Résultats de la recherche

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

   constructed and fitted to data collected at Béchervaise Island over a 12-year period when only natural ... or trips sampled diminished rapidly when sample sizes were greater than 30 penguins and three trips ... scales of days to weeks, because of the high level of natural between-year variation, it would take many ... ice cover as a covariate to explain between-year variation in trip duration increased the power to ... ), 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 ... number of impact (step, ramp and trend increases of 25%) and monitoring (1–10, 15, 20, 25 and 30 years ... –10, 15, 20, 25 and 30 years of post-impact ...

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

2. Seabird interactions with longlining operations for Dissostichus eleginoides around South Georgia, April to May 1994

   -seven line sets were observed and 98 deaths of seabirds were recorded over 20 sets; no deaths occurred ... albatrosses. The average mortality rate for the 20 sets was 0.48 birds/1 000 hooks and maximum mortality 3.12 ... each species in the vicinity of the ship was recorded every 30 minutes. Of the 20 sets for which ... Georgia (sets 5 to 15) during night-time setting. These occurred in aggregations of 20 to 30 birds ... deaths of seabirds were recorded over 20 sets; no deaths occurred during hauls. The 16 sets made at ... albatrosses. The average mortality rate for the 20 sets was 0.48 birds/l 000 hooks and maximum mortality ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 111–121 : Auteur(s): Ashford, J.R., J.P. Croxall, P.S. Rubilar and C.A. Moreno

3. Length-at-age in juvenile Patagonian toothfish (Dissostichus eleginoides)

   observed in the length density represent different age cohorts separated by one year. File:  01ashford.pdf ... estimated to be from fish 1+ or 2+ years old, with mean total lengths of 32.5 cm and 41.3 cm respectively ... + 14+ 20 4 25 2 30 12 1 35 102 7 40 6 33 45 1 65 3 50 5 3 55 7 1 60 2 9 3 65 2 5 1 70 2 1 1 70+ 1 1 ... year’s translucent zone). Total length (cm) 10 20 30 40 ... 50 60 70 80 90 Fr eq ue nc y 40 30 20 10 0 ... taken off South Georgia in January 2000. Age 0+ Age 1+ Age 2+ Age 3+ Age 4+ 40 30 20 10 0 40 ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 1–10 : Auteur(s): Ashford, J., C. Jones, S. Bobko and I. Everson

4. Analysis of the diet of Champsocephalus gunnari at South Georgia in late summer from 1994 to 1997, Dr Eduardo L. Holmberg surveys

   well as fish, was only occasional or negligible and varied from year to year. The spatial distribution ... /without food in Subarea 48.3, did not show a consistent pattern from year to year.  Likewise, in the four ... and Thysanoessa sp., which are known to be important alternative food in years of krill scarcity, as ... years of krill scarcity), intermediate in 1995 (below years of historically high abundance), and high in ... fish (ranges 12-20 cm/l-2 years) was found in the catches during the RV Dr Eduardo L. Holmberg ... 30 years, even lower than in 1977/78 and 1991, years of krill 'shortage' (Figures 2 and 3) (Kock et ... four years, while krill biomass densities were comparable with those in the previous year and were ... and varied from year to year. The spatial distribution of the main prey items in the diet of C ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 103–123 : Auteur(s): Barrera-Oro, E., R. Casaux and E. Marschoff

5. Effects of different harvesting strategies on the mackerel icefish Champsocephalus gunnari around South Georgia

   the mackerel icefish (Champsocephalus gunnari) have been simulated for a period of 30 years. These ... constant levels of fishing mortality to the strength of the incoming year class. An increase of F, however ... 50% F 0.1 with F increasing three or five years after a good recruitment; pulse fishing at an ... interval of three years with no fishing in between; and changes in net selectivity resulting in a shift in ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 77–100 : Auteur(s): Köster, F.W. and K.-H. Kock

6. Marine mammals and demersal longline fishery interactions in Crozet and Kerguelen Exclusive Economic Zones: an assessment of depredation levels

   together. An extensive photo-identifi cation effort, primarily focussing on killer whales, allowed a total ... interacting was 8.2 ± 4.7 (n = 552, range 1–20) and 4.1 ± 3.4 (n = 737, range 1–30) individuals respectively ... sector and marine mammal species. 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 11 12 13 14 15 16 17 ... sperm whales Fishing sector Le ve l o f i nt er ac tio n 90% 80% 70% 60% 50% 40% 30% 20 ... identifi ed on 23 different occa- sions). 0 5 10 15 20 25 30 2 3 4 5 6 7 8 9 10 11 12 13 14 20 21 ...

   Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 67–82 : Auteur(s): Roche, C., C. Guinet, N. Gasco and G. Duhamel

7. Information on the status of fjord Notothenia rossii, Gobionotothen gibberifrons and Notothenia coriiceps in the lower South Shetland Islands, derived from the 2000–2006 monitoring program at Potter Cove

   sampling period of 24 years which began in 1983, and at Harmony Cove in the summers of 2001to 2003. The ... ) Notothenia rossii, total catches Years 19.8835 20 0.994173 14.6162 <0.00001 Error 59.3803 873 0.068019 ... (b) Gobionotothen gibberifrons, total catches Years 9.8124 20 0.49062 42.9468 <0.00001 Error 9.9731 ... 873 0.01142 (c) Notothenia coriiceps, total catches Years 32.4684 20 1.623422 11.8377 <0.00001 ... Error 119.7232 873 0.137140 (d) Notothenia rossii, relative catches Years 53439.18 20 2671.959 ...

   Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 83–87 : Auteur(s): Barrera-Oro, E.R. and E.R. Marschoff

8. Improving estimates of Adélie penguin breeding population size: developing factors to adjust one-off population counts for availability bias

   1 Nov 16 1 Dec 16 1 Jan 16 1 Feb 16 0. 0 0. 2 0. 4 0. 6 0. 8 1. 0 0 10 20 30 40 50 60 ... Camera 2 16 1 Nov 16 1 Dec 16 1 Jan 16 1 Feb 16 0. 0 0. 2 0. 4 0. 6 0. 8 1. 0 0 10 20 30 40 50 ... 16 1 Feb 16 0. 0 0. 2 0. 4 0. 6 0. 8 1. 0 10 20 30 40 50 60 C ou nt Date A O n es t a ... va ila bi lit y ad ju st m en t f ac to r 60 50 40 30 20 10 0 C ou nt 50 40 30 20 ...

   Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 229–241 : Auteur(s): Southwell, C., J. McKinlay, L. Emmerson, R. Trebilco and K. Newbery

9. Mesopelagic fish of the Southern Ocean - summary results of recent Soviet studies

   and the Antarctic Convergence areas (between 20° and 30°W) had statistically different length (SL ... year, together with specific features of the reproduction of myctophids, are major factors ... (Konstantinova, 1987, Atlantic sector). Growth rates during the first two years of life were found to be 30 to ... distributed and abundant, with more than 20 species found in the area. Most of them have a circumpolar ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 433–457 : Auteur(s): Sabourenkov, E.N.

10. Growth and natural mortality of Patagonian rockcod (Patagonotothen guntheri shagensis) from Shag Rocks shelf

    Patagonian rockcod were found to be 2.5 years and 12.6 cm. File:  09-Shilbanov.pdf ... of 2 to 5 years are most abundant. Sexual maturity is attained by fish at 11 to 13 cm length, 20 to ... 30 g weight and age of 2 to 3 years. The sex ratio of fish is actually the same in all size classes ... - t' mean age of fish, 3.42 years age of year class which is fully represented in catches and does ... years The analysis of the age composition curve shows that not all two year old fish were represented ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 111–121 : Auteur(s): Shlibanov, V.I.

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