Resultados de la búsqueda
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Trends in entanglement of Antarctic fur seals (Arctocephalus gazella) in man-made debris at South Georgia
. Consequently, the authority responsible for the management of Southern Ocean marine resources (CCAMLR) actively ... campaigned for compliance with the MARPOL provisions relating to waste disposal at sea, and for cutting of ... any material unavoidably jettisoned which could form collars to entangle seals. Five subsequent years ... incidence has been halved in recent years. However, the South Georgia fur seal population has approximately ...
Meeting Document : SC-CAMLR-XV/BG/03 : Autor(es): Delegation of the United Kingdom
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Age distribution of breeding female Antarctic fur seals in relation to changes in population growth rate
1971-1973 was 7.41 (SE = 0.26) years and in 1988 it was 6.93 (SE = 0.20) years. After correction for ... age-dependent arrival time at the pupping beach in 1988, the mean age was 6.22 (SE = 0.14 years ... -1972. Exponential models fitted to the frequency distribution of age-classes greater than age 5 years ... and corrected for the rate of increase of the population gave adult survival rates of 0.66 (SE = 0.03 ...
Meeting Document : WG-CEMP-91/21 : Autor(es): I.L. Boyd, N.J. Lunn, P. Rothery and J.P. Croxall (United Kingdom)
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Feasibility of trawl surveys to estimate abundance of juvenile toothfish in Subarea 88.1
conducting trawl surveys for juvenile toothfish in Subarea 88.1 (Ross Sea). Potential problems including a ... and previous research cruises. The major limitation on a trawl survey in the Ross Sea is ice cover. On ... average over the last three years, 63% of the seabed area from 0–600 m depth was not fishable in January ... –February because of ice. Ice cover varied greatly between years, with the untrawlable area ranging from 31 ...
Meeting Document : WG-FSA-SAM-04/07 : Autor(es): Wood, B.A., ODriscoll, R.L., Hanchet, S.M.
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Reproduction in the mackerel icefish (Champsocephalus gunnari) at South Georgia
underlying cause is probably due to a shortage of krill, an important dietary item for Champsocephalus ... regression and resorption at least two months prior to the normal spawning date. It is concluded that the ...
Meeting Document : WG-FSA-91/07 : Autor(es): I. Everson (United Kingdom), K.-H. Kock (Germany), G. Parkes (United Kingdom), D. Cielniaszek and J. Szlakowski (Poland)
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Factors affecting the number and mortality of seabirds attending trawlers and longliners in the Kerguelen area
mainly according to the year, the cloud cover and the presence of offal for long-liners. The dumping of ... ), based on observations carried out onboard by dedicated observers. Twenty-four species of seabirds were ... season whereas it was the reverse situation for giant petrels and cape petrels. Four species of birds ... successful with an overall figure of 0.47 birds / 1.000 hooks. No albatross except one was caught when the ...
Meeting Document : WG-FSA-99/26 : Autor(es): H. Weimerskirch, D. Capdeville and G. Duhamel (France)
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Depth distribution and spawning pattern of Dissostichus eleginoides over the winter period in Subarea 48.3
relation to their size, an approximately linear relationship existing between depth and fish length. A ... Shag Rocks and South Georgia, but there is some evidence for exchange of animals immediately post ... spawning between the two areas. There may be two (or more) spawning periods during the winter, with the ... seasons, suggesting movement of animals both up and down slope at particular times of year. Months with a ...
Meeting Document : WG-FSA-98/58 : Autor(es): D.J. Agnew, K. Kerkieta, L. Heaps, C. Jones, J. Pearce and A. Watson (United Kingdom)
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Testing early life connectivity using otolith chemistry and particle-tracking simulations
complement, the two techniques promise an innovative approach to generate and test predictions, and resolve ... areas on the Antarctic Peninsula. At South Georgia, the nucleus chemistry was similar between the ... chemistry, simulations of the large-scale circulation predicted that particles released at 100-300m depth on ...
Meeting Document : WG-FSA-10/P02 : Autor(es): J. Ashford, M. La Mesa, B.A. Fach, C. Jones and I. Everson
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Mean circulation and hydrography in the Ross Sea sector, Southern Ocean: representation in numerical models
hydrography. Two were climate models of low (1°) to intermediate resolution (1/3°), and one was an operational ... 900m at the gyral eastern end compare favourably with float data. On-shelf model depth-averaged west ... Front and on-shelf deep water formation, and these models transport some 4 Sv of this bottom water ...
Meeting Document : WG-EMM-10/P13 : Autor(es): G.J. Rickard, M.J. Roberts, M.J.M. Williams, A. Dunn and M.H. Smith (2010)
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Preliminary results from the International Synoptic Krill Survey in Area 48, 2019
stations. Acoustic transects and trawling were carried out as per survey procedures developed in 2018 ... , which were based on the methods and procedures used in the CCAMLR 2000 krill acoustic survey ... August 2018. Author(s): G. Macaulay, G. Skaret, T. Knutsen, O.A. Bergstad, B. Krafft, S. Fielding, S.G ... Document Release Consent: No Delegation responsibility for releasing documents: Norway ...
Meeting Document : WG-EMM-2019/47 : Autor(es): G. Macaulay, G. Skaret, T. Knutsen, O.A. Bergstad, B. Krafft, S. Fielding, S.G. Choi, S. Chung, K. Demianenko, V. Podhornyi, K. Vishnyakova, L. Pshenichnov, A. Chuklin, A. Shishman and M.J. Cox
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Microincrement analysis in otoliths of Notothenia rossii fingerlings from the South Shetland Islands to estimate early life history timings and to validate annulus formation
other nototheniids within similar size range. Based on the early life events associated with the two ... hatching periods in N. rossii, two main types of life cycles are hypothesised for South Shetland Islands ... Abstract: In this study, otolith microstructure analysis on 7 blue phase fingerlings and 26 brown ... to 2010 at Potter Cove, South Shetland Islands, allowed to provide insights on early life history ...
Meeting Document : WG-FSA-12/04 : Autor(es): E. Barrera-Oro (Argentina) and M. La Mesa (Italy)