Résultats de la recherche

1. Precautionary measures for a new fishery on Martialia hyadesi (Cephalopoda, Ommastrephidae) in the Scotia Sea: an ecological approach

   000 tonnes, with an upper estimate of 550 000 tonnes if less reliable data are included. M. hyadesi ... spawns between autumn and mid-summer with peak hatching in winter/spring. Its life span has not been ... vary. In common with other ommastrephids, the species is probably semelparous. It is proposed that the ... established. Data from the CCAMLR Convention Area suggest that M. hyadesi may live for two years, but this may ... increments in statoliths were up to one year old (Rodhouse, 1991; Rodhouse et al., 1994). Given the early ... large mature females of only one year old in the South Atlantic. M. hyadesi, in common with other ... Convention Area suggest that M. hyadesi may live for two years, but this may vary. In coinmon with other ... were more mature in samples taken later in the year; ranging from stage I1 (Lipinski, 1979) at the ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 125–139 : Auteur(s): Rodhouse, P.G

2. Spatially explicit population dynamics models for Antarctic toothfish in the Ross Sea region

   dynamics of spatial heterogeneity of the population along with age structure, movement and reproductive ... were consistent with the results of tagging studies and fits to the other observations (age ... this parameter is poorly estimated, with the extreme of all fish migrating to spawn each year only ... year from fisheries data for the years 1998– 2011. The maximum exploitation rate was assumed to be ... the ACC or current flow (e.g. Mormede et al., 2012), but were later super- seded with better-fitting ... the years 1998–2011. Year Catch (tonnes) Number of observations used to derive input data Catch ...

   Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 19–37 : Auteur(s): Mormede, S., A. Dunn, S. Hanchet and S. Parker

3. Comparative feeding ecology of Patagonian toothfish (Dissostichus eleginoides) in the southwestern Atlantic

   continental shelf/slope between 46°-55°S and 60°-64°W, and around South Georgia between 53°-55°30' and 3 ... (Bathyduaco spp.), Nototheniidae and Channichthyidae (Chionoduaco spp.), all with occurrences below 3%F ... ), and less than 10% had stomachs with an index of 3 (100°/0 full), while about 40% of fish between 110 ... and 180 cm TL had stomachs with an index of 3 (Figure 5). This observation could be related to prey ... (Lloris a n d Rucabado, 1991). Even though Yukhov (1972), based o n data from the analysis of sperm ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 105–124 : Auteur(s): García de la Rosa, S.B., F. Sánchez and D. Figueroa

4. Distribution characteristics of krill aggregations in the fishing ground off Coronation Island in the 1989/90 season

   aggregations. Krill was harvested by standard midwater trawls with a horizontal mouth opening of 33 m. All ... standard midwater trawls with a horizontal mouth opening of 33 m. AU common types of kriU aggregations ... recorded as a scattered layer in the 10 to 140 m depth range with interrupted, short tracks formed by ... females with a normal thorax were noted in the south-west towards the end of the study period (Figures 3b ... uniform and sparse layer or separate sparse patches after 11 p.m. Swarming occurred with the onset of ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 49–73 : Auteur(s): Kasatkina, S.M. and V.I. Latogursky

5. Supplementary data on exploited stocks in Division 58.5.1 (Kerguelen)

   will later have repercussions on the adult stock, with some inertia due to growth, taking into account ... impact will be observed on the adult stock with a delay of about four years corresponding to the arrival ... operating in the fishing areas. They are concerned both with statistical (catch and fishing effort) data ... . Regular experimental fishing with trammel nets in this area would thus allow the measurement of ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 147–161 : Auteur(s): Duhamel, G.

6. Characteristics of seasonal variation in diurnal vertical migration and aggregation of Antarctic krill (Euphausia superba) in the Scotia Sea, using Japanese fishery data

   (Euphausia superba) associated with the daylight phase over the diurnal cycle (i.e. brightness categories ... austral summer and early autumn, deepened gradually from autumn and reached maximum depth in winter in the ... Scotia Sea, shifting to shallower depths again in early spring. The average catch-per-unit-effort (CPUE ... vertical migration and aggregation of Antarctic krill (Euphausia superba) associated with the daylight ... and SO. Daily average trawling depth tended to be shallower during austral summer and early autumn ... shallower depths again in early spring. The average catch- per-unit-effort (CPUE) was highest during the day ... and swarming associated with variations in daylight levels. In this study, average seasonal ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 163–172 : Auteur(s): Taki, K., T. Hayashi and M. Naganobu

7. Location and intensity of the Soviet krill fishery in the Elephant Island area (South Shetland Islands), 1988/89

   fished and followed as they drift from the island with the current; and (iii) vessels return to position ... (i) when aggregations are dispersed or lost due to storms and other factors. The velocity of the ... as they drift from the island with the current; and (iii) vessels return to position (i) when ... aggregations are dispersed or lost due to storms and other factors. The velocity of the northeast drift of ... with a 78/420 m trawl was taken to be the standard fishing unit. It yielded the highest total catch of ... all vessels engaged in the fishery. 307 Calculations and mapping of fishing areas were made with ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 305–335 : Auteur(s): Sushin, V.A. and A.S. Myskov

8. Observations of fishing operations on a krill trawler and distributional behaviour of krill off Wilkes Land during the 1985/86 season

   of fished swarms ranged from 100 m to 10 km with different distributions occurring in different ... off Africa. In recent years, the through-year activity of the trawlers has come to be incorporated ... to 10 km with different distributions occurring in different fishing areas. While catch per towing ... valuable due to marketing competition with the smaller euphausid species, Euphausia pacifica, fished off ... hence a combination with other bottom trawling operations was sought. Historical fishing grounds used ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 335-368 : Auteur(s): Ichii, T.

9. Krill fishing in the Scotia Sea in relation to bathymetry, including the detailed distribution around South Georgia

   this area but also operated further west on a range of banks associated with submarine valleys. The ... results are discussed in relation to the ecology of krill and the fishery's interaction with local ... with the main summer foraging area was greatest in the poor krill year of 1993/94 (Brierley and ... predominantly in this area but also operated further west 011 a range of banks associated with submarine ... valleys. The results are discussed in relation to the ecology of krill and the fishery's interaction with ... than a few weeks in a year and at other than a local scale. Krill population dynamics operate over ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 1–17 : Auteur(s): Murphy, E.J., P.N. Trathan, I. Everson, G. Parkes and F.H.J. Daunt

10. Otolith microstructure of juvenile mackerel icefish (Champsocephalus gunnari) (Channichthyidae) in the South Georgia area

    comprised two year classes arising from spawning in the 1999/2000 and 2000/01 split-years. The mean width of ... 2001/02 year class lasted four months. This was estimated based on a retrospective count of daily ... increments. TL varied from 5.5 to 10.4 cm for fish in their first year (120–250 days) to 12.5–13.3 cm in 1 ... -year-old fish (477–533 days). The radius of the first annulus ranged from 0.7 to 1.3 mm. The ... –III have been observed throughout the year, while females with gonads at stage IV have only been ... their fi rst year (fi rst-year fi sh); overwintered fi sh with the fi rst growth zone were called ... shown in Figures 1, 2 and 3. For age-reading purposes, the Antarctic split- year system was used, in ... the 1999/2000 (5 speci- mens) and 2000/01 (20 specimens) split-years. The 1999/2000 year class ...

    Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 173–181 : Auteur(s): Shcherbich, L.V

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