Resultados de la búsqueda
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Selectivity-induced bias in growth parameter estimates
Abstract: A short simulation study has been carried out to investigate the size of the bias in ... estimates of growth parameters resulting from fish of different sizes having different probabilities of ... producing considerably lower estimates of L? and higher estimates of K than in the true population. The ...
Meeting Document : WG-FSA-SAM-05/19 : Autor(es): G.P. Kirkwood (United Kingdom)
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CCAMLR-IWC Export Group Report: Primary Productivity and Phytopalnkton
SeaWiFS and MODIS sensors that have been providing data for the last ten years. The characteristics of ... their use in the Southern Ocean. A brief history of algorithms linking ocean color to primary ... regional, carbon-based approaches. Using monthly climatologies of SeaWiFS chlorophyll, a phenology of ... phytoplankton blooms is presented for the major provinces surrounding Antarctica. Some of the published ...
Meeting Document : CCAMLR-IWC-WS-08/13 : Autor(es): Matear, R., Mongin, M., Lovenduski, N., Strutton, P.
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Commercial krill fisheries in the Antarctic 1973–1988
Abstract: STATLANT data reported to the Commission for the Conservation of Antarctic Marine ... peak of some 500 000t in 1981/82 before droping to a low level in 1983/84 and stabilising at about 400 ... 000t thereafter. Indications are that in terms of both catch and effort the Soviet and Japanese ... fisheries in Statistical Sub-areas 48.1, 48.2 and 48.3 dominate exploitation of krill in the CCAMLR ...
Meeting Document : SC-CAMLR-VIII/BG/11 : Autor(es): Delegation of South Africa
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The SCAR Antarctic digital topographic database
Abstract: The Antarctic digital topographic database is the outcome of a truly international ... collaborative project between 11 nations. Data capture was co-ordinated in the UK, under the auspices of the ... number of satellite images (mostly Landsat photographic products). Editing and harmonization of the data ... derived from the different sources has produced a seamless map of Antarctica which has the most up-to-date ...
Meeting Document : SC-CAMLR-XII/BG/16 : Autor(es): Delegation of United Kingdom
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Change-in-ratio and index-removal methods for population assessment and their application to snow crab (Chionoecetes opilio)
composition, in order to use these methods. We use the methods to estimate the population of legal-size snow ... of pre-recruits but this requires the assumption of equal catch ability of all animals, a condition ... seem to be ideally suited for studies of many populations of large crustaceans. Author(s): X. Xu, E.G ...
Meeting Document : WS-CRAB-93/10 : Autor(es): X. Xu, E.G. Dawe and J.M. Hoenig (USA)
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Outline proposal for geographic information services for CCAMLR
-of-the-art capacity for managing spatial data for CCAMLR, particularly the types of information ... handling geographic information, and a phased handover of system development and maintenance to the ... Secretariat. BAS is well-placed to offer these geographic information services, with over 10 years of ... staged approach involving different levels of complexity and commitment. At this stage the document only ...
Meeting Document : WG-EMM-12/70 : Autor(es): Submitted by the Secretariat on behalf of Adrian Fox, British Antarctic Survey (United Kingdom)
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Surface exchange between the Weddell and Scotia Seas
Abstract: Within Drake Passage, the southern flank of the Antarctic Circumpolar Current (ACC ... ) hosts the ventilation of deep water, the injection of Antarctic shelf waters and interactions between ... westward and eastward boundary cur rents. This exchange is explored through the trajectories of forty ... transport pathways between the eastern Antarctic Peninsula and sites of elevated chlorophyll in the Scotia ...
Meeting Document : WG-EMM-14/P03 : Autor(es): A.F. Thompson and M.K. Youngs
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Expanding Antarctic seabird monitoring in east Antarctica using a remote camera network: potential use for monitoring for feedback management
Abstract: Antarctic seabirds are important indicators of impacts and change in Southern Ocean ... over long periods in the harsh Antarctic environment, (2) identify the timing of important breeding ... events (phenology), (3) provide accurate estimates of breeding success, (4) standardize population counts ... made at sub-optimal times, and (5) through a network of cameras, quantify spatio-temporal variation in ...
Meeting Document : WG-EMM-14/27 : Autor(es): C. Southwell and L. Emmerson (Australia)
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The krill distribution in waters around the South Shetland Islands: Preliminary results from an acoustic survey conducted by a Chinese krill fishing vessel in December 2013
data for the estimation of krill stock and its management. In December 2013, a trial acoustic survey ... Islands. Krill was found in most part of the survey area. The mean Sv of krill swarm tend to be higher in ... inshore waters in the north of the islands; however, no such tendency was observed in the Bransfield ... strait. The majority of the krill swarms were found in the upper 100 m with a thickness less than 30 m ...
Meeting Document : WG-EMM-14/47 : Autor(es): X. Wang, X. Zhao, G. Qi, T. Zuo, J. Zhu, J. Zhang and X. Li (People’s Republic of China)
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Fishery selection for Patagonian toothfish in CCAMLR Subarea 48.3, asymptotic or dome shaped?
Abstract: Characterisation of fishery selection is key to reducing uncertainty in the ... with age and size to arise. However this type of selection pattern is associated with the estimation of ... highly uncertain quantities of cryptic biomass. A review of the fishery and tagging data from the ... information to determine the most likely fishery selection profile. A simple metric, the distribution of tag ...
Meeting Document : WG-SAM-15/29 : Autor(es): C. Darby, V. Laptikhovsky and M. Soeffker (United Kingdom)