Résultats de la recherche

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

   macrocephalus). The performance of this fishing technique with regard to seabird mortality and depredation by ... then compared with similar data obtained in 2002 in the same fleet in the same fishing grounds prior to ... depre- dation with ‘almost the entire catch’ lost from some lines. Off Chile, sperm whales have been ... . 2006. Year-round distribution of white-chinned petrels from South Georgia: rela- tionships with ... catch damage was two-fold less with the use of the new system (Figure 3). One important observation ... % to less than 1.5%, with an average of 3%. This is certainly an underestimation of the predation ...

   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

2. Estimates of circumpolar abundance of Antarctic krill based on recent acoustic density measurements

   correct, with values of between 7 and 18 million tonnes per year. Given the way in which the ... -134.5 42.6 19.6 8 3 6 2 7 131 Time of Year February-March (1996) January-February (1981 ... Discovery Reports provide information on krill over much of its range (Marr, 1962; Mackintosh, 1973), and ... distribution maps produced in the Discovery Reports (Marr, 1962; Mackintosh, 1973) support modern ideas of ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 87–99 : Auteur(s): Nicol, S., A.J. Constable and T. Pauly

3. Note on estimating krill abundance from acoustic data on individual aggregations

   abundance has been echo-integration (cf. Forbes and Nakken, 1972; Johannesson and Mitson, 1983; Maclennan ... A the area surveyed. The problem with this estimator is that neither BAg nor SAg, nor their ... : 19 pp. FORBES, S.T. and O. NAKKEN (Eds). 1972. Manual on methods for fisheries resource survey and ... appraisal. Part 2. The use of acoustic instruments for fish detection and abundance estimation. FAO Man ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 219–223 : Auteur(s): Hampton, I. and D.G.M. Miller

4. Options for allocating the precautionary catch limit of krill among small-scale management units in the Scotia Sea

   monitoring conducted just prior to, or early in, the fishing season. For the purposes of illustration and ... fishery would be restricted in some of its traditional fishing grounds during years of low krill ... with permission from the data collectors. South Georgia South Shetland Islands Year Krill (g m–2 ... is a dynamic allocation based on land-based predator monitoring conducted just prior to, or early in ... small-scale man- agement units (SSMUs). The Commission further directed the Scientifi c Committee to ... early in the fi shing season. The SSMUs adopted for Subareas 48.1, 48.2 and 48.3 are described in ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 81–97 : Auteur(s): Hewitt, R.P., G. Watters, P.N. Trathan, J.P. Croxall, M.E. Goebel, D. Ramm, K. Reid, W.Z. Trivelpiece and J.L. Watkins

5. Improving estimates of Adélie penguin breeding population size: developing factors to adjust one-off population counts for availability bias

   point one week after the peak in egg laying, consistent with Standard Method A3 of the CCAMLR Ecosystem ... -October, with adult numbers reaching a peak in early November (Figure 1). Many of these penguins form ... reference point one week after the peak in egg laying, consistent with Standard Method A3 of the CCAMLR ... adjust counts of penguins at their breeding sites with date- or stage-specific factors is related to ... ), the remoteness of breeding sites, and dif- ficulty accessing them at predictable times of the year ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 229–241 : Auteur(s): Southwell, C., J. McKinlay, L. Emmerson, R. Trebilco and K. Newbery

6. Diet of the Antarctic toothfish (Dissostichus mawsoni) from the Ross Sea, Antarctica (Subarea 88.1)

   bottom longline in the Ross Sea during the 2001 and 2002 fishing seasons was analysed (3 937 and 5 426 ... (Permitin and Tarverdiyeva, 1972; Tar- verdiyeva, 1972; Zhivov and Krivoruchko, 1990; McKenna, 1991; García ... . mawsoni from the Ross Sea over the 2001 and 2002 summer fi shing seasons, with the aim of increasing our ... 2001 and 815–1 623 m in 2002, using Mustad autoline hooks baited with arrow squid (Notodarus spp ... . RESULTS During the 2001 fi shing season, heavy sea-ice in many areas focused early-season exploratory ...

   Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 113–123 : Auteur(s): Fenaughty, J.M., D.W. Stevens and S.M. Hanchet

7. Using ecosystem monitoring data to detect impacts

   using monitoring data with no control sites. These methods assess either (i) the expected probability of ... decline in Antarctic fur seal (Arctocephalus gazella) pup production at South Georgia from the early 1990s ... error (false positives and false negatives combined) is lowest with fixed reference point methods. The ... within a few years of its onset, but a fixed reference point method could have provided this sustained ... : Method 4 with inference based on changes in frequency: the observed proportion of years in an n-year ... (Arctocephalus gazella) pup production at South Georgia from the early 1990s within a few years of its onset ... if at ≤ acrit in two or more years of a four-year refer- ence period. Summary of methods: anomalies ... impact is identified in each year from 1998. Method 3 assesses probabilities within moving reference ...

   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

8. Distribution and size of Antarctic krill (Euphausia superba Dana) in Polish commercial catches taken in the Atlantic sector of the Southern Ocean from 1997 to 1999

   summer from 1997 to 1999. The density of concentrations varied with area and season. The densest ... mean density varied from 11 to 31 370 specimens per 1 000 m 3. At night, krill concentrations were ... between February and April (this period varied with year), and then in the South Shetlands area (i.e ... 1999. The density of concentrations varied with area and season. The densest concentrations were ... , therefore their results do not refl ect the year-round structure of krill concentrations. Additionally ... ). Hardy and Günther (1935) and Marr (1962) produced a diagram showing the distribution of krill ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 83–105 : Auteur(s): Jackowski, E

9. Assessments of the stocks of Notothenia rossii marmorata and Champsocephalus gunnari in the South Georgia area

   its pre-exploitation biomass, while the stock of Champsocephalus gunnari has fluctuated greatly with ... of the fishery compared to later year classes. However, in selecting an age-specific natural ... reduction in the stock in the early 1970's led to only a 3-fold increase in per capita recruitment. Since ... , while the stock of Champsocephalus gunnari has fluctuated greatly with no obvious trend ... age data, but with different input values of the terminal fishing mortality and natural mortality ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 1-21 : Auteur(s): Cooke, J.G.

10. Krill (Euphausia superba) distribution in relation to water movement and phytoplankton distribution off the northern South Shetland Islands

    chlorophyll a. Water circulation was studied with satellite-tracked buoys equipped with curtain drogues ... December 1990 to early February 1991. This increased krill density in early February 1991 (157 g/m 2) was ... abundance was low (compared with other seasons) during the first half of summer (December to early February ... this region with the yearly catches of 10 000 to 70 000 tonnes for the past eight years. This region ... December 1990 to 3 February 1991. This increase rate is quite comparable with 5-fold increase observed ... circulation was studied with satellite-tracked buoys equipped with curtain drogues deployed at a level of 30 ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 123–140 : Auteur(s): Ichii, T., H. Ishii and M. Naganobu

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