Résultats de la recherche

1. A possible framework in which to consider plausible models of the Antarctic marine ecosystem for evaluating krill management procedures

   paper is concerned with conceptualising an element of the ecosystem to account for the varying qualities ... ecosystem for evaluating krill management procedures Abstract / Description:  CCAMLR is developing a ... management procedure for the krill fishery, including the evaluation of candidate management procedures in a ... framework for erecting such models. It discusses the general model requirements and presents a conceptual ... of an ecosystem-based management pro- cedure for krill (CCAMLR, 2001). This has entailed the ... life stage is most easily envisaged for animals moving from one age class to the next, as in an age ... conceptualising an element of the ecosystem to account for the varying qualities of data and knowledge and for ... model relationships. The fi rst stage in developing an ecosystem model for evaluating management ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 99–117 : Auteur(s): Constable, A.J

2. A simulation study of the method of deriving natural mortality rate using data for Champsocephalus gunnari in Subarea 48.3

   Paper Title:  A simulation study of the method of deriving natural mortality rate using data for ... been correctly chosen. Data for Champsocephalus gunnari in Subarea 48.3 are used to show that the ... mortality rates and fishing mortality rates for the oldest age group by fishing year are estimated by the ... Frolkina and Dorovskikh, 1990). Age composition of the catches, Ca.)!, for a series of years and ... annual fishing mortality Fay, and abundance Na,y rates by age and fishing year, where terminal fishing ... tuning algorithm; (iv) mean weighted values of annual fishing mortality, F y, for all age groups fully ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 69–83 : Auteur(s): Gasyukov, P.S. and R.S. Dorovskikh

3. The ecosystem approach to managing fisheries: achieving conservation objectives for predators of fished species

   fisheries impact incidentally on an ecosystem, (ii) what should be the conservation objectives for predators ... Paper Title:  The ecosystem approach to managing fisheries: achieving conservation objectives for ... in its infancy. A general approach is proposed for maintaining ecological relationships and providing ... for the recovery of depleted populations in food webs supporting fisheries. This paper addresses the ... of offspring (age 0) in that year (for simplicity below, recruitment is assumed to occur at end of ... inainmals - M AG Americas, 2000) Age at maturity (years) Plus class Natural mortality (year-]) Body ... 20-30 years, wl~ich is the critical period over which the system should not be irreversibly changed ... years (see text for details). Year Figure 7: Individual productivity for each predator in the trial ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 37–64 : Auteur(s): Constable, A.J

4. The 1991/92 fishery for Dissostichus eleginoides in Subarea 48.3

   Paper Title:  The 1991/92 fishery for Dissostichus eleginoides in Subarea 48.3 Abstract ... / Description:  The 1991/92 longline fishery for Dissostichus eleginoides in Subarea 48.3 was open from 4 ... Russian c 20 to 25 mm 120 cm 2400 - 4800 Russian d 20 to 25 mm 120 cm 13500 Russiane 25 to 30 mm 120 cm ... ler.gth (cm) 40 50 60 70 itl --l .r: ~ :J 0 (f) 80 90 100110120130140150160170180 Standard ... '0 250 .. .., 200 .0 E " 150 :z 100 50 0 40 50 60 70 80 90 100110120130140150160170180 ... 0 0 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 40 50 60 70 80 90 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 31–48 : Auteur(s): Agnew, D.J. and C.A. Moreno

5. Seabird interactions with longlining operations for Dissostichus eleginoides around South Georgia, April to May 1994

   albatrosses. The average mortality rate for the 20 sets was 0.48 birds/1 000 hooks and maximum mortality 3.12 ... Paper Title:  Seabird interactions with longlining operations for Dissostichus eleginoides around ... South Georgia, April to May 1994 Abstract / Description:  Longlining operations for Dissostichus ... eleginoides off South Georgia were assessed for incidental mortality and interactions with seabirds. Twenty ... each species in the vicinity of the ship was recorded every 30 minutes. Of the 20 sets for which ... albatrosses. The average mortality rate for the 20 sets was 0.48 birds/l 000 hooks and maximum mortality ... observed within 20 m of the vessel's stern. Observations were made for all setting periods. A streamer ... line was used for approximately six of the 20 sets and a noise-emitting scarer, based on regular or ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 111–121 : Auteur(s): Ashford, J.R., J.P. Croxall, P.S. Rubilar and C.A. Moreno

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

   Ocean bioregions: implications for conservation planning Abstract / Description:  Systematic ... conservation planning for developing marine spatial protection includes analysis of the spatial distribution of ... season, 64% of the CAMLR Convention Area was open to fishing for at least one species. There were ... distribution of catch within the open fraction. For example, only 26% of the total area open to krill fishing ... bioregionalisa- tion as an indicator of habitat, and catch data for Antarctic krill, Euphausia superba ... particular rel- evance for informing the review stage (step iii) of the SCP process detailed above. The ... ), pro- viding an up-to-date baseline against which new MPA proposals can be considered and the future ... management area does not provide long-term pro- tection equivalent to that of an MPA, or imply any form of ...

   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

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

   Paper Title:  Refinements to the strategy for managing depleted fish stocks based on CCAMLR ... hence that additional management policies are required for depleted stocks. The implications of these ... studies for defining the terms 'depleted' and 'target levels for recovery' are briefly ... been put into effect the target years for recovery become fixed at 20 and 30 years after the procedure ... distribution at year 20 is the sum of the projected distributions, for the set of current stock states in the ... Bertalanffy K = 0.12 year! Von Bertalanffy Woo = 2500 grams Age at first fishing = 5 years (knife-edge) Age ... at first spawning = 5 years (knife-edge) Pooled age-class = 20 years Higher yielding stock ...

   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

8. Line weights of constant mass (and sink rates) for Spanish system Patagonian toothfish longline vessels

   shaped steel weights weighing 5 kg would be an appropriate substitute for 8.5 kg rock weights ... Paper Title:  Line weights of constant mass (and sink rates) for Spanish system Patagonian ... hydrodynamically shaped (e.g. torpedo-shaped) steel weights, which are smaller for equivalent weight, and require ... no maintenance. An experiment was conducted on a Spanish-system longline vessel to determine the ... , which are smaller for equivalent weight, and require no maintenance. An experiment was conducted on a ... free-falls in the water column, and the latter pro- vides an estimate of sink rates in the linear ... ) was higher, suggesting that 5 kg steel weights would be an appropriate substitute for 8.5 kg rock ... the linear phases of sink profiles taken 20 s after deployment and are de- rived for a water depth of ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 93–106 : Auteur(s): Robertson, G., C.A. Moreno, E. Gutiérrez, S.G. Candy, E.F. Melvin and J.P. Seco Pon

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

   possible utility for evaluation of relative changes in krill biomass Abstract / Description:  Key catch-per ... and primary data for their calculations, were examined. The main CPUE indices were catch per vessel ... fluctuations in haul duration due to the different fishing strategies used when targeting krill intended for ... calculated for specific strategies were well correlated. Depending on the fishing strategy used, the number ... 0 2 4 6 8 10 12 14 16 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 Catch per vessel ... 1986 to 1991 (RIF statistics). 0 5 10 15 20 25 30 35 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ... 2 20 8 0. 19 80 25 0. 60 15 68 51 2 0. 81 15 76 0. 73 81 57 84 0. 88 91 ... 98 8 0. 17 67 14 40 5 0. 30 36 4 0. 17 13 11 14 1 0. 86 45 75 0. 55 80 36 ...

   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

10. The utilization of seabird censuses for krill monitoring

    Paper Title:  The utilization of seabird censuses for krill monitoring Abstract / Description ... correspondence analysis. Contour plotting, profile analysis and tests for equality of covariance matrices proved ... technique will allow the discrimination of krill levels by means of bird counts thereby providing an ... efficient tool for statistical tests of significance. The most promising approach seems to be the ... providing an efficient tool for statistical tests of significance. The most promising approach seems to be ... mentioned species are more or less suitable for direct observation, at the present state of the art it is ... test for multinormality, but will give an idea of the distributional· properties of data, which is ... programs for correspondence analysis are those published in Lebart, Morineau, Fenelon (1979). Other ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 393-425 : Auteur(s): Marschoff, E.R., J.G. Visbeek and L.R. Fontana

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