Résultats de la recherche

1. Modelling variability and estimating power to detect change in Adélie penguin fledgling weights

   the number of birds weighed in each five-day period from 50 to 30 without substantial loss of power ... year, but there was no evidence that the rate of decline differed between years. A consequence of this ... Paper Title:  Modelling variability and estimating power to detect change in Adélie penguin ... fledgling weights Abstract / Description:  Statistical models of variation in Adélie penguin fledgling ... the following calendar year (hereafter referred to as years). In each of the 12 years, an attempt was ... year i. The number of penguins measured in year i is ni and r is the number of pre-impact years. It ... collected on fledgling weights on date x for samples of n fledglings per year (1) in each of r years prior ... birds, or (c) 30 birds each year. Change detected for three to five years of monitoring after change ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 191–200 : Auteur(s): Emmerson, L.M., C. Southwell and J. Clarke

2. Status of the coastal stocks of Dissostichus spp. in East Antarctica (Divisions 58.4.1 and 58.4.2)

   Paper Title:  Status of the coastal stocks of Dissostichus spp. in East Antarctica (Divisions ... operating off the coast of East Antarctica (30°E–150°E; FAO/CCAMLR Divisions 58.4.1 and 58.4.2) since 2003 ... participation in the fishery, with only some Small-scale Research Units (SSRUs, consisting of 10° longitude ... there are two stocks in the area, one in Division 58.4.1 and one in Division 58.4.2, with the division ... 58.4.2. Fishing years extend from 1 December of the previous year to 30 November of the named year ... years was virtually in the same place each year (Appendix 2, Figures 2.1(g, h and i)). Fish could ... of toothfish in an area, with animals only being replaced by immigration over the scale of a year ... fish tagged in year y1 and recaptured in year y2, nt is the number of tags released in year y1, l is ...

   Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 71–100 : Auteur(s): Agnew, D.J., C. Edwards, R. Hillary, R. Mitchell and L.J. López Abellán

3. Estimating optimal observer coverage in the Antarctic krill fishery

   Paper Title:  Estimating optimal observer coverage in the Antarctic krill fishery Abstract ... conventional krill trawl vessels fishing in South Georgia (CCAMLR Subarea 48.3) were analysed using variance ... estimate parameters of interest, in this case the mean (or median) krill length and the rate of larval fish ... by-catch. A partial coverage sampling program has been implemented in South Georgia since 2002 ... (% ) T ot al h au ls w it h kr ill sa m pl in g (% ) A ca m ar 20 02 30 7 ... 07 30 8 In su ng H o 20 07 62 9 N iit ak a M ... st in 20 08 71 55 21 38 21 30 10 0 30 A ve ra ge s 62 ... a conservation measure to require observer coverage on 30% of vessels in the 2009/10 fishing ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 139–154 : Auteur(s): Agnew, D.J., P. Grove, T. Peatman, R. Burn and C.T.T. Edwards

4. Assessing the power to detect systematic change in Adélie penguin foraging trip duration

   ice cover as a covariate to explain between-year variation in trip duration increased the power to ... variability among years was greater in the guard stage. Estimates of variability were used to explore the ... Paper Title:  Assessing the power to detect systematic change in Adélie penguin foraging trip ... duration Abstract / Description:  Models of variability in Adélie penguin foraging trip durations were ... 15 20 25 30 213 The power to detect systematic change in Adélie penguin ... no change up to year a (i.e. the pre- impact years) versus the alternative of an increase in mean of ... ), and (iii) the effect size is reached after 30 years (0.75% increase per year; trend change), to ... . 208 gradual trending increase of 0.75% per year over 30 years (i.e. 25% increase after 30 years) is ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 201–215 : Auteur(s): Southwell, C., J. Clarke and L.M. Emmerson

5. A first attempt at an assessment of the Patagonian toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands EEZ

   eleginoides) resource in the Prince Edward Islands EEZ Abstract / Description:  The history of the fishery for ... Patagonian toothfish (Dissostichus eleginoides) in the Prince Edward Islands Exclusive Economic Zone (EEZ) is ... Figure 1: Population model fi ts and 20-year projections in terms of both the spawning and exploitable ... 2018 2021 Year h = 0.35 h = 0.09 21 Patagonian toothfi sh in the Prince Edward Islands ... EEZ Figure 3: Population model fi ts and 20-year projections in terms of the exploitable component of ... sensitivity tests are shown in Table 5, together with those for projections to 2010 and to 2020 under a ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 11–32 : Auteur(s): Brandão, A., D.S. Butterworth, B.P. Watkins and D.G.M. Miller

6. Distribution of krill (Euphausia superba Dana) catches in the South Shetlands and South Orkneys

   in all years 1988 to 1991. In 1987, 1988 and 1991, 75% of the catch in Subarea 48.2 between December ... Paper Title:  Distribution of krill (Euphausia superba Dana) catches in the South Shetlands and ... South Orkneys Abstract / Description:  A set of concentric zones of 20 km width was defined around ... . Krill catches in these zones are shown to have a consistent pattern in Subarea 48.1 but an unpredictable ... sea into concentric zones around the major colonies with radii in 20 km increments. Major colonies ... catch for the split year that was taken in the four months December to March within 100 km of predator ... 400W) was January 1989, and the fishery in this year moved further north, taking place over a bank to ... before this on local scales, and in particular 20 to 60 km from predator colonies. In addition, it is ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 287–303 : Auteur(s): Agnew, D.J.

7. Surveys of breeding penguins and other seabirds in the South Shetland Islands, Antarctica, January-February 1987*

   to have been about 40% overall increase in the chinstrap population in the last 20-30 years, about ... Paper Title:  Surveys of breeding penguins and other seabirds in the South Shetland Islands ... Living Resources Program in 1987 provided data on the number, size, and location of penguin and Antarctic ... blue-eyed shag colonies and the breeding status of other seabirds in the South Shetland Islands ... . Although there appears to have been about 40% overall increase in the chinstrap population in the last 20 ... a jugula ire ait augmente globalement d'a peu pres 40% au cours des dernieres 20-30 annees ... 20-30 anos, aproximadamente tres cuartas partes de la diferencia entre nuestros recuentos y los ... rro rrpeAblAYlI\l1M OlleHKaM. XOTH, KaK Ka)KeTCH, 3a rrOCJIeAHl1e 20-30 JIeT o611\ee KOJII1QeCTBO ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 449-451 : Auteur(s): Shuford, W.D. and L.B. Spear

8. Significant conservation benefits obtained from the use of a new fishing gear in the Chilean Patagonian toothfish fishery

   maximum of 0.36% of the total catch in 2006. The fishers who developed the net sleeve modification called ... Paper Title:  Significant conservation benefits obtained from the use of a new fishing gear in the ... artisanal trotline fishery for Patagonian toothfish (Dissostichus eleginoides) in Chile is described. The ... then compared with similar data obtained in 2002 in the same fleet in the same fishing grounds prior to ... Universidad Austral de Chile who have been working with us in recent years: Keno Olivares, Patricio ... vessels and changes in the fishing season to the time of year in which the birds are absent from the ... ~70–74 cm Ø~30 cm Ø~10–15 cm ~100–120 cm Hooks Snoods ~20 cm ~15 cm ~25 cm Weight 4–8 kg ... -headed albatrosses). No petrel deaths were recorded in that year (2004) in the Chilean toothfish ...

   Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 79–91 : Auteur(s): Moreno, C.A., R. Castro, L.J. Mújica and P. Reyes

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

   in each consecutive mode. This indicates that the modes represented year classes and that one ... fish younger than 3.5 years. Counting translucent zones in the otoliths of D. mawsoni appears to be a ... Paper Title:  Evidence to support the annual formation of growth zones in otoliths of Antarctic ... annually in the otoliths of this species. However, no evidence to validate this assumption has previously ... . 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 ... represented year classes and that one translucent zone is formed annually in otoliths of juvenile D. mawsoni ... year or more after tagging. Otoliths from the recaptured fi sh were embed- ded whole and unbaked in ... of data that was large but lacked any fi sh younger than 3.5 years. Counting translucent zones in ...

   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

10. Low genetic diversity and temporal stability in the Antarctic toothfish (Dissostichus mawsoni) from near-continental seas of Antarctica

    locations, or between samples collected in consecutive years, were observed. These results, based on ... Paper Title:  Low genetic diversity and temporal stability in the Antarctic toothfish ... analysis of the most informative subset of nuclear genetic markers of SNP variation presented in Kuhn and ... Gaffney (2008), do not support genetic differentiation of samples from the Ross Sea. Discrepancies in the ... year to another. This assumption is supported by data from samples from the Ross Sea taken in 2011 ... locations, or between samples collected in consecutive years, were observed. These results, based on ... mawsoni) tagging scheme in the Ross Sea for the years 1997/98 to 2004/05. Document WG-FSA-05/34. CCAMLR ... is restricted to the Convention Area man- aged by CCAMLR. The fishery for D. mawsoni started in the ...

    Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 1–9 : Auteur(s): Mugue, N.S., A.F. Petrov, D.A. Zelenina, I.I. Gordeev and A.A. Sergeev

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