Результаты поиска

1. Standardization of fishing effort for Champsocephalus gunnari in the South Georgia area (Subarea 48.3)

   Paper Title:  Standardization of fishing effort for Champsocephalus gunnari in the South Georgia ... inflexible in its use of data types and has no estimate of accuracy. A standardized CPUE index for ... different classes (countries, types of vessel, fishing gear, months and years). Multiple regression is used ... the values selected to standardize the model. The mean coefficient of variation for the CPUE values ... WG-FSA-90/27 STANDARDIZATION OF FISHING EFFORT FOR ... effort for a number of years of fishing are used as additional information (Pope and Shepherd, 1985 ... category, one may calculate standardized values of catch-per-effort for a sequence of fishing years and ... data since 1981/82 could be used. However, it should be noted that for the first two years of this ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 327–336 : Автор(ы): Gasiukov, P.S.

2. A generalised model for evaluating yield and the long-term status of fish stocks under conditions of uncertainty

   known catch history and thus allow assessments of yield to be made for existing fisheries. An example is ... Paper Title:  A generalised model for evaluating yield and the long-term status of fish stocks ... projection model for assessing the long-term annual yield which satisfies objectives for the maintenance of ... biomass. The model provides a flexible method for assessing the influence of different patterns of growth ... ) 1.21 I 0 10 20 30 40 50 60 Length (mm) Selectivity (b) 1.6 1 1 0 2 4 6 Age (years) Relative ... of growth during the year); an age-selectivity function, a(a) (allows for a fishery that targets ... equation 12. This age structure is projected for a number of years, equivalent to at least the number of ... simulation for each gamma Years to project stock to remove effects of initial age structure Vector of real ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 31–54 : Автор(ы): Constable, A. and W.K. de la Mare

3. 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

   the regression-predicted within-year variation. Years that stand out for markedly low krill density ... South Georgia, 2002–2005: within-year variation provides a new framework for interpreting previous ... consistently over all three years, was detected. Krill densities in winter were predominantly low (mean = 18.7 ... /2000. Moored instruments provide valuable data that could be important for ecosystem-based management ... -predicted within-year variation. Years that stand out for markedly low krill density (i.e. densities below ... , timing and causes of intra-annual variability is thus an essential prerequisite for ecosystem ... management (Everson, 1992) and for understanding change on an interannual scale. Moored instrument arrays ... time-series of krill density at 30-minute intervals for both the on- shelf and off-shelf mooring. For ...

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

4. Investigations of required sampling regimes for environmental parameters

   Paper Title:  Investigations of required sampling regimes for environmental parameters Abstract ... monthly mean temperature over two years with a significance α of 0.05 and a power P of 0.8. Sampling wind ... speed continuously or as daily maxima and minima would be sufficient to detect a 10 to 20% change in ... detection Wind speed daily multiple n=8 per day 10-20% High recording for one month daily multiple n-30 ... ------'~-------"--~--~------~ o 1 0 20 30 days Figure 2: Maximum daily pressure for January 1985, Davis Station, showing the ... ~--~.-------.---~-'--------~ 5 10 15 20 25 30 35 days Figure 4: Daily wind speed by three hour sampling period for January 1985 ... temperatures in that 563 year were lower than for the other two years (see Figure 1). Maximum and minimum ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 561–573 : Автор(ы): Agnew, D.J.

5. Potential nursery areas for fish in the Prydz Bay region

   break. The dominant size class was of 45 mm standard length, which corresponds to an age of 1 ... Paper Title:  Potential nursery areas for fish in the Prydz Bay region Abstract / Description:  A ... for the shelf area of the Bay to be a nursery ground for nototheniid and channichthyid fish. Nearly ... antarcticum. This species was abundant (up to 9 100 were caught in a 30 minute haul) especially near the shelf ... standard length, which corresponds to an age of 1+. Nototheniids and channichthyid juveniles were much ... 7 to 8 m high, and nets were towed at fishing depth for a standard haul duration of 30 minutes at 3 ... . antarcticum catches. 375 -64 individuals/30 minute trawl 1 5 0 10 0 20 0 Q) "Cl 0 B 30 :;l ... . 377 -64 individuals/30 minute trawl 1 5 0 10 0 0 Cl) 20 -d 0 E 000 0 30 0 :.;::l 0 .s ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 369–380 : Автор(ы): Williams, R.

6. Exploratory fishing for Dissostichus spp. in the Antarctic region (Subareas 48.1, 48.2 and 88.3)

   Paper Title:  Exploratory fishing for Dissostichus spp. in the Antarctic region (Subareas 48.1 ... system) were used for the operation, with variable quantities of fish hooks (1 440 to 4 320), No. 9 ... /hook (Subarea 88.3), 19.1 g/hook (Subarea 48.1) and 3.0 g/hook (Subarea 48.2), and an average over all ... occurs. The search for new fishing areas will have an impact on present and future fisheries for D ... of males ranged between 37 and 142 cm, with an average of 78.5 cm (SD = 25.1), while for females it ... for both sexes. This gives an average yield of 59% for the HGT product. With the maturity scale ... general similar to those reported for other regions. Concerning the biological aspects, an allometric ...

   Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 1–17 : Автор(ы): Arana, P.M. and R. Vega

7. 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 : Автор(ы): Constable, A.J

8. 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 ... Frolkina and Dorovskikh, 1990). Age composition of the catches, Ca.)!, for a series of years and ... mortality rates and fishing mortality rates for the oldest age group by fishing year are estimated by the ... tuning algorithm; (iv) mean weighted values of annual fishing mortality, F y, for all age groups fully ... =e {.y- an .

   for a> 0, Wa,y = WO,y = wl/2,y for a ...

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

9. 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 ... 20-30 years, wl~ich is the critical period over which the system should not be irreversibly changed ... 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 ... 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 : Автор(ы): Constable, A.J

10. 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 : Автор(ы): Agnew, D.J. and C.A. Moreno

Страницы