Résultats de la recherche
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Towards the development of an assessment of stock abundance for Subarea 88.2 SSRUs 88.2C–G – a discussion paper
2 fish have been recaptured. It is likely that the lack of tag recaptures in this region has been ... drawing on the success of tagging programmes in other CCAMLR fisheries, we develop an approach for ... tonne in the short term to obtain more precise estimates of abundance and improved data indicative of ... Abstract: This paper frames a discussion for improving the assessment of toothfish abundance for ...
Meeting Document : WG-SAM-14/28 : Auteur(s): S.M. Hanchet and S.J. Parker (New Zealand)
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Age–length composition of mackerel icefish (Champsocephalus gunnari, Perciformes, Notothenioidei, Channichthyidae) from different parts of the South Georgia shelf
of mature fish in the west is related to the migration of maturing individuals from the eastern and ... , Notothenioidei, Channichthyidae) from different parts of the South Georgia shelf Abstract / Description ... determine the age-length composition of mackerel icefish (Champsocephalus gunnari) from different parts of ... the South Georgia area. An analysis of the spatial distribution of C. gunnari size and age groups over ... ). In the east region of South Georgia the mean length of C. ~z~i innri was generally the smallest ... census trawl surveys of C. glii~i~ari (Table 2). Mean length was smallest in the east region of the ... observed between those t ~ 7 o groups and the easterin group. The larger number of mature fish in the ... species in waters around South Georgia. A number of papers on the ecology of C. gl~nizari have been ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 133–146 : Auteur(s): Frolkina, G.A
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Manual: estimating the age of Patagonian toothfish (Dissostichus eleginoides) using transverse cross-sections of otoliths
noted in the growth parameters being used for assessments of toothfish. To assess whether these ... nations participated in a Workshop in 2001 at Old Dominion Unversity with the primary aim of seeking ... conformity in estimating age of Patagonian toothfish (Dissostichus eleginoides). Arising from the workshop ... in reading otoliths; quality assurance and control; and the use of reference sets to monitor ...
Meeting Document : WG-FSA-10/15 : Auteur(s): K. Underkoffler, N. Ramanna and J. Ashford (USA)
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Comparison of estimators of effective sample size for catch-at-age and catch-at-length data using simulated data from the Dirichlet-multinomial Distribution
Abstract: The incorporation of “effective sample size” (ESS) in integrated assessments is an ... -length frequency data relative to the other types of data used in integrated assessments of toothfish ... simulation results are used to discuss the issue of estimating ESS in the presence of process error. It is ... approximate but simple way of modelling the distribution of catch-at-age or catch-at-length frequencies using ...
Meeting Document : WG-SAM-07/7 : Auteur(s): S.G. Candy (Australia)
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Breeding biology and diet of pintado petrels Daption capense at Bouvetøya during the summer of 1996/97
was 85 %. Rates of failure were higher during the chick stage than in the egg stage for both of these ... chicks in the third study colony was similar to that recorded for other populations of Pintado Petrel, as ... . Whole female krill occurred more frequently than male krill in the diets of chick-rearing Pintado ... two study colonies. The mean hatching date in these colonies was 11 January, and the first and last ...
Meeting Document : WG-EMM-97/56 : Auteur(s): Isaksen, K., Huyser, O., Dyer, B.M., Cooper, J., Ryan, P.
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ANALYSIS OF ICE-FISH (CHAMPSOCEPHALUS GUNNARI) SPATIAL DISTRIBUTION FOR OPTIMIZATION OF THE BOTTOM TRAWL SURVEY SAMPLING
surveys in the South Georgia area are analyzed. The high heterogeneity of horizontal and vertical fish ... distribution in the near-bottom layers within the surveyed area is shown. Influence of this fish distribution ... considerable degree stipulated by heterogeneity of fish distribution in the near-bottom layer relative to the ... Abstract: Acoustic and trawl samples obtained in the near-bottom layers covered by bottom trawl ...
Meeting Document : WG-SAM-09/20 : Auteur(s): S.M. Kasatkina (Russia)
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Towards further development of stock assessment of stock abundance for Subarea 48.6 taking into account the developments since 2012 – a discussion paper
since 2012 and some review of work that could offer lessons in how to advance stock assessment in ... Subarea 48.6 in 2019. Author(s): Delegations of Japan and South Africa Title: Towards further ... development of stock assessment of stock abundance for Subarea 48.6 taking into account the developments since ... Abstract: This paper outlines stock assessment related work that has been done in Subarea 48.6 ...
Meeting Document : WG-FSA-18/66 : Auteur(s): Delegations of Japan and South Africa
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2007 krill biomass update of the South Shetland and Elephant Island regions of Area 48
Abstract: Antarctic krill biomass trends in the South Shetland Island region of Area 48 are ... 2007), acoustic biomass estimates previously presented at the 2006 WG-EMM meeting in Namibia (WG-EMM-06 ... /32). In 2007, biomass in the South Shetland Islands region exceeded 19 million tons. This increase ... from Author(s): C.S. Reiss and A.M. Cossio (USA) Title: 2007 krill biomass update of the South ...
Meeting Document : WG-EMM-07/31 : Auteur(s): C.S. Reiss and A.M. Cossio (USA)
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Utilising data from ecosystem monitoring for managing fisheries: development of statistical summaries of indices arising from the CCAMLR Ecosystem Monitoring Program
appeared in the data. An alternative procedure, using estimates of the mean and variance of baseline time ... correlated (>0.6). Criteria for inclusion of parameters in the indices are discussed when parameters are ... statistical procedure adopted by WG-EMM in 1996 for identifying anomalies in CEMP parameters. The power of the ... statistical summaries of indices arising from the CCAMLR Ecosystem Monitoring Program Abstract / Description ... values have appeared in the data. An alternative procedure, using estimates of the mean and variance of ... systematic shift in mean level. A randomisation procedure could be tested for the identification of drift ... correlated (>0.6). Criteria for inclusion of parameters in the indices are discussed when parameters are ... statistical procedure adopted by WG-EMM in 1996 for identifying anomalies in CEMP parameters. The power of ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 101–117 : Auteur(s): de la Mare, W.K. and A.J. Constable
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Problems of population age structure determination of Euphausia superba Dana using an example from the Antarctic Peninsula area and adjacent waters
examines the size structure of populations of E. superba in relation to their habitat, on the basis of an ... analysis of data collected by the author during the 1981 season in the region of the Antarctic Peninsula ... similar conditions. Hypotheses are formulated regarding the age and growth of E. superba; in addition ... , data are cited on the growth rates of krill in relation to feeding conditions, temperature factors and ... populations of E. superba in relation to their habitat, on the basis of an analysis of data collected by the ... author during the 1981 season in the region of the Antarctic Peninsula and the South Shetland Islands ... . Hypotheses are formulated regarding the age and growth of E. superba; in addition, data are cited on the ... in the size composition of krill, modelling of growth under various conditions and physiological and ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 227-270 : Auteur(s): Spiridonov, V.A.