Résultats de la recherche

1. An index of per capita recruitment

   recruitment (PCR) is proposed such that where R 1 is the proportion of age-l animals sampled in year y and M ... assumptions that: (i) post-recruit mortality does not vary over age or between years; (ii) 100% of age-l ... age-l animals in the sample can be determined unambiguously. Normal, lognormal and uniform probability ... PCR. Distributions of PCR are skewed toward higher values such that the dynamic range of PCR is ... formulation, with the understanding that the index will be negatively biased to the extent that krill delay ... to be correlated with E ( y 2 = -0.7); i.e. conditions that are associated with low mortality tend ... are skewed toward higher values such that the dynamic range of PCR is largest with high values of R1 ... can be defined as the ratio of the number of age-l animals and the number of spawners that produced ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 179–196 : Auteur(s): Hewitt, R

2. Physical forcing in the southwest Atlantic: ecosystem control

   temperature at South Georgia shows the presence of high levels of autocorrelation, with periodicity evident in ... temperature anomalies at lag periods of approximately 3 to 4 years. Crosscorrelation analyses with temperature ... anomaly data for the El Niño 4 region in the Pacific show that variability at South Georgia also reflects ... temperature fluctuations in the Pacific, with the Pacific leading South Georgia by approximately 3 years ...

   Meeting Document : WG-EMM-04/34 : Auteur(s): P.N. Trathan, E.J. Murphy, J. Forcada, J.P. Croxall, K. Reid and S.E. Thorpe (United Kingdom)

3. Alternative method of the age composition assessment on the basis of surveys length data using mixture distributions

   2000, 2002, 2004 in the South Georgia area, it is demonstrated that the method by Aitchison and ... this problem it may be proposed to apply the modern version of the method by MacDonald and Pitcher. The ... comparison of this method and the method by de la Mare for length series, estimated with Aitchison’s method ... tested on the length series obtained with the bootstrap method on the basis of the above mentioned ...

   Meeting Document : WG-FSA-05/78 : Auteur(s): P. Gasyukov (Russia)

4. FISHING INDUSTRY POLLUTION OBSERVATIONS AND ASSOCIATED MARINE MAMMAL ENTANGLEMENT RECORDS AT SOUTH GEORGIA, SUMMER 1996/97

   in ensuring that vessels fishing in the Convention Area comply with packaging band and waste disposal ... adult, six juvenile); seven (58%) were entangled with plastic packaging bands, three (25%) in trawl ... secure bait boxes; a considerable proportion of these were uncut. CCAMLR Members need to be more active ...

   Meeting Document : CCAMLR-XVI/BG/26 : Auteur(s): Delegation of the United Kingdom

5. DETECTION OF VULNERABLE MARINE ECOSYSTEMS IN THE SOUTHERN SCOTIA ARC (CCAMLR SUBAREAS 48.1 AND 48.2) THROUGH RESEARCH BOTTOM TRAWL SAMPLING AND UNDERWATER IMAGERY

   trigger level that could be used to provide a basis for notification of a VME, based on CCAMLR Scientific ... trawl samples, as well as by way of in situ observations with an underwater photographic/video imaging ... ’ vs. ‘light’ VME indicator taxa with consequences on the proposed trigger, as well as the rationale ...

   Meeting Document : WG-EMM-09/32 : Auteur(s): S.J. Lockhart and C.D. Jones (USA)

6. ADULT ANTARCTIC KRILL FEEDING AT ABYSSAL DEPTHS

   early 20th century, coupled with subsequent work with both nets and echosounders, indicated that the ... inshore. At all locations where krill were detected they were seen to be actively feeding, and at many ...

   Meeting Document : WG-EMM-08/P01 : Auteur(s): A. Clarke and P.A. Tyler

7. Using mark-recapture and catch-age data to estimate fishing and natural mortality for the Patagonian toothfish at South Georgia

   between natural and fishing mortality. The model essentially follows tagged cohorts, with the estimated ... parameters being the  fishing and natural mortality vectors for that particular cohort. The model was tested ... analysed with the model. The ages covered by the analysed cohorts ranged from 5 to 13. In the model runs ... be lower than those estimated in previous stock assessments using both mark-recapture and catch data ...

   Meeting Document : WG-FSA-SAM-06/06 : Auteur(s): R.M. Hillary and D.J. Agnew (United Kingdom)

8. Observations on the diet of Antarctic toothfish (Dissostichus mawsoni) from the Ross Sea, Antarctica (CCAMLR Statistical Subarea 88.1)

   Ross Sea was studied during the 2001 (3937 stomachs examined) and 2002 (5426 stomachs examined) summer ... fishing seasons. Fish sampled in 2001 were caught in 317-2154 m depths and ranged in length from 58–190 cm ... 62–197 cm TL. A high proportion of stomachs sampled were empty (34% in 2001 and 49% in 2002) and the ... difficult. Fish were the most important prey category (86% of stomachs in 2001 and 78% in 2002), in ...

   Meeting Document : WG-FSA-02/15 : Auteur(s): J.M. Fenaughty, D.W. Stevens and S.M. Hanchet (New Zealand)

9. Distribution of the Soviet krill fishing fleet in the South Orkneys area (Subarea 48.2) during 1989/90

   ground was observed to be stable, and it is considered that the location was determined by certain ... fishing ground off the northwestern tip of Coronation Island. CPUE showed variability with a minimum in ... hydrodynamic characteristics of the area, for example a complex current around the islands together with ... north-east of the region. The fleet was observed drifting with the current together with krill ... the fishing ground was observed to be stable, and it is considered that the location was determined ... that the fishing ground was of major importance during all months of the 1989/90 season with only a ... one fishing ground off the northwestern tip of Coronation Island. CPUE showed variability with a ... islands together with topographically-induced effects. Except in November 1989, temporally and spatially ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 51–62 : Auteur(s): Sushin, V.A

10. Results of Phase I and II of the research program for toothfish fishery in Subarea 88.3 during the 2010/11–2011/12 seasons (this is a revision of WG-SAM-12/05)

    parameters associated with productivity (SC-CCAMLR-XXX/5, par. 2.26-2.29). Toothfish's biomass was ...

    Meeting Document : WG-FSA-12/13 : Auteur(s): A.F. Petrov, V.A. Tatarnikov, K.V. Shust and I.I. Gordeev (Russia)

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