Résultats de la recherche

1. The utilization of seabird censuses for krill monitoring

   Ocean is explored. No variation source directly linked with krill was identified by means of ... capable of detecting changes in bird abundance and/or species composition, associated with three levels of ... application of discriminant analysis. Further developments of the method are possible only with greater ... explored. No variation source directly linked with krill was identified by means of correspondence ... of detecting changes in bird abundance and/or species composition, associated with three levels of ... with greater databases, calling for international cooperation on the subject. Est exploree la ... MONITORING E. R. Marschoff, J.G. Visbeek and L.R. Fontana Instituto Antarctico Argentino Man-induced ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 393-425 : Auteur(s): Marschoff, E.R., J.G. Visbeek and L.R. Fontana

2. Physical oceanographic setting of the Siedlecki January 1987, South Shetland Island data set

   mixing processes of Bransfield Straits water (derived from the Weddell, with further local modification ... the Scotia Front protrudes to the south, perhaps associated with mesoscale structures. The Weddell ... -Scotia Confluence in the Bransfield Straits is associated with abundant krill populations. It is ... population (Marr, 1962). The Weddell Gyre is a large, wind-driven cyclonic gyre, with a transport of 70 to ... discussed above (Figure 3 a,b). Comparison with the large scale water mass distribution (Figure 4) supports ... of the front with the Pacific water. 3. DISCUSSION Besides Pacific water intrusions near 300 ... in the group #3 9/S. The stations with blend B all fall in the 1 000 to 1 500 m bottom depth ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 161-184 : Auteur(s): Gordon, A.L.

3. Phytoplankton distribution in the mixed layer: implication to krill abundance

   104 Figure 4: Same as Figure 3 with N=O.01 rad S-1. 346 Q) o t) V) .c -0) c ~ Figure ... now stands, is highly complex with many degrees of freedom. The basic concept underlying our ... favorably with observations. Since the Eulerian models inherently deal with averaged spatial distributions ... incorporate these complex trajectories into our experimental designs; and we need to cooperate with physical ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 331–356 : Auteur(s): Yamazaki, H. and T.R. Osborn

4. Sources of variance in studies of krill population genetics

   of krill (Lubimova et al., 1985; Mackintosh, 1972, 1973). Many of these concentrations are ... scale of connectedness of these local populations with those in other areas remains to be explored. В ... population studies Early allozyme research did not identify dis- tinct populations of Antarctic krill ... identifi cation of genetic differentiation in several krill species (Table 1) is consistent with other ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 107–116 : Auteur(s): Jarman, S.N. and S. Nicol

5. Growth and age/length structure of populations of Notothenia (Lepidonotothen) squamifrons (Nototheniidae) in various areas of the Indian sector of the Southern Ocean

   paper. It was found that during the first years of life the linear growth rate is 3 to 5 cm per year. It ... decreases by a maximum of 1 cm during the last years of life. Maximum annual weight increments of 100 to 120 ... ). In the 1980s there was a tendency towards a younger fish in catches with 6 to 7 year old specimens ... years of life the linear growth rate is 3 to 5 cm per year. It decreases by a maximum of 1 cm during ... specimens has declined (Figure 3). These changes are associated with a concentration in these years of ... from 3 to 5 cm per year in the first years of life to 1 cm in the last years, dependent upon the area ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 123–139 : Auteur(s): Zaitsev, A.K.

6. Assessment and tag program adaption methods for exploratory fisheries in the CAMLR Convention Area: an example application for Division 58.4.3a

   tagging levels that will produce an expected abundance estimate in the following year of a given precision ... combination of the assessment and tagging rate adaption methods can then form the basis of an early management ... eleginoides) in Division 58.4.3a with catch limit and tag-rate recommendations being made given the assessment ... using a single release event, with a recapture event in the following year/season, as required. As ... given year or years. No dispersion terms were estimated for the recapture event for obvious reasons ... (right) fleets. In years with no catches these will obviously be zero, and 2007 total harvest rate is ... 0.13 with a 10% CV, and for age-at-maturity a value of 13 years with again a CV of 10%. The resultant ...

   Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 101–113 : Auteur(s): Hillary, R.M

7. Line weights of constant mass (and sink rates) for Spanish system Patagonian toothfish longline vessels

   with seabirds. The weights typically used are collections of rocks enclosed in netting bags. During ... fishing operations the netting bags abrade on the seabed causing rocks to be lost and the weights to ... relationship between the sink rates of longlines equipped with bags of rocks (4, 6 and 8 kg) and those with ... steel weights of equivalent masses. The purpose of the experiment was to provide vessel operators with ... mass (Table 3). Although Chilean longlines with steel weights attached were faster to the seabed than ... smoothing splines (with discussion). Appl. Stat., 48 (3): 269–311. Liste des tableaux Tableau 1: Poids ... 40 m intervals on longlines to minimise interactions with seabirds. The weights typically used are ... seabed causing rocks to be lost and the weights to become progressively lighter, requiring ongoing ...

   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. Age and growth of spiny icefish (Chaenodraco wilsoni Regan, 1914) off Joinville–D’Urville Islands (Antarctic Peninsula)

   consisted mainly of adult individuals between 1 and 3 years of age, with very few older fish.   File ... not tested, so that present ageing data haveto be considered with caution. The estimated age range was ... 1–5 years for males and 1–4 years for females of C. wilsoni. Applying the von Bertalanffy (VB ... males. Age-at-sexual maturity was estimated to be about 2 years for females and 2.5 years for males ... age classes 3 and 4, with very few fish aged 2 and 5 years (Cielniaszek, 1981). This appears to be ... to be considered with caution. The estimated age range was 1–5 years for males and 1–4 years for ... years of age, with very few older fish. Résumé L’étude de l’âge et de la croissance de la grande ... exclusively of 1–3 year- old fish, representing approximately 97% of the individuals aged. The analysis of ...

   Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 115–130 : Auteur(s): La Mesa, M., A. De Felice, C.D. Jones, K.-H. Kock

9. Quantifying vessel performance in the CCAMLR tagging program: spatially and temporally controlled measures of tag-detection rates

   individual vessel, but the analysis is later extended to vessel- season (trip), and to vessel-seasons ... years 2000–01 to 2010–11. Document WG-FSA-11/46. CCAMLR, Hobart, Australia: 32 pp. Year of release ... rates, and therefore, including observations from vessels with low detection rates, could lead to an ... design is used to develop an index of relative performance of the detection rate of each vessel with ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 73–80 : Auteur(s): Mormede, S. and A. Dunn

10. Areal and seasonal extent of sea-ice cover off the northwestern side of the Antarctic Peninsula: 1979 to 1996

    with features described by Stammerjohn and Smith (1996) for ice cover in the Bellingshausen Sea ... 6 km 2 /month. This index may be used in conjunction with studies of variability in biological ... four periods of extensive ice cover during the last 18 years. Variability in seasonal timing, areal ... extent, seasonal duration and persistence of sea-ice over multiple years is apparent and is consistent ... 1988 1989 1990 1991 1992 1993 1994 1995 1996 Year Area Covered with Ice 106 km' Figure 3: Areal ... years is apparent and is consistent with features described by Stammerjohn and Smith (1996) for ice ... years. It is anticipated that the annual index may be easily updated with new data, facilitate ... periodicity of five to eight years in ice cover and note a five-year periodicity apparent in the air ...

    Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 65–73 : Auteur(s): Hewitt, R

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