Résultats de la recherche

1. Survey design to estimate krill abundance during FIBEX

   methodology for assessing the abundance of krill. The survey design used in the southwest Atlantic study area ... of the FIBEX is described in this paper. Sampling involved the use of echo sounders for estimating ... sampling method was used. The survey was done in two phases. In the first phase a fairly evenly dispersed ... which are discussed. The analytical formulae for the analyses are also presented File:  05-Everson-et ... participate in the experiment. The coordinated multiship part of the study was scheduled to take 30 days. Two ... . Assuming that an unbiassed estimate of mean krill density can be obtained for each sampled transect, the ... design is capable of providing an unbiassed estimate of density for each stratum. 2. Stratification ... the use of echosounders for estimating krill abundance and also providing information on the size ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 253–263 : Auteur(s): Everson, I., I. Hampton and G.M. Jolly

2. Book review: Fish and Fish Resources of the Antarctic

   Antarctic bioresources, firstly by individual groups under the auspices of SCAR (Scientific Committee for ... Antarctic Research), and later, after the coming into force of the Convention on the Conservation of ... author believes that the most promising areas for future fishing are the two largest zones in terms of ... knowledge acquired by the author over a period of more than 30 years allowed lum to analyse both the ... for the future harvesting of fish stocks based on the fisheries potential of areas with high ... under the auspices of SCAR (Scientific Committee for Antarctic Research), and later, after the coming ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 165–168 : Auteur(s): Shust, K.V

3. Experimental evaluation of the effectiveness of weighting regimes in reducing seabird by-catch in the longline toothfish fishery around South Georgia

   for toothfish (Dissostichus spp.). Three regimes were examined, with weights of 4.25, 8.5 and 12.75 kg ... effects of different weighting regimes on the incidental mortality of birds caught on longlines fishing ... attached at 40 m intervals on a Spanish-rigged longline. There was a significant reduction in bird ... intervals should be used. Results suggested that seabird by-catch on lines using effective weighting regimes ... (cobbles) of an average weight of 4.25 kg. Two experiments were conducted: (i) a comparison of the use ... plunge from two or three metres above the surface of the water and remain submerged for several seconds ... which has participated in the longline fishery around South Georgia for the past several years, and ... problem, but whether it would be for other vessels in other areas might depend on the seabed substratum ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 119–131 : Auteur(s): Agnew, D.J., A.D. Black, J.P. Croxall and G.B. Parkes

4. Surface water circulation in krill fishing areas near the South Shetland Islands

   with a drogue attached at a depth of 30 m to assess flow patterns at the depth range where krill tended ... to be most abundant. The buoys were tracked using the ARGOS satellite positioning system. Based on ... Islands to the South Georgia and South Orkney Islands on a time scale of 110 to 120 and 85 days ... Orkneys for 20 days before drifting to South Georgia. Buoy 4, deployed in the shelf region, moved east ... currents which had properties of retention. In addition to positions of catches for the past 13 years ... at a depth of 30 m to assess flow patterns at the depth range where krill tended to be most abundant ... une ancre de cape situee a 30 m de profondeur, pour kvaluer les mouvements du courant dans ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 125–136 : Auteur(s): Ichii, T. and M. Naganobu

5. Optimization of survey sampling design in the detection of interannual variability and prey size selectivity in the diet of penguins

   results of a survey of prey size in Adélie penguins, sampling designs intended for the detection of inter ... inter-annual variation for mean prey size is fixed at 10%; the test power is taken as 0.9 and Type I ... and prey size selectivity in the diet of penguins Abstract / Description:  Based on the preliminary ... errors fixed at 0.1. Cost values of manpower required are based on Argentinian logistics. File:  34 ... colonies, etc. For Esperanza Base it was estimated on the basis of two people working for two and a half ... . Depending on methods, experience, etc, for Esperanza Base it was estimated based on two people working for ... 20 minutes; and the laboratory time was one person working for one hour to sort and clean the well ... interval for ai resulted in n=16. This value defines the size of sub-samples at the year level assuring ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 551–559 : Auteur(s): Marschoff, E. and B. Gonzalez

6. Spawning locations of mackerel icefish at South Georgia

   weak. Concentrations of larval icefish within Cumberland Bay are an order of magnitude higher than in ... :  Historical information on the distribution of spawning and larval mackerel icefish (Champsocephalus gunnari ... inshore spawning at South Georgia during April within and close to the bays on the north side of the ... following day, two on 20 March and 14 on 30 March. 011 5 April the catch was just three, and no further ... coast of South Georgia. Sampling was undertaken using an RMT8 at stations up to 20 k m from the mouth ... , spawning, South Georgia, CCAMLR INTRODUCTION Over the past 30 years there has been a fishery, large in ... on the shelf or close inshore along the north coast of South Georgia. Extensive year-round sampling ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 107–118 : Auteur(s): Everson, I., A.W. North, A. Paul, R. Cooper, N.C. McWilliam and K.-H. Kock

7. Evaluation of the results of trawl selectivity experiments by Poland, Spain and USSR in 1978/79, 1981/82 and 1986/87

   in 1978/79, 1981/82 and 1986/87 Abstract / Description:  Trawl selectivity for several species of ... rates and catch composition. Details of these data were analyzed and minimum mesh sizes for several ... species were calculated. It is recommended that introduction of these mesh sizes should be considered for ... 23.6 cm. Lso values of 30 cm for mesh size 124 mm (Table 9) and of 29.4 cm for mesh 110 mm (Table 11 ... Georgia. Fisch - Forsch., 20 (2): 49-53. KOCK, K.-H. 1981. Fischereibiologishe Uutersuchungen an drei ... ~ 28 ~ 27 + z 26 w -l I 25 (f) G: 24 + 23 22 20 22 24 26 28 30 32 34 MEAN FISH LENGTH ... z 2.6 0 f= u 2.5 w -l w 2.4 (f) +. 2.3 2.2 2.1 + 2.0 20 22 24 26 28 30 32 34 MEAN ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 163–196 : Auteur(s): Slosarczyk, W., E. Balguerias, K. Shust and S. Iglesias

8. Integration of CPUE data into assessments using the Generalised Yield Model

   / Description:  For the last three years, CCAMLR's Working Group on Fish Stock Assessment (WG-FSA) has ... the use of importance sampling, for incorporating information on trends in standardised CPUEs into GYM ... assessments. The use of the method is illustrated using data for Patagonian toothfish (Dissostichus ... into assessments using the Generalised Yield Model (GYM). In this paper, we propose a method, based on ... Group on Fish Stock Assessment (WG-FSA) has had available to it two indicators of stock status for ... year Y is the latest year for which we have data from the fishery, and simulation years Y+l to Y+P ... for fishable biomass, but in two years (1996 and 1997), they fall just outside. The second proposed ... terms of an application of importance sampling, and for providing guidance on appropriate diagnostics ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 65–74 : Auteur(s): Kirkwood, G.P. and A.J. Constable

9. Response to Everson (2008)

   ., 2001 for the CCAMLR- 2000 strata). Stratum biomass is determined from the mean transect density raised ... . Thus, there is no reason for the MaxEnt approach to ‘provide an estimate of stand- ing stock close to ... ). The survey SD reported by Heywood et al. (2006) is there- fore based on an n of 449 500, whereas the ... al., 2004), krill target strengths (TS) determined from an SDWBA model (Demer and Conti, 2005), and ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 195–198 : Auteur(s): Brierley, A.S., B.G. Heywood and S.F. Gull

10. Operational interactions of sperm whales and killer whales with the Patagonian toothfish industrial fishery off southern Chile

    industrial fishing vessels between April 2002 and March 2003. For the 180 hauls monitored, the evidence of ... support the hypothesis that the richest fishing grounds are also traditional feeding grounds for sperm ... 95% US$47 302–153 745) for the whole fleet, with a mean loss per set of US$138 (CI 95% US$74.76–249.3 ... eleginoides) fishery operations were assessed in southern Chile during surveys with observers on board ... Sep Oct Nov Dec Month S pe rm w ha le s (in di vi du al s) 0 10 20 30 40 50 60 70 ... 80 90 E ffo rt ( ha ul s ob se rv ed ) (a) 0 5 10 15 20 25 30 35 40 45 Jan Feb ... 20 30 40 50 60 70 80 90 E ffo rt ( ha ul s ob se rv ed ) (b) (a) (b) Hucke ... le ng th ( m m ) (a) y = 6.2936x + 173.06 R2 = 0.8552 0 5 10 15 20 25 30 40 50 60 70 ...

    Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 127–140 : Auteur(s): Hucke-Gaete, R., C.A. Moreno and J. Arata

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