Résultats de la recherche

1. The gentoo penguin as a candidate species for the CCAMLR Ecosystem Monitoring Program

   in winter), its residence in the ISRs in winter and its early attainment of sexual maturity are all ... years at Bird Island, South Georgia and at the South Shetland Islands (both within Integrated Study ... any, CEMP species which are readily accessible on land throughout the year. 4.2 Early Sexual ... Maturity With typical ages of first breeding being at two and three years old (Williams, 1990), gentoo ... ISRs in winter and its early attainment of sexual maturity are all features of special relevance to ... probably not main diet, except for South Georgia, with fish and squid also important, or (ii) - only in ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 483–488 : Auteur(s): Croxall, J.P. and T.D. Williams

2. Towards the development of a management plan for mackerel icefish (Champsocephalus gunnari) in Subarea 48.3

   mortality rates. These may be associated with increased consumption of C. gunnari by Antarctic fur seals in ... predictions of coming periods of krill scarcity as early warnings of increased natural mortality of C. gunnari ... based on the CCAMLR generalised yield model (GYM), with periodically varying natural mortality, provides ... years of poor krill availability. Thus natural  ortality of C. gunnari may, in some years, increase by a ... rates. These may be associated with increased consumption of C. gunnari by Antarctic fur seals in years ... fishing pressure. Rather, they may have been associated with increased predation by fur seals in years ... early 1990s detected large declines in the C. gunnari population in the years 1990/91 and 1993/94 ... discussion in the early part of this paper, we assume that the natural mortality rate for most years is at ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 63–77 : Auteur(s): Agnew, D.J., I. Everson, G.P. Kirkwood and G.B. Parkes

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

   catches made. An MP with control parameter values specified is proposed for implementation based on the ... the reference set of OMs (see Table A.4). 3. The TAC for the starting year 2007 (TAC2007) is set to ... years (i.e. 2008, 2009, etc. for year y’), the generated longline CPUE abundance indi- ces and longline ... longline catch landed early sel The longline selectivity function of the earlier years (1997–2002) of ... MP with control parameter values specified is proposed for implementation based on the results of ...

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

4. Factors to consider in developing management measures for krill

   Living Resources is given along with an outline of steps for the evolution of management procedures for ... Convention for the Conservation of Antarctic Marine Living Resources is given along with an outline of ... baleen whales in the Antarctic (Laws, 1977). The baleen whales were the object of major fisheries, with ... the area to which this Convention applies shall be conducted in accordance with the provisions of ... this Convention and with the following principles of conservation: (a) prevention of decrease in the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 175–187 : Auteur(s): de la Mare, W.K.

5. A composite recruitment index to describe interannual changes in the population structure of Antarctic krill at South Georgia

   target or station net hauls is described. This composite index is compared with an index where density ... %), while between 1994 and 1998 the number of 1+ krill found in the population increased with a very ... successful recruitment year due to krill spawned in 1994/95. File:  06watkins.pdf ... used four year classes with the mean size of l + krill occurring between 24 and 30 mm (Table 3 ... /98 Length-density plots for each cruise with the relative contributions of the different year ... the maximum permitted size (30 mm). Therefore all analyses were rerun using five year classes with a ... a good separation between the l + and 2+ krill sizes in any one year (with the exception of 1997 ...

   Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 71–84 : Auteur(s): Watkins, J.L

6. Comparison of two methods to assess fish losses due to depredation by killer whales and sperm whales on demersal longlines

   aimed at providing two indirect methods of assessment of depredated biomass over an 11-year period (2003 ... addition to providing a methodology that could be used in other areas with depredation issues, these ... communi- ties co-exist with elephants? A five-year case study in East Caprivi, Namibia. Biol. Cons., 93 ... loss d loss d j k l d B c c E c= å (3) where ( ) , ,j k lloss dB c equals the fish biomass lost ... estimates of fish biomass lost to depre- dation were then calculated by summing the results of equation 3 ... Cd: cells cd with available data in both absence and presence of odontocetes (equations 1, 2, 3, 4 ...

   Science Journal Paper : CCAMLR Science, Volume 22 (CCAMLR Science, Volume 22) : 1–14 : Auteur(s): Gasco, N., P. Tixier, G. Duhamel and C. Guinet

7. CPUE indices used in Soviet krill fishery statistics from 1977 to 1992 and their possible utility for evaluation of relative changes in krill biomass

   is diffi cult to trace the peaks associated with short hauls and low catches in Figures 3 and 4. At ... effort (CPUE) data from the early years of commercial krill fi shing operations in the Atlantic sector ... grouped by subarea, period, standard vessel type, selected year, selected month, areas of krill fl eet ... per vessel-days fi shed plus days with no actual catch due to stormy weather or absence of suitable ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 165–177 : Auteur(s): Litvinov, F.F., A.Z. Sundakov and V.I. Arkhipov

8. Performance and geometry of the FP-120 trawl used during UK fish stock assessment surveys around South Georgia, Subarea 48.3

   100 m, during operations with the 36/47 GOV trawl on the RV Argos. Later studies (e.g., Matuda et ... in 1992, the mini-transponder was lost on the first trawl on which it was deployed. Additionally ... achieved using a trawl with a high likelihood of FP-120 Trawl Performance and Geometry 44 42 40 38 36 ... (Figure 1) is known to be hard and uneven, thereby making bottom trawling difficult. Trawls with a high ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 51–69 : Auteur(s): Pilling, G. and G. Parkes

9. Status of krill target strength

   high signal-to-noise-ratio conditions, are consistent with the general pattern. Several specific ... -ratio conditions, are consistent with the general pattern. Several specific recommendations are made ... , 1972; MacLennan, 1990) has been applied to krill (Euphausia superba) in the Southern Ocean (Miller and ... theoretical computations, comparisons are made with data involving individuals, and recommendations are made ... from animals that are not acoustically resolved or separated, because of overlap with echoes from ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 101–126 : Auteur(s): Foote, K.G., D. Chu and T.K. Stanton

10. Target strengths of Antarctic krill (Euphausia superba)

    suspension lines, and (3) damage of the cage, with mass escape of krill, owing to a presumed collision or ... and Nakken 1972, Johannesson and Mitson 1983), knowledge of the target strength is essential. The ... fraught with errors and whose accuracy "is probably no better than ±1.4 dB" (Blue 1984). This figure is ... much inferior to that readily obtainable with standard spheres (Foote and MacLennan 1984, Robinson ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 265–279 : Auteur(s): Everson, I., D.G. Bone, J.L. Watkins and K.G. Foote

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