Resultados de la búsqueda

1. Seabird mortality in the Patagonian toothfish longline fishery around Crozet and Kerguelen Islands, 2001–2003

   killed species, with males being more frequently caught than females. Grey petrels (Procellaria cinerea ... baited longlines. Based on the results of this analysis, several recommendations are made with the aim of ... petrels and grey petrels is explained by the time of year, geographical area and type of longliner (manual ... the years considered, vessels using man- ual baiting had a lower by-catch rate than those using ... years. The quantity of discarded offal affected the mortality of white-chinned petrels, with more ... vessels was very heterogeneous according to the year, the EEZ and the month, with fi shing pressure much ... the year, although it does vary considerably between months and be- tween years. Overall, fi shing ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 53–80 : Autor(es): Delord, K., N. Gasco, H. Weimerskirch, C. Barbraud and T. Micol

2. Factors that may influence the accuracy of abundance estimates from CCAMLR tag-recapture programs for Dissostichus spp. and best practice for addressing bias

   features in common with the simplest form of an abundance estimator, known as the Lincoln- Petersen ... with respect to M, R and C. Where these assumptions are not met, parameter estimates may be biased ... the true N by the estimate N̂ (i.e. N̂ N> or N̂ N< ), with potential consequences for any ... management advice based on these estimates. To assist with assessing the impact of bias in estimating ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 63–72 : Autor(es): Welsford, D.C. and P.E. Ziegler

3. The Patagonian toothfish (Dissostichus eleginoides) fishery in the Kerguelen Islands (Indian Ocean sector of the Southern Ocean)

   eleginoides) have been fished in the Kerguelen Islands zone for 20 years, firstly with trawlers and more ... recently with longliners. This is the oldest fishery targeting D. eleginoides in the Indian Ocean sector of ... the Kerguelen Islands zone for 20 years, firstly with trawlers and more recently with longliners ... phase, when fishing effi- ciency would have increased (first 2–3 years), a phe- nomenon of partial ... ratio decreases with the years, which shows that the average size of the fish caught is smaller ... maturity stages during the year was studied to determine the spawning period. Mature animals (stages 3 to ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 1–25 : Autor(es): Lord, C., G. Duhamel and P. Pruvost

4. An alternative method for estimating the level of illegal fishing using simulated scaling methods on detected effort

   is less than, or equal to, the precautionary assessment with some given level of confidence (for ... estimating the level of illegal fi shing Figure 3: Ten illegal fi shing cruises with different levels of ... precautionary assessment with some given level of confi dence (for example 80%). Résumé Le présent document ... modelling framework of this paper, particularly with regard to the behaviour of vessels when detected ... observation of illegal fi shing effort coupled with the pattern of fi shery patrols is the main input data ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 143–161 : Autor(es): Ball, I

5. Prey monitoring surveys: a discussion of the characteristics necessary in prey surveys

   with the total prey available as a significant amount, perhaps even all of the prey may be beyond ... these are listed in Table 1 along with comments regarding the implied requirements for prey surveys ... . Three of the parameters (foraging trip - 379 - duration, chick fledging weight and chick diet ... ) and breeding success, are therefore not suitable for comparison for interpretative purposes with ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 377-391 : Autor(es): Everson, I.

6. Detection and quantitative estimation of krill concentrations by hydroacoustic instruments

   in areas surveyed. The task of detecting surface concentrations of krill can be solved with the help ... FIBEX program. It was shown that the hydroacoustic device Simrad SK-120, with TVG switched off, is ... detecting surface concentrations of krill can be solved with the help of towed acoustic antennae. The ... shown that the hydroacoustic device Simrad SK-120, with TVG switched off, is capable of registering ... . Investigations over many years have proved that krill disperses extremely non-uniformly over vast areas in the ... eddies, with certain oxygen, silicon, phosphorus concentrations and other hydrological conditions. Such ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 123-139 : Autor(es): Yudanov, K.I.

7. Investigations of required sampling regimes for environmental parameters

   monthly mean temperature over two years with a significance α of 0.05 and a power P of 0.8. Sampling wind ... and pressure. Sampling daily maxima and minima would be sufficient to detect a 2 to 3°C change in ... minima would be sufficient to detect a 2 to 3°C change in monthly mean temperature over two years with a ... later months, when temperature starts falling rapidly, a mean temperature of ±3°C would be the smallest ... conditions between years (Le., changes in the parameters of the stated magnitudes could be detected with ... 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 : Autor(es): Agnew, D.J.

8. Marine mammals and demersal longline fishery interactions in Crozet and Kerguelen Exclusive Economic Zones: an assessment of depredation levels

   whales. These two species, alone or in co-occurrence with each other, were observed in 71% of the 1 308 ... two species, alone or in co-occurrence with each other, were observed in 54% of the 6 262 longlines ... small number of individual killer whales were responsible for most of the interactions with the fishery ... . In the Kerguelen EEZ only sperm whales, alone or in co-occurrence with fur seals, were found to ... , C.A. and R.S. Henderson. 1972. Report of Project Deep Ops: Deep object recovery with pilot and ... sperm whales (Physeter macrocephalus) with a longline fi shing vessel. Mar. Mamm. Sci., 16 (3): 685 ... operated all year round, with the exception of February in the Kerguelen EEZ when the fi shery was closed ... or in co-occurrence with each other, were observed in 71% of the 1 308 longlines set. In the ...

   Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 67–82 : Autor(es): Roche, C., C. Guinet, N. Gasco and G. Duhamel

9. On the instantaneous natural mortality rate of Champsocephalus gunnari, South Georgia (Subarea 48.3)

   composition of catches from 1964/65 to 1968/69 and the age/length key for the first half of 1972 were used in ... first half of 1972. Length Age group (cm) 1 2 3 4 5 6 7 8 9 10 16-17 15 0 0 0 0 0 0 0 0 0 18-19 ... 1968/69 and the age/length key for the first half of 1972 were used in the calculations. The results ... /65 a 1968/69 et de la cle ages/longueurs pour la premiere moitie de 1972. Les resultats ont offert ... cocTaBY 3a 1964/65 - 1968/69 rr. H pa3MepHO-Bo3pacTHbIe KJlI01.IH 3a nepBYIO nOJlOBHHY 1972 r. B ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 313–326 : Autor(es): Frolkina, G.A. and R.S. Dorovskikh

10. Mesopelagic fish of the Southern Ocean - summary results of recent Soviet studies

    these species are summarized in tables with details on area, season and source of data. Some data, e.g ... . Age of maturity is 2 to 3 years (Shust and Kochkin, 1985). Sex ratio is about 1:1 with a slightly ... mesopelagic fish in Antarctic waters published in the last 5 to 7 years. The paper deals specifically with ... 4 to 5 years. Age of maturity is 2 to 3 years (Shust and Kochkin, 1985). Length at maturity L50=8.6 ... to 3 mm and 0.7 to 1.0 g (P=0.01). Maximum reported length was 10.5. Maximum age is 4 to 5 years ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 433–457 : Autor(es): Sabourenkov, E.N.

Páginas