africa in Subarea 48.6 between 2013 and 2015, and other statistics available for assessment of Dissostichus spp. in Subarea 48.6.
report presented at WG-SAM-15 (WG-SAM-15/50) has not been updated for WG-FSA as neither of the vessels ... Abstract: The end of the 2014/15 season will see the completion of the third year of the multi ... undertaking the research returned to the study area over the winter. WG-SAM-15 requested that a summary of the ... such as distribution of effort, catch and tag releases and recaptures are already available in ...
Meeting Document : WG-FSA-15/66 : Autor(es): R.W. Leslie (South Africa), K. Taki, T. Ichii (Japan) and S. Somhlaba (South Africa)
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Estimation of the green weight of krill caught
revised at WG-EMM-13 and published in Conservation Measure 21-03 Annex B. Estimates of green weight and ... to directly estimate the green weight of krill caught since 2012/13. The estimation methods were ... estimation of the green weight of krill caught: codend volume, holding tank volume, flow meter, flow scale ... , plate tray and meal conversion. The submission of green weight estimates and parameter values continues ...
Meeting Document : WG-EMM-14/29 : Autor(es): Secretariat
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Length-age composition of icefish (Champsocephalus gunnari, perciformes, notothenioidei, Channichthyidae) from different locations of South Georgia Island subarea
Ch.gunnari length-age composition structure at early years of life for fish inhabiting areas to the south of ... maturing individuals as they grow. It has been defined that a part of western group of fish at the age of 2 ... have been used to study length-age composition of Champsocephalus gunnari from different locations of ... South Georgia Island Subarea. An analysis of Ch.gunnari length-age groups spatial distribution over ...
Meeting Document : WG-FSA-00/32 : Autor(es): Zh.A. Frolkina (Russia)