Résultats de la recherche

1. The status of krill (Euphausia superba DANA) resources in CCAMLR Statistical Divisions 58.4.2 and 58.4.3 from 1988 to 1990. Results of acoustic surveys

   abundant 1986 and 1987 year-classes and with a diminished rate of emigration of krill of these year-classes ... paper. It was found that the increase in krill biomass observed in the area in 1990 is linked with the ... in krill biomass observed in the area in 1990 is linked with the abundant 1986 and 1987 year-classes ... and with a diminished rate of emigration of krill of these year-classes from the area in 1989/1990 ... density was 41 g/m2. In the eastern part of the area, krill was found in loose aggregations with a mean ... year to year. Therefore, data in Table 1 covers only areas where the same level of detail and accuracy ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 163–173 : Auteur(s): Bibik, V.A. and V.N. Yakovlev

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

   . mawsoni on BANZARE Bank is similar to that hypothesised for the Ross Sea population with analogous ... . (1983) found D. eleginoides in areas with surface temperatures higher than 3°C. Gon and Heemstra (1990 ... Toothfish are the largest nototheniid species in the Southern Ocean, with two species having a cir ... population with analogous latitudinal patterns in sexual maturity and size composition. The study indicates ... Hureau, 1985; Gon and Heemstra, 1990). However, there is over- lap with D. eleginoides and confusion ...

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

3. Information on the status of fjord Notothenia rossii, Gobionotothen gibberifrons and Notothenia coriiceps in the lower South Shetland Islands, derived from the 2000–2006 monitoring program at Potter Cove

   early 1980s, while those of G. gibberifrons have further declined and remain close to zero. At Harmony ... was absent in the catches. These trends are consistent with those observed in scientific cruises ... sampling period of 24 years which began in 1983, and at Harmony Cove in the summers of 2001to 2003. The ... date (Epanenchikov kernel, bandwidth = 0.15), together with the observed split-year mean values. 0 ... , particularly over the last two years. These observations are consistent with results from bottom trawl ... trend of N. rossii catches from 1991 to 2006, the actual levels are half of those found in the early ... absent in the catches. These trends are consistent with those observed in scientifi c cruises studying ...

   Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 83–87 : Auteur(s): Barrera-Oro, E.R. and E.R. Marschoff

4. Acoustic estimates of krill biomass in the Elephant Island area: 1981–1993

   years 1981 to 1993 (with the exception of 1982 and 1986). Estimates for 1981 to 1991 are based on ... density over the 13-year period were 1 703 x  103 tonnes and 53.2 g/ 2. File:  01hewitt-demer.pdf ... ., 1991). Biomass estimates range from 267 x 10 3 tonnes (March/April 1985) to 4 880 x 10 3 tonnes ... vicinity of Elephant Island are presented for the years 1981 to 1993 (with the exception of 1982 and 1986 ... /m2. Average biomass and average density over the 13-year period were 1 703 X 103 tonnes and 53.2 g ... -year period was l 703 X 10"onnes and 53.2 g/m2. The lowest estimate of average biomass density was ... . * excluding biomass of observed superswarms Year 1981 1983 1984 1984 1985 1987 1988 1989 1990 ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 1–5 : Auteur(s): Hewitt, R.P. and D.A. Demer

5. Length- and age-at-spawning of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea

   spawn at a younger age with an A 50% of 12.8 years (95% CI 11.9–14.0) or 120.4 cm (95% CI 114.8–126.7 ... stage for at least one year. Individual oocytes are then recruited into the vitellogenic phase over at ... maturation stage by approximately May each year. The age at 50% spawning for females on the Ross Sea slope ... region is 16.6 years (95% CI 16.0–17.3) or 133.2 cm (95% CI 130.9–135.7) by length. On average, males ... ). Most samples were collected between mid-December and early-February with a spatial coverage of the ... occur every year. For tooth- fish, consistent with other notothenioids, individu- als with only CA-stage ... subsequent year) is detailed by Kock and Kellermann (1991) with specific application to fish- eries ... vitellogenesis and spawning completes a two-year developmental process, with cell and follicle remnants present ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 53–73 : Auteur(s): Parker, S.J. and P.J. Grimes

6. Length-based assessments revisited – why stock status and fishing mortality of long-lived species such as toothfish cannot be inferred from length-frequency data alone

   eleginoides) are illustrated. While length-frequency data can be useful in assessments when integrated with ... , and embedded into the existing CCAMLR man- agement framework with reference points and de- cision ... migration. It represented age classes from 0 to 50 years, with the last age class being a ‘plus class’ in ... Reference year 2000 First year of projection 2001 Years to project stock in simulation 60 y Reference ... selectivity Age (years) Age (years) Age (years) Year Year Year S el ec tiv ity S to ck s ta tu s ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 57–73 : Auteur(s): Ziegler, P.E., D.C. Welsford and A.J. Constable

7. Analysis of the diet of Champsocephalus gunnari at South Georgia in late summer from 1994 to 1997, Dr Eduardo L. Holmberg surveys

   1996 and 1997 (in line with years of high krill abundance). This information is well in accord with ... well as fish, was only occasional or negligible and varied from year to year. The spatial distribution ... of the main prey items in the diet of C. gunnari, as well as of the proportions of stomachs with ... /without food in Subarea 48.3, did not show a consistent pattern from year to year.  Likewise, in the four ... four years, while krill biomass densities were comparable with those in the previous year and were ... . Year 1996 1997 The spatial distribution of the proportions of stomachs with/without food in the ... elaborated with material from the 1994 and 1995 surveys, correspond to age groups 1 to 3 years (Barrera-Oro ... (below years of historically high abundance), and high in 1996 and 1997 (in line with years of high ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 103–123 : Auteur(s): Barrera-Oro, E., R. Casaux and E. Marschoff

8. New data on spawning, hatching and growth of Champsocephalus gunnari on the shelf of the Kerguelen Islands

   the inner shelf has enabled a new cohort of fish to be identified each year. However, annual ... outer shelf. The three-year cycle observed previously seems to be related to the maturation stage of ... grow more than 10 cm a year during the two first years, after which minimum values are observed ... cohort: l-year-old immature fish (2.9% of the sample) winter 1991 /92 1988 cohort: first spawning, 3 ... the inner shelf has enabled a new cohort of fish to be identified each year. However, annual ... outer shelf. The three-year cycle observed previously seems to be related to the maturation stage of ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 21–34 : Auteur(s): Duhamel, G

9. International CCAMLR applied research and monitoring program, Prydz Bay priority area

   Australia towards the first five years of an International CCAMLR Applied Research and Monitoring Program in ... the direct contribution which Australia proposes to make to a first five year program in this region ... year to year fluctuation in the abundance and distribution of the selected consumers and their key ... phase of technical development, some joint work conducted simultaneously with research vessels of ... vessels used by Australia in the future, and other nations. Early life stages of fish are collected as ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 283-295 : Auteur(s): Australia

10. Age, growth and size at sexual maturity of Macrourus carinatus caught as by-catch in Australian sub-Antarctic trawl fisheries

    McDonald Islands (Division 58.5.2) in 1992 and 1993. The range of estimated ages was 4 to 25 years. There ... and the proportion of fi sh with maturity stages 2–5 and 3–5 in each length bin calculated. A ... at least 3 hours. Prepared otoliths were viewed with a dissecting microscope under transmitted ... /February 1992 and September 1993, and a commercial trawl fi shing trip to Heard and McDonald Islands in ... weight (to the nearest 10 grams) of a random subsample of fi sh. Only fi sh with undamaged tails were ...

    Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 139–151 : Auteur(s): van Wijk, E.M., R. Williams and A.J. Constable

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