Résultats de la recherche

1. Status of the FIBEX acoustic data from the west Atlantic

   to check the consistency of krill abundance estimates derived from different survey vessels. There is ... a good level of consistency between the results from four of the vessels, Itzumi, Dr Eduardo L ... Holmberg, Odysee and Walther Herwig. While there is an error factor due to the combination of data ... collected at 50kHz (Walther Herwig survey) with data collected at 120 kHz (all other vessels), it is ...

   Meeting Document : WG-KRILL-93/31 : Auteur(s): P.N. Trathan and I. Everson (United Kingdom)

2. Preliminary analyses in support of the CEMP Review Workshop: serial correlations

   -03/24. Serial correlation in biological indices occurred in 4, 10 and 33 % of the time series at ... the time series at alpha levels of 0.05, 0.10 and 0.20 respectively. Generally, serial correlation ... Abstract:  As part of the preliminary analyses undertaken in preparation for the CEMP Review ... Workshop, the Secretariat has documented serial correlation in time series of CEMP indices. The values ...

   Meeting Document : WG-EMM-03/27 : Auteur(s): Secretariat

3. Target strength of mackerel icefish (Champsocephalus gunnari) from a scattering model

   cm, at 38 kHz. The model used computed tomography (CT) scans of fish to determine the sound speed and ... backscattered target strength (TS) of six mackerel icefish (Champsocephalus gunnari) of total length 26.8–35.0 ... density throughout the fish and simulated the complex interaction of the incident sound wave with the ... applicable to fish of length 26–35 cm. Existing in situ TS estimates are for smaller fish (16–26 cm) and ...

   Meeting Document : SG-ASAM-09/06 : Auteur(s): G. Macaulay (New Zealand)

4. Preliminary observation about the possibility of Antarctic krill escapement from a trawl net

   develop a method using LED lighting system at our laboratory for the purpose of filed observation of krill ... underwater video camera attached on the trawl net of Japanese commercial trawler Fukuei-maru (4,350.62 GT) in ... 2011. To avoid the influence of camera lighting on krill behavior, the observation was conducted during ... daytime. Few krill appeared to escape from posterior part of trawl net. When the trawl net caught dense ...

   Meeting Document : WG-EMM-12/66 : Auteur(s): K. Fujita and S. Hasegawa (Japan)

5. Results from the 1998 bottom trawl survey of Elephant Island and the lower South Shetland Islands (Subarea 48.1)

   , Chaenocephalus aceratus, Chionodraco rastrospinosus, and Lepidonotothen squamifrons. Estimates of length at ... Resources program in two major regions of the South Shetland Islands: Elephant Island and the lower South ... ogives were constructed for five species of finfish: Champsocephalus gunnari, Gobionotothen gibberifrons ... sexual maturity and length at first spawning are computed and compared with previous estimates and other ...

   Meeting Document : WG-FSA-98/15 : Auteur(s): C.D. Jones (USA), K.-H. Kock and S. Wilhelms (Germany)

6. Abundance of Antarctic fur seals in the South Shetland Islands, Antarctica, during the 1986/87 austral summer

   Abstract:  A survey of Antarctic fur seals (Arctocephalus gazella) in the South Shetland Islands ... recovery and recolonization of rookery sites following 19th Century commercial exploitation. Eleven fur ... seal pupping sites were identified, some of which had not previously been reported. The largest pupping ... sites were at Telmo Island and Cape Shirreff, Livingston Island, and at the Seal Islands, Elephant ...

   Meeting Document : WG-CEMP-90/41 : Auteur(s): J.L Bengtson, L.M. Ferm (USA), T.J. Härkönen (Sweden) and B.S. Stewart (USA)

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

   -rearing period of the breeding cycle at South Georgia. At this time the activity range of these two ... 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 ... contrast, kernel estimation reveals that the main foraging areas of these two sympatric, congeneric species ...

   Meeting Document : WG-EMM-01/67 : Auteur(s): A.G. Wood (United Kingdom), B. Naef-Daenzer (Switzerland), P.A. Prince and J.P. Croxall (United Kingdom)

8. An assessment of the mackerel icefish (Champsocephalus gunnari) off Heard Island

   gunnari) populations at Heard Island are developed from the results of four scientific surveys conducted ... conducted at the end of the 1997 fishing season would allow for a catch limit on the Heard plateau of 900 ... Abstract:  Assessments of the abundance and potential yield of mackerel icefish (Champsocephalus ... in 1990, 1992, 1993 and 1997. The assessments include estimates of all the parameters required, based ...

   Meeting Document : WG-FSA-97/29 : Auteur(s): de la Mare, W.K., Constable, A., Williams, R.

9. 2007 assessment of the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity

   updated to take account of further catch, GLM standardised CPUE and catch-at-length information that has ... 48.3 are used. The resource is estimated to be at about 37% of its average pre-exploitation level in ... Abstract:  The ASPM assessment of the Prince Edward Islands toothfish resource by Brandão and ... terms of spawning biomass. It is suggested that it would be prudent to restrict annual legal catches to ...

   Meeting Document : WG-FSA-07/34 Rev. 1 : Auteur(s): A. Brandão and D.S. Butterworth (South Africa)

10. Exchange of wandering albatrosses Diomedea exulans between the Prince Edward and Crozet Islands: implications for conservation

    Abstract:  Exchange of 61 wandering albatrosses Diomedea exulans has been recorded between the ... . Most movements of banded birds (57) have been westwards, from the Crozets to the Prince Edwards. In all ... , 18 fledglings banded at Possession Island, Crozets, have bred at Marion Island, Prince Edwards, but ... albatrosses of the two island groups form a metapopulation that ideally should be conserved as a single unit ...

    Meeting Document : WG-EMM-03/41 : Auteur(s): J. Cooper (South Africa) and H. Weimerskirch (France)

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