Résultats de la recherche

1. Alternative methods for determining subarea or local area catch limits for krill in Statistical Area 48

   application in future of precautionary limits to subareas or local areas of this area. Nine alternative ... methods of determining subarea or local area krill catch limits are evaluated relative to six criteria: (i ... ) the degree to which information on biological relationships is considered; (ii) the cost of data ... collection; (iii) the reliability of required information; (iv) the ease of enforcement; (v) the effects on ... (Euphausia superba) in Statistical Area 48. The measure also implies an application in future of ... precautionary limits to subareas or local areas of this area. Nine alternative methods of detennining subarea ... information on biological relationships is considered; (ii) the cost of data collection; (iii) the ... reliability of required information; (iv) the ease of enforcement; (v) the effects on current fishing ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 237–249 : Auteur(s): Watters, G. and R.P. Hewitt

2. Trawl bag selectivity in the Champsocephalus gunnari fishery

   :  Experiments on trawl bag selectivity during fishing on pre-spawning concentrations of Champsocephalus gunnari ... were carried out in June 1990 in the South Georgia area concurrently with trawl surveys as part of the ... and the selectivity factor was 3.10 for a mesh size of 80 mm. Comparison of these results with results ... cm) as well as earlier sexual maturation of fish were noted. It was suggested that the use of Polish ... los mecanismos de este proceso. 1. INTRODUCTION Results of experiments on trawl bag selectivity in ... selectivity during fishing on pre-spawning concentrations of ChampsocephaZus gunnari were carried out in June ... 1990 in the South Georgia area concurrently with trawl surveys as part of the main biological and ... was 3.10 for a mesh size of 80 mm. Comparison of these results with results from previous years ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 295–312 : Auteur(s): Bidenko, V.G. and I.G. Istomin

3. Seabird interactions with trawl and longline fisheries for Dissostichus eleginoides and Champsocephalus gunnari

   and Champsocephalus gunnari Abstract / Description:  The behaviour of seabirds and the rate of ... trawlers was of white-chinned petrels, with a lesser mortality of albatross species. Mortality rates ... , probably because the birds at the former site are distracted from the longlines by the discharge of offal ... from the side of the vessel opposite to where the longline is set.   File:  06williams-capdeville.pdf ... of seabirds and the rate of incidental mortality were observed during commercial trawling operations ... associated with both longliners and trawlers was of white-chinned petrels, with a lesser mortality of ... longlines by the discharge of offal from the side of the vessel opposite to where the longline is set. Le ... ceja negra (Diomedea melanopkris) y gaviotas dominicanas (Larus dominicanus). Los petreles de ment6n ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 93–99 : Auteur(s): Williams, R. and D. Capdeville

4. Refinements to the strategy for managing depleted fish stocks based on CCAMLR objectives

   objectives Abstract / Description:  A method of calculating fishing mortalities which will allow depleted ... decades is illustrated. These fishing mortalities are based on probabilistic descriptions of the future ... states of a depleted stock, and take into account uncertainty in assessments. Sample calculations show ... that applying a policy of F 0.1 will not always lead to stock recovery in two to three decades, and ... A method of calculating fishing mortalities which will allow depleted fish stocks to recover to ... fishing mortalities are based on probabilistic descriptions of the future states of a depleted stock ... , and take into account uncertainty in assessments. Sample calculations show that applying a policy of ... management policies are required for depleted stocks. The implications of these studies for defining the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 467–475 : Auteur(s): de la Mare, W.K. and A. Constable

5. The fishery for Patagonotothen brevicauda guntheri in CCAMLR Subarea 48.3

   / Description:  Fine-scale data supplied to CCAMLR for 1987/88 showed that the catches of P atagonotothen ... only ever caught at Shag Rocks. Therefore the South Georgia catches were almost certainly of another ... species. The small size of P.b. guntheri means that they can only be caught with net meshes so small that ... they would also catch undersized individuals of other, larger species. Survey results suggest that such ... CCAMLR for 1987/88 showed that the catches of Patagonotothen brevicauda guntheri were five times greater ... . Therefore the South Georgia catches were almost certainly of another species. The small size of P.b ... individuals of other, larger species. Survey results suggest that such fishing is likely to have a ... significant effect on other species. P.b. guntheri has been reported as a by-catch of other fisheries; this ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 275–283 : Auteur(s): Everson, I. and C. Mitchell

6. Length-based assessment for mackerel icefish (Champsocephalus gunnari) at South Georgia

   accurate identification of age cohorts from the survey data. In this paper a length-based approach is ... described that removes the problem of cohort determination. A bootstrap technique (consistent with the ... current CCAMLR approach) is used to estimate the length distribution of the population from the survey ... data which, in conjunction with the bootstrapped survey biomass data, yields an estimate of the ... ,*, C.T.T. Edwards1,2, R.E. Mitchell2 and D.J. Agnew2 1 Fisheries Group Division of Biology Imperial ... (TAC). One issue is the accurate identification of age cohorts from the survey data. In this paper a ... length-based approach is described that removes the problem of cohort determination. A bootstrap ... technique (consistent with the current CCAMLR approach) is used to estimate the length distribution of the ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 129–137 : Auteur(s): Hillary, R.M., C.T.T. Edwards, R.E. Mitchell and D.J. Agnew

7. Krill biomass assessment in Statistical Area 48 from the RV AtlantNIRO data - Autumn 1989/90

   Islands was assessed at 3.8 million tonnes, most of which was concentrated in the waters of the Weddell ... Sea. In contrast to this site, the one off the South Orkney Islands is well-established in terms of ... tonnes. Most of this stock was concentrated in the south-western part of the Coronation Island shelf ... , most of which was concentrated in the waters of the Weddell Sea. In contrast to this site, the one ... off the South Orkney Islands is well-established in terms of both research and commercial harvesting ... . The overall krill stock here was estimated to be 1.1 million tonnes. Most of this stock was ... concentrated in the south-western part of the Coronation Island shelf. Resume En mars/avril 1990, une ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 115–121 : Auteur(s): Fedotov, A.C.

8. Assessment and tag program adaption methods for exploratory fisheries in the CAMLR Convention Area: an example application for Division 58.4.3a

   initial stock assessment and adaption of catch limits and tagging rates is presented for new and ... tagging levels that will produce an expected abundance estimate in the following year of a given precision ... whilst ensuring the sustainable exploitation of the stock as per the CCAMLR management procedure. The ... combination of the assessment and tagging rate adaption methods can then form the basis of an early management ... exAmple AppliCAtion for division 58.4.3A R.M. Hillary Division of Biology Imperial College London SW7 ... assessment and adaption of catch limits and tagging rates is presented for new and exploratory stocks in the ... will produce an expected abundance estimate in the following year of a given precision whilst ensuring ... the sustainable exploitation of the stock as per the CCAMLR management procedure. The combination of ...

   Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 101–113 : Auteur(s): Hillary, R.M

9. International CCAMLR applied research and monitoring program, Prydz Bay priority area

   area Abstract / Description:  An outline is given of a proposed scientific research contribution by ... Australia towards the first five years of an International CCAMLR Applied Research and Monitoring Program in ... the Prydz Bay area. Emphasis is placed on the krill based part of the marine community in the Prydz ... Bay area. Some attention is also given to the fish and squid based part of the marine community on the ... RESEARCH AND MONITORING PROGRAM, PRYDZ BAY PRIORITY AREA Australia Abst ract An outline is given of ... a proposed scientific research contribution by Australia towards the first five years of an ... the krill based part of the marine community in the Prydz Bay area. Some attention is also given to ... the fish and squid based part of the marine community on the Kerguelen Plateau. PROGRAMME ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 283-295 : Auteur(s): Australia

10. Toothfish, Dissostichus eleginoides, at South Georgia

    , paragraph 106). Histological examination of the gonads of a small sample of fish taken from a commercial ... longliner in January 1990 indicates that the fish are sexually mature and, at the time of sampling, are ... examination of the gonads of a small sample of fish taken from a commerciallongliner in January 1990 ... indicates that the fish are sexually mature and, at the time of sampling, are approaching spawning ... pesqueri'a de Dissostichus eleginoides en Georgia del Sur ha aumentado considerablemente en los ultimos ... afios. Se ha sostenido que los peces capturados son senescentes, y por 10 tanto no forman parte de la ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 255–261 : Auteur(s): Everson, I. and S. Campbell

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