Resultados de la búsqueda

1. Krill biomass in Area 48 and Area 58: recalculations of FIBEX data

   3S'W 30'W 2S'W 20'W 1S'W r-------------------------~------------~------t_SO'S ...... 00 '1 ... ) 30'W 2S'W 20'W Figure 1: FIBEX survey areas and CCAMLR statistical sub areas in the West Atlantic ... -- --, ",,' -j 20'[ 30'[ .to'[ 50'E Agu(hos, Norlon DuPresne, Kalyo Noru and Nel 10 Don HERCATOR ... ~--~--~--~--~--~----~--~--~--~~ 20 25 30 35 40 45 50 55 60 65 70 Length (mm) Figure 3: Relationship between krill target strength ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 157–181 : Autor(es): Trathan, P.N., D.J. Agnew, D.G.M. Miller, J.L. Watkins, I. Everson, M.R. Thorley, E. Murphy, A.W.A. Murray and C. Goss

2. A simple approach for calculating the potential yield of krill from biomass survey results

   median pre-exploitation level over a 20 year period of harvesting should equal 10%. The value of, λ ... for the calculations is that the probability that the krill spawning biomass drops below 20% of its ... the following 20 years, is that from a single pre-exploitation biomass survey. No account is taken of ... -exploitation level over a 20 year period of harvesting should equal 10%. The value of 'A, depends strongly on ... size drops below 20% of its average value prior to exploitation, over a 20 year period of harvesting ... DYNAMICS MODEL . The numbers of lain of age a years at the start of "year" y (Ny,a) are governed by the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 207–217 : Autor(es): Butterworth, D.S., A.E. Punt and M. Basson

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

   ) 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 : Autor(es): Boveng, P. and J.L. Bengtson

4. Some thoughts on precautionary measures for the krill fishery

   spawning biomass dropping below 20% of its pre-exploitation median level over a 20-year harvesting period ... is 10%; and the median krill escapement1 in the spawning biomass over a 20-year period is 75% of ... , leading to more precise conservation measures. Article I1 of the CCAMLR Convention requires that ... /81 season, over a decade ago, which means that with a lifespan of five to seven years, at least two ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 1–11 : Autor(es): Everson, I. and W.K. de la Mare

5. A review of the diet and at-sea distribution of penguins breeding within the CAMLR Convention Area (submitted to the 2008 Joint CCAMLR-IWC Workshop)

   does cause birds distress, and in exceptional cases results in death of a study animal, but it is ... N15 gives an indication of the trophic level at which an animal feeds, while δC13 indi- cates primary ... months or years and feathers the period prior to moult. Biodegradable samples (blood or flesh) need to ... be stored in 70% alcohol or frozen at –20°C, but feathers, toenails, eggshell and bone require no ...

   Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 75–114 : Autor(es): Ratcliffe, N. and P. Trathan

6. Seabird interactions with longlining operations for Dissostichus eleginoides at the South Sandwich Islands and South Georgia

   INTRODUCTION In recent years, decreases in populations of several species of Southern Ocean albatrosses ... saving of $A4.9 million and 30 300 albatrosses annually. The Japanese tuna fishery is in the process ... TwineTM #20. Eyeless hooks of size #26 MarutoTM (28 mm) were tied to the free ends of the secondary ... coils, each coil 75 m long with 30 to 38 hooks, giving a total length of main line of 22 500 m and a ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 143–153 : Autor(es): Ashford, J.R., J.P. Croxall, P.S. Rubilar and C.A. Moreno

7. Sensitivity investigation of the SDWBA Antarctic krill target strength model to fatness, material contrast and orientation

   study, the SDWBA TS pattern and frequency response behaviours at standard survey frequencies and animal ... the distribution of animal orientations. Due to the high variability of TS to realistic changes in ... 1 15 1. 15 0. 29 3 0. 36 2 20 1. 2 0. 31 9 0. 39 4 30 1. 3 0. 37 4 0 ... ) and standard deviation (5, 10, 20 and 30 degrees) of the Gaussian distribution of orientation. It ... and animal lengths are explored via a sensitivity analysis of some important parameters: number of ... seawater and the distribution of animal orientations. Due to the high variability of TS to realistic ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 97–122 : Autor(es): Calise, L. and G. Skaret

8. Management and uncertainty: the example of South Georgia

   present M=O.ll, F=0.65. Annual recruitment, as numbers at 3 years old, has fallen from some 20 ... ages over 10 years and 19% over 20 years. The short lived fish were mostly small fish like anchovy ... , and that the sustainable yield is small. A long period of protection, perhaps 20 years, would be ... 2,500 Duration of closure 5 years 10 years 20 years Transitional yields (next 10 years) 25-:40,000 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 341-353 : Autor(es): Gulland, J.A.

9. Acoustic estimates of krill density at South Georgia, 1981 to 1998

   from year to year over that time, ranging from ≈ 2 to  ≈ 150 g m-2 (fresh mass). The 1982, 1991 and ... Acoustic surveys at South Georgia over the past 20 years suggest that krill density around the island ... years; by convention the year given refers to the year in which the season ended) BAS has conducted ... years ,90' ,982 ,9i5 ,pB ,9+ ,9s6 $6' 40% ,989 ,99' ,992 ,9@ ,9qb ,9qb ,9q6 ,992 49% Year Figure 2 ... given year is less than p - o for all years, then the year in Acoustic estimates of krill density ...

   Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 47–57 : Autor(es): Brierley, A.S., J.L. Watkins, C. Goss, M.T. Wilkinson and I. Everson

10. An assessment of toothfish in Subarea 48.3 using CASAL

    years refer to the fishing season that started in December prior to the year quoted. For example, year ... spawning take place, lasted from 1 May to 31 August. The remainder of the year (1 September to 30 ... l and year y, the CV-at-length across years (cvl) of the proportions-at-length can be estimated by ... measurements of the catch weighted by catch size. In the early years (1985–1995) only fleet-based ...

    Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 65–95 : Autor(es): Hillary, R.M., G.P. Kirkwood and D.J. Agnew

Páginas