Résultats de la recherche

1. Observations on haul-out patterns and trends in the breeding populations of southern elephant seal at Península Valdés (Patagonia) and Stranger Point (25 de Mayo - King George I.)

   de Mayo-King George I. were studied during the breeding season from 1979 to 1987. Two main objectives ... Paper Title:  Observations on haul-out patterns and trends in the breeding populations of southern ... of r between these two years is 0.05, similar to the one estimated for this population by McCann ... two different places. One of them was located at 25 de Mayo I. (King George) (1980-1986 except for ... (van Aarde, 1980). In this paper we present information on the last seven years in two breeding ... Convergence. Most of the breeding places are located on islands, except for the herd found on the coast of ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 453-463 : Auteur(s): Vergani, D.F., M.N. Lewis and Z.B. Stanganelli

2. Distribution and relative abundance of Antarctic toothfish (Dissostichus mawsoni) on the Ross Sea shelf

   , with some evidence for an ontogenetic migration from east to west as they grow. From the fisheries data ... available, there is no evidence for a northward contraction in the range of D. mawsoni over the course of ... Paper Title:  Distribution and relative abundance of Antarctic toothfish (Dissostichus mawsoni) on ... relative abundance of Antarctic toothfish (Dissostichus mawsoni) on the Ross Sea shelf (defined here as the ... for all years up to, and includ- ing, the 2007/08 fishing year. The observer data used in this report ... 88.2 for all years up to, and including, the 2007/08 fishing year. Data error checking and grooming ... caught in each of the three grounds, for years where more than 10 sets were completed, is shown by year ... length, with some evidence for an ontogenetic migration from east to west as they grow. From the ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 33–51 : Auteur(s): Hanchet, S.M., S. Mormede and A. Dunn

3. The effects of monitoring procedures on Adélie penguins

   loss. There was a slight reduction in return rates of birds banded for more than one season, but no ... incubation period resulted in increased foraging trip durations and reduced breeding success. Attachment for ... . No reduction in fledging rates of chicks from nests of stomach-lavaged birds was detected over two ... breeding seasons. The implications of these findings for the CCAMLR Ecosystem Monitoring Program are ... returned to the colony as two-year-olds (1993/94 summer). Ainley et al. (1983) reported that 30% of all ... . Given a similar return rate for two-year-olds at Bechervaise Island, we can expect to detect up to 23 ... slightly lower return rate (64%) for non-recaptured birds banded for two years compared with the range of ... for two to three years. Although our use of stainless steel bands as compared to the aluminium bands ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 155–164 : Auteur(s): Clarke, J. and K. Kerry

4. On the intensity of sampling krill trawl catches

   uses actual krill length-frequency data in an attempt to address the problem of the determination of ... . The possible effect of two other factors (within-trawl variability and sample decomposition) which may ... stages; • for most purposes a minimum sample size of at least 100 animals/trawl is necessary to obtain ... Paper Title:  On the intensity of sampling krill trawl catches Abstract / Description:  This paper ... variance was calculated from the combined error mean squares for length at the two islands derived by the ... most suited for the detection of a 2 mm difference in mean length between the two areas. A similar ... length are analyzed (see Appendix 1 (B) for details of analytical procedures) for the two areas ... and F=2.14 and 1.295 [a=0.05] for measured sample sizes of 50 and 100 animals at the two islands ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 29–48 : Auteur(s): Miller, D.G.M.

5. A review of data on abundance, trends in abundance, habitat use and diet of ice-breeding seals in the Southern Ocean (submitted to the 2008 Joint CCAMLR-IWC Workshop)

   important first steps for improving ecosystem models. This review focuses on seals that breed in ice ... Paper Title:  A review of data on abundance, trends in abundance, habitat use and diet of ice ... ; leopard seal, Hydrurga leptonyx; and Weddell seal, Leptonychotes weddellii). Data on populations ... . Recently the Scientific Committees of two Commissions responsible for managing biota in the Southern ... were then summed to derive an estimated total population size for each species in each region (Table ... ), south Indian Ocean (20°E–90°E) and Weddell Sea (20°E–60°W)). The haul-out model developed for ... into pelagic areas of the Southern Ocean for most of the year and return to the pack- ice only for ...

   Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 49–74 : Auteur(s): Southwell, C., J. Bengtson, M. Bester, A.S. Blix, H. Bornemann, P. Boveng and M. Cameron, J. Forcada, J. Laake, E. Nordøy, J. Plötz, T. Rogers, D. Southwell, D. Steinhage, B.S. Stewart and P. Trathan

6. Vertical migrations of mackerel icefish (Champsocephalus gunnari) on the South Georgia shelf

   may be used for clarification of survey techniques used in stock assessment. For a number of years ... shelf (Parkes et al., 1989) challenge the rationale for round-the-clock trawling and call for ... migrations of mackerel icefish. The study used data from research vessels which had been fishing for ... scientists of AtlantNIRO have been conducting trawl surveys for C. gunnari during daylight hours only. File ... to the surface layers than to the bottom layers. An echo sounder was used to search for fish ... information obtained on vertical migrations of C. gunnari may be used for clarification of survey techniques ... used in stock assessment. For a number of years scientists of AtlantNIRO have been conducting trawl ... presents catch data obtained from research vessels fishing for commercial concentrations of C. gunnari on ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 3–14 : Auteur(s): Frolkina, J.A. and V.I. Shlibanov

7. Preliminary study on nesting Adélie penguins disturbance by unmanned aerial vehicles

   or piston engine UAVs. Plans for a systematic monitoring of UAV impact on wildlife, as well as ... with penguins looking up and around for a few seconds when the UAV was overhead. Similar symptoms of ... preliminary guidelines for the next field season, were formulated. File:  Kidawa et al.pdf ... Paper Title:  Preliminary study on nesting Adélie penguins disturbance by unmanned aerial vehicles ... two anonymous reviewers for their most helpful comments on the manuscript. References Anderson, K ... disturbance by UAVs   Resting Comfort Vigilance/anxiety Aggression 100 90 80 70 60 50 40 30 20 ... . The best option is a 20–30 minute recording with the overflight around its midpoint. • Noise ... hexacopter hovering at an altitude of 30 m was lost in the background (Goebel et al., 2015). Pomeroy et al ...

   Science Journal Paper : CCAMLR Science, Volume 23 (CCAMLR Science, Volume 23) : 1–16 : Auteur(s): Korczak-Abshire, M., A. Kidawa, A. Zmarz, R. Storvold, S.R. Karlsen, M. Rodzewicz, K. Chwedorzewska and A. Znój

8. Distribution and abundance of Macrourus carinatus on BANZARE Bank in the southern Indian Ocean

   Indian Ocean Abstract / Description:  This paper provides an assessment of the distribution and abundance ... Paper Title:  Distribution and abundance of Macrourus carinatus on BANZARE Bank in the southern ... of Macrourus carinatus on BANZARE Bank in the southern Indian Ocean (Divisions 58.4.1 and 58.4.3 ... ) based on results from a trawl survey in 1999. This is the first quantitative assessment of M. carinatus ... . MATERIALS AND METHODS In 1999 an exploratory trawl fishery for Dissostichus spp. was undertaken at ... species. Until ACKNOWLEDGEMENTS We would like to thank Kevin Sullivan and an anonymous reviewer for ... in recent years due to the increase in longline fisheries for toothfish (Dissostichus spp.) in the ... species on BANZARE Bank. This assessment is the first step towards developing an estimate of long-term ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 171–178 : Auteur(s): van Wijk, E.M., A.J. Constable, R. Williams and T. Lamb

9. Target strength studies on Antarctic silverfish (Pleuragramma antarcticum) in the Ross Sea

   continental slope and shelf of the Ross Sea at depths from 30 to 120 m, during the Italian expeditions of 1997 ... /98, 2000 and 2004. The regression lines for estimating TS from nine experiments were: TS 38 ... main contribution to the scattering for small fish is from soft tissues and for larger sizes from hard ... Paper Title:  Target strength studies on Antarctic silverfish (Pleuragramma antarcticum) in the ... juvenile stages (size: 45–48 mm; age: second year), coinciding with an increase in lipid content in the ... specific ventral sacs (from 12–15% of first year to 20–32% dry weight (DW) of second year; DeVries and ... coefficient m has been found to be close to 20 for a great many fish species (e.g. backscattering is ... , a standard value of Ψ obtained averaging the two-way beam angles and –3 dB beam widths (θ) for all ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 75–104 : Auteur(s): Azzali, M., I. Leonori, I. Biagiotti, A. De Felice, M. Angiolillo, M. Bottaro and M. Vacchi

10. Australian research on Antarctic bird and seal diets

    Paper Title:  Australian research on Antarctic bird and seal diets Abstract / Description:  Many ... data on the diets of important vertebrate predator species in Prydz Bay and around the sub-Antarctic ... Heard and Macquarie Islands have been collected during the last seven years. Published and unpublished ... results are collated and summarised, and several important points emerge. In Prydz Bay, on which is ... ) 20 38 3' 1 58 400 39 29 32 o Location: Sea ice off Davis Station (68°30'S: 77°50'E ... initially in response to the need identified by the BIOMASS Programme for data on the diets of vertebrate ... dependence on E. superba for food, and in many cases on euphausiids in general. Conversely fish, and in ... Davis Station (68°30'S:77°50'E), in the south-eastern corner of the Prydz Bay Priority Area of CEMP ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 231-249 : Auteur(s): Williams, R.

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