Resultados de la búsqueda

1. Trends in population size and breeding success at colonies of macaroni and rockhopper penguins, Marion Island, 1979/80–1995/96

   penguins (E. chrysocome) between 1985/86 and 1995/96 was measured. For macaroni penguins, averages of 0.48 ... eggs and 0.35 chicks were hatched and fledged respectively for each clutch laid. Corresponding averages ... for rockhopper penguins were 0.68 eggs and 0.48 respectively. The largest of the three macaroni ... penguin colonies investigated decreased in size over the study period, while the other two remained stable ... two species, and for the colonies at Van den Boogaard River (Table 3). On average, macaroni ... influence on these two penguins at different stages of the reproductive cycle - before or at laying for ... a significant correlation in overall breeding success at these two localities. Implications for ... breeding parameters for two closely related species of penguin at Marion Island shown in this paper also ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 89–103 : Autor(es): Cooper, J., A.C. Wolfaardt and R.J.M. Crawford

2. Biomass of myctophids in the Atlantic sector of the Southern Ocean as estimated by acoustic surveys

   surveyed in two stages. Firstly, the area from 51 °30' to 56°00'S and between 20°30' and 26°30'W was ... Table 1. An oscilloscope was used to monitor input signals and an "Iskra-226" computer was used for ... . Specimens of 70 to 80 mm predominated. An echometric survey for myctophids, carried out from 18 to 31 ... February 1988 an echometric survey for myctophids was conducted in the Polar Frontal Zone from 48° to 51 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 417–431 : Autor(es): Filin, A.A., K.V. Gorchinsky and V.M. Kiseleva

3. Southern elephant seals and CCAMLR

   research findings of primarily South African (including some French and Australian results) studies on the ... been recently confirmed for the Macquarie Island stock. The availability of food, competition with ... feeding ground, not yet identified, exists and that this exerts some common influence on the species ... it is hoped that this will help to elucidate the reasons for the observed decline of M. leonina  in ... to lIes Kerguelen however, suggest a two-way directional migration for at least part of the ... primarily South African (including some French and Australian results) studies on the southern elephant ... recently confirmed for the Macquarie Island stock. The availability of food, competition with rapidly ... ground, not yet identified, exists and that this exerts some common influence on the species ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 465-473 : Autor(es): Bester, M.N. and D.G.M. Miller

4. Long-term trends in the foraging patterns of female Antarctic fur seals at South Georgia

   number of feeding trips, with 1979 being the year with the fewest trips made during the entire 20 year ... ) the number of feeding trips made by an individual’'s mother during lactation. This analysis ... teeth from Bird Island, South Georgia, was analyzed to estimate: 1) birth year of individuals, and 2 ... feeding trips, with 1979 being the year with the fewest trips made during the entire 20 year period ... number of feeding trips made by an individual's mother during lactation. This analysis showed that ... voyages ont ete les moins nombreux sur la periode de 20 ans. Sous presse dans Sahrhage, D. (ed ... viajes hechos durante todo el periodo de 20 anos. En prensa en: Sahrhage, D. (ed). Antarctic Ocean and ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 441-443 : Autor(es): Bengtson, J.L.

5. Surface areas of seabed within the 500 m isobath regions within the South Shetland Islands (Subarea 48.1)

   Islands (Subarea 48.1) Abstract / Description:  Bathymetric maps of two major areas within the South ... Elephant Island. From the integrated datasets, areas of seabed within the 500 m isobath for six levels of ... calculated based on planar and interpolated surface area of seabed incorporating seafloor slope. Differences ... contained information on surface area, slope and aspect for each polygon (Table 1). Finally, seafloor ... SURFACE AREAS OF SEABED WITHIN THE 500 M ISOBATH FOR REGIONS WITHIN THE SOUTH SHETLAND ISLANDS (SUBAREA ... . 92038, USA Abstract Bathymetric maps of two major areas within the South Shetland Islands were ... integrated datasets, areas of seabed within the 500 m isobath for six levels of depth strata (0-50 m, 51-100 ...

   Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 133–140 : Autor(es): Jones, C.D., S.N. Sexton and R.E. Cosgrove III

6. Indices of prey availability near the Seal Island CEMP site: 1990 to 1996

   prey density, depth, distance from Seal Island, and persistence over time. Acoustic data from two AMLR ... surveys each year were subsampled to include the foraging range of predators breeding at Seal Island ... relative biomass of juvenile krill near Seal Island during the first survey of each year as compared to the ... biomass of post-spawning adults near Seal Island during the second survey of each year. It is hoped that ... (Figures 3 and 4). Two surveys were selected for each year, details of which are listed in Table 1. For ... prey availability relative to kriil predators greeding on Seal Island. shipboard computer for ... Seal Island, and persistence over time. Acoustic data from two AMLR surveys each year were subsampled ... for each year. Designation 3 and 4 D D D D D D Dates 6 - 11 Jan, 21 - 26 Jan 21 - 31 ...

   Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 37–45 : Autor(es): Hewitt, R.P., G. Watters and D.A. Demer

7. Revised estimates of the area of the South Georgia and Shag Rocks shelf (CCAMLR Subarea 48.3)

   should be used for future assessments and for assisting with the stratification of surveys. File ... known to be unreliable, particularly for the areas to the south of South Georgia, as they rely on ... estimates obtained from the two datasets. The best agreement was for grid squares to the north of South ... . North east corner °S °W 0– 50 50 –1 00 10 0– 15 0 15 0– 20 0 20 0– 25 0 25 0– 30 0 30 0 ... 0 15 57 47 26 20 12 8 185 18 54.5 38 0 0 19 634 690 282 130 92 63 76 1 986 19 54.5 37 28 30 270 847 ...

   Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 167–175 : Autor(es): Belchier, M. and P. Fretwell

8. Preliminary results of research activities of RV Evrika in the Scotia Sea in January-March 1988

   Sea and adjacent waters, accompanied by regular trawlings with an Isaac-Kidd trawl. The waters off ... in areas of the Atlantic Sector of the Southern Ocean identified for monitoring by CCAMLR. During the ... the east Scotia Sea a higher abundance of primary production was registered. The analysis of data on ... '~'-- ---''''''~ Geostrophic circulation on the surface in relation to 1 000 decibar (20 January-9 March 1988). 'I 14 ... an Isaac-Kidd trawl. The waters off South Georgia in particular were surveyed twice. Research ... identified for monitoring by CCAMLR. During the observation season the zonal drift of waters of the ... primary production was registered. The analysis of data on phytoplankton, zooplankton and krill ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 215-229 : Autor(es): Maklygin, L.I., A.S. Fedorov, V.N. Shnar, Yu.A. Shulyakovsky, I.V. Krasovsky, Yu.D. Shuvaev and A.V. Kromsky

9. Patterns and processes in the distribution and dynamics of Antarctic krill

   models of increasing complexity be developed iteratively for variability and patchiness of krill ... critical processes to be added. An analysis of spatial distribution of krill in the Bransfield Strait area ... attraction of krill to account for the small-scale aggregations. File:  07-Levin-et-al.pdf ... physical factors as providing an adequate explanation of the fluorescence spectrum at least on ... intermediate scales (4-20 km). It is unfortunate that we do not yet have available comparable data for the ... DISTRIBUTION Quantitative descriptions of krill spatial distribution are necessary for two purposes. The ... has a minimal effect on algal spatial distribution. In contrast, a purely physical model for krill ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 281–299 : Autor(es): Levin, S.A., A. Morin and T.M. Powell

10. By-catch of fish in longline catches off the Kerguelen Islands (Division 58.5.1) during the 1995/96 season

    cruise and an experimental deep-sea longline fishing cruise targeting Patagonian toothfish (Dissostichus ... at the limit of their bathymetric range. An abundance index was used to show bathymetric and ... in use on only two fishing grounds (Kerguelen and Macquarie Islands). Statistical and biological ... squid and set on the bottom for 7 to 12 hours, were used. All 145 sets, including by-catch ... identification carried out composition, with the target species comprising for the two species of skates. The ... differences in length were observed in the distributions of the two species of skates. For B . ivvasa ...

    Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 175–193 : Autor(es): Duhamel, G., P. Pruvost and D. Capdeville

Páginas