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Observations on haul-out patterns and trends in the breeding populations of southern elephant seal at Península Valdés (Patagonia) and Stranger Point (25 de Mayo - King George I.)
of r between these two years is 0.05, similar to the one estimated for this population by McCann ... Convergence. Most of the breeding places are located on islands, except for the herd found on the coast of ... reason for this decrease. One reason could be the competition with fishing fleets since the onset of ... (van Aarde, 1980). In this paper we present information on the last seven years in two breeding ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 453-463 : Автор(ы): Vergani, D.F., M.N. Lewis and Z.B. Stanganelli
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Note on estimating krill abundance from acoustic data on individual aggregations
superior for the estimation of regional krill abundance and its variance since it is easier to apply ... . An estimator is available for randomly distributed aggregations (Lucas and Seber, 1977), but in ... WG-KRILL-91/20 NOTE ON ESTIMATING KRILL ABUNDANCE FROM ... . It is concluded that the echo-integration approach is superior for the estimation of regional kriU ... kriU density for each Elementary Sampling Distance Unit (ESDU). Finally, the density information is ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 219–223 : Автор(ы): Hampton, I. and D.G.M. Miller
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Editorial
CCAMLR. The continued support for the excellent science submitted to CCAMLR, and published in CCAMLR ... as the more traditional peer-review process. The breadth of information considered by CCAMLR is ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 243
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Marine debris and fishing gear associated with seabirds at sub-Antarctic Marion island, 1996/97 and 1997/98: in relation to longline fishing activity
debris found in association with seabirds at sub-Antarctic Marion Island for the period May 1996 to April ... ; (non-fishing) marine debris over this period. Sixty 'rope nooses' apparently used for ... Prince, 1996). Both unregulated and sanctioned longline fishing for Patagonian toothfish within the 20 ... and B. Watkins, pers. comms). Large body size is also an advantage in the intense competition for ... an anonymous reviewer for comments on earlier drafts of this paper. REFERENCES Ashford, J.R ... association with seabirds at sub-Antarctic Marion Island for the period May 1996 to April 1998 is reported ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 85–96 : Автор(ы): Nel, D.C. and J.L. Nel
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Status of the Polish FIBEX acoustic data from the West Atlantic
variation which has previously been reported for the area and shown to be important. File: 10trathan ... C is (BTOMASS, 1991). an equipment constant (20 dB). MVBS values with time and positional data ... skewed towards -90 dB (see Trathan and Everson, 1994). Density Calculation Density estimates for the ... for the area and shown to be important. Analyse des donnkes acoustiques de la campagne d'evaluation ... , CCAMLR INTRODUCTION CCAMLR has set a precautionary catch limit for Antarctic krill in Area 48 ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 125–132 : Автор(ы): Trathan, P.N., J. Kalinowski and I. Everson
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Choosing distance between acoustic survey tacks
stock exploitation rate and other factors, we have to estimate the biomass with an error 8B~30 ... , ~ , ~,,~" !,I I6~,\ :::::;::""""-1:~:,~ 30~ ~ <: I:' · .. . I·"'t:':::::"............ --=:z"=~ 20% '= I,' 7 ... Krasnoselskaya, 17 Choosing the frequency of survey tacks is an important aspect of acoustic surveying ... tactics. The allowable time for the study of a given area usually determines the choice of distance ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 153-164 : Автор(ы): Kalikhman, I.L., Z.I. Kizner, B.R. Zaripov and W.D. Tesler
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Distribution and relative abundance of juvenile icefish (Champsocephalus gunnari) from a trawl survey of the South Georgia shelf in June–July 1985
the age of one year (O-group), were used for the calculation of abundance indices. Catchability ... ) was employed. This trawl is made of kapron fibre netting with 20-45 mm mesh size with an inside ... a towing speed of 3.5 knots. An echo depth-sounder was attached to the headline for monitoring ... vertical opening was 6 m. The area covered in 30 minutes was 0.004416 square miles. Fishing operations ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 55-63 : Автор(ы): Boronin, V.A., G.P. Zakharov and V.P. Shopov
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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 : Автор(ы): Bengtson, J.L.
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Diurnal variations in biological characteristics of krill, Euphausia superba Dana, to the west of the South Orkney Islands, 24 March to 18 June 1990 - based on data reported by a biologist-observer
trawl (9 to 12 tows per station, over one day). An increase in the total average size of animals caught ... in the catch, as well as an increased difference between average length of males and females in the ... one day). An increase in the total average size of animals caught in periods of light or darkness was ... noted at several stations. Increases in the proportion of males in the catch, as well as an increased ... belong to a single or several statistical sub-populations. This problem is especially so for different ... . superba per haul (for all stations) are given in Figure 2. These data show different average sizes of E ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 201–222 : Автор(ы): Vagin, A.V., R.R. Makarov and L.L. Menshenina
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Genetic variations and population structure of krill from the Prydz Bay region of Antarctic waters
are derived from a single interbreeding population. Note: The full text of this paper is published ... this paper is published under the above title in Polar Biology (1986) ~ : 233-236. VARIATIONS ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 271-273 : Автор(ы): MacDonald, C.M., R. Williams and M. Adams
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