Résultats de la recherche

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

   Island and the McDonald Islands, an Australian Territory around which a 200-mile EEZ has been declared ... . In order to assess the potential of this area for commercial fishing, and to obtain some preliminary ... data for its  management, three random stratified surveys were conducted to investigate the ... occupies. There was one aggregation area of Lepidonotothen squamifrons on an outlying bank during two ... following changes were Each haul was for 30 minutes duration on the made with respect to summer 1992 ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 0 30 60 90 120 150 180 210 240 270 300 330 360 390 420 Standard length (mm) Standard length (mm ... (1985), the largest size class should be about 15 years old. The length frequencies for both autumn ... years. This supports the notion of the older spawning fish having left the area. Except for the banks ...

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

2. The survivorship of rays discarded from the South Georgia longline fishery

   12 hours, adjusted for the ‘50% survivorship’ category of Table 1. 0% 20% 40% 60% 80% 100 ... -1 0 1 2 sex F M length s( le ng th ) 70 80 90 100 110 -2 -1 0 1 2 3 pa rti al fo r l ... Endicott et al. (2000) suggested this is not the case for the majority of skate by-catch in the longline ... only skates that are alive and undamaged are selected, with animals not being deemed fi t for tagging ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 155–164 : Auteur(s): Endicott, M. and D.J. Agnew

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

   Champsocephalus gunnari in the South Georgia area are assessed using USSR age sample data and recent biomass ... of the fishery compared to later year classes. However, in selecting an age-specific natural ... the later years, it is reasonable to assume a common age-specific catchability function for both ... known) and the net recruitment rate to the stock in each year implied by the age data. The catch at ... age classes would lead to underestimation of the strength of year classes recruited before the start ...

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

4. A fine-scale model of the overlap between penguin foraging demands and the krill fishery in the South Shetland Islands and Antarctic Peninsula

   for a number of reasons, an alternative method of calculating an index of fishery-predator interaction ... (December to March) as an index of overlap between the potential foraging areas of penguins and the ... than for other penguins, and that this overlap has been decreasing since 1988. File:  07agnew ... analysis, mean foraging distance for chinstrap penguins was increased by 50% (from 20 to 30 km), although ... Islands). As this index has proven unsuitable for a number of reasons, an alternative method of ... that 75 to 90% of the total catch for the subarea was taken between December and March within 100 km ... colonies out to 80, 60 and 20 km (Adklie penguins, chinstrap penguins and gentoo penguins respectively ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 99–110 : Auteur(s): Agnew, D.J. and G. Phegan

5. Patterns and processes in the distribution and dynamics of Antarctic krill

   models of increasing complexity be developed iteratively for variability and patchiness of krill ... critical processes to be added. An analysis of spatial distribution of krill in the Bransfield Strait area ... attraction of krill to account for the small-scale aggregations. File:  07-Levin-et-al.pdf ... intermediate scales (4-20 km). It is unfortunate that we do not yet have available comparable data for the ... published spectra for krill, but much less steep than that which commonly has been observed for ... a diameter smaller than 200 m, and that the observed biomass is an average for a 200 m trace. 4 ... ----------~--------~----------~--------~---------~ -2.5 -2 -1.5 -1 -0.5 o LOG FREQUENCY (cycles/km) Power spectra for krill at the 2-20 km scale ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 281–299 : Auteur(s): Levin, S.A., A. Morin and T.M. Powell

6. Preliminary appraisal of Antarctic fish selection by the 32/36 bottom trawl combined with various codends

   of both tape codends were much better. It was found that an optimum mesh size of this codend for ... material used for their construction, incorrectly chosen mesh size, and certain morphological features of ... some Antarctic fish, which make it difficult for them to escape from the codend. Selectivity properties ... selection of Antarctic icefish and bumphead notothenia ranges from 60 to 100 mm. For other Antarctic fish ... were much better. It was found that an optimum mesh size of this codend for selection of Antarctic ... calculated as a mean from 30 measurements. For investigations, only those tows were selected which ... at a 80-90% level clearly ends at this length. with respect to longer fish, the codend material ... level of up to 80-90%, and a second one, resembling a typical selectivity ogive. Unfortunately, this ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 1-48 : Auteur(s): Zaucha, J.

7. Feeding and food intake of Electrona carlsbergi (Tåning, 1932) Myctophidae

   . carlsbergi during the year in the waters to the south of the Antarctic Convergence is about 15 times fish ... , 1986). For an understanding of the role of E. carlsbergi in the ecosystems of the Southern Ocean ... basic data for estimation of the annual and mean daily food intake of fish at age 2 and 3. The annual ... WG-FSA-90/18 o FEEDING AND FOOD INTAKE OF ELECTRONA ... fish body weight. The amount of food consumed by E. carlsbergi during the year in the waters to the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 411–416 : Auteur(s): Gerasimova, O.V.

8. Southern elephant seals and CCAMLR

   been recently confirmed for the Macquarie Island stock. The availability of food, competition with ... it is hoped that this will help to elucidate the reasons for the observed decline of M. leonina  in ... . Afr. J. Sci. 80: 32 - 34. BESTER, M.N. & P-Y LENGLART. 1982. An analysis of the southern elephant ... recently confirmed for the Macquarie Island stock. The availability of food, competition with rapidly ... initiated and it is hoped that this will help to elucidate the reasons for the observed decline of M ... order varying from 2.5% (Heard; 1949 - 1985) to 4.6% a- 1 (Marion; 1973 - 1986) for adult cows. The ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 465-473 : Auteur(s): Bester, M.N. and D.G.M. Miller

9. A functional division of Electrona carlsbergi (Tåning, 1932) area of habitat in relation to the latitudinal zonation of the Southern Ocean

   Southern Atlantic along two meridional transects at 17° and 20°W in the latitudes from 37°30' to 55°30 ... the RV Vozrozhdenie (VNIRO, USSR) in March/April 1990 an integrated study survey was conducted in the ... carlsbergi and also on searching for possible spawning areas of the species. During the survey the following ... for spawning occur in ridge areas, due to powerful meandering currents and an increased level of gyre ... southern boundary of the PFZ passed between 54°30' and 55°S. However, water structure typical for this ... smallest modal lengths were also typical for these zones. In other words, an increase in the modal length ... fishing grounds and target species in recent years has opened up great opportunities for exploiting ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 369–395 : Auteur(s): Zemsky, A.V. and S.A. Zozulya

10. Selectivity of standard Polish commercial trawl codends on Antarctic fishing grounds

    Abstract / Description:  Selectivity studies were carried out for two types of steelon codends used in ... commercial fishery, with a nominal mesh size A = 80 mm and A = 100 mm, made of double twines with a thickness ... for codend construction. The most difficult matter will be preparing a codend with proper selectivity ... properties for South Georgia icefish, because this species exhibits the smallest tendency to escape during ... in the case of 80 mm codend. Selection effectiveness increased from 20% for 80 mm codend to almost ... I I / B / / /: I I I I I ./e r-=- 20 30 Figure 5: Selectivity ogive for ... -.-_ .... 1 20 1 1 1 I 1 1 1 30 ':'0 50 Figure 7: Selectivity ogive for Antarctic icefish by ... 40 I J i 30 I 20 Figure 8: Selectivity ogives for Antarctic icefish on Antarctic fishing grounds ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 107-142 : Auteur(s): Zaucha, J.

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