Résultats de la recherche

1. Line weights of constant mass (and sink rates) for Spanish system Patagonian toothfish longline vessels

   - eter polypropylene hauling line, 8 mm diameter polypropylene branch/connecting lines (20 m long) and ... fishing line), which took 30 s to pay out, to provide inde- pendence between the replicates. At the end ... : Mean masses and coefficients of variation (SD ÷ mean) of 20 randomly selected weights of each weight ... 16 18 20 0 2 4 6 8 10 12 14 16 18 20 4 kg 6 kg 8 kg D ep th (m ) D ep th ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 93–106 : Auteur(s): Robertson, G., C.A. Moreno, E. Gutiérrez, S.G. Candy, E.F. Melvin and J.P. Seco Pon

2. Performance and geometry of the FP-120 trawl used during UK fish stock assessment surveys around South Georgia, Subarea 48.3

   (17, 20 and 21) were logged every 30 seconds and the fourth (22) every 20 seconds. The hydrophone ... to the nearest minute. 20 25 30 35 40 45 50 Station Figure 11: Trawl start times per station ... , biomass, finfish, CCAMLR INTRODUCTION Surveys using bottom trawls have been used for over 20 years to ... viable data from an individual tow (standard tow duration was 30 minutes), this tow was discarded ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 51–69 : Auteur(s): Pilling, G. and G. Parkes

3. Estimation of effective sample size for catch-at-age and catch-at-length data using simulated data from the Dirichlet-multinomial distribution

   model in predicting class/bin by year frequencies is used to obtain a single, across-years, over ... year is important for such assessments, and this issue is studied using simulation. Between-haul ... heterogeneity within fishing year was simulated using samples from the Dirichlet-multinomial (D-M) distribution ... using aggregate year-level frequencies. The other three estimators use the haul-level frequencies ... centred year value obtained from the integer values of year, y, so that for a 20-year simulation period ... year of the 20-year simulation period to 8.12 for the last year with a value at year 10.5 of 7. For ... to 0.1544 by year 20 with a value of 0.13 at year 10.5 and recruitment was also varied lin- early ... , but in this case, declining from 196 939 for year 1 to 3 061 for year 20 with a value of 100 000 at ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 115–138 : Auteur(s): Candy, S.G

4. Defining smaller-scale management units to further develop the ecosystem approach in managing large-scale pelagic krill fisheries in Antarctica

   explored in terms of the structure of animal populations. A group of animals that are continuously ... considered separate small-scale areas if the vector of transport is relatively predictable from one year to ... predator foraging information. The potential overlap between the fi shery and predators throughout a year ... may alter as a result of changing fi shing patterns during the year. Figure 7 shows the relative ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 117–131 : Auteur(s): Constable, A.J. and S. Nicol

5. 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

6. 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 ... ) developpera et mettra en vigueur. le Programme AMLR qui met l' accent sur la recherche dirigee entreprise ... 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)

7. 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

8. 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

9. 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

10. 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.

Pages