Résultats de la recherche

1. Note on estimating krill abundance from acoustic data on individual aggregations

   Abstract / Description:  The fundamental equations and assumptions underlying estimation of krill abundance ... differences of the two approaches are highlighted. It is concluded that the echo-integration approach is ... superior for the estimation of regional krill abundance and its variance since it is easier to apply ... Paper Title:  Note on estimating krill abundance from acoustic data on individual aggregations ... equations and assumptions underlying estimation of krill abundance using echo-integration information and ... aggregation parameters are briefly described. The chief differences of the two approaches are highlighted ... . It is concluded that the echo-integration approach is superior for the estimation of regional kriU ... (WG-Krill) emphasised the importance of acoustic techniques in the determination of krill abundance ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 219–223 : Auteur(s): Hampton, I. and D.G.M. Miller

2. Krill caught by predators and nets revisited: interpreting prey selection in proper temporal–spatial scales

   and predator diet sampling. Comparisons of these two methods show broadly coherent results but also ... frequently show differences that have fueled speculation of prey selectivity by predators. Krill, however ... , are not homogenously distributed and matching temporal-spatial scales of sample collections can be ... compare krill length frequency data collected over the entire West area of the U.S. AMLR survey grid with ...

   Meeting Document : WG-EMM-04/49 : Auteur(s): M.E. Goebel, V. Loeb, D.P. Costa, S.N. Sexton, A.R. Banks, J.D. Lipsky and A.C. Allen (USA)

3. Antarctic fur seal predator performance indices for the South Shetland Islands 1987/88–2002/03

   (female foraging trip duration) and C2b (pup growth rates). Measures of female foraging trip duration, pup ... ), pup growth rates (3), pup mortality, timing of reproduction, adult female survival and natality ... foraging trip durations (7.09d ±0.19), below average frequency of krill in fur seal diet (79.6% ±7.7 ... survival (85.8%) and natality (74.3%) all indicated that 2002/03 was a season of poor reproductive ...

   Meeting Document : WG-EMM-03/54 : Auteur(s): M.E. Goebel (USA)

4. Longline fishing at Tristan da Cunha: impact on seabirds

   accompanied all three licensed demersal cruises. Despite attracting considerable numbers of birds and setting ... bycatch rate of >1 bird killed per 1000 hooks; this could be even higher in summer when more birds are ... of observers on board. The gravest threat posed by longline fishing to Tristan’s seabirds comes from ... basic mitigation measures. There is a pressing need for better policing of Tristan’s waters. Author(s ...

   Meeting Document : WG-FSA-00/13 : Auteur(s): N. Glass, I. Lavarello, J.P. Glass and P.G. Ryan (South Africa)

5. Tests for anomalous years in the CCAMLR index series (draft)

   Abstract:  The properties of a method for detecting anomalous years in CCAMLR index series are ... obtained on the assumption that the series being considered consists of random values from a constant ... from a wide range of distributions. Some examples are given to illustrate the performance of the ...

   Meeting Document : WG-EMM-Stats-97/06 : Auteur(s): MacKenzie, D., Manly, B.F.

6. Finfish research proposals for Subarea 48.6 and Divisions 58.5.2; 58.4.3a by Koryo Maru 11 for 2012/13

   has contributed to the scientific rationale for ecosystem management in a large area of the Southern ... Islands that acknowledges the objectives of the Commission for the responsible management of Antarctic ... Area in 1996 and has completed a total of 47 trips to date.  Regions fished include Statistical Subarea ...

   Meeting Document : WG-SAM-12/21 : Auteur(s): R. Ball (South Africa)

7. A perspective on steepness, reference points, and stock assessment

   analytical results of the production model. We discuss what it means to set steepness equal to 1 and how to ... construct a prior for steepness. Ways out of the difficult situation raised by fixing steepness and life ... being more explicit about the information content of the data and what that means for policy makers. We ... discuss the strengths and limitations of each approach. Author(s):  M. Mangel, A.D. MacCall, J. Brodziak ...

   Meeting Document : WG-FSA-14/P05 : Auteur(s): M. Mangel, A.D. MacCall, J. Brodziak, E.J. Dick, R.E. Forrest, R. Pourzand and S. Ralston

8. Research plan for exploratory fishing for toothfish (Dissostichus spp.) in 2016/17 in Division 58.4.1 by France

   seabed analogy. In the absence of an assessment using the CCAMLR decision rules, the catch limit should ... remain unchanged at 660 tonnes for 2016/17 to maximize the expectation of tag-recapture and the approach ... of allocation and collaboration between Members should be maintained. Author(s):  Delegation of ... decision rules. This paper presents a proposal for a research plan for 2016/2017 developed under ...

   Meeting Document : WG-SAM-16/01 : Auteur(s): Delegation of France

9. Progress by WG-EMM-STAPP in estimating krill consumption by air-breathing predators within CCAMLR areas

   consumption by pack-ice seals and penguins since the last update in 2011. Estimates of pack-ice seal abundance ... krill-consuming seal species, has been estimated in Areas 48 and 58. Large-scale estimates of breeding ... penguin abundance are now available for Areas 48, 88 and 58, and a large-scale estimate of non-breeder ... estimates of krill consumption by penguins to be developed in all Areas in the near future. Work to ...

   Meeting Document : WG-EMM-16/68 : Auteur(s): C. Southwell and P. Trathan

10. Describing krill: swarms or integration intervals?

    , rather than the current integration grid approach, may facilitate the semi-automated processing of ... variance estimates for conventional grid-based swarm-based krill density.  The processing time of the swarm ... -based appraoch was half that of the standard grid-based technique. Whilst additional test data sets are ... required, the techniques presented here can be used to further explore the efficacy of swarm-based analysis ...

    Meeting Document : SG-ASAM-17/02 : Auteur(s): M.J. Cox

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