Résultats de la recherche

1. Assessments of by-catch in trawl fisheries at Heard and McDonald Islands

   Island area could be a combination of (i) limiting the total by-catch in a year to the estimates of long ... than 0.1 over a 20-year period. The lowest y satisfying these rules was determined for the three ... 0 20 0.2 for C. rhinoceratus WG-FSATWG-FSA-97/30). L. squainifrons 1 25 11 360 0.1 ... the end of 20 years of exploitation should be 75% of the pre-exploitation spawning biomass and that ... year to the estimates of long-term annual yield, (ii) allowing catches of by-catch species of up to ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 231–243 : Auteur(s): Constable, A.J., R. Williams and W.K. de la Mare

2. Annual changes in species composition and abundance of myctophid fish in the north of South Georgia (Subarea 48.3), Antarctica, during austral winters from 2002 to 2008

   of myctophid fish: (a) Protomyctophum choriodon. (continued) A 0% 10% 20% 30% 40% 50% 60 ... ) 2004 (n=33) 2008 (n=643) 2002 (n = 20) 2004 (n = 33) 2008 (n = 643) 70 60 50 40 30 20 10 0 ... % 10% 20% 30% 40% 50% 60% 20 30 40 50 60 70 80 90 100 110 120 130 Standard length (m m ) P e rc ... (n = 8) 2004 (n = 109) 2002 (n = 9) 60 50 40 30 20 10 0 P er ce nt ag e co m po si ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 155–163 : Auteur(s): Iwami, T., M. Naganobu, K. Taki and M. Kiyota

3. Marine debris and fishing gear associated with seabirds at sub-Antarctic Marion island, 1996/97 and 1997/98: in relation to longline fishing activity

   Prince, 1996). Both unregulated and sanctioned longline fishing for Patagonian toothfish within the 20 ... had a 59 cm monofilament nylon snood attached to it, and together had an estimated total volume of ... Entanglements Incidental Finds Four seabird entanglements were observed during the two years of this study ... opposed to 1 300 (Gales, 1998)) and that the amount of hooks set in the respective years was very ...

   Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 85–96 : Auteur(s): Nel, D.C. and J.L. Nel

4. Analysis of albatross and petrel distribution within the CCAMLR Convention Area: results from the Global Procellariiform Tracking Database

   for the estimation of distribution during the breeding season for all 20 albatross, petrel and ... September–30 April). Assessment of bird distribution during these peri- ods was made across the whole of ... supported by at-sea records collected over a 19-year period from 1981 to 1999 (Woehler et al., 1999). In ... : Robertson, G. and R. Gales (Eds). Albatross Biology and Conservation. Surrey Beatty, Chipping Norton: 20 ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 143–174 : Auteur(s): BirdLife International (prepared by C. Small and F. Taylor)

5. Seabird mortality in the Patagonian toothfish longline fishery around Crozet and Kerguelen Islands, 2001–2003

   petrels and grey petrels is explained by the time of year, geographical area and type of longliner (manual ... the year, although it does vary considerably between months and be- tween years. Overall, fi shing ... sec- tor both within and between years. Irrespective of year, the lowest number of seabirds caught ... petrels and grey petrels is explained by the time of year, geographical area and type of longliner ... Collection of data The fi shing year extends from 1 September to 31 August. There are two types of ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 53–80 : Auteur(s): Delord, K., N. Gasco, H. Weimerskirch, C. Barbraud and T. Micol

6. Estimating krill recruitment and its variability

   rate for 1+ krill (the ratio of the number of krill aged one year to the number of krill aged one year ... for 2+ krill (the ratio of the number of two-year-old krill to the number aged two and above) from ... la Mare 10 9 8 7 6 h Y .M 5 a 4 3 2 1 0 0 10 20 30 40 50 60 70 Length ... krill. 0 10 20 30 40 50 60 Length class (mm) Figure 2: Fit of a mixture distribution to the density ... Estimating Krill Recruitment and its Variability 20 30 40 50 60 Length (mm) 100 90 Nella Dan: ADBEX I ... o 80 8 70 * 60 .$ : 5 30 D 20 10 0 Figure 7: The fit of mixture distributions to ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 55–69 : Auteur(s): de la Mare, W.K

7. 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

8. 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

9. 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

10. 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

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