Résultats de la recherche

1. Reports on abundance and biological information of toothfish in Division 58.4.4 a & b by Shinsei maru No. 3 in 2013/14 season

   information of toothfish in the research blocks 58.4.4b_1 (SSRU 58.4.4C) and 58.4.4b_2 (SSRU 58.4.4D) of ... trotline system were made in the blocks. Total catch of Dissostichus eleginoides (excluding those tagged ... and released) was 26.6 tonnes in the survey area. Mean CPUEs in terms of weight of D. eleginoides was ... 32.9 kg / km (CV = 11.3%) and 38.3 kg / km (CV = 13.6%) in the blocks 58.4.4b_1 and 58.4.4b_2 ...

   Meeting Document : WG-SAM-15/14 : Auteur(s): Delegation of Japan

2. Updated description of Patagonian toothfish (Dissostichus eleginoides) tagging and ageing programs in Division 58.5.2, 1997–2015

   . This report describes the recent fishing and data collection activities in the fishery. The fleet has ... enhance the tagging program that was established in 1998, the fleet has increased tagging rate in this ... Division from 2 tags/3 tonnes to 2 tags/tonne. Tag overlap statistics across the fleet have been ... , considerably adding to information on the structure of the population. The ageing program at AAD has produced ...

   Meeting Document : WG-FSA-15/55 : Auteur(s): D.C. Welsford, B. Farmer, T.D. Lamb, C. Péron, E. Woodcock and P.E. Ziegler (Australia)

3. Contrasting population changes in sympatric penguin species in association with climate warming

   conditions for some species. These include the congeneric Adélie, chinstrap and gentoo penguins, which now ... demonstrate remarkable population responses to regional warming. However, inconsistencies in the direction of ... population changes between species at different study sites complicate the understanding of causal processes ... . Here, we show that at the South Orkney Islands where the three species breed sympatrically, the less ...

   Meeting Document : WG-EMM-06/P3 : Auteur(s): J. Forcada, P.N. Trathan, K. Reid, E.J. Murphy and J.P. Croxall (United Kingdom)

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

   Abstract:  In marine ecosystems, characterisation of the foraging areas and habitats of predators ... is a key factor in interpreting their ecological role. We studied the foraging areas of the macaroni ... penguin Eudyptes chrysolophus at Bird Island, South Georgia, throughout the breeding seasons of 1999 to ... between different stages of the breeding season, between sexes, between years and between individuals ...

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

5. OCEANIC CIRCUMPOLAR HABITATS OF ANTARCTIC KRILL

   growth rates and predation losses are atypically high. Emphasis on these areas has led to the current ... , with 70% of the total stock concentrated between 0o and 90oW. Within this Atlantic sector, krill are ... abundant over both shelf and ocean. At the Antarctic Peninsula, by contrast, they are found mainly over the ... inner shelf whereas in the Indian-Pacific sectors krill prevail in the ocean within 200-300 km of the ...

   Meeting Document : WG-EMM-08/P04 - Abstract : Auteur(s): A. Atkinson, V. Siegel, E. A. Pakhomov, P. Rothery, V. Loeb, R.M. Ross, L.B. Quetin, K. Schmidt, P. Fretwell, E.J. Murphy, G.A. Tarling and A.H. Fleming

6. Revised reports on abundance and biological information on toothfish in Divisions 58.4.4 a and 58.4.4b by Shinsei maru No. 3 in 2011/12

   Abstract:  A survey was conducted in order to collect information for the stock status and various ... 28.3 tonnes in the survey area in 70 longline sets. Mean CPUEs of D. eleginoides was 48.3 kg / km (CV ... = 79.1%) in terms of weight. The mean CPUE in terms of weight in SSRU B (32.1 kg / km) was rather lower ... than that (50.5 kg / km) in the same SSRU in 2010/11. A total of 172 individuals of toothfish with good ...

   Meeting Document : WG-FSA-12/57 : Auteur(s): K. Taki, T. Iwami, M. Kiyota and T. Ichii (Japan)

7. Research plan for toothfish in Division 58.4.4a & b by Shinsei Maru No. 3 in 2013/14

   Division 58.4.4 a & b. Regarding SSRU C, the stock size was estimated by using following six methods; 1 ... ) CASAL_0_IUU model, and 6) CASAL_all_IUU model. This approach was made based on the WG-FSA’s recommendation ... stating that the sensitivity run of the CASAL model should be made by using levels of IUU ranging from ... zero to all observed IUU fishing, and using constant YCS (year class strength)  in SSRU C. The ...

   Meeting Document : WG-SAM-13/21 : Auteur(s): Delegation of Japan

8. Fishing for structure; can we describe normal patterns in toothfish fishing operations using catch and effort data?

   Abstract:  We describe the typical steps involved in demersal longline fishing operations for ... toothfish in CCAMLR fisheries and link those steps to the variables recorded as part of the CCAMLR catch and ... effort data reporting system. We then describe statistical properties of the recorded variables and how ... more difficult to evaluate given the wide range of influences that may affect recorded values for a ...

   Meeting Document : WG-FSA-16/36 : Auteur(s): J.M. Fenaughty and K. Large

9. Environmental response of upper trophic level predators reveals a system change in an Antarctic marine ecosystem

   Abstract:  In the Antarctic Peninsula region current, long-term changes in the physical ... increase in the frequency of years of low reproductive output. Changes in the population structure of krill ... , and its relationship with reproductive performance, suggest that the biomass of krill within the ... largest size class was sufficient to support predator demand in the 1980's but not in the 1990's ...

   Meeting Document : WG-EMM-01/21 : Auteur(s): K. Reid and J.P. Croxall (United Kingdom)

10. Revised research plan for toothfish in Division 58.4.4 b by Shinsei maru No. 3 in 2014/15

    blocks C and D using CPUE analogy method, Petersen method and CASAL model, although the data of current ... season has not been validated and not used for the present analysis. We used updated reference area size ... for the CPUE method and altered natural mortality for the Petersen and CASAL methods. Detailed results ... using CASAL models in research block C are described in a separated document. The estimated stock size ...

    Meeting Document : WG-FSA-14/21 : Auteur(s): Delegation of Japan

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