Résultats de la recherche

1. Analysis of the diet of Champsocephalus gunnari at South Georgia in late summer from 1994 to 1997, Dr Eduardo L. Holmberg surveys

   well as fish, was only occasional or negligible and varied from year to year. The spatial distribution ... /without food in Subarea 48.3, did not show a consistent pattern from year to year.  Likewise, in the four ... and Thysanoessa sp., which are known to be important alternative food in years of krill scarcity, as ... years of krill scarcity), intermediate in 1995 (below years of historically high abundance), and high in ... fish (ranges 12-20 cm/l-2 years) was found in the catches during the RV Dr Eduardo L. Holmberg ... 30 years, even lower than in 1977/78 and 1991, years of krill 'shortage' (Figures 2 and 3) (Kock et ... four years, while krill biomass densities were comparable with those in the previous year and were ... and varied from year to year. The spatial distribution of the main prey items in the diet of C ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 103–123 : Auteur(s): Barrera-Oro, E., R. Casaux and E. Marschoff

2. Beyond MSY: a consideration of definitions of management objectives

   Article II of the CCAMLR Convention. The criteria will depend on whether the main concern is with ... nominal effort each year, based on the values of F and fishing effort in the most recent years. Since ... be met by taking an amount R-S t' so that the escapement (i.e. recruitment op less catch) will ... rate of fishing that gives GNAI. Good recruiting year-classes can be fished harder than weak ones ... that varies about the constant recruitment optimum, being lower when a strong year-class has just ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 299-322 : Auteur(s): Gulland, J.A.

3. Effects of different harvesting strategies on the mackerel icefish Champsocephalus gunnari around South Georgia

   the mackerel icefish (Champsocephalus gunnari) have been simulated for a period of 30 years. These ... constant levels of fishing mortality to the strength of the incoming year class. An increase of F, however ... 50% F 0.1 with F increasing three or five years after a good recruitment; pulse fishing at an ... interval of three years with no fishing in between; and changes in net selectivity resulting in a shift in ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 77–100 : Auteur(s): Köster, F.W. and K.-H. Kock

4. Marine mammals and demersal longline fishery interactions in Crozet and Kerguelen Exclusive Economic Zones: an assessment of depredation levels

   together. An extensive photo-identifi cation effort, primarily focussing on killer whales, allowed a total ... interacting was 8.2 ± 4.7 (n = 552, range 1–20) and 4.1 ± 3.4 (n = 737, range 1–30) individuals respectively ... sector and marine mammal species. 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 11 12 13 14 15 16 17 ... sperm whales Fishing sector Le ve l o f i nt er ac tio n 90% 80% 70% 60% 50% 40% 30% 20 ... identifi ed on 23 different occa- sions). 0 5 10 15 20 25 30 2 3 4 5 6 7 8 9 10 11 12 13 14 20 21 ...

   Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 67–82 : Auteur(s): Roche, C., C. Guinet, N. Gasco and G. Duhamel

5. Information on the status of fjord Notothenia rossii, Gobionotothen gibberifrons and Notothenia coriiceps in the lower South Shetland Islands, derived from the 2000–2006 monitoring program at Potter Cove

   sampling period of 24 years which began in 1983, and at Harmony Cove in the summers of 2001to 2003. The ... ) Notothenia rossii, total catches Years 19.8835 20 0.994173 14.6162 <0.00001 Error 59.3803 873 0.068019 ... (b) Gobionotothen gibberifrons, total catches Years 9.8124 20 0.49062 42.9468 <0.00001 Error 9.9731 ... 873 0.01142 (c) Notothenia coriiceps, total catches Years 32.4684 20 1.623422 11.8377 <0.00001 ... Error 119.7232 873 0.137140 (d) Notothenia rossii, relative catches Years 53439.18 20 2671.959 ...

   Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 83–87 : Auteur(s): Barrera-Oro, E.R. and E.R. Marschoff

6. Improving estimates of Adélie penguin breeding population size: developing factors to adjust one-off population counts for availability bias

   1 Nov 16 1 Dec 16 1 Jan 16 1 Feb 16 0. 0 0. 2 0. 4 0. 6 0. 8 1. 0 0 10 20 30 40 50 60 ... Camera 2 16 1 Nov 16 1 Dec 16 1 Jan 16 1 Feb 16 0. 0 0. 2 0. 4 0. 6 0. 8 1. 0 0 10 20 30 40 50 ... 16 1 Feb 16 0. 0 0. 2 0. 4 0. 6 0. 8 1. 0 10 20 30 40 50 60 C ou nt Date A O n es t a ... va ila bi lit y ad ju st m en t f ac to r 60 50 40 30 20 10 0 C ou nt 50 40 30 20 ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 229–241 : Auteur(s): Southwell, C., J. McKinlay, L. Emmerson, R. Trebilco and K. Newbery

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

   and the Antarctic Convergence areas (between 20° and 30°W) had statistically different length (SL ... year, together with specific features of the reproduction of myctophids, are major factors ... (Konstantinova, 1987, Atlantic sector). Growth rates during the first two years of life were found to be 30 to ... distributed and abundant, with more than 20 species found in the area. Most of them have a circumpolar ...

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

8. Growth and natural mortality of Patagonian rockcod (Patagonotothen guntheri shagensis) from Shag Rocks shelf

   Patagonian rockcod were found to be 2.5 years and 12.6 cm. File:  09-Shilbanov.pdf ... of 2 to 5 years are most abundant. Sexual maturity is attained by fish at 11 to 13 cm length, 20 to ... 30 g weight and age of 2 to 3 years. The sex ratio of fish is actually the same in all size classes ... - t' mean age of fish, 3.42 years age of year class which is fully represented in catches and does ... years The analysis of the age composition curve shows that not all two year old fish were represented ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 111–121 : Auteur(s): Shlibanov, V.I.

9. Trends in relative abundance of fjord Notothenia rossii, Gobionotothen gibberifrons and Notothenia coriiceps at Potter Cove, South Shetland Islands, after commercial fishing in the area

   inshore sub-populations of N. rossii and G. gibberifrons over the last 16 years was most probably caused ... defined as the period from 1 May to 30 April next year. Variance was normalised using the trans ... performed on total and relative catches taken at PC are shown in Table 1. Split-year (1 May to 30 April ... of catch date (Epanenchikov kernel, bandwidth = 0.15), together with the observed split-year mean ... abundance were analysed using an ANOVA design, grouping the hauls on a sp1it;year basis. The split-year is ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 43–52 : Auteur(s): Barrera-Oro, E.R., E.R. Marschoff and R.J. Casaux

10. A proposed management procedure for the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity

    future projections over a 20-year period, and in particular the following four statistics which were ... 20-year projec- tion period is zero under all OMs except for the Pessimistic one for which it is ... Bsp over the 20-year pro- jection period falling below 50% of Ksp is zero for the Optimistic and the ... years (i.e. 2008, 2009, etc. for year y’), the generated longline CPUE abundance indi- ces and longline ...

    Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 33–69 : Auteur(s): Brandão, A. and D.S. Butterworth

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