Résultats de la recherche

1. Response to Everson (2008)

   krill in the southwest Atlantic has been estimated as 109.4 million tonnes with a standard deviation ... TS values, in a Bayesian Maximum Entropy (MaxEnt)-based image-reconstruction framework (e.g ... wrong’ with either or both methods, and has implied that since, in his opinion, the MaxEnt approach is ... , particularly in the ways in which SD is calculated, and it is essential that these differences be considered ...

   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

2. Preliminary analyses of data collected during experimental phases of the 1994/95 and 1995/96 Antarctic crab fishing seasons

   regressions were probably a result of small catches, inter-haul variability in CPUE, and crab movement and ... their release sites. Density estimates from the mark-recapture data were in the order of 50 000 to 100 ... estimates. In general, the experimental harvest regime was successful. The regime provided important ... information about crab distribution and facilitated evaluation of local depletion estimators for use in stock ... extended (in a slightly revised format) for another three f ishing seasons (to the 1997/98 split-year ... . spinosissima, a number of interesting points can be raised from the results presented in Figure 3. First ... on 20 November, 1995. During this period, the vessel hauled 79 strings of gear which were set in ... insignificant regressions were probably a result of small catches, inter-haul variability in CPUE, and crab ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 141–159 : Auteur(s): Watters, G

3. 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 ... krill abundance as well as collection of data on the size, density and distribution of krill swarms. In ... also collected. The study area was subdivided into several geographically distinct subareas in each of ... participate in the experiment. The coordinated multiship part of the study was scheduled to take 30 days. Two ... to achieve the maximum of survey time in the total available time (about 30 days) each Chief ... of krill. The survey design used in the southwest Atlantic study area of the FIBEX is described in ... collection of data on the size, density and distribution of krill swarms. In addition, information on ...

   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

4. Biology and harvesting of Dissostichus eleginoides around the Kerguelen Islands (Division 58.5.1)

   species in the fisheries of the Southern Ocean. In Division 58.5.1, a directed trawl fishery has been in ... operation since 1984/85 and has expanded in the deep western sector of the Kerguelen Shelf. This fishery ... from year to year and highly dependent on the harvestable resources of Champsocephalus gunnari. Vital ... biological information on population dynamics, as well as demographic structures and trends observed in an ... (Division 58.5.1) for each split-year since 1984/85. The hauls in which Dissostichus eleginoides was ... 58.5.1). () percentage of total fishing effort. Years in which Champsocephalus gunnari was targetted are ... is becoming an increasingly important species in the fisheries of the Southern Ocean. In Division ... 58.5.1, a directed trawl fishery has been in operation since 1984/85 and has expanded in the deep ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 85–106 : Auteur(s): Duhamel, G.

5. Fishing for toothfish using pots: results of trials undertaken around South Georgia, March–May 2000

   commercial viability of this fishing method for toothfish fisheries in the CCAMLR Convention Area. While the ... toothfish was notably lower than that achieved in the longline fishery. Importantly, the use of pots ... Pilling et al. predation, a major problem in certain areas, (2000b), which brings together the result of ... . A drawstring held the bottom mesh together in the middle. This allowed pots to be emptied easily ... toothfish fisheries in the CCAMLR Convention Area. While the method successfully caught D. eleglnoidcs ... achieved in the longline fishery. Importantly, the use of pots eliminated bird by- catch. To capitalise on ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 93–105 : Auteur(s): Agnew, D.J., T.M. Daw, G.M. Pilling and M.G. Purves

6. Joint Polish/American hydroacoustic survey of Elephant Island and the vicinity of King George Island, 1988

   in most areas covered by last year’s survey. The total biomass in the vicinity of Elephant Island was ... estimated from 120 kHz data to be 260k tonnes and that in the Bransfield Strait south of King George Island ... was 39k tonnes for a total of 299k tonnes in the combined areas. The estimated 200 kHz survey data ... were higher, giving 715k tonnes near Elephant Island and 83k tonnes in the Bransfield Strait. The ... the areas surveyed last year. The full survey found (120 kHz data) 385k tonnes (in 7 787 n miles2 ... year and closer to the estimates observed in 1984 in this area, i.e. a low density. The results from ... parameters of the systems used. 4. DISCUSSION The survey in areas covered last year were very comparable ... -year variation in the abundance and distribution of Antarctic krill (Euphausia superba) near Elephant ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 357–377 : Auteur(s): Macaulay, M.C.

7. Use of the Leslie stock depletion model for the assessment of local abundance of Patagonian toothfish (Dissostichus eleginoides)

   used to examine local patterns in catch per unit effort (CPUE) in the longline fisheries for Patagonian ... presents a re-working and synthesis of previous analyses to examine whether declines in CPUE can be ... in localised areas for periods of at least three days. The results suggest that there is greater ... potential for application of the model in some areas than in others, but in general there is no sufficiently ... selected from the North and Rhine Banks respectively in that year (see SC-CAMLR, 1993 - Figure 4). The ... from Subarea 48.3 and adjacent waters. These estimates were, in some years, substantially different ... on the target species is difficult to assess, particularly in the early years of the fishery when ... fishery in Subarea 48.3 include a lack of detailed data from the early years of the fishery, differences ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 55–77 : Auteur(s): Parkes, G., C.A. Moreno, G. Pilling and Z. Young

8. Distribution and population structure of Dissostichus eleginoides and D. mawsoni on BANZARE Bank (CCAMLR Division 58.4.3b), Indian Ocean.

   of antifreeze in the former species. Dissostichus eleginoides showed a resting stage in sexual ... maturity, while D. mawsoni was in developing condition. In D. mawsoni, small fish contributed a very low ... latitudinal patterns in sexual maturity and size composition. The study indicates that the management of ... 500 1000 1500 2000 0 10 20 30 500 1000 1500 2000 0 10 20 30 500 1000 1500 2000 In di v.  10 ... eleginoides was mainly caught in shallower areas (<1 000 m), centred at approxi- mately 58°40'S and 77°30'E ... fo r t he tw o D is so st ic hu s s pe ci es d ur in g th e 20 06 /0 7 an d 20 ... . 30 (0 .4 2) 30 D ec –1 9 Fe b 20 07 /0 8 23 76 44 7 25 9 11 0. 7 (2 0. 9 ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 145–153 : Auteur(s): Taki, K., M. Kiyota, T. Ichii and T. Iwami

9. Characteristics of krill swarms from Prydz Bay

   , Antarctica, in December 1990. Swarm length, depth, thickness, Mean Volume Backscattering Strength (MVBS) and ... Euphausia crystallorophias. An increase in swarm length was seen with increasing distance from the coast ... before the 30 km point. 4. DISCUSSION The analysis was hampered by the change in ping rate after 1808 ... 1800 ~ I- l- I- I- 50 40 30 20 10 1002 c 80 !2: ~ 60 40 20 Figure 2: Log ... ) 60 50 40 30 20 10 1n (between swarm distance) Figure 3(b): Log transformed between ... - - - I- I -44 19 (kg) 50 0 40 ~ 30 20 10 70 60 50 40 30 20 10 I'J 0 0 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 177–189 : Auteur(s): Agnew, D.J. and I.R. Higginbottom

10. Homogeneity of body length composition of Antarctic krill within the commercial zone

    Abstract / Description:  The homogeneity of krill (Euphausia superba) length composition in commercial ... haul. There was no significant difference (P >0.5) in 53 out of 60 hauls. Therefore it is concluded ... that sampling from one part of the haul provides a reasonable estimate of length composition in the ... entire haul. In contrast to small variations in length composition within the same haul, variation ... x=47.2 20 Data set 2* 30 40 50 Length (mm) 60 15 10 5 n=182 x=48.7 n=187 x ... =163 x=51.7 20 30 40 50 60 Length (mm) Figure 2: Comparisons of kriU length compositions for ... " 10 CD x=38.9 x=37.5 l0- w.. 5 0 20 30 4D 50 60 Data set 53* Data set 49** ..-.. 15 ~ n ... .. 10 x=42.0 x=44.5 5 0 20 30 40 50 60 Length (mm) Leng t h (mm) Figure 2 (continued) 24 ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 17–28 : Auteur(s): Ichii, T.

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