Résultats de la recherche

1. The Soviet krill fishery in the Atlantic Sector of the Antarctic from 1977 to 1991: fishing effort distribution and interannual patterns

   previous period, with the krill fi shery occurring in Subarea 48.2 in the fi rst half of the year. There ... 48.3, with a quasi-4-year lag between the South Shetlands, the South Orkneys and South Georgia ... and mid-1980s and the early 1990s respectively. The years 1980, 1986 and 1991 corresponded to the ... , winter 1983. Deep-Sea Res., 32 (3): 369–378. Litvinov et al. 12 Kats, A.L. 1960. Seasonal ...

   Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 1–13 : Auteur(s): Litvinov, F.F., V.A. Sushin, G.A. Chernega and O.A. Berezhinsky

2. Is current management of the Antarctic krill fishery in the Atlantic sector of the Southern Ocean precautionary?

   1991, is 0.62 million tonnes year –1, equivalent to ~1% of the regional biomass estimated in 2000. Each ... subarea has also had its own catch limit, between 0.093 and 0.279 million tonnes year –1, since 2009 ... ;50% of the trigger level since 1991. Comparison with the 9.3% reference exploitation rate suggests ... recent years. This suggests that fishing at the trigger level would be equivalent to a long-term ... * The survey area is 65 000 km2, but the area accessible each year varies with ice coverage ... with subarea catches (Table 5) gives a maximum feasible exploitation rate in each year. In Subarea ... 48.1, this maximum has been consistently ≤9%. In Subarea 48.2, it was ≤2% in each year with ... indices shown in Table 3. A negative correlation (r) between year and biomass, or a late period mean that ...

   Science Journal Paper : CCAMLR Science, Volume 23 (CCAMLR Science, Volume 23) : 31–51 : Auteur(s): Hill, S.L., A. Atkinson, C. Darby, S. Fielding, B.A. Krafft, O.R. Godø, G. Skaret, P.N. Trathan and J.L. Watkins

3. Estimation of effective sample size for catch-at-age and catch-at-length data using simulated data from the Dirichlet-multinomial distribution

   model in predicting class/bin by year frequencies is used to obtain a single, across-years, over ... year is important for such assessments, and this issue is studied using simulation. Between-haul ... heterogeneity within fishing year was simulated using samples from the Dirichlet-multinomial (D-M) distribution ... , with marginal class probabilities generated using a simple age-structured model incorporating fishing ... to 0.1544 by year 20 with a value of 0.13 at year 10.5 and recruitment was also varied lin- early ... , but in this case, declining from 196 939 for year 1 to 3 061 for year 20 with a value of 100 000 at ... within fishing year was simulated using samples from the Dirichlet-multinomial (D-M) distribution, with ... -length frequencies with kP′ replacing Pa. For simulation Model 2, to obtain the Pa for each year, the ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 115–138 : Auteur(s): Candy, S.G

4. Age estimation and maturity of the ridge-scaled macrourid (Macrourus whitsoni) from the Ross Sea

   work on this species. Von Bertalanffy growth models assuming different growth by sex and by year-within ... test. Von Bertalanffy parameters for the pooled dataset with unsexed juveniles are L ∞ 76.12, K 0.065 ... mean total length-at-maturity (38.8 and 46.4 cm) and mean age-at-maturity (10.6 and 13.6 years) are ... validation: the state of the art. Fish. Res., 51 (2–3): 377–383. Pearson, H.S. and H.O. Hartley. 1962 ... models assuming different growth by sex and by year-within-sex were fitted separately to a revised ... pooled dataset with unsexed juveniles are L∞ 76.12, K 0.065 and t0 –0.159 for males and L∞ 92.03, K ... spp.) in the waters in and near the Ross Sea, Antarctica, has operated each year since 1998 (Hanchet ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 291–303 : Auteur(s): Marriott, P.M., M.J. Manning and P.L. Horn

5. Timing of clutch initiation in Pygoscelis penguins on the Antarctic Peninsula: towards an improved understanding of off-peak census correction factors

   counts with non-standard timing. The challenge is, therefore, to correct ‘off-peak’ census counts to make ... them comparable with current standard methods. Census correction involves knowing (i) how the census is ... the peak of clutch initiation is presented and, along with a simple estimation of species-specific ... breeding is higher at more northerly sites (Bost and Jouventin, 1990a) with year-to-year variability ... . Individual year trends (gray solid lines) are included along with the species-aggregated best-fit regression ... (taken as ±1 day), whereas for Method 3, the additional error arose from uncertainty associated with ... ) Stage 3: , , , . . * . * . . * i j t jsp i j t tsp i CID mean baseline lat eff lat temp eff Oct ...

   Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 149–165 : Auteur(s): Lynch, H.J., W.F. Fagan, R. Naveen, S.G. Trivelpiece and W.Z. Trivelpiece

6. Protecting young fish and spawning aggregations of Champsocephalus gunnari in Subarea 48.3 (South Georgia): a review

   approximately with the start of the spawning season, and there is no evidence of a time of year when a closed ... In common with other species of icefish at starts early might reasonably be expected to South ... providing substantial and timely assistance with researching the early reports of the Commission and ... year was consistently applied in years when the C. gunnari 2 2 fishery in Subarea 48.3 was open. B 3 ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 75–86 : Auteur(s): Parkes, G.B

7. Spawning locations of mackerel icefish at South Georgia

   and temporal distribution and early life history relevant to monitoring year class strength and ... is those with gonads in stages 3, 4 and 5, were present around Shag Rocks and to the north of Sout11 ... along with a few specimens of the Batliydraconid Poraclznn~iclztl?ys georgiatzus and the channichthyid ... ) reported a catch of 4 000 C, giinnari in a single haul. With the exception of eight small specimens (67 ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 107–118 : Auteur(s): Everson, I., A.W. North, A. Paul, R. Cooper, N.C. McWilliam and K.-H. Kock

8. A review of the effectiveness of streamer lines as a seabird by-catch mitigation technique in longline fisheries and CCAMLR streamer line requirements

   experimental cruises over several years. Further, he demonstrated that signifi cantly fewer baits were lost ... the appendix to Conservation Measure 29/X, were based on early observations of streamer lines used ... shing location, time of year and weather conditions are also likely to affect the performance of ... inconclusive, with the excep tion of Moreno et al. (1996). Based on a subset of data collected under ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 189–201 : Auteur(s): Melvin, E.F., B. Sullivan, G. Robertson and B. Wienecke

9. Spatial distribution of management measures, Antarctic krill catch and Southern Ocean bioregions: implications for conservation planning

   species, with Subarea 48.3 (3% of the total area) the only management area open to fishing for all of ... -thirds of all subareas, but with relatively low coverage in terms of area. Bioregions 3 (Polar Front ... . 2002. Rigor and Representativeness in Marine Protected Area Design. Coastal Man- agement, 30 (3): 237 ... ). Various authors have described individual steps for this process with slightly different formulations ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 1–19 : Auteur(s): Grant, S.M., S.L. Hill and P.T. Fretwell

10. Surface areas of seabed within the 500 m isobath regions within the South Shetland Islands (Subarea 48.1)

    or bias in computation of seabed areas can directly affect point estimates of standing stock. Early ... isobath by combining Admiralty Chart data with soundings collected during research cruises by the ... . However, there were several areas between the charts with discrepancies, as well as a distinct break in ... , which may have been included in the estimates of Kock and Harm (1995). This region is associated with ...

    Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 133–140 : Auteur(s): Jones, C.D., S.N. Sexton and R.E. Cosgrove III

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