Résultats de la recherche

1. A von Bertalanffy growth model for toothfish at Heard Island fitted to length-at-age data and compared to observed growth from mark–recapture studies

   -estimated parameters. A young-age adjustment (less than 5 years old) to the VB model is also given in order ... – 20 year range. This translated to larger predictions for the MLPLB-fi tted curve for ages below 5 ... after 175 days and 270 before 20 days at liberty. The median value of days-at-liberty was 163. Only ... . Note the relatively small number of fi sh either greater than 1 000 mm in length or greater than 20 ... than 5 years old) to the VB model is also given in order to give more realistic predictions of mean ...

   Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 43–66 : Auteur(s): Candy, S.G., A.J. Constable, T. Lamb and R. Williams

2. Directed research. Antarctic Marine Living Resources (AMLR). A program development plan

   research vessel capable of operating in Antarctic waters for a period of 180 days each year. Note: The full ... , 1986. File:  20-USA.pdf ... . In the 50 years between 1930 and 1980 the populations of blue, fin, sei, and humpback whales are ... of 180 days each year. Note The full text of this paper was published under the above title by ... fleets has already contributed to the overexploitation of Antarctic fish stocks. In the 50 years ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 363-373 : Auteur(s): Office of Science and Technology, NMFS, NOAA, US Department of Commerce (USA)

3. 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 ... 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 ... particular, in the southern coastal waters of the area (south of 65°30'S). Until 1988 krill biomass was ... 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

4. Biological parameters for icefish (Chionobathyscus dewitti) in the Ross Sea, Antarctica

   mature at about 340–360 mm total length (TL) and about 3–4 years of age, and that 95% were mature at ... about 370–400 mm TL and 6–8 years of age. Counts of growth zones in sectioned otoliths were used to ... approached a significantly larger mean asymptotic maximum size than males. Maximum ages of 8 and 11 years ... from most of the calendar year were therefore lacking, so it was not possible to investigate the ... be due to regurgitation of prey during capture. All otoliths were read by a single reader, and 30 ... , there is a lack of small fish (≤30 cm; age ≤ 1), and so the von Bertalanffy growth curve parameters ... small fish (≤30 cm). There is a need to sample these small fish. 5. Diet analyses showed most icefish ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 139–165 : Auteur(s): Sutton, C.P., M.J. Manning, D.W. Stevens and P.M. Marriott

5. Towards the development of a management plan for mackerel icefish (Champsocephalus gunnari) in Subarea 48.3

   years of poor krill availability. Thus natural  ortality of C. gunnari may, in some years, increase by a ... : Probability of stock biomass dropping below 20% of the unexploited median level over a 10-year period ... -year projection period, in only one-third of these was the spawning stock level less than 20% of the ... assumed to be independent between years and equally likely to occur in each year. Results of a number of ... clear, however, that if natural mortality (M) is highly variable from year to year, it is difficult to ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 63–77 : Auteur(s): Agnew, D.J., I. Everson, G.P. Kirkwood and G.B. Parkes

6. Australian research on Antarctic bird and seal diets

   Heard and Macquarie Islands have been collected during the last seven years. Published and unpublished ... ) 20 38 3' 1 58 400 39 29 32 o Location: Sea ice off Davis Station (68°30'S: 77°50'E ... Davis Station (68°30'S:77°50'E), in the south-eastern corner of the Prydz Bay Priority Area of CEMP ... from these studies. 2. SUMMARY OF FINDINGS 2.1 Adelie Penguin Location: Davis Station (68°30'S ... ): Euphausia crystallorophias 4 4 Euphausia superba 2 4 Fish 28 Amphipods 4 Location: Davis Station (68°30 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 231-249 : Auteur(s): Williams, R.

7. Midwater trawl catchability as an aspect of a quantitative assessment of krill biomass conducted using a trawl census survey

   swann depth (metres) 42 29 41 24 29 25 30 21 cr, swann depth 13 20 13 8 10 14 16 8 Mean swann ... 47 59 30 23 20 29 17 cr, mean swann length (metres) 15 16 19 7 10 7 20 4 Swann density field in ... by a trawl bag of 20 mm twine. This protects the trawl bag from mechanical damage. Features of ... catchability no less than ~ x(P) = 0.1, it would be necessary to carry out over the study area 20 hauls with a ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 257–272 : Auteur(s): Kasatkina, S.M.

8. Fish distribution and biomass in the Heard Island zone (Division 58.5.2)

   distribution, abundance and biology of the most important species, covering a number of years and seasons. Five ... gunnari, but total abundance varied greatly between years. Channichthys rhinoceratus has a similar ... CCAMLR Science, Vol. 2 (1995): 1-20 FISH DISTRIBUTION ... following changes were Each haul was for 30 minutes duration on the made with respect to summer 1992 ... of high density of C. gunnari and L. squamifuons; Autumn 1990 3 (2) 6 (6) 16 (16) 24 (20 ... variations were not in phase with each other. Duhamel (1991a) has demonstrated a three-year cycle of ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 1–20 : Auteur(s): Williams, R. and W.K. de la Mare

9. Vertical migrations of mackerel icefish (Champsocephalus gunnari) on the South Georgia shelf

   commercial concentrations of C. gunnari in years of high abundance of the species (1982/83, 1983/84 and 1986 ... may be used for clarification of survey techniques used in stock assessment. For a number of years ... concentrations were situated near the bottom or at 10 to 30 m above the bottom during daylight hours (09:00 to ... -18 18-20 20-22 22-24 Apri11983 BMRT Bottom 1.2 4.6 2.6 6.0 11.8 11.1 13.7 8.9 4.1 8.8 1.9 1.7 ... 7 6 5 4 3 2 1 0 2 4 6 8 10 12 14 16 18 20 22 24 Time of day, h Figure 1: Bottom ... , ~ __ J ~0~~~~~--~~~~----~/~~~~ t/h 10 8 6 4 2 B ---- 0 2. 4 6 8 10 12 14 16 15 20 22 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 3–14 : Auteur(s): Frolkina, J.A. and V.I. Shlibanov

10. Distribution and size of Antarctic krill (Euphausia superba Dana) in Polish commercial catches taken in the Atlantic sector of the Southern Ocean from 1997 to 1999

    (% ) Elephant South Shetland 1999 0 5 10 15 20 25 30 35 40 45 50 55 60 Length (mm) Fr eq ue nc y ... , therefore their results do not refl ect the year-round structure of krill concentrations. Additionally ... in one concentration can be as dense as 30 000 specimens per m-3 of water (Hamner et al., 1983 ... different areas of the Atlantic sector that yield the best commercial catches of krill. Each year, the ...

    Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 83–105 : Auteur(s): Jackowski, E

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