Search results
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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 : Author(s): Richardson, K., Manion, G., Ferrier, S., Elith, J.
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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 : Author(s): D.S. Butterworth (South Africa)
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By-catch of rays in the 2002/03 toothfish fishery around South Georgia
Abstract: The 2002/2003 fishing season was the first in which three new policies for rays were ... tried: • It was the first in which vessels were asked to cut off all rays at water level to assist ... survival and conservation of rays; • It was the first in which very good quality information was available ... from all observers’ tally periods on the catch rates of rays cut off the line; • In 2003 the UK, with ...
Meeting Document : WG-FSA-03/58 : Author(s): D.J. Agnew, J. Pearce and M. Endicott (United Kingdom)
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Fishing intensity of Russian fleet krill fishery in Subarea 48.2 and 48.3
Abstract: The purpose of this paper was estimating commercial fleet impact on krill population in ... -by-haul data using a model of probabilistic-statistical theory of fishery systems developed in the ... aggregated in the fishing grounds was assessed basing on 22800 haul data. The analysis of Soviet fleet ... competitive with dependent predators for the krill resource. In this case, a certain spatial overlap of the ...
Meeting Document : WG-EMM-02/62 : Author(s): S.M. Kasatkina and V.F. Ivanova (Russia)
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Crab by-catch in the experimental toothfish pot fishery around South Georgia, 2000
occurred in shallow water, generally shallower than 800m. P. anamerae, which has not been reported for this ... area previously, had an intermediate depth distribution from 400 – 800m. P. formosa was present in ... . There were some differences in catch rate5 between areas, with lowest catch rates being encountered ... between Shag Rocks and South Georgia, and highest for P. formosa in deep water north of South Georgia. Few ...
Meeting Document : WG-FSA-00/24 : Author(s): T. Daw, D. Agnew, M. Purves, G. Pilling and C. Yau (United Kingdom)
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Estimation of catch rate and mean weight in the exploratory Dissostichus fisheries across Divisions 58.4.1 and 58.4.2 using generalised additive models
Abstract: The exploratory longline fisheries in Divisions 58.4.1 and 58.4.2 (primarily targeting ... make predictions of catch rate and mean weight across fishable depths in both Divisions. Catch rates ... across the region are low compared to those in other Dissostichus fisheries within the Convention Area ... potential and population structure in other exploratory fisheries is recommended. Author(s): D.C. Welsford ...
Meeting Document : WG-FSA-11/35 : Author(s): D.C. Welsford (Australia)
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An initial analysis of data provided from the deployment of scientific observers in the krill fishery
approach analysis on the other hand revealed the distribution of variance in krill length at different ... scales and indicated that krill hauled in a given month/season/area were similar enough to be pooled to ... variability in krill length due to seasons, months and areas and this allowed estimates of variance ... for future sampling scheme, including the potential for an adaptive responding to the variability in ...
Meeting Document : WG-EMM-12/60 : Author(s): S. Thanassekos (CCAMLR Secretariat), S. Candy (Australia), E. Appleyard (CCAMLR Secretariat), S. Kawaguchi (Australia) and K. Reid (CCAMLR Secretariat)
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Characteristics of water flows in areas for Antarctic krill concentrations near the South Shetland Islands
Abstract: Water flows in harvestable areas for Antarctic krill (Euphausia superba) on the ... . Convergent complex eddies were observed in harvestable areas on the shelf, while shear current was observed ... in those on the slope. Large-scale movements of the buoys suggest krill flux from the South Shetlands ... water flows in areas for Antarctic krill concentrations near the South Shetland Islands Approval ...
Meeting Document : WG-EMM-95/49 : Author(s): Naganobu, M., Ichii, T.
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A review on the feeding conditions of the baleen whales in the Southern Ocean
and unpublished data since 1946. Past geographical distributions of the krill in the whales stomach ... frequently in the whaling Areas II and III, then the size comes medium (40-50mm) in the Areas IV and V, and ... baleen whales in the Southern Ocean Approval: Approved ...
Meeting Document : WG-KRILL-93/16 : Author(s): A. Kawamura (Japan)
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Are tagging targets set in appropriate terms?
Abstract: Currently the target tagging rate to be achieved by vessels fishing in the CCAMLR area ... is set in terms of the number of fish tagged per mass of fish caught thereby mixing “units” of ... that defining the target in terms of a percentage of the number caught may be more appropriate. Author ... (s): R.W. Leslie and C. Heinecken (South Africa) Title: Are tagging targets set in appropriate ...
Meeting Document : WG-SAM-12/25 : Author(s): R.W. Leslie and C. Heinecken (South Africa)