Résultats de la recherche

1. Status of the Polish FIBEX acoustic data from the West Atlantic

   densities of krill in the oceanic parts of the Drake Passage were low (3 g m-2); however, the results also ... cruises, with acoustic integration data relating to time, rather than distance steamed. The acoustic ... the BIOMASS Data Centre. These data were stored with data relating to distance steamed and did not ... C is (BTOMASS, 1991). an equipment constant (20 dB). MVBS values with time and positional data ... MVBS Data reference to BIOMASS (1986); transect labels were added to the data. For compatibility with ...

   Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 125–132 : Auteur(s): Trathan, P.N., J. Kalinowski and I. Everson

2. Age and growth of the Antarctic skate (Amblyraja georgiana) in the Ross Sea

   . Caudal thorns viewed with transmitted white light provided the clearest growth bands, but reading ... preliminary and should be used with caution. Further work is needed to determine whether the thorn ageing ... ages at maturity of 6–7 years for males and 8–11 years for females. These estimates are near the middle ... been validated. The maximum estimated age was 14 years, but this should be regarded as a conservative ... skate, but usually they fell in the middle of the size range (Figure 1); this is consistent with the ... , four with scores of 3, and one with a score of 4. There are many possible explanations for these ... (year–1) t0 ± SE (years) Females 77 69.2 ± 3.1 0.402 ± 0.169 –0.73 ± 1.13 Males 58 79.9 ± 14.5 0.163 ... , 1960 (3): 258–260. Dulvy, N.K. and J.D. Reynolds. 2002. Predicting extinction vulnerability in ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 183–194 : Auteur(s): Francis, M.P. and C. Ó Maolagáin

3. 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 ... -structure has been lost. (iv) In year y = 10 (the year before fishing commences), the a+ biomass is ... maturity and first-capture (am = ar = 3), the 2-year-olds of the preceding year contribute to the spawning ... model of Appendix 1 with the "base case" set of parameter value choices: ~ = 3; elm = 3 and O's = 0.3 ... 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 : Auteur(s): Butterworth, D.S., A.E. Punt and M. Basson

4. Biogeographic patterns of benthic invertebrate megafauna on shelf areas within the Southern Ocean Atlantic sector

   Southern Ocean habitats into zoogeographical provinces date back to the early 20th century (Koehler ... land-based stations, and have been limited by very small spatial scales with little attention given ... communities for com- parative purposes, with an ultimate aim of identi- fying and understanding broader-scale ... (Subarea 48.2), a four-panel bottom trawl (HBST) with vented V-doors (Net Systems Inc., Bainbridge Island ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 167–192 : Auteur(s): Lockhart, S.J. and C.D. Jones

5. Integrating Count Effort by Seasonally Correcting Animal Population Estimates (ICESCAPE): a method for estimating abundance and its uncertainty from count data using Adélie penguins as a case study

   animal count data to a common reference point of breeding chronology for species with a complex temporal ... reported measures of uncertainty associated with originally published counts are propagated through to the ... ) on 17 November 1972, together with the aggregated distribution for all sites combined. is ... as represent- ing 1, 2 or 3 standard errors around the estimate, with an additional option of ... the adult data, with dis- tributions arising from 1 000 bootstrap replicates shown in Figure 3 ... animal count data to a common reference point of breeding chronology for species with a complex temporal ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 213–227 : Auteur(s): McKinlay, J., C. Southwell and R. Trebilco

6. Effect of line sink rate on albatross mortality in the Patagonian toothfish longline fishery

   weights. Asymptotic sink rates (0.1-0.15 m/s) were achieved with 70 m intervals between 6.5 kg weights ... . Sink rates to 4 m depth were greatest with 35 m (0.44 m/s) and 50 m (0.33 m/s) between weights. For ... /s should greatly reduce the incidental take of albatrosses. For autoline vessels with gear and line ... -setting characteristics similar to the experimental vessel, this sink rate should be achievable with 4 kg ... -and-hook bearing 11.5 mm mother line with each end attached to 100 kg anchors, which were used to ... . Each batch of 20 baskets was followed by 140 m of mother line with no branch lines attached; a 15-20 ... (Figure 3). Sink rates to any depth did not vary greatly with weight spacings >70 m, suggesting that at ... elements of both. Figure 3 infers that even to 4 m depth with >70 m weight spacings the longline would ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 133–150 : Auteur(s): Robertson, G.G

7. Krill distribution in the western Atlantic sector of the Southern Ocean during 1983/84, 1984/85 and 1987/88 based on the results of Soviet mesoscale surveys conducted using an Isaacs-Kidd midwater trawl

   the krill distribution field with high biomass of aggregations was observed in the western part of the ... area stretching from the Antarctic Peninsula to the eastern part of the South Orkneys area. The ... eastern part of the Scotia Sea may cause it to be absent from the South Georgia region regardless of ... krill biomass distribution (g/1 000 m 3) and its mean values were analysed by subarea (Subareas 48.1 ... eastern Scotia Sea and around South Georgia. In addition, a zone with krill biomass of 100-1 000 g / l ... part varies significantly. In the spring period (Figure 3) krill was virtually absent in the eastern ... approximately 110 days, i.e. from early November to the middle of February. In this regard, krill stock ... the krill distribution field with high biomass of aggregations was observed in the western part of ...

   Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 59–70 : Auteur(s): Sushin, V.A. and K.E. Shulgovsky

8. An impact assessment framework for bottom fishing methods in the CAMLR Convention Area

   ). • Scenario 3: Floats on both ends lost; attempted recovery of lost gear (additional impact arises from ... . Effort was converted to units commensurate with the definition of impact footprints in Steps 2 and 3 ... ). New Zealand responded with an impact assessment to assess and quantify the likely impact of all New ... observers and vessel captains with extensive experience in the Ross Sea fishery), followed by extensive ...

   Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 195–210 : Auteur(s): Sharp, B.R., S.J. Parker and N. Smith

9. Annual changes in species composition and abundance of myctophid fish in the north of South Georgia (Subarea 48.3), Antarctica, during austral winters from 2002 to 2008

   in early summer but more important later and the dominant prey for king penguins at South Georgia ... P. choriodon was mostly unimodal with no significant differences among years (Figure 2a). The size ... Maru. An Otter midwater trawl of ca. 100 m long with a horizontal open- ing of ca. 20 m and a vertical ... the north- west of South Georgia during austral autumn, with the abovementioned three species being ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 155–163 : Auteur(s): Iwami, T., M. Naganobu, K. Taki and M. Kiyota

10. Identifying taxonomic groups vulnerable to bottom longline fishing gear in the Ross Sea region

    , which conflicted with a radi- ocarbon age estimate of 1 800 years (Goodfriend, 1997). Subsequently ... (>60 mm year–1) (Grigg, 1976) and live about 40 years. A black coral speci- men off the California ... can be more than 3 m tall, consisting of complex branching structures with brittle skeletons that ... organizations and arrangements, and consistent with the precaution- ary approach and ecosystem approaches, to ...

    Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 105–127 : Auteur(s): Parker, S.J. and D.A. Bowden

Pages