Resultados de la búsqueda
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A characterisation of the toothfish fishery in Subarea 48.6 from 2003/04 to 2011/12
) in CCAMLR subarea 48.6 (South East Atlantic). This report summarises the catch, effort, timing, depth ... species caught in the fishery over the period 2003-4 to 2011-12 are also presented.. For the Antarctic ... was reported exclusively in the SSRUs 48.6A and 48.6G. Most of the catches were reported by vessels ... %). Unstandardized raw catch and effort data suggested that the median catch per unit of effort in Antarctic ...
Meeting Document : WG-FSA-12/38 : Autor(es): R. Wiff (Chile), M. Belchier (United Kingdom), J.C. Quiroz and J. Arata (Chile)
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Assessment models for Patagonian toothfish in Division 58.4.4, SRU C on Ob and Lena Banks for the years 1989/90 to 2012/13
eleginoides in SSRUs C in Division 58.4.4 a & b (WG-SAM-13/21) following several advices during the last ... WG-SAM meeting as follows: 1)I included 2012 tag data (which was not used for model runs in WG-SAM-13 ... Japanese trotline system showed the captures of an adequate number of single-hooked fish in a state ... . The base model assumed the constant year class strength (YCS) and no IUU fishing occurrence in SSRU C ...
Meeting Document : WG-FSA-13/35 : Autor(es): K. Taki (Japan)
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Population identity, site-fidelity, movement ranges and preliminary estimates of abundance of southern right whales in the Antarctic Indian sector inferred from genetic markers
identity as well the individual identity of southern right whales distributed in summer in the Antarctic ... abundance based on ‘mark-recapture’ methods in the Antarctic Indian sector (i.e., between 80°-135°E and ... south of 60°S). In total, 157 biopsy samples were collected as skin biopsies from free-ranging whales ... the presence of a Y-chromosome specific locus. The mtDNA analysis suggested that whales in the ...
Meeting Document : WG-EMM-18/18 : Autor(es): L.A Pastene, M. Goto, P. Acuña, M. Taguchi, T. Hakamada and K. Matsuoka
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The effects of global climate variability in pup production of Antarctic fur seals
range in scale from those that impact individuals to those that impact the entire food web. Climate ... -induced changes in the abundance of species in lower trophic levels can cascade up to apex predators by ... remain largely unexplored. We investigated the delectability, limits, and nonlinearity of changes in ... Antarctic fur seal pup production at South Georgia over a 20-year period in response to environmental ...
Meeting Document : WG-EMM-06/P2 : Autor(es): J. Forcada, P.N. Trathan, K. Reid and E.J. Murphy (United Kingdom)
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A revised estimate of short-term yield for the mackerel icefish (Champsocephalus gunnari) off Heard Island based on a trawl survey in 1998
Abstract: A random stratified trawl survey of Mackerel icefish in 2 populations (Plateau and ... Shell Bank) in the vicinity of Heard Island enabled a revised estimate of yield for the coming 2 seasons ... in 1999 and 2000. While the abundances of icefish are lower in 1998 than in 1997, the Age 3 and Age 4 ... tonnes for 2000. These figures may need to be re-evaluated in light of known catches in the 1998 season ...
Meeting Document : WG-FSA-98/54 : Autor(es): A. Constable and D. Williams (Australia)
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Results from the random stratified trawl surveys to estimate distribution and abundance of Dissostichus eleginoides and Champsocephalus gunnari in the Heard Island region (Division 58.5.2) for 2010 and 2011
Abstract: Random stratified trawl surveys were completed in September 2010 and in March to May ... 2011 on the RV Southern Champion, adding to the time series of annual surveys in Division 58.5.2 that ... commenced in 1997. An earlier survey in April 2010 was not completed, but valid hauls from this, as well as ... the September 2010 survey were used in the stock assessment as they provided valuable additional ...
Meeting Document : WG-FSA-11/23 : Autor(es): G.B. Nowara, S.G. Candy and T. Lamb (Australia)
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The integrated Antarctic expedition of the YugNIRO in the season of 1989–1990: main results of the ichthyological studies
Abstract: From the field material collected on the YugNIRO integrated expedition in the Indian ... Ocean sector of the Antarctic in the season of 1989-1990, information is presented in this paper on ... taken on the shelf of Antarctica, at Ob and Lena Seamounts (referred to as Banks in the Russian usage ... ), and in the zone of the Southern Polar front. In the shelf area, of Cooperation Sea, localities of ...
Meeting Document : WG-FSA-90/39 : Autor(es): A.K. Zaitsev, V.G. Prutko and V.N. Yakovlev (YugNIRO, USSR)
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An investigation of integrated stock assessment methods for the Patagonian toothfish (Dissostichus eleginoides) in Division 58.5.2 using CASAL
Abstract: This paper follows preliminary work in 2005 in developing an integrated assessment for ... Patagonian toothfish in Division 58.5.2. It focuses on developing a “base-case” assessment, which is ... primarily based on the 2005 assessment implemented in the Generalised Yield Model (GYM) using survey data of ... show that an integrated assessment for Dissostichus eleginoides in Division 58.5.2 seems tractable. The ...
Meeting Document : WG-FSA-SAM-06/14 : Autor(es): A. Constable, S. Candy and I. Ball (Australia)
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RECENT TRENDS IN NUMBERS OF FOUR SPECIES OF PENGUINS AT THE PRINCE EDWARD ISLANDS
and southern rockhopper penguin E. chrysocome. In December 2008 it was estimated that some 65 000 ... pairs of king penguins were incubating eggs at Marion Island, the larger of the two islands in the group ... in numbers of king penguin chicks that survived to the end of the winter period, but there was ... considerable fluctuation in chick production in the 1990s. It was roughly estimated that on average 88% of king ...
Meeting Document : WG-EMM-10/P1 : Autor(es): R.J.M. Crawford, P.A. Whittington, L. Upfold, P.G. Ryan, S.L. Petersen, B.M. Dyer and J. Cooper
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Oxygen and carbon stable isotopes in otoliths record spatial isolation of Patagonian toothfish (Dissostichus eleginoides)
Abstract: Strong contrasts in ambient isotope ratios and in diet suggest stable isotopes in the ... distinguish South American-caught fish from those taken in the Antarctic. Values of δ18O and δ13C predicted ... prior evidence of population isolation. Values of δ18O in the otoliths reflected ambient values as well ... as seawater temperature: low values in Patagonian Shelf fish were consistent with exposure to ...
Meeting Document : WG-FSA-08/P03 : Autor(es): J.R. Ashford and C.M. Jones