Résultats de la recherche
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Population dynamics of black-browed and grey-headed albatrosses Diomedea melanophris and D. chrysostoma at Bird Island, South Georgia
) decreased. Black-browed Albatrosses follow an annual breeding cycle, with over 80% of birds successful in ... Island, South Georgia for 17 consecutive years (1975-1991). Over this period almost all the Grey-headed ... Albatross colonies decreased, at an average rate of 1.8% per annum. Although the total Black-browed ... rearing a chick and 75% of those failing to do so returning to breed the next year, 5-10% of both ...
Meeting Document : SC-CAMLR-XII/BG/21 : Auteur(s): Delegation of United Kingdom
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Development of the krill stock in the elephant island region during the 1996/97 season
, indicating an average year for krill reprodution in this area, which is not the optimum starting point for a ... , representing age group 2+ and the year-class 1994/95 (proportional recruitment R2 = 0.85). The year-class 1995 ... Abstract: During December 1996 the Elephant Island standard grid was surveyed for krill and salps ... /96, the present juvenile age group 1 +, does not repeat the very successful recruitment of the ...
Meeting Document : WG-EMM-97/16 : Auteur(s): Siegel, V.
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Commercial fishing vessels as research vessels in the Antarctic – requirements and solutions exemplified with a new vessel
readily available for conventional coverage of harvested stocks and their ecosystems. This paper describes ... fishing and research vessel could make a large amount of important data available for both management ... , through CCAMLR, and the broader scientific community and thus improve the basis for resource evaluation ... dramatically over its 30- to 40-year history. The present annual catch in the Atlantic sector of the Southern ... low-temperature freezers (~ –80°C), will also need to be considered. Adequate working space for data ... scientific use when the vessel is new. In general, space for a 20 ft container laboratory van would be ... important factors for an efficient trawling strategy. Further, such perfor- mance is also crucial for ...
Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 11–17 : Auteur(s): Godø, O.R., C. Reiss, V. Siegel, J.L. Watkins
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Acoustic estimates of krill density at South Georgia, 1981 to 1998
from year to year over that time, ranging from ≈ 2 to ≈ 150 g m-2 (fresh mass). The 1982, 1991 and ... % confidence limits <15 g m-2). For five of the summers between 1990 and 1998 it was possible to calculate ... separate density estimates for northeastern and northwestern South Georgia, and in four of these seasons ... for an area equivalent to the western box. In three other of the years considered here data were ... years ,90' ,982 ,9i5 ,pB ,9+ ,9s6 $6' 40% ,989 ,99' ,992 ,9@ ,9qb ,9qb ,9q6 ,992 49% Year Figure 2 ... given year is less than p - o for all years, then the year in Acoustic estimates of krill density ... the year in which krill density at the island was the lowest of all years for which data are ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 47–57 : Auteur(s): Brierley, A.S., J.L. Watkins, C. Goss, M.T. Wilkinson and I. Everson
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From the Editor
approach pro- vides a biomass estimate of 37 million tonnes for the area of the southwest Atlantic ... peer-review process (and those of the editorial staff), published work may contain errors ... Science recognises that this must be done at a scientific level and provides an opportunity for both ... legal disputations, or as an instrument for personal revenge. We do not support such misuse and ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 199
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Spatial variability and power to detect regional-scale trends
Abstract: An important issue in regional-scale trend detection is the degree of concordance in ... trend between sites in relation to an average regional trend. If there is much or more variability ... precise methods of measurement and long time series of data. We used published data from repeated regional ... power for various multiple-site monitoring scenarios. Under the conservative, hypothetical scenarios we ...
Meeting Document : WG-EMM-03/47 : Auteur(s): C. Southwell and L. Emmerson (Australia)
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A descriptive analysis of the toothfish (Dissostichus spp.) tagging programme in the Ross Sea up to 2005/06
and 88.2 since 2001 is presented. The paper updates tag-release and tag-recapture data for fish that ... for non- New Zealand vessels for the first time. However, tag data were only available for all of ... these vessels for 2005 and for about half of these vessels for 2004. A reported total of 8888 Antarctic ... 20% of the recaptures could not be matched to a release observation, mainly because of missing ...
Meeting Document : WG-FSA-SAM-06/09 : Auteur(s): A. Dunn and S.M. Hanchet (New Zealand)
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Population dynamics of black-browed and grey-headed albatrosses Diomedea melanophris and D. chrysostoma at Bird Island, South Georgia
) decreased. Black-browed Albatrosses follow an annual breeding cycle, with over 80% of birds successful in ... Island, South Georgia for 17 consecutive years (1975-1991). Over this period almost all the Grey-headed ... Albatross colonies decreased, at an average rate of 1.8% per annum. Although the total Black-browed ... rearing a chick and 75% of those failing to do so returning to breed the next year, 5- 10% of both ...
Meeting Document : WG-CEMP-93/06 : Auteur(s): P.A. Prince, P. Rothery, J.P. Croxall and A.G. Wood (United Kingdom)
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Attribtuion of acoustic echoes to squid in the south Atlantic
order to characterise an acoustic signature that may be used to identify this species of squid ... is an advantage for making a positive identification of echoes. An initial review of the echocharts ... 02:lO 25 12:lO 2 0 01:30 100 02:25 130 01:45 80 00:30 20 01:55 150 01:30 60 ... (see Starr and Thorne, in press, for a review of acoustic assessments of squid). METHODS In early ... area at a depth of 25 m for 12 hours and caught an estimated 2 300 M. hyadesi (Table 2). No other ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 259–271 : Auteur(s): Goss, C., P. Rodhouse, J.L. Watkins and A.S. Brierley
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On the presence of Paralomis spinosissima and Paralomis formosa in catches taken during the Spanish survey Antártida 8611
seven hauls of the 29 made around Shag Rocks and in 20 of the 104 hauls made at South Georgia. P ... . Tows were 30 minutes in duration and the vessel speed was three knots. The trawl used for sampling ... . spinosissima was caught in seven hauls of the 29 made around Shag Rocks and in 20 of the 104 hauls made at ... ilots Shag et dans 20 des 104 traits proches de la Georgie du Sud. P. formosa a et6 p&hP a deux ... ~panee~l f i B pai io~e WXHOW T e o p r ~ a - B 20. BMA P. formosa 0 6 n a s n ~ s a n c r l AeamAbI ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 165–173 : Auteur(s): López Abellán, L.J. and E. Balguerías