Résultats de la recherche

1. 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

   Paper Title:  Integrating Count Effort by Seasonally Correcting Animal Population Estimates ... animal count data to a common reference point of breeding chronology for species with a complex temporal ... function of sampling availability. ICESCAPE (Integrating Count Effort by Seasonally Correcting Animal ... IntegratIng Count effort by SeaSonally CorreCtIng anImal PoPulatIon eStImateS (ICeSCaPe): a method for ... animal count data to a common reference point of breeding chronology for species with a complex temporal ... function of sampling availability. ICESCAPE (Integrating Count Effort by Seasonally Correcting Animal ... for estimating abundance and its uncertainty from count data Introduction Counts of animal ...

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

2. Demographic characteristics of the Adélie penguin population on Béchervaise Island after 12 years of study

   after 12 years of study Abstract / Description:  Demographic parameters (age-specific survival rates ... eastern Antarctica after 12 years of monitoring under the CCAMLR Ecosystem Monitoring Program (CEMP). A ... gg ed (m in im um a ge 4 y ea rs ) 76 54 59 30 20 28 10 25 17 30 (a ) N um be rs ... at year 0, x is years and r is the annual rate of population increase (Figure 1). In terms of ... extended to include ages up to 19 years since Adélie penguins elsewhere have been shown to live up to 20 ... . An expected value for mean penguin breeding success over 20 years was also calculated. This value ...

   Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 53–74 : Auteur(s): Clarke, J., L.M. Emmerson, A. Townsend and K.R. Kerry

3. Fishing ground selection in the Antarctic krill fishery: trends in patterns across years, seasons and nations

   years, seasons and nations Abstract / Description:  Patterns of fishing ground selection were ... remained relatively constant in Subareas 48.2 (March–May) and 48.3 (June–August). In 25 years of krill ... Science, 3: 13–30. Hewitt, R.P., D.A. Demer and J.H. Emery. 2003. An eight-year cycle in krill biomass ... seasons and calendar years: CCAMLR fishing seasons start on 1 December and end on 30 November. For ... 1995/96. If the years are simply expressed as a single year, e.g. 1996, then these refer to calendar ... was 30 n miles x 30 n miles x 30 days or finer). Also, fine-scale data coverage was not complete ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 117–141 : Auteur(s): Kawaguchi, S., S. Nicol, K. Taki and M. Naganobu

4. Catch per unit effort (CPUE) data from the early years of commercail krill fishing operations in the Atlantic sector of the Antarctic

   Paper Title:  Catch per unit effort (CPUE) data from the early years of commercail krill fishing ... the period 1975/76 to 1987/88. Comparisons are carried out between subareas in single years, between ... years on a subarea and area basis, and between oceanic and shelf regions. Results show that the CPUE may ... differ between subareas, years and shelf/oceanic regions. Obviously, a consistent pattern of CPUE values ... and for different years (a to g). (e) Season 1984185 12 10 15 20 25 30 35 40 45 50 55 60 65 ... hours for the split-year (1 July to 30 June); (iii) mean monthly catch/hour for the split-year ... et al. 10 20 30 40 50 60 70 Total length (mm) 10 20 30 40 50 60 70 Total length (mm) Figure ... Total length (mm) (f) Season 1985186 10 15 20 25 30 35 40 45 50 55 60 65 Total length (mm) (g ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 31–50 : Auteur(s): Siegel, V., V. Sushin and U. Damm

5. Target strengths of krill at 136 and 20 kHz

   Paper Title:  Target strengths of krill at 136 and 20 kHz Abstract / Description:  Estimation of ... the mean single-krill target strengths range from-71 to-77 dB at 20 kHz. Trawl hydroacoustic method ... -75.7 53.7 4.9 1.1 16:20 1.3 -74.3 -75.4 53.9 3.9 1.19 20:30 0.14 -77.5 -69.0 54.2 5.7 1.23 Maude ... ) 0.72 Method 150 % 24 21 18 15 I2 . 9 6 3 0 10 20 30 40- 50 Figure 1 ... composition. Elephant Island area. January, 1985. 151 30 20 10 o % MM \. i ,~, Figure 3 ... . Krilllength composition. Bouvet Island area. December, 1979. 30 % 20 10 o 30 34 33 42 46 50 Figure ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 141–157 : Auteur(s): Kasatkina, S.M.

6. Evaluating the impact of multi-year research catch limits on overfished toothfish populations

   Paper Title:  Evaluating the impact of multi-year research catch limits on overfished toothfish ... assessed in this study indicate that, where a stock has been depleted to at or below 20% of the median ... 30 tonnes per year for 5 years) to assumptions about selectivity (scenarios 7 to 9), size-at ... is greater than 20 years are shaded light grey and those where recovery is greater than 30 years are ... ch 1.0 0.9 0.8 0.7 0.6 Figure 2: Impact of a 5-year research fishery on recovery 20 years after ... %, 25%, 30% and 35% of SSB0 at the end of the 5-year period. The annual catches taken in each scenario ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 47–55 : Auteur(s): Welsford, D.C

7. Modelling catch and effort data using generalised linear models, the Tweedie distribution, random vessel effects and random stratum-by-year effects

   distribution, random vessel effects and random stratum-by-year effects Abstract / Description:  The current ... standardised CPUE estimates and their precision can be obtained from the ‘fishing year’ parameter estimates ... as a result of the imbalance in the number of hauls in the year-by-vessel cross-classification ... . Further, the inclusion of an area stratum by fishing year interaction as an additional random effect in ... 20 30 40 50 -0 .6 -0 .4 -0 .2 0. 0 0. 2 0. 4 0. 6 Ship index R an do n ef fe ct e st ... im at e 0 10 20 30 ... early years of the fi shery and the effect this can have on ‘treatment’ (i.e. YEAR) fi xed-effect ... DISTRIBUTION, RANDOM VESSEL EFFECTS AND RANDOM STRATUM-BY-YEAR EFFECTS S.G. Candy Australian Antarctic ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 59–80 : Auteur(s): Candy, S.G

8. A stock assessment model of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea Region incorporating multi-year mark-recapture data

   Sea Region incorporating multi-year mark-recapture data Abstract / Description:  An exploratory ... hence a multi-year mark-recapture tagging program was initiated by New Zealand fishing vessels in 2001 ... model was developed for Antarctic toothfish in the Ross Sea region that incorporates multi-year release ... of tagged fish and subsequent multi-year data of recapture of tagged fish in conjunction with fishery ... . _______________________________________________________________ 1 The CCAMLR fishing season starts on 1 December and ends on 30 November in the following year ... north fishery selectivity 10 20 30 40 50 Age Age Age ... Age Age Age 10 20 30 40 50 10 20 ... 30 40 50 10 20 30 40 50 10 ...

   Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 39–62 : Auteur(s): Mormede, S., A. Dunn and S.M. Hanchet

9. Intra-annual variability in the density of Antarctic krill (Euphausia superba) at South Georgia, 2002–2005: within-year variation provides a new framework for interpreting previous ‘annual’ estimates of krill density

   the regression-predicted within-year variation. Years that stand out for markedly low krill density ... South Georgia, 2002–2005: within-year variation provides a new framework for interpreting previous ... g m –2, SD = 24.3), but had risen substantially by summer in each year (mean = 89.5 g m –2, SD ... instruments were used to explore whether high-frequency temporal variation (i.e. within-year) could have led ... et al. 30 summer) in the light of repeated observations of within-year changes to address the ... 30 0 19 6 30 –1 82 × 13 00 20 3 20 –1 89 × 2 19 / 02 –2 8/ 04 / 03 30 0 19 8 32 –1 84 ... × 13 34 22 7 21 –2 13 × 5 14 / 01 –2 4/ 03 / 04 30 0 19 8 32 –1 84 × 13 00 22 6 20 –2 12 ... a ‘low’ or ‘high’ krill year. In general terms, this was around ±35 g m–2 in summer and ±20 g m–2 ...

   Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 27–41 : Auteur(s): Saunders, R.A., A.S. Brierley, J.L. Watkins, K. Reid, E.J. Murphy, P. Enderlein and D.G. Bone

10. Distribution of fish larvae at South Georgia: horizontal, vertical, and temporal distribution and early life history relevant to monitoring year-class strength and recruitment

    distribution and early life history relevant to monitoring year-class strength and recruitment Abstract ... MONITORING YEAR-CLASS STRENGTH AND RECRUITMENT A.W. North (United kingdom) Abstract Four studies on ... : HORIZONTAL, VERTICAL, AND TEMPORAL DISTRIBUTION AND EARLY LIFE HISTORY RELEVANT TO MONITORING YEAR-CLASS ... length is also given; this includes data from a study in the fiord of CUmberland East Bay during 20 ... abundant in CUmberland East Bay (Figure 20). Pagothenia hansoni larvae of 23-54 mm SL occurred at all ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 105-141 : Auteur(s): North, A.W.

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