Résultats de la recherche

1. Oceanic debris observations in the southern ocean whale sanctuary, from Antarctic Peninsula to the Ross Sea: December 1994 to March 1995

   styrofoam fragments. Fishing gear was not a major component of man-made debris. Macrolitter consisted mainly ... of seabird feathers. A very high density (544 per 10nm) of penguin feathers occurred northeast of the ... Ross Sea a single sample contained 31 small dead fish. Natural mesolitter quantities were usually low ... encountered. Biological associations with debris were not common, but included a filamentous green alga and ...

   Meeting Document : SC-CAMLR-XVI/BG/29 : Auteur(s): ASOC Observer

2. Variation in echosounder calibration with temperature and some possible implications for acoustic surveys of krill biomass

   Abstract:  Accurate estimation of krill biomass by acoustic techniques is dependant upon a number ... 2.0 °C) than in European waters (7.3 °C), and a similar trend was detected at 38 kHz. If European ... ensure that echo-sounders are calibrated at a location as close as possible to the area in which surveys ... are to be conducted. In addition, the implications of temperature variation across a survey area for ...

   Meeting Document : WG-EMM-97/52 : Auteur(s): Watkins, J.L., Woodroffe, P., Brierley, A.S., Goss, C.

3. Acoustic discrimination of southern ocean zooplankton

   the existence of a number of horizontally extensive yet vertically discrete scattering layers in the ... upper 250 m of the water column. These layers were fished with a LonghurstHardy plankton recorder (LHPR ... ) and a multiple-opening 8 m2 rectangular mid-water trawl (RMT8). Analysis of catches suggested that ... each scattering layer was composed predominantly of a single species of either the euphausiids ...

   Meeting Document : WG-EMM-97/54 : Auteur(s): Watkins, J.L., Brierley, A.S., Goss, C., Ward, P.

4. Modeling the growth dynamics of Antarctic krill

   Abstract:  A time-dependent, size-structured, bioenergetically-based model was developed to ... examine the growth dynamics of Antarctic krill, Euphausia superba. A system of coupled, ordinary ... processes included in the model were ingestion, assimilation efficiency, a baseline respiration. respiratory ... growth rates; however, winter shrinkage rates were too large. Although the use of a seasonally-varying ...

   Meeting Document : WG-EMM-96/68 : Auteur(s): Lascara, C.M., Hofmann, E.E.

5. Swimming speed and allocation of time during the dive cycle of Antarctic fur seals

   swimming speeds within individuals were between 1 and 2.5 ms-1. This represented a narrower range of speed ... descent and ascent phases of dives with a reduction in speed near the bottom of the dive, when the seals ... were assumed to be feeding on krill. Surface interval increased as a curvilinear function of dive ... predicted by a model (Houston & Carbone, Behav. Ecol., 3, 255-265) which suggested that the metabolic ...

   Meeting Document : WG-EMM-95/25 : Auteur(s): Bevan, R.M., Boyd, I.L., Reid, K.

6. Preliminary study on the breedings of chinstrap and gentoo penguins at Barton Peninsula, King George Island

   Abstract:  A preliminary survey on 2 species of penguins, chinstrap and gentoo was made in the ... CCAMLR standard method. A total of 96 nests for chinstraps and 121 nests for gentoos were monitored to ... document breeding chronology and give a measure of breeding success. The nests to be monitored were ... raised successfully to the creche stage was used as a measure of breeding success. Of the whole nests ...

   Meeting Document : WG-CEMP-93/23 : Auteur(s): H.-C. Shin and S. Kim (Republic of Korea)

7. Age determination of the Antarctic fishes Champsocephalus gunnari and Notothenia rossii from South Georgia

   Abstract:  Foremost in the elucidation of accurate population dynamics parameters in fish is a ... otoliths, calcified tissues which may contain a large amount of biological and ecological information about ... a fish's past history. As part of an effort to study Antarctic fish growth and population ... determined a yearly basis for these species would provide valuable management data. Author(s):  R. Radtke ...

   Meeting Document : SC-CAMLR-VI/BG/43 : Auteur(s): R. Radtke (USA)

8. Development of the VME registry

   Abstract:  The Secretariat has proposed a work plan and budget for the development of a VME ... , paragraph 4.251(xvi)). This registry would include a secure database for holding notification details and ... and information related to VMEs and risk areas and a selection of maps of VMEs, risk areas, and ...

   Meeting Document : WG-FSA-10/07 : Auteur(s): Secretariat

9. Revised biological parameters for the Antarctic skates Amblyraja georgiana and Bathyraja cf. eatonii from theRoss Sea

   immature. For A. georgiana, this resulted in flatter maturity ogives for observer data than lab data, and ... necessarily a good option. Logistic regressions differed significantly between the sexes for both datasets ... , but observer data suggested that females matured at a larger size than males, whereas lab data ... both data sources: 65.9 cm for lab data and 66.5 cm for observer data, suggesting a reasonable overall ...

   Meeting Document : WG-FSA-10/27 : Auteur(s): M.P. Francis (New Zealand)

10. Diet variability and reproductive performance of macaroni penguins (Eudyptes chrysolophus) at Bird Island, South Georgia

    frequency occurrence of T. gaudichaudii both increased with a decreasing proportion of E. superba in the ... or amphipods and 27 % were mixed, suggesting a sigmoidal functional response. The energy and mass of ... feed on a variety of prey types, chick growth was always severely impacted by a shortage of euphausiids ...

    Meeting Document : WG-EMM-12/17 : Auteur(s): C.M. Waluda, S.L. Hill, H.J. Peat and P.N. Trathan (United Kingdom)

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