Résultats de la recherche

1. Management and uncertainty: the example of South Georgia

   . From an examination of Articles IX 2(f) and XV 2(e, d) of the CCAMLR Convention it follows that a ... (including the effects of doing nothing) could provide a procedure for providing advice that could cope with ... :  Decisions on fishery management are often made with some degree of uncertainty in scientific advice. Such ... closure become apparent. On the central view, it would take only a year after a 10-year closure for ... millions before 1965, to some 3 to 6 millions for the 1967 to 1975 year-classes, to possibly only 40,000 ... in the 1980 year-class (paragraph 20 of the report). - 346 - Accepting that the decline in ... quite small, perhaps a yield per recruit of 500 gms, and an average year-class strength of only 1 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 341-353 : Auteur(s): Gulland, J.A.

2. Status of the coastal stocks of Dissostichus spp. in East Antarctica (Divisions 58.4.1 and 58.4.2)

   with the Ross Sea, where an analytical assessment has been possible for several years, and through ... . An experiment run from 2005 to 2008 required the tagging of toothfish as a prerequisite for ... 58.4.1 and 58.4.2) Abstract / Description:  Exploratory fisheries for Dissostichus spp. have been ... operating off the coast of East Antarctica (30°E–150°E; FAO/CCAMLR Divisions 58.4.1 and 58.4.2) since 2003 ... 58.4.2. Fishing years extend from 1 December of the previous year to 30 November of the named year ... - mental fishery at what it considered to be an arbi- trary, but precautionary, level of 260 tonnes for ... been recovered. Two alter- native methods were employed to assess the size of the stock; an analysis ... of toothfish in an area, with animals only being replaced by immigration over the scale of a year ...

   Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 71–100 : Auteur(s): Agnew, D.J., C. Edwards, R. Hillary, R. Mitchell and L.J. López Abellán

3. Selectivity of commercial and research trawls in relation to krill

   RT 72/308 and an Isaacs-Kidd midwater research trawl (IKMT). The commercial trawl catches contained ... more large krill (35-58 mm) than catches of the research trawl (30-54 mm). The maximum difference in ... research trawl. The two types of trawl have different catchability characteristics: the research trawl is ... better at retaining small krill, while the opposite is true for the commercial trawl. Consequently ... CCAMLR's Working Group on Krill (WG-Krill) (35-58 mm) than the IKMT trawl (30-54 mm) (see for an operating ... ~rika), and an RT 72/308 commercial trawl (RV Augus). Trawling duration was 30 minutes and trawhg ... results obtained for hauls made on the same krill aggregation were used for comparative analysis. Three ... expressed towards Yu. V. Kadilnikov for his assistance in preparing this article. REFERENCES Greene ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 161–169 : Auteur(s): Kasatkina, S.M

4. Acoustic estimates of krill density at South Georgia, 1981 to 1998

   from year to year over that time, ranging from ≈ 2 to  ≈ 150 g m-2 (fresh mass). The 1982, 1991 and ... % confidence limits <15 g m-2). For five of the summers between 1990 and 1998 it was possible to calculate ... separate density estimates for northeastern and northwestern South Georgia, and in four of these seasons ... for an area equivalent to the western box. In three other of the years considered here data were ... given year is less than p - o for all years, then the year in Acoustic estimates of krill density ... the year in which krill density at the island was the lowest of all years for which data are ... equivalent to both the present-day survey boxes in two seasons, 1990 and 1994. Data for 1986 were available ...

   Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 47–57 : Auteur(s): Brierley, A.S., J.L. Watkins, C. Goss, M.T. Wilkinson and I. Everson

5. Composition and characteristics of ichthyofauna in pelagic waters of South Georgia (Subarea 48.3)

   BMRT Anchar (1990) over one to two days. Each series consisted of five to seven tows of 10 to 20 ... following species, not mentioned in previous studies as occurring in this area, were observed for the ... Georgia 30 30 - 25 20 % Gij 25 n7kaL Gij 28 5 - 0 0 0 0 0 0 0 0 0 0 c ) o ~ T - ~ c ) o ~ T ... , 20 1 B Gii 30 Length (mm) Figure 11: Length composition of M. microps. Frolkina et al ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 125–164 : Auteur(s): Frolkina, G.A., M.P. Konstantinova and I.A Trunov

6. Mesopelagic fish of the Southern Ocean - summary results of recent Soviet studies

   Abstract / Description:  Since 1963, Soviet research on Antarctic mesopelagic fish has been carried out as ... a part of the general multi-disciplinary program of research on Antarctic biological resources ... . Studies concentrate primarily on the following four most abundant species: Electrona carlsbergi, Electrona ... data are available on their feeding, reproduction and age/length composition. The paper summarizes ... (Konstantinova, 1987, Atlantic sector). Growth rates during the first two years of life were found to be 30 to ... assessment should thus be attempted for each species separately. As mentioned above, spawning and feeding of ... the ACC waters which have an adequate supply of food both for young and adult fish throughout the ... feeding rates throughout the day revealed two peaks: an extended morning and shorter evening periods ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 433–457 : Auteur(s): Sabourenkov, E.N.

7. 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 ... has been developed. The new index reflects the functional interaction between these two utilisers of ... 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 ... distances of 11 to 24 km at bearings between 330" and 033" for chinstrap penguins, and 20 to 40 km at ... n mile square was obtained by s'umming PM for all minor units within the square. An index of the ...

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

8. Comparison of age readings from scales and otoliths of the Patagonian toothfish (Dissostichus eleginoides) from South Georgia

   test for paired data (Ts = 0.256, n = 59) conducted on the remaining 56% showed that differences in age ... compared for 105 specimens of the Patagonian toothfish (Dissostichus eleginoides) from the South Georgia ... estimates between the two methods were not significant. Otoliths frequently appeared totally opaque, making ... appropriate for determining the age of D. eleginoides because it does not underestimate age and is the most ... . eleginoides is an opportunistic feeder that growth parameters for specimens collected in takes advantage of ... soaked for one week in a solution of 20% alcohol (96"), 5% glycerin, a few drops of domestic detergent ... represents one year of life. Counting such annuli is a valid technique for determining the age of Antarctic ... about seven years, followed by a period when an increase in thickness is the main result of growth ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 191–203 : Auteur(s): Cassia, M.C

9. Surveys of breeding penguins and other seabirds in the South Shetland Islands, Antarctica, January-February 1987*

   to have been about 40% overall increase in the chinstrap population in the last 20-30 years, about ... available nesting habitat in 1987. For the same reason, at least in part, other species of breeding seabirds ... Memorandum NMFS Antarctic Marine Living Resources Program (AMLR)) File:  20-Shuford-and-Spear.pdf ... Living Resources Program in 1987 provided data on the number, size, and location of penguin and Antarctic ... a jugula ire ait augmente globalement d'a peu pres 40% au cours des dernieres 20-30 annees ... 20-30 anos, aproximadamente tres cuartas partes de la diferencia entre nuestros recuentos y los ... rro rrpeAblAYlI\l1M OlleHKaM. XOTH, KaK Ka)KeTCH, 3a rrOCJIeAHl1e 20-30 JIeT o611\ee KOJII1QeCTBO ... -30 years, about three-fourths of the difference between our counts and previous ones is due to more ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 449-451 : Auteur(s): Shuford, W.D. and L.B. Spear

10. Age determination of Notothenia gibberifrons from the South Shetland Islands, Antarctic Peninsula subarea (Subarea 48.1)

    Notothenia gibberifrons specimens collected at two localities near the South Shetland Islands (Low I. and ... scale readings gave a result of one year more. This could arise from the difficulty in differentiating ... most reliable method. Mean length data at age presented here for Low I. specimens were compared with ... previously for specimens of South Bay, Palmer Archipelago. Possible reasons for these differences are ... ), however, no data were obtained for the first 1-4 year age groups. Therefore, growth curves were not ... one extra year (Table 1). This could arise from the difficulties with false checks as mentioned above ... ~ N 0'= 42 0 8 r ~n N~ = 53 ~ 6 4 z 2 ---- >- 14 16 18 20 22 24 26 28 30 32 34 36 38 u z t4 ... w :::> 12 ~ iO t N cf= 15 0 0::: 8 r B ~ I.L N~ = 22 6 4 2 14 16 18 20 22 24 26 28 30 ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 143-160 : Auteur(s): Barrera-Oro, E.

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