Resultados de la búsqueda
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Revised research plan for the 2013/14 exploratory longline fishery of Dissostichus spp. in Division 58.4.3a
in the last WG-SAM meeting. We tentatively recalculated a sample size of Dissostichus spp in each ... block in such a way that the numbers of tag recoveries in the 2016 season shows an approximately 0.3 of ... coefficient variance of biomass estimate from the bootstrapped procedure, under the condition that the ... block, in order to promote successful stock assessment. The separation rule was one of the major ...
Meeting Document : WG-FSA-13/40 : Autor(es): Delegation of Japan
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A review of by-catch in CCAMLR exploratory toothfish fisheries
Abstract: Mitigating the adverse affects of commercial fishing on the environment is an integral ... responsibility of fisheries globally. Efforts to reduce bycatch, to exploit previously unfavourable species and ... Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) is widely recognized for its ... thorough and effective management of Southern Ocean toothfish fisheries, especially in eliminating ...
Meeting Document : WG-FSA-14/16 : Autor(es): E. McClure, K. Reid (Secretariat)
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Multiyear changes in distribution and abundance of Salpa thompsoni in the Western Antarctic Peninsula region
characterized by a circumpolar distribution and its appearance is clearly associated with the occurrence of the ... Antarctic Circumpolar Current (ACC). This area of the Southern Ocean is characterized by a relatively low ... productivity and high water temperature. In recent years the expansion of distribution range of this ... invertebrate species has been observed. This process may be a result of the ACC southward movement, which is ...
Meeting Document : WG-EMM-16/75 : Autor(es): A. Panasiuk, A. Słomska, J. Wawrzynek, M. Konik and A. Weydmann
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COLLAPSE OF SOUTH AFRICA’S PENGUINS IN THE EARLY 21ST CENTURY
Abstract: The number of African penguins Spheniscus demersus breeding in South Africa collapsed ... from about 56 000 pairs in 2001 to some 21 000 pairs in 2009, a loss of 35 000 pairs (>60%) in eight ... classification of the species as Endangered. In South Africa, penguins breed in two regions, the Western Capeand ... main food is anchovy Engraulis encrasicolus and sardine Sardinops sagax, which are also the target of ...
Meeting Document : WG-EMM-11/P8 : Autor(es): R.J.M. Crawford, R. Altwegg, B.J. Barham, P.J. Barham, J.M. Durant, B.M. Dyer, D. Geldenhuys, A.B. Makhado, L. Pichegru, P.G. Ryan, L.G. Underhill, L. Upfold, J. Visagie, L.J. Waller and P.A. Whittington
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Entanglement of Antarctic fur seals (Arctocephalus gazella) in man made debris at Bird Island, South Georgia, during the 2006 winter and 2006/07 breeding season
Abstract: Results of the survey of entanglements of Antarctic fur seals at Bird Island, South ... total of 41 winter entanglements were observed in the reporting period compared to 2 observed in the ... 1992 when 97 entanglements where reported). The number of entanglements seen during the summer period ... was 17, an increase of 112.5% over the previous summer, and the highest since 2001/02. During the ...
Meeting Document : SC-CAMLR-XXVI/BG/17 : Autor(es): Delegation of the United Kingdom
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A RE-ANALYSIS AND UPDATE OF THE ANTARCTIC KRILL BIOMASS IN THE SOUTH SHETLAND ISLANDS, THROUGH 2011
Abstract: Acoustically based estimates of Antarctic krill (Euphausia superba) biomass, and net ... -based estimates of krill density and recruitment are recalculated for the years 1996 through 2011 ... . The time series of acoustic biomass indicate that krill have varied by more than an order of magnitude ... based data show that 2011 was a year of good recruitment, following two years of low recruitment. Krill ...
Meeting Document : WG-EMM-11/26 : Autor(es): A. Cossio, C. Reiss and R. Driscoll (USA)
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A characterisation of the toothfish fishery in Subareas 88.1 and 88.2 from 1997/98 to 2004/05
eight years in Subarea 88.1 and for four years in Subarea 88.2 with a large amount of data collected on ... toothfish and the associated bycatch. The 2005 D. mawsoni catch was the highest on record with a total of ... 3477 t against a catch limit of 3625 t. The catch limit was almost reached in Subarea 88.1 and exceeded ... were rattails, which contributed 12% of the catch, and skates which contributed to about 2% of the ...
Meeting Document : WG-FSA-05/29 : Autor(es): S.M. Hanchet, M.L. Stevenson, N.L. Phillips and A. Dunn (New Zealand)
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Population of macaroni penguins Eudyptes chrysolophus at Marion Island, 1994/95 to 2002/03, with information on breeding and diet
Abstract: There is indication that numbers of macaroni penguins Eudyptes chrysolophus at ... subantarctic Marion Island have decreased since the early 1980s. Estimates of the population at the island fell ... large colonies, at Bullard Beach and Kildalkey Bay, account for about 85% of the overall population. At ... mean density of nests decreased. However, error on estimates of abundance at these colonies precludes ...
Meeting Document : WG-EMM-03/15 : Autor(es): R.J.M. Crawford, J. Cooper and B.M. Dyer (South Africa)
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Exploratory analysis of acoustic data from the Ross Sea
Abstract: This report presents results from a pilot study to determine the feasibility of ... analyses focused on the subset of acoustic data collected when setting longlines so acoustic recordings ... , corresponding to 2–4 nmi. Data quality was generally good. Of the 84 line recordings, 68 were considered ... January 2003, and the occurrence of a double bottom echo caused by too high a ping rate from 23–30 January ...
Meeting Document : WG-FSA-SAM 03/9 : Autor(es): R.L. O’Driscoll and G.J. Macaulay (New Zealand)
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Ideal survey patterns: an example of using a simulated world
Abstract: This paper considers a class of survey patterns for a toothfish long lining fishery ... population? How sensitive are the results to the number of research shots used? This paper shall show the ... criteria. The shot selection criteria can be either that locations of known good quality are preferentially ... explicit Monte Carlo model and the use of such models to study these issues is considered along with their ...
Meeting Document : WG-FSA-01/75 : Autor(es): I.R. Ball and A.J. Constable (Australia)