Resultados de la búsqueda
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A brief outline of the biology of the Antarctic silverfish, Pleuragramma antarcticum Boulenger, 1902 (Nototheniidae) from the Antarctic Indian Ocean
Abstract: The Antarctic silver fish (Pleuragramma antarcticum) is one of the most numerous ... species in the outer waters of Antarctica. In the Indian sector of the Southern Ocean there are at least ... there are macro aggregations of plankton, while fish aged from 3+ to 12+ years form near-bottom, pelagic ... when they reach 13-16 cm in length and 4-6 years of age. Males reach maturity at 12-18 cm in length and ...
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 ... 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 ... second whole sagittal otolith. First October instead of the commonly accepted 1 July, was taken as the ...
Meeting Document : WG-FSA-90/09 : Autor(es): E. Barrera-Oro and R. Casaux (Argentina)
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Results of scientific observation in Antarctic krill fishery in 2010/11: I. state of observer deployment and data collection
Abstract: We analyzed the 2010/11 krill observer data to confirm the outcome of recent revisions ... of krill observation scheme. This paper summarizes the status of observer deployment, sampling ... , the coverage of krill biological sampling for hauls and the number of krill sampled for biological ... current state of data collection, mere extension of the observer coverage may not result in the ...
Meeting Document : WG-EMM-12/65 : Autor(es): M. Kiyota and T. Okuda (Japan)
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A critical re-examination of the evidence for a possible dependence of Weddell seals (Leptonychotes weddellii) on Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea, Antarctica
(Dissostichus mawsoni; ‘toothfish’) in the Ross Sea may affect the ecological viability of top predators such as ... Weddell seals (Leptonychotes weddellii), but available evidence remains inconclusive as a result of both ... the assumptions underlying application of stable isotope methodology to Weddell seals, and estimate ... the potential contribution of toothfish to the diet of Weddell seals using an isotope mixing model ...
Meeting Document : WG-EMM-13/28 : Autor(es): R. Eisert, M.H. Pinkerton (New Zealand), S.D. Newsome and O.T. Oftedal (USA)
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Towards the development of an assessment of stock abundance for Subarea 88.2 SSRUs 88.2C–G
Abstract: This paper frames a discussion for improving the assessment of toothfish abundance for ... SSRUs 88.2C–G. We initially provide a characterisation of the fishery and a summary of available tagging ... fish have been recaptured. It is likely that the lack of recaptures of tagged fish in this region has ... been caused primarily by the poor spatial overlap of released tagged fish with subsequent fishing ...
Meeting Document : WG-FSA-14/59 : Autor(es): S.M. Hanchet and S.J. Parker (New Zealand)
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Plan of research program of the Russian Federation in Subarea 48.5
Abstract: Closed mostly within the Weddell Sea Subarea 48.5 is one of the closed data-poor CCAMLR ... subareas, where stock assessment should be carried out. In spite of hard ice conditions at most part of the ... of the first and the second stage of this program. It highlights the Weddell Sea as one of the most ... promising area for exploratory fishery of Dissostichus sp. However, fishery in Subarea 48.5 is closed on the ...
Meeting Document : WG-FSA-16/15 Rev. 1 : Autor(es): Delegation of the Russian Federation
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On the very high likelihood of bycatch of ice krill (Euphausia crystallorophias) in the present-day fishery for Antarctic krill (E. superba)
, Scotland, June 2017) attended by representatives of the Association of Responsible Krill harvesting ... companies (ARK), the Marine Stewardship Council (MSC) and CCAMLR, it became apparent that no bycatch of Ice ... a condition of their fishing permits to report all bycatch. Since the present-day Antarctic krill ... fishery operates in geographic areas that overlap with the known range of Ice krill, that Ice krill and ...
Meeting Document : WG-EMM-18/05 : Autor(es): A.S. Brierley and R. Proud
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Exploration of CPUE standardisation variances in the Ross Sea (Subareas 88.1 and 88.2A South of 70°s) Antarctic toothfish (Dissostichus mawsoni) exploratory longline fishery
Abstract: Catch rates or catch per unit of effort (CPUE) are used for data-poor exploratory ... interim of collecting sufficient tag recaptures. Here, we address the two questions: (1) which unit of ... such as gear type, vessel, fishing season, month, bait, fishing depth and area affect estimates of ... trend and magnitude of catch rates. Using data from the Ross Sea Antarctic toothfish fishery, we ...
Meeting Document : WG-SAM-2019/25 : Autor(es): D. Maschette, S. Wotherspoon and P. Ziegler
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Alternative method of the age composition assessment on the basis of surveys length data using mixture distributions
Abstract: On the basis of the bottom trawl surveys carried out by Russia and Great Britain during ... bootstrap method result in different estimates of mean fish density in the length series. Verification of ... the hypothesis of non-zero observations lognormal distribution for a large number of length groups ... casts doubt on the correctness of the first method application and therefore also of the method by de la ...
Meeting Document : WG-FSA-05/78 : Autor(es): P. Gasyukov (Russia)
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PRELIMINARY REPORT OF THE NEW ZEALAND RV TANGAROA IPY-CAML SURVEY OF THE ROSS SEA REGION, ANTARCTICA IN FEBRUARY-MARCH 2008
Ross Sea region in support of the International Polar Year Census of Antarctic Marine Life (IPY-CAML ... ). The 50 day voyage on the research vessel Tangaroa involved an extensive survey of marine organisms ... from viruses to pelagic and demersal fish and cephalopods from the surface down to depths of 3500 m ... , and from the continental shelf and slope of the Ross Sea to unexplored seamounts and abyssal plains ...
Meeting Document : WG-EMM-08/18 : Autor(es): S.M. Hanchet, J. Mitchell, D. Bowden, M. Clark, J. Hall, R. O’Driscoll, M. Pinkerton and D. Robertson (New Zealand)