Résultats de la recherche

1. Myctophids in the diet of Antarctic predators

   predatory species are represented by 16 species of genera Krefftichthys (one species), Protomyctophum (four ... ) and two species of seals. Myctophids in the diet of predatory species are represented by 16 species ... calculations of prey consumption by populations of predators are desired. Since the time of these reviews ... composition of myctophids consumed by Antarctic predators is given in Table 2. Six species of myctophids have ... EATEN BY PREDATORS 3.1 Fish Three studies from the Indian Ocean sector and the South Shetland ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 335–368 : Auteur(s): Sabourenkov, E.

2. A first step towards modelling the krill–predator dynamics of the Antarctic ecosystem

   Antarctic is summarised briefly, and the central role played by krill emphasised. The background to the ... , whales, fish and krill in the Antarctic is summarised briefly, and the central role played by krill ... taken from the end of the 18th century, followed by whales at the start of the 20th century. More ... at South Georgia by 18221 (peaking in about 1800 when 112 000 skins were collected) and this ... for the sealers, and by 1830 the fur seal population there had also almost been exter- minated ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 217–277 : Auteur(s): Mori, M. and D.S. Butterworth

3. Effects of recruitment variability and natural mortality on generalised yield model projections and the CCAMLR decision rules for Antarctic krill

   model (GYM) was used by CCAMLR to establish the precautionary catch limit for the Antarctic krill ... 48.1, 48.2, 48.3 and 48.4) is limited by a trigger level of 620 000 tonnes until a procedure for ... criteria. From the early 1990s until 2009 the catch by the Antarctic krill fishery remained around 120 ... all areas regulated by CCAMLR is over 40 times the current catch (Nicol et al., 2012). Recent ... yield model (GYM) was used by CCAMLR to establish the precautionary catch limit for the Antarctic krill ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 81–96 : Auteur(s): Kinzey, D., G. Watters and C.S. Reiss

4. Sea-surface temperature and krill catches around South Georgia in December–February 1989–1991 and 1999–2001

   appraised by comparing them with krill catches obtained under various hydrological conditions. In comparison ... appraised by comparing them with krill catches obtained under various hydrological conditions. In ... could be verifi ed only by comparing forecasts with actual krill catches for a number of years. The ... guration of isotherms. The 0ºC isoline on maps of SST anomalies moved northward by 4–5° latitude from ... demonstrated by comparing maps of SST differences in January 2001 and January 1991 (Figure 2). In January ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 165–174 : Auteur(s): Vanyushin, G.P

5. Trends in population size and breeding success at colonies of macaroni and rockhopper penguins, Marion Island, 1979/80–1995/96

   success of macaroni penguins may be influenced by a wider-scale phenomenon than is applicable to ... macaroni penguins may be influenced by a wider-scale phenomenon than is applicable to rockhopper penguins ... various colonies suggest that this proportion may be influenced by environmental conditions before, or ... penguins from counts of breeders may be complicated by a variable annual proportion of breeders. For this ... al. success of macaroni penguins may be influenced by a wider-scale phenomenon than is the case ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 89–103 : Auteur(s): Cooper, J., A.C. Wolfaardt and R.J.M. Crawford

6. A von Bertalanffy growth model for toothfish at Heard Island fitted to length-at-age data and compared to observed growth from mark–recapture studies

   growth model. Formulae for adjusting predictions for bias imparted by the use of the Fabens model were ... imparted by the use of the Fabens model were developed and showed that the bias is relatively small for ... tted to length– age data obtained by sampling fi sh from hauls, measuring their length and then ... removing an oto- lith or other hard part in order to determine age by counting the number of annual growth ... estima- tion has been studied by Troynikov (1999), Lucena and O’Brien (2001), Taylor et al. (2005) and ...

   Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 43–66 : Auteur(s): Candy, S.G., A.J. Constable, T. Lamb and R. Williams

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

   exploitation rate (annual catch divided by biomass) of <7%, which is below the 9.3% level considered ... equivalent to a long-term exploitation rate (annual catch divided by biomass) of <7%, which is below the 9.3 ... Antarctic krill (Euphausia superba) in the Atlantic sector of the Southern Ocean and is managed by the ... are precautionary by the logic of Hewitt et al. (2002). The section headed ‘Is current management ... governing fisheries in the Southern Ocean, which are agreed by all Commis- sion Members, are set out in ...

   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

8. Intra-annual variability in the density of Antarctic krill (Euphausia superba) at South Georgia, 2002–2005: within-year variation provides a new framework for interpreting previous ‘annual’ estimates of krill density

   g m –2, SD = 24.3), but had risen substantially by summer in each year (mean = 89.5 g m –2, SD ... –2, SD = 24.3), but had risen substantially by summer in each year (mean = 89.5 g m–2, SD = 64.2). A ... not yet been possible to address in detail, by direct observation, variation in krill density on sub ... equations presented by Brierley et al. (2006) and Deines (1999) respectively. Both acoustic data streams ... by time to the acoustic backscatter data to give a virtual position for each observation ...

   Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 27–41 : Auteur(s): Saunders, R.A., A.S. Brierley, J.L. Watkins, K. Reid, E.J. Murphy, P. Enderlein and D.G. Bone

9. Bias in the estimation of krill yield from using a deterministic formulation of the median unexploited spawning biomass

   estimates of long-term precautionary yield currently adopted by CCAMLR for the krill fishery because the ... currently adopted by CCAMLR for the krill fishery because the level of escapement is the binding rule in ... median pre- exploitation spawning biomass, a problem noted and discussed by the authors. As a result ... corrected by dividing it by the value for escapement obtained when the projections are undertaken with ... (the number of determinations is able to be set by the user) (see Constable and de la Mare, 1996 for a ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 1–8 : Auteur(s): Constable, A.J. and W.K. de la Mare

10. Quantifying vessel performance in the CCAMLR tagging program: spatially and temporally controlled measures of tag-detection rates

    the rest of the fleet. The scaled number of tags recaptured by a given vessel (case) is divided by ... the number of tags recaptured by a subset of the data (con- trol). Scaling is carried out for each ... fishing event to account for the difference in the number of fish scanned by the case and the control ... calculation by using CCAMLR Science, Vol. 20 (2013): 73–80 73 QuantIfyIng vessel performance In the ccamlr ...

    Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 73–80 : Auteur(s): Mormede, S. and A. Dunn

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