Resultados de la búsqueda
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Preliminary stock assessment of Patagonian toothfish (Dissostichus eleginoides) in the vicinity of Crozet islands (part of subarea 58.6)
Abstract: A preliminary assessment is undertaken to increase the knowledge of the Patagonian ... releases/recaptures data, commercial catch-at-length data and Killer whales impact. Preliminary results ... show different estimates for the initial and current biomass. A range of 55000 to 115000 tons is ... observed for B0 estimates and SSB never fall below 70% of the initial biomass considering the actual level ...
Meeting Document : WG-FSA-13/05 : Autor(es): R. Sinegre and G. Duhamel (France)
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Demographic characteristics of the Adélie penguin population of Béchervaise Island after 12 years of study
years of CEMP monitoring. A life table was constructed, and predicted rates of population growth and ... breeding success calculated. As for most long-lived seabird species, growth/decline rates of the Adélie ... penguin population at Béchervaise Island were found to be more sensitive to changes in annual survival ... rates, especially of young breeding adults, than to changes in fecundity parameters. These findings are ...
Meeting Document : WG-EMM-02/48 : Autor(es): J. Clarke, K. Kerry, A. Townsend and L. Emmerson (Australia)
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SPATIAL AND TEMPORAL VARIATION IN ATTRIBUTES OF ADELIE PENGUIN BREEDING POPULATIONS: IMPLICATIONS FOR UNCERTAINTY IN ESTIMATION OF THE ABUNDANCE OF BREEDING PENGUINS FROM ONE-OFF COUNTS
Abstract: Broad-scale surveys of penguin breeding abundance generally rely on on-off counts of ... adults, nests or chicks across several or many breeding sites, and the timing of these counts is often ... outside the control of researchers. Time series counts of Adelie penguin breeding population attributes ... with date-specific correction factors to estimate the population attempting to breed at the beginning ...
Meeting Document : WG-EMM-PSW-08/07 : Autor(es): C. Southwell, J. McKinlay, R. Pike, D. Wilson, K. Newbery and L. Emmerson (Australia)
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Results of the research fishing activities conducted by Chile in Management A of Subarea 48.3 from 2005–2008: the importance of conserving the big older fishes
fish caught, at a mean rate of approximately 1 kg per year/per individual. This result suggests that ... Abstract: This research makes a contribution to the Agenda Item 8 of the WG-FSA. (Biology ... , ecology and demography of target and by-catch species) and shows the response of the local population of ... Dissostichus eleginoides (TOP) from the Area management A (subarea 48.3), after 4 year of closure (2004 to 2008 ...
Meeting Document : WG-FSA-10/35 : Autor(es): C.A. Moreno and P. Rubilar (Chile)
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Application of the bootstrap-method in assessment of target strength regression parameters on the basis of in situ measurements
(PDFs) of fish length and target strength at 38 kHz and truncated PDFs are presented. We reveal that it ... Abstract: Target strength (TS) as a function of fish length (L) must be known to estimate fish ... characterizing the uncertainty of its parameters. We show that the bootstrap–method is a highly efficient method ... of estimating the parameters of TS-length function and emphasize that calculation results depend on ...
Meeting Document : WG-FSA-SAM-04/09 : Autor(es): P.S. Gasyukov and S.M. Kasatkina (Russia)
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Report of the 1st and the 2nd stage of research fishing conducted by Russian Federation in SSRU 882A in 2010–2012 (this is a revision of WG-SAM-12/08)
removal of approximately 280 tons (at 10% operating level) each year without negative effect to the ... Abstract: In accordance with decision of CCAMLR Scientific Committee in 2010 and in 2011 years ... Russian vessel “Chio Maru 3” (“Antei” Ltd.) has been conducted research fishing of toothfish. The primary ... objective of the works in the SSRU was estimation of toothfish`s distribution density and carrying out of ...
Meeting Document : WG-FSA-12/15 : Autor(es): E.F. Kulish and I.I. Gordeev (Russia)
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Comparison of the diet of the blue-eyed shag Phalacrocorax atriceps by the analysis of pellets and stomach contents
Abstract: A total of 45 pellets from the blue-eyed shag Phalacrocorax atriceps were collected in ... January 1994 at Duthoit Point, Nelson Island, South Shetland Islands. The analysis showed fish as the main ... prey, followed by octopods, polychaetes and gastropods. Notothenia coriiceps formed the bulk of the ... the same colony; however, they differed in importance. A daily mean of 0.7 pellets per bird was ...
Meeting Document : WG-EMM-95/79 : Autor(es): Silva, P., Coria, N., Favero, M., Casaux, R.
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Review of identity and biology of species of the family Macrouridae, from the CCAMLR fishery in the Ross Sea, Antarctica
Abstract: Samples of macrourid rattail bycatch from the toothfish fishery in sub-areas 88.1 & ... ; 88.2 in 2002 were identified by observers and returned to New Zealand for subsequent confirmation of ... geographic source of the aged sample. This confirms the preliminary age estimates from the ageing study ... NIWA data were derived from frozen-and-thawed specimens. The age and length at maturity for M. whitsoni ...
Meeting Document : WG-FSA-02/32 : Autor(es): P.M. Marriott and P. McMillan (New Zealand)
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On the possibility of practical utilisation of krill target strength TS in situ obtained on the basis of EK-500 measurements
situ at the frequency of 120 kHz as measured with echosounder EK-500 (split-beam) principle). Krill was ... Abstract: Comparative analysis of krill length distribution in the echosurvey area, obtained with ... trawl and acoustic methods is presented. Besides, the acoustic estimate of krill length composition was ... obtained on the basis of the empiric model by Greene et al. (1991) using estimates of target strength in ...
Meeting Document : WG-EMM-98/19 : Autor(es): S.M. Kasatkina (Russia)
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Summary of a three year mark-recapture experiment to estimate population size of Antarctic toothfish (Dissostichus mawsoni) in Southern Area of Statistical Subarea 48.4
the aims of providing the data required for assessments of the population structure, size, movement ... and growth of both Patagonian toothfish (Dissostichus eleginoides) and Antarctic tooth (Dissostichus ... mawsoni) in South of Statistical Subarea 48.4. This paper presents the results for D. mawsoni. Fishing ... effort within the south of Subarea 48.4 was relatively evenly spread between each participating fishing ...
Meeting Document : WG-FSA-11/31 Rev. 2 : Autor(es): R.C. Wakeford, J. Roberts and R.E. Mitchell (United Kingdom)