Résultats de la recherche

1. A statistical method for estimating the level of IUU fishing: application to CCAMLR Subarea 48.3

   , and confidence intervals for, fish and bird catches by IUU vessels. In order to estimate an IUU catch ... there must have been at least one encounter with an FPV in a year; no encounters in a year are ... to have been observed when the IUU vessel and the FPV vessel were in the same place at the same time ... observed. These data were obtained in the early licensed fishery (1997) when few vessels used mitigation ... bird catches by IUU vessels. In order to estimate an IUU catch there must have been at least one ... encounter with an FPV in a year; no encounters in a year are interpreted as zero IUU fi shing. For each IUU ... vessel and the FPV vessel were in the same place at the same time. When this occurred, the FPV was ... in the early licensed fi shery (1997) when few vessels used mitigation measures. Three years were ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 119–141 : Auteur(s): Agnew, D.J. and G.P. Kirkwood

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

   ) predominating. Grey-headed albatrosses, whose populations (at South Georgia are in serious decline, were ... disproportionately affected in relation to their numbers near the fishing vessel; giant petrels may be ... disproportionately affected in relation to the size of their breeding population at South Georgia when compared to ... lost to birds. Murray et al. (1993) estimated a minimum of 3 652 seabirds caught in New Zealand ... -headed albatrosses, whose populations (at South Georgia are in serious decline, were disproportionately ... affected in relation to their numbers near the fishing vessel; giant petrels may be disproportionately ... affected in relation to the size of their breeding population at South Georgia when compared to ...

   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

3. Detection and quantitative estimation of krill concentrations by hydroacoustic instruments

   instruments Abstract / Description:  The limited capabilities of existing hydroacoustic instruments in ... in areas surveyed. The task of detecting surface concentrations of krill can be solved with the help ... capable of registering individual krill at a depth of 50–60 m while the vessel is in motion. According to ... expense of a rise in the acoustic power of emission. File:  06-Yudanov.pdf ... which mainly depend on light conditions. During daylight hours, krill usually stay in the middle ... limited capabilities of existing hydroacoustic instruments in detecting dispersed and surface ... concentrations of krill lead to considerable underestimates of krill biomass in areas surveyed. The task of ... individual krill at a depth of 50 - 60 m while the vessel is in motion. According to theoretical ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 123-139 : Auteur(s): Yudanov, K.I.

4. Physical oceanographic setting of the Siedlecki January 1987, South Shetland Island data set

   data set Abstract / Description:  In the vicinity of the northern tip of the Antarctic Peninsula, the ... relatively cold and low in salinity throughout the water column and prone to deep reach convective events ... -Scotia Confluence in the Bransfield Straits is associated with abundant krill populations. It is ... in the eastern end of the Bransfield Straits falls in the region of 0° to -0.7°C; 34.65, marking the ... into the region along the extreme western edge of the Weddell Gyre. It is relatively cold and low in ... south, perhaps associated with mesoscale structures. The Weddell-Scotia Confluence in the Bransfield ... to these changes in the habitat. Our challenge is to understand the causes of environmental ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 161-184 : Auteur(s): Gordon, A.L.

5. Joinville–D’Urville Islands (Subarea 48.1) – a former fishing ground for the spiny icefish (Chaenodraco wilsoni), at the tip of the Antarctic Peninsula – revisited

   :  The former fishing ground off Joinville–D’Urville Islands was revisited in the course of the Antarctic ... Expedition ANT XIX/3 by RV Polarstern in February 2002. Five hauls were conducted north of the two islands at ... depths of 149 to 282 m on 21 February 2002. Published and unpublished reports from fishing operations in ... the 1970s and 1980s by the Fischkombinat in Rostock (former GDR), Sea Fisheries Institute in Gdynia ... adult females caught (n = 10) suggested that C. rastrospinosus was in the middle of the spawning ... the middle of its spawning season when taken in the second half of February. Sosinski et al. (1981 ... Joinville–D’Urville Islands was revisited in the course of the Antarctic Expedition ANT XIX/3 by RV ... Polarstern in February 2002. Five hauls were conducted north of the two islands at depths of 149 to 282 m on ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 1–20 : Auteur(s): Kock, K.-H., L. Pshenichnov, C.D. Jones, K. Shust, K.E. Skora and Zh.A. Frolkina

6. The gentoo penguin as a candidate species for the CCAMLR Ecosystem Monitoring Program

   in the CEMP. The extensive dependence of this species in these ISRs on Euphausia superba, (including ... in winter), its residence in the ISRs in winter and its early attainment of sexual maturity are all ... penguin meets the specified criteria qualifying species for inclusion in the CEMP. The extensive ... dependence of this species in these ISRs on Euphausia superba, (including in winter), its residence in the ... ISRs in winter and its early attainment of sexual maturity are all features of special relevance to ... components identified; (ii) wide geographic distribution; (ill) importance in the ecosystem; (iv ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 483–488 : Auteur(s): Croxall, J.P. and T.D. Williams

7. Fitting Euphausia superba into Southern Ocean food-web models: a review of data sources and their limitations

   include krill in food-web models and to guide modellers to key sources of data. It describes the strengths ... fishery (sustained sampling in one place and wide area and time coverage) and via predators (long time ... . Temporally, the intense (order of magnitude) interannual variability in krill population size within the ... . Growth in spring, summer and autumn is now fairly well quantified, but mortality remains an enigma. We ... superba). This is because (i) they have an important role in the food web of parts of the Southern Ocean ... early life cycle (Daly and Macaulay, 1991; Siegel and Loeb, 1995), and reductions in sea-ice have ... prompted concerns over what might happen to these populations in future (Atkinson et al., 2004; Flores et ... al., 2012). Antarctic krill (hereafter simply referred to as krill) are micronekton (up to 65 mm in ...

   Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 219–245 : Auteur(s): A. Atkinson, S. Nicol, S. Kawaguchi, E. Pakhomov, L. Quetin, R. Ross, S. Hill, C. Reiss, V. Siegel, G. Tarling (submitted to the 2008 Joint CCAMLR-IWC Workshop)

8. Seabird interactions with longlining operations for Dissostichus eleginoides at the South Sandwich Islands and South Georgia

   mortality was seen and only one bird was caught on a hook; nevertheless many species in these aggregations ... of birds are clearly potentially vulnerable to setting operations in daylight hours. Several species ... grey-headed albatrosses, whose populations are in serious decline at South Georgia, were rare; their ... vulnerability to longlining operations in the South Sandwich Islands may, therefore, be low. Quantitative data ... setting operations. The potential cost in lost time, equipment or fishing efficiency should not be under ... species in these aggregations of birds are clearly potentially vulnerable to setting operations in ... populations; however wandering and grey-headed albatrosses, whose populations are in serious decline at South ... Georgia, were rare; their vulnerability to longlining operations in the South Sandwich Islands may ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 143–153 : Auteur(s): Ashford, J.R., J.P. Croxall, P.S. Rubilar and C.A. Moreno

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

   of antifreeze in the former species. Dissostichus eleginoides showed a resting stage in sexual ... maturity, while D. mawsoni was in developing condition. In D. mawsoni, small fish contributed a very low ... latitudinal patterns in sexual maturity and size composition. The study indicates that the management of ... showed that a high propor- tion of juveniles were west of 90°E, but rarely in the eastern area. Thus, a ... Toothfish are the largest nototheniid species in the Southern Ocean, with two species having a cir ... the lack of antifreeze in the former species. Dissostichus eleginoides showed a resting stage in ... sexual maturity, while D. mawsoni was in developing condition. In D. mawsoni, small fish contributed a ...

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

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

    four periods of extensive ice cover during the last 18 years. Variability in seasonal timing, areal ... 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 ... of sea-ice cover were integrated over time to produce an annual index of sea-ice cover in units of 10 ... . Variability in seasonal timing, area1 extent, seasonal duration and persistence of sea-ice over multiple ... cover in the Bellingsliausen Sea. Periods of extensive winter ice cover peaked in 1980, 1986, 1991 and ... index of sea-ice cover in units of 10h km2/month. This index may be used in conjunction with studies ... of variability in biological production, particularly the reproductive success of Antarctic krill ...

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

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