Résultats de la recherche
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Pup production and distribution of breeding Antarctic fur seals (Arctocephalus gazella) at South Georgia
in the 1950s and 1960s. Increased population size has led to an expansion of the breeding range at ... Abstract: A census of the breeding population of Antarctic fur seals (Arctocephalus gazella) at ... South Georgia was carried out during the 1990/91 breeding season. Using counts of adult females ashore ... at the breeding grounds during the pupping period, together with corrections for the likelihood of a ...
Meeting Document : WG-CEMP-92/39 : Auteur(s): I.L. Boyd (United Kingdom)
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Temporal variation in Antarctic sea-ice: analysis of a long-term fast-ice record from the South Orkney Islands
Abstract: Detection of climate-induced change in marine ecosystems requires a knowledge of the ... underlying variability of the environment. This paper uses a range of datasets to investigate the interannual ... variability in Southern Ocean sea-ice dynamics. We present the first analysis of a series of fast-ice duration ... indicate that there has been a long term decline in the duration of sea-ice at the South Orkney Islands in ...
Meeting Document : WG-EMM-95/80 : Auteur(s): Symon, C., Murphy, E.J., Priddle, J., Clarke, A.
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On the problem of icefish (Champsocephalus gunnari) vertical migration on the South Georgia shelf
the maximum catches were available at the middle of the light hours of the day. At twilight the fish ... Abstract: The results are presented of studying icefish vertical migration based on the data of R ... /V cruises during the seasons of 1982-83, 1983-84 and 1986-87, when this species was highly abundant ... concentrations migrate into the water column and the catches greatly decrease. The direct observations of icefish ...
Meeting Document : WG-FSA-91/06 : Auteur(s): J.A. Frolkina and V.I. Shlibanov (USSR)
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Approaches to evaluating and testing of CEMP methods for parameters A1, A5 and A7
description of foraging trip duration using the mean arising from a bimodal distribution of trip durations may ... Abstract: The methods and presentation of CEMP parameters A1, A5 and A7 where evaluated using ... simulated time-series data. The effects of sampling timing and intensity during five-day periods for ... measures of arrival and fledging mass suggested that situations where sampling is distributed unevenly ...
Meeting Document : WG-EMM-04/60 : Auteur(s): G. Watters (USA) and K. Reid (United Kingdom)
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Comparison of equal-area cylindrical and circular piston transducers
index and on-axis sensitivity loss due to curvature of the cylindrical transducers, referred to as the ... curvature loss. Under identical conditions of excitation, isotropic ambient noise, and detection threshold ... Abstract: Design of sondes for in situ measurement of zooplankton or other scatterers requires ... choosing among alternative transducer geometries. This contribution addresses the problem of choosing ...
Meeting Document : WG-EMM-95/08 : Auteur(s): Foote, K.G.
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Age distribution of breeding female Antarctic fur seals in relation to changes in population growth rate
-1972. Exponential models fitted to the frequency distribution of age-classes greater than age 5 years ... Abstract: The age distribution of breeding female Antarctic fur seals at Bird Island, South ... Georgia, in 1988 was compared with the age distribution of a sample obtained in 1971-1973. The mean age in ... ), which was significantly lower than in 1971-1973. Indicators of population size suggested that population ...
Meeting Document : WG-CEMP-91/21 : Auteur(s): I.L. Boyd, N.J. Lunn, P. Rothery and J.P. Croxall (United Kingdom)
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Analysis of the Chilean operation in the Antarctic krill fishery, years 2017/18
of the ship between extraction zones during each fishing trip are described Author(s): P.M. Arana ... Abstract: This paper provides a summarized description and analysis of the activities carried out ... by the Chilean krill fishing ship Antarctic Endeavour throughout its first year of operation (2017 ... the production of krill meal. Effort, catch and CPUE, and the length frequency distributions of ...
Meeting Document : WG-EMM-2019/09 : Auteur(s): P.M. Arana and R. Rolleri
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Seasonal variation in acoustic estimates of krill density at South Georgia during 2001/2002
(middle), and one in May 2002 (late). The surveys were the second in a five-year series of observations ... Abstract: Four separate acoustic surveys of Antarctic krill (Euphausia superba) were conducted ... designed to complement and extend an existing time series of summer surveys maintained by the British ... South Georgia have revealed a similar pattern of change to that observed in 2000/2001 and highlight the ...
Meeting Document : WG-EMM-02/39 : Auteur(s): C. Goss, S.A. Grant, N. Cunningham, J.L. Watkins, P.N. Trathan, E. Murphy and K. Reid (United Kingdom)
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RESULTS OF THE RESEARCH PROJECT TO DIGITIZE HISTORICAL SOVIET KRILL FISHING EXPEDITION DATA
expeditions in Southern Ocean between the years of 1972-1991. The main purpose of these expeditions was to ... commercial expedition’s data has been realized in Ukraine at the Southern Research Institute of Marine ... Fisheries and Oceanography of the Ukraine State Fishery Committee and at the Taras Shevchenko National ... University of Kyiv. This valuable set of krill data was collected during Soviet Union krill-fishing ...
Meeting Document : CCAMLR-XXVIII/BG/18 : Auteur(s): Delegation of Ukraine
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CEMP camera installations by Ukraine at the Galindez, Petermann and Yalour Islands penguin colonies as a part of CEMP Fund project ‘Establishing a CEMP camera network in Subarea 48.1’
monitor pengiune nests for breeding success and chronology. Cameras have been installed in the middle of ... Station area on installation CEMP cameras in penguin colonies as part of the CEMP project run by USA ... breeding season due to late arrival and hard ice conditions in Argentine Islands area. In time of cameras ... sequences for all breeding activity the next season in 2016/2017. The training of winterers-biologists has ...
Meeting Document : WG-EMM-16/55 : Auteur(s): Delegation of Ukraine