Resultados de la búsqueda
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Revised outline of the dedicated krill survey for CCAMLR Division 58.4.1 during 2018/19 season by the Japanese survey vessel, Kaiyo-maru
conducted by Japanese research vessel, Kaiyo-maru. No krill biomass has been estimated in the Division since ... Australia carried out BROKE in 1996. There are two main objectives of our survey: (1) estimation of krill ... biomass to update B(0) in the area and (2) oceanographic observations in the area to detect long term ... the CCAMLR standard protocol. Utility of 70 kHz in addition to 3 standard frequencies (38, 120 and 200 ...
Meeting Document : SG-ASAM-18/03 : Autor(es): H. Murase, K. Abe, R. Matsukura, H. Sasaki and T. Ichii
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Time series of Drake Passage Oscillation Index (DPOI) from 1952 to 2005, Antarctica
Abstract: An assessment of the environmental processes influencing variability in the recruitment ... and density of Antarctic krill (Euphausia superba DANA) is important as variability in krill stocks ... affects the Antarctic marine ecosystem as a whole. Naganobu et al. (1999) had assessed variability in ... krill recruitment and density in the Antarctic Peninsula area with an environmental factor; strength of ...
Meeting Document : WG-EMM-05/17 : Autor(es): M. Naganobu and K. Kutsuwada (Japan)
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Seabird mortality and the Falkland Islands trawling fleet
, trawling and hauling operations for 157 days onboard finfish trawlers in the Falkland Islands in 2002/03 ... of these birds become impaled on a splice in the cable, which was situated on average around 50-100m ... from the waters surface, and are subsequently hauled onboard. In over 600 observed hauls in 2001-03 no ...
Meeting Document : WG-FSA-03/91 : Autor(es): B.J. Sullivan, T.A. Reid, L. Bugoni and A.D. Black (United Kingdom)
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EXPLORING THE ROBUSTNESS OF THE CURRENT TOOTHFISH SPP. HARVEST CONTROL RULES AND POTENTIAL EXPLOITATION RATE-BASED ALTERNATIVES
Abstract: In this paper a simple biomass dynamic population model is used as a paradigm for the ... dynamics of toothfish spp. in the CCAMLR area. This model underpins a management strategy evaluation ... framework where the process of stock assessment, TAC calculation and implementation and potential changes in ... current harvest control rule employed for assessed stocks of toothfish spp. in the convention area is ...
Meeting Document : WG-SAM-09/14 : Autor(es): R. Hillary (United Kingdom)
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An interpretation of the growth of the Adelie penguin rookery at Cape Royds, 1955-1990
Abstract: The population dynamics of the Cape Royds rookery were modelled by computer, in order ... to determine the probable causes of the dramatic increase since 1980 in the numbers of Adelie ... penguins, Pygoscelis adeliae, breeding in the Ross Sea region, Antarctica. Variations in the extent of sea ... probably the result of a recent warming of the Ross Sea climate. Published in: New Zealand Journal of ...
Meeting Document : WG-CEMP-92/21 : Autor(es): N. Blackburn (Denmark), R.H. Taylor and P.R. Wilson (New Zealand)
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Manual: estimating the age of Patagonian toothfish (Dissostichus eleginoides) using transverse cross-sections of otoliths
noted in the growth parameters being used for assessments of toothfish. To assess whether these ... nations participated in a Workshop in 2001 at Old Dominion Unversity with the primary aim of seeking ... conformity in estimating age of Patagonian toothfish (Dissostichus eleginoides). Arising from the workshop ... in reading otoliths; quality assurance and control; and the use of reference sets to monitor ...
Meeting Document : WG-FSA-10/15 : Autor(es): K. Underkoffler, N. Ramanna and J. Ashford (USA)
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Application of continuous time Markov chains to modelling animal movement: estimation of movement rates and retention times for Patagonian toothfish
Abstract: The study of animal movement and distribution has been a central focus in ecology since ... little application in data analyses or prediction in studies movement. Here we develop a continuous time ... apply the model to estimate the equilibrium distribution of Patagonian toothfish in the region around ... Heard and MacDonald Islands in the Australian Antarctic zone using to mark-recapture data from the ...
Meeting Document : WG-FSA-SAM-06/16 : Autor(es): C. Wilcox, M. Bravington and D. Peel (Australia)
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Development of the Southern Ocean Continuous Plankton Recorder survey
Abstract: The Continuous Plankton Recorder (CPR) Type I was first used in Antarctic waters during ... the 1925–1927 Discovery Expedition, and has been used successfully for 70 years to monitor plankton in ... , seasonal, interannual and long-term variability in zooplankton abundance, species composition and community ... separate temporal and geographical variation in the data. Hence, CPRs are now also towed on the Japanese ...
Meeting Document : WS-BSO-07/P4 : Autor(es): Hosie, G., M. Fukuchi and S. Kawaguchi
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Mackerel icefish size and age at South Georgia and Shag Rocks
in the Southern Ocean have supported a fishery since the 1970s. This study has analysed the length ... between 1987 and 2002. Most surveys were between December and February (summer), with one in September ... modality in the length-frequency distributions. Lengths of age-classes derived by these two methods were ... differences in mortality between localities. To compensate for variation in the time of surveys, the mean TL ...
Meeting Document : WG-EMM-03/7 : Autor(es): A.W. North (United Kingdom)
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Report on attendance at the Fifth Meeting of the Committee for Environmental Protection Under the Madrid Protocol
Abstract: This report outlines the participation of the SC-CAMLR Chair in the Fifth Meeting of ... of specially protected species in Antarctica. The CEP agreed with the two paper’s conclusion that the ... IUCN Red List criteria should be used as the basis for the assessment of the status of species in ... Antarctica. SCAR offered to undertake, in conjunction with the IUCN, an assessment of the status of well ...
Meeting Document : CCAMLR-XXI/BG/08 : Autor(es): Chair of the CCAMLR Scientific Committee