Résultats de la recherche

1. Factors that may influence the accuracy of abundance estimates from CCAMLR tag-recapture programs for Dissostichus spp. and best practice for addressing bias

   features in common with the simplest form of an abundance estimator, known as the Lincoln- Petersen ... with respect to M, R and C. Where these assumptions are not met, parameter estimates may be biased ... the true N by the estimate N̂ (i.e. N̂ N> or N̂ N< ), with potential consequences for any ... management advice based on these estimates. To assist with assessing the impact of bias in estimating ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 63–72 : Auteur(s): Welsford, D.C. and P.E. Ziegler

2. The Patagonian toothfish (Dissostichus eleginoides) fishery in the Kerguelen Islands (Indian Ocean sector of the Southern Ocean)

   eleginoides) have been fished in the Kerguelen Islands zone for 20 years, firstly with trawlers and more ... recently with longliners. This is the oldest fishery targeting D. eleginoides in the Indian Ocean sector of ... the Kerguelen Islands zone for 20 years, firstly with trawlers and more recently with longliners ... maturity stages during the year was studied to determine the spawning period. Mature animals (stages 3 to ... ratio decreases with the years, which shows that the average size of the fish caught is smaller ... occur later in the year, aggregate on the slope of a bank beyond the shelf (Shag Rocks bank) also in ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 1–25 : Auteur(s): Lord, C., G. Duhamel and P. Pruvost

3. AGE AND GROWTH OF SPINY ICEFISH, CHAENODRACO WILSONI REGAN, 1914, OFF JOINVILLE-D'URVILLE ISLANDS (ANTARCTIC PENINSULA)

   consisted mainly of adult specimens between 1 and 3 years of age, with very few older fish. Author(s):  M ... . Age at sexual maturity was estimated to be about 2 years for females and 2.5 years for males. Compared ...

   Meeting Document : WG-FSA-08/33 : Auteur(s): M. La Mesa, A. De Felice (Italy), C.D. Jones (USA) and K.-H. Kock (Germany)

4. An alternative method for estimating the level of illegal fishing using simulated scaling methods on detected effort

   is less than, or equal to, the precautionary assessment with some given level of confidence (for ... estimating the level of illegal fi shing Figure 3: Ten illegal fi shing cruises with different levels of ... precautionary assessment with some given level of confi dence (for example 80%). Résumé Le présent document ... modelling framework of this paper, particularly with regard to the behaviour of vessels when detected ... observation of illegal fi shing effort coupled with the pattern of fi shery patrols is the main input data ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 143–161 : Auteur(s): Ball, I

5. Standardised estimates of D. eleginoides catches per effort in Subarea 48.3 using information for 1985/86–1990/91 seasons

   summer months off the eastern South Georgia and at Shag Rocks. The length frequency modes amounted to 95 ... -100 cm, which exceeded modes for the latest years of fishery. Using the generalized additive model the ...

   Meeting Document : WG-FSA-00/33 : Auteur(s): P. Gasiukov (Russia) and V. Bibik (Ukraine)

6. Food and feeding of two Channichthyids, Champsocephalus gunnari and Chaenocephalus aceratus, around Elephant Island and in the South Shetland Islands (Subarea 48.1) in 2001 and 2002

   cruise in March 2001 with RV ‘Yuzhmorgeologiya’ and ANTXIX/3 in January – February 2002 with RV ... ‘Polarstern’. C. gunnari fed almost exclusively on krill (Euphausia superba) in both years. C. aceratus fed on ...

   Meeting Document : WG-FSA-02/73 Rev. 1 : Auteur(s): H. Flores, K.-H. Kock, S. Wilhelms (Germany) and C.D. Jones (USA)

7. Seasonal and interannual variation in foraging range and habitat of macaroni penguins Eudyptes chrysolophus at South Georgia

   Georgia over the continental shelf. Foraging trip characteristics differed between males and females ... important in determining variation in foraging range and characteristics in macaroni penguins, but year and ... between different stages of the breeding season, between sexes, between years and between individuals ... differences in some parameters varied between years. The bearings of chick-rearing foraging trips were non ...

   Meeting Document : WG-EMM-02/21 Text : Auteur(s): K.E. Barlow and J.P. Croxall (United Kingdom)

8. Seasonal and interannual variation in foraging range and habitat of macaroni penguins at South Georgia

   over the continental shelf. Foraging trip characteristics differed between males and females during ... variation in foraging range and characteristics in macaroni penguins, but year and individual effects were ... the breeding season, between sexes, between years and between individuals. During incubation, on ... some parameters varied between years. The bearings of chick-rearing foraging trips were non-random and ...

   Meeting Document : WG-EMM-01/19 : Auteur(s): K.E. Barlow and J.P. Croxall (United Kingdom)

9. Changes observed in krill length frequency distribution during repeated sampling on the South Georgia shelf in 2000 January–February

   Circumpolar Current Waters from the West; Western krill belongs to cluster 2 and Eastern one to cluster 1 ... on 22 February and 3 February correspondingly. The comparative analysis revealed the strong ...

   Meeting Document : WG-EMM-01/40 : Auteur(s): V.A. Sushin and F.F. Litvinov (Russia)

10. Toothfish and skate tagging methods

    sheet to record data • Accuracy is critical (tag code and length). • Check data with observer ... records per shift. – Tag release sheets checked with tag codes used. – Notify observer of all ... distribution of captured fish; • and accomplish this with HIGH SURVIVAL of tagged fish. These are ... enough for skates too. • Pre-loaded tagging gun with sharp needle • Tag release sheet • Pencil ...

    Document : Site Section: Science

Pages