Resultados de la búsqueda
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Entanglement of Antarctic fur seals Arctocephalus gazella in man made debris at Signy Island, South Orkney Islands, 1998/99
parallel study undertaken at Bird Island, South Georgia in 1998/99. These indicated that the number of ... of fur seals was entangled in packaging bands at Signy Island (67%) than at Bird Island (38 ... %). Entanglements in packaging bands at Signy Island were 47% higher than the previous season. There were no reports ... of entanglements in fishing net. 'Severe' and 'very severe ' injury was being ...
Meeting Document : SC-CAMLR-XVIII/BG/06 : Autor(es): Delegation of the United Kingdom
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REPORT ON THE ABANDONED GILLNET RETRIEVAL OPERATION CONDUCTED BY AUSTRALIA IN CCAMLR STATISTICAL DIVISION 58.4.3B (BANZARE BANK)
gillnets as a fishing method to target toothfish in the Convention area. Estimating the impact of IUU ... . Based on the amount of toothfish found in the 8 km long section of net retrieved, upwards of 29 tonnes ... gillnets. However these figures are likely to be underestimates of total mortality in gillnets, due to the ... evidence of large numbers of sea-lice depredated fish in the net. Author(s): Snowdon, D., Hamill, J ...
Meeting Document : TASO-09/10 : Autor(es): Snowdon, D., Hamill, J., McEachan, F., Welsford, D.
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LENGTH-BASED ASSESSMENT FOR THE MACKEREL ICEFISH (CHAMPSOCEPHALUS GUNNARI) IN SUB-AREA 48.3
Abstract: The current assessment method for the mackerel icefish (Champsocephalus gunnari) in sub ... identification of cohorts from the survey model, given the differential age structures observed in the population ... at Shag rocks and around South Georgia. In this paper we propose a length-based approach that removes ... distribution of the population from the survey data which, in conjunction with the bootstrapped survey biomass ...
Meeting Document : WG-SAM-09/15 : Autor(es): R.M. Hillary, D.J. Agnew and R. Mitchell (United Kingdom)
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USING GENERALIZED DISSIMILARITY MODELLING TO ANALYSE AND PREDICT PATTERNS OF BETA DIVERSITY IN REGIONAL BIODIVERSITY ASSESSMENT
predicting spatial patterns of turnover in community composition (beta diversity) across large regions. The ... nonlinearity commonly encountered in large-scaled ecological data sets: (1) the curvilinear relationship ... ) the variation in the rate of compositional turnover at different positions along environmental ... assessment activities including visualization of spatial patterns in community composition, constrained ...
Meeting Document : WS-VME-09/P03 : Autor(es): Richardson, K., Manion, G., Ferrier, S., Elith, J.
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A methodological proposal to monitor changes in coastal fish populations by the analysis of pellets of the blue-eyed shag Phalacrocorax atriceps
Abstract: A proposal to monitor changes in coastal fish populations is presented in this document ... . The methodology considered is based in the analysis of regurgitated pellets of the blue-eyed shag ... changes in coastal fish populations by the analysis of pellets of the blue-eyed shag Phalacrocorax ...
Meeting Document : WG-EMM-95/84 : Autor(es): Barrera-Oro, E., Casaux, R.
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Conditions for the precise measurement of fish target strength in situ
Abstract: Conditions for precise measurement of in situ fish target strength (TS) are empirically ... studied and two indexes are introduced for this purpose. One is the number of fish in the effective ... obtained from one large same fish school in the eastern shelf of Bering sea during the intership ... calibration between Japanese and U.S. vessels on 15 and 16 August 1991. Published in J.Mar.Acoust.Soc. Author ...
Meeting Document : WG-Krill-94/35 : Autor(es): K. Sawada and M. Furusawa (Japan), N.J. Williamson (USA)
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Rockhopper penguins and other marine life threatened by driftnet fisheries in the south Atlantic ocean
-target species in the Pacific Ocean, has extended its range to include the South Atlantic Ocean ... . Relatively little is known about the areas of operation and impacts of driftnetting in the South Atlantic as ... . This paper reviews the impact of the driftnet fishery on non-target species in the central South ... , apparently resulting in considerable mortality of rockhopper penguins (Eudyptes chrysocome) and other marine ...
Meeting Document : CCAMLR-IX/BG/05 : Autor(es): Delegation of South Africa
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Some aspects of the relation between Antarctic krill abundance and CPUE measures in the Japanese krill fishery. (Component of SC-CAMLR-VI/BG/4)
quality considerations- in particular the increasing tendency to avoid catching "green” krill. These ... factors result in Catch-per-Day and Catch-per-Haul measures being unlikely to index krill abundance ... time data may be needed to assess the density of swarms in a concentration, but may be difficult to ... record in practice, and a number of other factors may complicate any analysis. The possibility of ...
Meeting Document : WS-KCPUE-89/03 : Autor(es): D.S. Butterworth (South Africa)
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Distribution, abundance and acoustic properties of Antarctic silverfish (Pleuragramma antarcticum) in the Ross Sea
community of top predators in the shelf waters of the Ross Sea. In spite of their abundance and important ... role in Antarctic food chains, very little is known of many ecological and biological aspects of this ... . Tangaroa in February–March 2008. Multi-frequency acoustic data (12, 38, 70 and 120 kHz) allowed ... times present close to the bottom, where they were frequently caught in demersal trawls shallower than ...
Meeting Document : WG-FSA-10/P04 : Autor(es): R.L. O’Driscoll, G.J. Macaulay, S. Gauthier, M. Pinkerton and S. Hanchet
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Recommendations from a cross-sector workshop on krill fishing and conservation in the Scotia Sea and Antarctic Peninsula region
Abstract: In June 2014, the ICED programme, the British Antarctic Survey and WWF co-hosted a two ... day workshop entitled “Understanding the objectives for krill fishing and conservation in the Scotia ... progress in the management of the krill fishery; broadening participation in WG-EMM to include other ... from a cross-sector workshop on krill fishing and conservation in the Scotia Sea and Antarctic ...
Meeting Document : WG-EMM-14/12 : Autor(es): S. Hill, R. Cavanagh, R. Downie, C. Knowland and S. Grant (United Kingdom)