Résultats de la recherche

1. Setting a minimum line length for line sink rate testing: a review of existing data and some preliminary proposals for CCAMLR consideration in revising Conservation Measure 24-02 (2004)

   Abstract:  This paper provides a brief descriptive analysis of some of the available data on the ... length of longlines used in exploratory fisheries and some of the data describing longline sink rate ... trials. In Sub-area 88.1 the maximum length of longline used by auto longline system vessels is ... approximately 15 000 m. The maximum length of longline used by Spanish longline system vessels is approximately ...

   Meeting Document : WG-FSA-05/80 : Auteur(s): N. Smith (New Zealand)

2. Exploitation of mesoscale oceanographic features by grey-headed albatross Thalassarche chrysostoma in the southern Indian Ocean

   southern Indian Ocean. During incubation, most birds foraged to the north of the island, at the edges of ... . In contrast, during chick-rearing all tracked birds foraged to the southwest of the island, at the ... edges of anomalies along the South-West Indian Ridge. Previous work in this area has shown that these ... Indian Ridge. Diet samples taken during the chick-rearing period showed a predominance of fresh specimens ...

   Meeting Document : WG-FSA-01/12 : Auteur(s): D.C. Nel, J.R.E. Lutjeharms, E.A. Pakhomov, I.J. Ansorge, P.G. Ryan and N.T.W. Klages (South Africa)

3. Distribution of mackerel icefish by size-group at South Georgia

   Abstract:  The depth distribution of C. gunnari was investigated with data from 9 groundfish ... of 8 depth strata with mean depths of 112, 137, 165, 185, 208, 230, 257 and 308 m. Fish were divided ... into size groups representative of age-classes. Kruskal-Wallis tests on log-transformed median ... abundance (number of fish km?2) indicated that depth of maximum abundance increased as the size of the fish ...

   Meeting Document : WAMI-01/16 : Auteur(s): A.W. North and I. Everson (United Kingdom)

4. Trends of Antarctic fur seal population at SSSI No. 32, Livingston Island, South Shetlands, Antarctica

   , South Shetland, Antarctica. We also discuss the current reliability of the model and related population ... had to model the population at the latter site, in order to have a complete estimate of the population ... . From this, we estimated an overall increase of 17% in the total population, including in this figure a ... values of the carrying capacity of the environment (K). This might not be correct due to the restrictions ...

   Meeting Document : WG-EMM-99/16 : Auteur(s): R. Hucke-Gaete, D. Torres, A. Aguayo, J. Acevedo and V. Vallejos (Chile)

5. Quantifying habitat use in satellite-tracked pelagic seabirds: application of kernel estimation to albatross locations

   Abstract:  We develop a new approach to quantifying habitat use within the foraging ranges of ... satellite-tracked seabirds. We applied kernel estimation techniques to 167 days (3738 locations) of data ... chick rearing period of the breeding cycle at South Georgia. At this time the activity range of these ... . In contrast, kernel estimation reveals that the main foraging areas of these two sympatric ...

   Meeting Document : WG-FSA-99/19 : Auteur(s): A.G. Wood (United Kingdom), B. Naef-Daenzer (Switzerland), P.A. Prince and J.P. Croxall (United Kingdom)

6. Conservation of Antarctic pack-ice seals with increasing krill fishing and environmental change

   Abstract:  The management of Antarctic krill and conservation of its predators requires ... understanding about the compound effects of changing habitats, ecosystem interactions, and fishing practices ... . For Antarctic pack-ice seals, a main group of krill predators, we report the spatial density and krill ... declines consequent on climate change. We find that the WAP has the highest known density of pack-ice seals ...

   Meeting Document : WS-MPA-11/24 : Auteur(s): J. Forcada, P.N. Trathan (UK), P.L. Boveng (USA), I.L. Boyd (UK), D.P. Costa (USA), M. Fedak (UK), T.L. Rogers and C.J. Southwell (Australia)

7. Variation in the distribution of Antarctic krill Euphausia superba around South Georgia

   Abstract:  Between 1980 and 1997 British Antarctic Survey carried out 11 cruises in the region of ... South Georgia. Here we summarize the length-frequency distributions of krill caught on each of these ... cruises and look particularly at differences between krill taken from the eastern and western ends of the ... size 39.7 mm); cluster 2 were a mixture of year classes (mean size 37.7 mm); cluster 3 were large krill ...

   Meeting Document : WG-EMM-97/47 : Auteur(s): Daly, H.I., Murray, A.W.A., Watkins, J.L.

8. Distribution of Soviet commercial fleet at krill fishery in the South Orkneys subarea (Subarea 48.2) during 1989/90

   Abstract:  The results of analysis of haul by haul catch statistics of Soviet commercial fleet ... . Actually during the whole season fishing vessels worked in one fishing ground off the north-western edge of ... 6.9-7.1 t/hour by May-June. Stability of the fishing ground is stipulated by peculiarities of the area ... hydrodynamics, such as availability of sustained doubling current around Islands and high water disturbance ...

   Meeting Document : WG-EMM-97/50 : Auteur(s): Sushin, V.A.

9. A comparison of Antarctic krill (Euphausia superba Dana) caught by nets and taken by macaroni penguins (Eudyptes chrysolophus Brandt): evidence for selection?

   , we examined the potential selection of different length and maturity stages of Antarctic krill ... probability of obtaining length-frequency distributions of krill different from that obtained from the net ... distributions that were statistically different from the original distribution of krill caught in nets on 76 out ... of 100 trials. Nevertheless, these differences were smaller than those found between the penguin ...

   Meeting Document : WG-EMM-96/08 : Auteur(s): Croxall, J.P., Hill, H.J., Trathan, P.N., Watkins, J.L.

10. Age determination of the Antarctic fishes Champsocephalus gunnari and Notothenia rossii from South Georgia

    Abstract:  Foremost in the elucidation of accurate population dynamics parameters in fish is a ... necessity for an errorless estimation of age. Age determination can provide basic life history information ... used annual rhythmic deposition in calcified tissues as time marks but, due ts the lack of distinct ... periodicity in Antarctic hydrographic conditions, age determination of Antarctic fish has proven to be ...

    Meeting Document : SC-CAMLR-VI/BG/43 : Auteur(s): R. Radtke (USA)

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