Résultats de la recherche

1. 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 ... (t ) 0 20 40 60 80 0 1 2 3 4 hof 0 20 40 60 80 0 1 2 3 4 Year S pa w ni ng B io m as ... m as s x 1 03 (t ) 0 20 40 60 80 0 1 2 3 4 hof 0 20 40 60 80 0 1 2 3 4 Year S pa w ... ) Parameter set 1 945 10% 0, 15, 30, 45, 60, 75, 90 As per Table 1 2 893 15% " " 3 841 20% " " 4 782 ... 60 75 90 1 10 27 28 29 30 31 32 34 2 15 21 22 24 25 26 27 28 3 20 17 17 19* 20 21 22 23 4 25 15 16 ...

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

2. 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

3. 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 ... Normal quantilesNormal quantiles P ea rs on re si du al s 100 80 60 40 20 0 ... two predictive categorical factors besides YEAR: the nationality of the fi sh- ing vessel and the ... analyses. The random effects included in the GLMM were cruise and stratum-by-year interaction. These two ... the national- ity fi xed-effect term redundant), two vessels were completely confounded with YEAR ...

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

4. 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 ... East Bay about one month later when they were 10-30 mm SL. Psilodraco breviceps larvae of 11-27 mm ... year class strength of the youngest age class of the population. It would also be pertinent to ... - 127 - 54 55 55"S L..... ___ ---1 ____ ------L ____ --'--::_---' 30' 40"W 39 38 37"W FiguLe 10 ... 2000m " 55"S L-____ L-____ 1-___ --''--_-' 30' 40"W 39 38 37"W FiguLe 11 Champsocephalus gunnari ...

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

5. An assessment of toothfish in Subarea 48.3 using CASAL

   model (using all data) and one using only length frequency and the last two years’ tagging data ... spawning take place, lasted from 1 May to 31 August. The remainder of the year (1 September to 30 ... - ingly, two ‘fleets’ were identified: one consisting of all vessels fishing from 1985 to 1997, and the ... for the later period. The two estimated selectivity curves are shown in Figure 2. The year-class ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 65–95 : Auteur(s): Hillary, R.M., G.P. Kirkwood and D.J. Agnew

6. Status of krill target strength

   aggregations of live euphausiids and should not be affected by a frequent cause of bias in single-animal ... on both animal size and transmit frequency, notwithstanding admitted shortcomings. Some recent single ... -animal measurements of target strength for live euphausiids and euphausiid-related species, made under ... number density were performed at 30 and 20 kHz. Measurements at 30 kHz were performed near Bouvet Island ... scattering features (outer boundary of the animal) change slowly along its lengthwise axis. However, one ... of animals, ka, where a is the cylindrical radius of the animal, spanned the values of two to six ... effects discussed earlier in this article and differences in animal type), the structure exhibited in the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 101–126 : Auteur(s): Foote, K.G., D. Chu and T.K. Stanton

7. Chilean krill fishery: analysis of the 1991 season

   100 co ...r 90 ctl Q) "- 80 ctl .0 ::J 70 Cl) 60 E 0 '-....... 50 .c () 40 ro () 30 ... ....... 0 Q) 20 O'l ctl -10 c Q) Q 0 "-Q) (L 1977 1979 1981 1983 1985 1987 1989 1991 Year \-e ... ;--'---"??--------"'" ;§ l Year average = 108 J 40 -+-----, 1 5 10 15 20 25 Fishing day (Starting 20/02/91) Figure 2 ... . 281 Chilean Krill Fishery Analysis of 199 'I season 90 ~·_~w __ 80 --- --..-... E ---- 75 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 273–287 : Auteur(s): Marín, V.H., A. Mujica and P. Eberhard

8. Sensitivity investigation of the SDWBA Antarctic krill target strength model to fatness, material contrast and orientation

   study, the SDWBA TS pattern and frequency response behaviours at standard survey frequencies and animal ... the distribution of animal orientations. Due to the high variability of TS to realistic changes in ... - ducer. When the animal orientation was away from these aspect angles, the predicted scattering was ... 1 15 1. 15 0. 29 3 0. 36 2 20 1. 2 0. 31 9 0. 39 4 30 1. 3 0. 37 4 0 ... ) and standard deviation (5, 10, 20 and 30 degrees) of the Gaussian distribution of orientation. It ... O rie nt at io n an gl es * θ i ph i de gr ee s 90 + th et a Fr eq ue nc y ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 97–122 : Auteur(s): Calise, L. and G. Skaret

9. A review of the diet and at-sea distribution of penguins breeding within the CAMLR Convention Area (submitted to the 2008 Joint CCAMLR-IWC Workshop)

   studies of penguin diet only last one or two years, which will fail to fully capture annual variability ... cases. Two studies of pre-moult movements and of moulting distribution exist, and one of juvenile ... (three female, one male, two unknown gen- der) with PTTs in October–December during chick rearing at ... shift in signal strength as two or more satellites pass over the transmitter is used to triangulate ...

   Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 75–114 : Auteur(s): Ratcliffe, N. and P. Trathan

10. Evidence to support the annual formation of growth zones in otoliths of Antarctic toothfish (Dissostichus mawsoni)

    the Ross Sea (CCAMLR Subarea 88.1) have been aged assuming that one translucent zone is formed ... in each consecutive mode. This indicates that the modes represented year classes and that one ... examined, and the translucent zones counted. Zone counts were consistent within modes, and increased by one ... number of zones between the fluorescent oxytetracycline line and the otolith margin indicates that one ... . 0 20 40 60 80 100 120 140 160 180 0 5 10 15 20 25 30 Age (years) To ta l l en gt h ... between 0+ and 3+ years. A length-frequency distribution of the aged fi sh by estimated year class ... is from 0.6 to 4.0 cm yr-1 for fi sh aged from 15 to 30 years. It is interesting that all the ... represented year classes and that one translucent zone is formed annually in otoliths of juvenile D. mawsoni ...

    Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 125–138 : Auteur(s): Horn, P.L., C.P. Sutton and A.L. DeVries

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