Résultats de la recherche

1. A hypothetical life cycle for Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea region

   Paper Title:  A hypothetical life cycle for Antarctic toothfish (Dissostichus mawsoni) in the Ross ... of eggs and larvae over a 6–24 month period were investigated using an oceanic circulation model ... locations of toothfish larvae after an 18–24 month period were moderately consistent with the distribution ... probably remain in the northern area for 6–18 months before migrating back to the slope to regain condition ... , after reaching a length of about 15 cm, and an age of about 21 months, they become more benthic. For ... 70°S from December to May for all years and all vessels. Month G S I ( % ) 0 5 10 15 20 25 ... is mature at 100 cm (range 85–115 cm), which is equivalent to an age of 9–10 years (Dunn and ... adjacent slope areas. Fish mature at a length of 100–120 cm, at an age of 8–12 years, by which time they ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 35–53 : Auteur(s): Hanchet, S.M., G.J. Rickard, J.M. Fenaughty, A. Dunn and M.J. Williams

2. Is the attempt to estimate the biomass of Antarctic fish from a multi-species survey appropriate for all targeted species? Notothenia rossii in the Atlantic Ocean sector – revisited

   appropriate for all targeted species? Notothenia rossii in the Atlantic Ocean sector – revisited Abstract ... already heavily fished at the beginning of the 1970s. The closure of the fishery for this species in 1985 ... to provide more accurate estimates of the abundance of the species, it is suggested that an acoustic ... less than 20 min duration were disregarded. All survey data are held in the CCAMLR database. For ... , Hobart, Australia: 30 pp. Barrera-Oro, E.R. and R.J. Casaux. 1992. Age deter- mination of juvenile ... ° – 30 ° Fa lk la nd Is la nd s/ Is la s M al vi na s S ou th G eo rg ia E le ph an t ... ' –61°05' –61°10' –61°15' –61°20' –56°0' –55°30' –55°0' –54°30 ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 141–153 : Auteur(s): Kock, K.-H., M. Belchier and C.D. Jones

3. A statistical method for estimating the level of IUU fishing: application to CCAMLR Subarea 48.3

   , and confidence intervals for, fish and bird catches by IUU vessels. In order to estimate an IUU catch ... there must have been at least one encounter with an FPV in a year; no encounters in a year are ... with IUU fishing. The mean and variance of fish catch rate was calculated for each area and each year ... measures. Three years were analysed: 1998/99, 1999/2000 and 2000/01. Each year fully covered the period 1 ... encounter with an FPV in a year; no encounters in a year are interpreted as zero IUU fi shing. For each IUU ... actual FPV record for a year (October to September), an IUU cruise was randomly placed within the year ... variance of fi sh catch rate was calculated for each area and each year using reported catch and effort ... analysed: 1998/99, 1999/2000 and 2000/01. Each year fully covered the period 1 October to 30 September ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 119–141 : Auteur(s): Agnew, D.J. and G.P. Kirkwood

4. On the power to detect changes using the standard methods for monitoring parameters of predatory species

   Paper Title:  On the power to detect changes using the standard methods for monitoring parameters ... of predatory species Abstract / Description:  The CCAMLR guidelines (CCAMLR, 1989) for analyzing the ... considered here are insufficient for conducting power analyses (penguin arrival weight A1.1, trend in penguin ... population size A3.1, penguin demography A4.1, penguin fledging weight A7.1). Alternative forms for analyses ... ) to compute the requisite sample sizes for detecting changes of 10%, 20% and 30% of the mean value ... sample sizes for detecting changes of 10%, 20% and 30% of the mean values are shown in Table 2. No ... detect changes of 10%, 20%, and 30% of the mean values for Adelie and chinstrap meal size (Table 6 ... %) 119 96 72 46 2.48 (20%) 31 25 1 9 1 3 3.72 (30%) 1 5 1 2 9 7 For Cl = 0.10: 1.24 (10%) 99 79 57 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 377–397 : Auteur(s): Boveng, P. and J.L. Bengtson

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

   projections and the CCAMLR decision rules for Antarctic krill Abstract / Description:  The generalised yield ... model (GYM) was used by CCAMLR to establish the precautionary catch limit for the Antarctic krill ... natural mortality rate of 0.8 and recruitment variability generated using a Beta distribution for ... proportional recruitment of krill. In this study, krill sampling data for empirical size frequencies were ... years and CCAMLR criteria calculated both for any given year in all years, and for only the final year ... whether or not the population effects associated with the pro- posed catch are acceptable. For krill in ... both criteria are met is then used to calculate the precautionary catch used as an upper limit for ... with a model for population dynamics that extended an earlier dynamic model for fisheries management ...

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

6. Management and assessment options for the crab fishery around South Georgia

   for a conservative approach to management. Such an approach includes the use of catch/effort controls ... Paper Title:  Management and assessment options for the crab fishery around South Georgia Abstract ... / Description:  A new fishery for the lithodid crab, Paralomis spinosissima, started in Subarea 48.3 in 1992 ... . The fishery is also new to CCAMLR, both in terms of the species and fishing gear. We provide an ... and fishing gear. We provide an overview of the management options for crab fisheries in general and ... Convention point to the need for a conservative approach to management. Such an approach includes the use of ... aim to provide an overview of the management options for crab fisheries in general. We then ... exploitable part of the stock. The target for the Alaskan king crab is between 20 and 60% depending on ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 193–202 : Auteur(s): Basson, M. and D.D. Hoggarth

7. A compilation of parameters for ecosystem dynamics models of the Scotia Sea – Antarctic Peninsula region

   Paper Title:  A compilation of parameters for ecosystem dynamics models of the Scotia Sea ... assessment of methods for subdividing the precautionary catch limit amongst smaller spatial units. This paper ... compiles parameters for use in the ecosystem dynamic models that are needed to assess these methods. These ... parameters include life history and krill consumption parameters for the fish, whale, penguin and seal ... offspring produced per breeding adult per year. Derived krill demand estimates are for the adult portion ... mentioned in the text. Boundary area 1 Boundary area 2 Boundary area 3 5 Parameters for Scotia Sea ... P3). An arbitrary value was also used for the adult μ of chinstrap penguins. * , ,k j sQ for ... population structures in Croll and Tershy (1998) (Note P4). An arbitrary 1:1 sex ratio was assumed for the ...

   Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 1–25 : Auteur(s): Hill, S.L., K. Reid, S.E. Thorpe, J. Hinke and G.M. Watters

8. Factors to consider in developing management measures for krill

   / Description:  A brief review of the objectives of the Convention for the Conservation of Antarctic Marine ... Living Resources is given along with an outline of steps for the evolution of management procedures for ... Paper Title:  Factors to consider in developing management measures for krill Abstract ... MANAGEMENT MEASURES FOR KRILL W.K. de la Mare>l< Abstract A brief review of the objectives of the ... Convention for the Conservation of Antarctic Marine Living Resources is given along with an outline of ... are dependent on krill forms an integral part of objectives of the Commission for the Conservation of ... year to year. The various techniques used to estimate the abundance of animal populations also give ...

   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.

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

   for an interim approach to the setting of precautionary catch limits for this fishery. An approach ... Paper Title:  Towards the development of a management plan for mackerel icefish (Champsocephalus ... and research surveys leading to estimates of stock biomass. An extension of this scheme would use ... required for C. gunnari. File:  05agnew-etal.pdf ... therefore a need for an interim approach to the setting of precautionary catch limits for this fishery. An ... Sequence of Sampling, Analytical and Decision-making Processes The outline of an approach for using ... instance, M for the coming year could be assumed to be 'normal' unless there are indications that krill ... Tolerance (error) for determining F Time 0 L, K all sources of information would be used to review ...

   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

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

    Paper Title:  The gentoo penguin as a candidate species for the CCAMLR Ecosystem Monitoring ... supporting literature) that the gentoo penguin meets the specified criteria qualifying species for inclusion ... features of special relevance to the CEMP. File:  30-Croxall-and-Williams.pdf ... years at Bird Island, South Georgia and at the South Shetland Islands (both within Integrated Study ... WG-CEMP-90/14 THE GENTOO PENGUIN AS A CANDIDATE SPECIES ... FOR THE CCAMLR ECOSYSTEM MONITORING PROGRAM IP. Croxall and T.n. Williams* Abstract Based on ... penguin meets the specified criteria qualifying species for inclusion in the CEMP. The extensive ... suited for ecosystem monitoring were defined as: (i) specialist predators on the critical prey ...

    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

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