Résultats de la recherche

1. Using ecosystem monitoring data to detect impacts

   impacted by activities such as fishing. This paper discusses a range of methods for inferring such impacts ... point. The second approach allows inference criteria based on changes in this frequency rather than by ... indicate the state of ecosystems and whether they have been impacted by activities such as fishing. This ... inference criteria based on changes in this frequency rather than by reference to a critical probability ... assessed by reference to a control population. Developing man- agement strategies that use uncontrolled ... ongoing chal- lenges faced by CCAMLR is to develop a manage- ment strategy for the krill fishery which ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 197–212 : Auteur(s): Hill, S.L., J. Forcada, P.N. Trathan and C.M. Waluda

2. Biological characteristics of Antarctic fish stocks in the southern Scotia Arc region

   catches. The only scientific surveys of these stocks during these years were conducted by Germany in 1985 ... , and by Spain in 1987 and 1991. More recently, the US Antarctic Marine Living Resources (US AMLR ... Antarctic or peri-Antarctic species predominated in the fish fauna. Species groups differed by up to 55-60 ... sample these catches. The only scientific surveys of these stocks during these years were conducted by ... Germany in 1985, and by Spain in 1987 and 1991. More recently, the US Antarctic Marine Living Resources ... differed by up to 55-60% from one shelf area to the other, mostly due to differences in the abundance of ... Kock et al. INTRODUCTION Antarctic waters have been commercially exploited by trawl fishing since ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 1–41 : Auteur(s): Kock, K.-H., C.D. Jones and S. Wilhelms

3. Areal and seasonal extent of sea-ice cover off the northwestern side of the Antarctic Peninsula: 1979 to 1996

   with features described by Stammerjohn and Smith (1996) for ice cover in the Bellingshausen Sea ... . Periods of extensive winter ice cover peaked in 1980, 1986, 1991and 1995 and were foreshadowed by the late ... years is apparent and is consistent with features described by Stammerjohn and Smith (1996) for ice ... 1995 and were foreshadowed by the late retreat of ice during the springs of 1985, 1990 and 1994. Ice ... ; Fraser and Trivelpiece, 1996; Loeb et al., in press) . These suggestions followed comments by many ... produced by the US Navy-NOAA Joint Ice Center (JIC), and surface air temperatures to infer sea-ice cover ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 65–73 : Auteur(s): Hewitt, R

4. Significant conservation benefits obtained from the use of a new fishing gear in the Chilean Patagonian toothfish fishery

   practically eliminated depredation of fish by killer whales (Orcinus orca) and sperm whales (Physeter ... macrocephalus). The performance of this fishing technique with regard to seabird mortality and depredation by ... by killer whales (Orcinus orca) and sperm whales (Physeter macrocephalus). The performance of this ... to seabird mortality and depredation by sperm and killer whales on fish catch rate was assessed ... , observers have estimated toothfish losses due to predation by killer whales to be as high as 50% (Tilney ... ., 1996). This prob- lem has been solved in part by the use of mitigation measures, such as streamer ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 79–91 : Auteur(s): Moreno, C.A., R. Castro, L.J. Mújica and P. Reyes

5. Precautionary spatial protection to facilitate the scientific study of habitats and communities under ice shelves in the context of recent, rapid, regional climate change

   both ecological processes and in community structure. Habitats revealed by collapsed ice shelves ... one of the recommendations made by the Antarctic Treaty Meeting of Experts in 2010. File:  Trathan et ... such changes, primarily in the absence of any effects caused by other human activities. In this ... changes in both ecological processes and in community structure. Habitats revealed by collapsed ice ... would fulfil one of the recommendations made by the Antarctic Treaty Meeting of Experts in 2010 ... air being brought over the peninsula by the stronger westerlies forced by changes in the Southern ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 139–151 : Auteur(s): Trathan, P.N., S.M. Grant, V. Siegel and K.-H. Kock

6. Trends in relative abundance of fjord Notothenia rossii, Gobionotothen gibberifrons and Notothenia coriiceps at Potter Cove, South Shetland Islands, after commercial fishing in the area

   results are supported by our knowledge about the diet of the piscivorous Antarctic shag (Phalacrocorax ... by the offshore commercial fishery in the area in the late 1970s. This interpretation is consistent ... relative abundance of this species and G. gibberifrons are well below those found in the early 1980s. These ... . gibberifvons are well below those found in the early 1980s. These results are supported by our knowledge about ... . rossii and G. gibberifions over the last 16 years was most probably caused by the offshore commercial ... ), conservation measures have been adopted in order to assist the recovery of these species by banning directed ... fisheries and establishing stringent by-catch limits. Commercial fishing in the South Shetland Islands ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 43–52 : Auteur(s): Barrera-Oro, E.R., E.R. Marschoff and R.J. Casaux

7. Distribution and population structure of Dissostichus eleginoides and D. mawsoni on BANZARE Bank (CCAMLR Division 58.4.3b), Indian Ocean.

   investigated using biological data collected by a Japanese commercial fishing vessel during the austral summer ... two species by depth may be related to physical intolerance to cooler temperatures because of the lack ... investigated using biological data collected by a Japanese commercial fishing vessel during the austral summer ... of the two species by depth may be related to physical intolerance to cooler temperatures because of ... sexual maturity of these two species of toothfish on BANZARE Bank, using biological data collected by a ... the seafloor at depths ranging from 630 to 1 960 m. Haul-by-haul catch and effort data and biologi ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 145–153 : Auteur(s): Taki, K., M. Kiyota, T. Ichii and T. Iwami

8. Potential impacts of bottom trawling on benthic communities in Prydz Bay, Antarctica

   demersal finfish species in Prydz Bay by Australia in the 1990/91 season. The data collected are used to ... demonstrate that the biomass of benthos that could be disturbed by commercial bottom trawling could be high in ... data on benthos retrieved in bottom trawls during a survey of demersal finfish species in Prydz Bay by ... benthos that could be disturbed by commercial bottom trawling could be high in Prydz Bay. Also, the ... finfish species in Prydz Bay by Australia in the 1990/91 season. The results are used to examine the ... the bottom bridle was 10 m. Disturbance of the benthos was caused by the bobbin gear, bridle and ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 403–410 : Auteur(s): Constable, A.J.

9. Seabird interactions with longlining operations for Dissostichus eleginoides around South Georgia, April to May 1994

   , and was affected by behavioural interactions between birds. Setting only at night would dramatically ... , intense feeding activity by seabirds, or when incorrectly constructed. File:  08ashford-etal.pdf ... of day, and was affected by behavioural interactions between birds. Setting only at night would ... weather, intense feeding activity by seabirds, or when incorrectly constructed. Une evaluation des ... measures. Within the area covered by the Convention for the Conservation of Antarctic Marine Living ... of seabirds were required to be part of the research plan to be submitted by each Member operating ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 111–121 : Auteur(s): Ashford, J.R., J.P. Croxall, P.S. Rubilar and C.A. Moreno

10. Fish distribution and biomass in the Heard Island zone (Division 58.5.2)

    nowhere very abundant, although the total biomass is relatively high by virtue of the large area it ... surveys, but this had disappeared by the third survey. Rays were widespread and moderately abundant in ... species were found to be abundant. There were two consistent areas of aggregation of Champsocephalus ... than the 7 451 + 3 383 tonnes found in May to July 1987 by Gerasimchook et al. (1988). While ... , although the total biomass is relatively high by virtue of the large area it occupies. There was one ... disappeared by the third survey. Rays were widespread and moderately abundant in waters shallower than 300 m ... eleginoides have been taken o n the plateau since the early 1970s by Soviet, French and Ukrainian vessels ...

    Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 1–20 : Auteur(s): Williams, R. and W.K. de la Mare

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