Search results
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Reports on abundance and biological information on toothfish in Divisions 58.4.4a and 58.4.4b by Shinsei Maru No. 3 in 2011/12 season
during the survey in two SSRUs (B & C) of Ob Lena Bank. Total catch (excluding tagged and released ... fish) of Dissostichus eleginoides was 28.3 tonnes in the survey area in 70 longline sets, contributing ... 91.3 % to the total fish catch (31 tonnes). Mean CPUEs of D. eleginoides was in the SSRUs were 6.7 ... indiv. / km (CV = 70.0%) in terms of number and 48.3 kg / km (CV = 79.1%) in terms of weight. The mean ...
Meeting Document : WG-SAM-12/16 : Author(s): K. Taki, T. Iwami, M. Kiyota and T. Ichii (Japan)
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Krill distribution and biomass variability within Subarea 48.3 in June 1991
Abstract: Temporal and spatial variability of krill distribution characteristics was investigated ... aggregations occurred a s fields of small swarms whose spatial distribution characteristics (size and density ... of swarms, swarm field density, number of swarms per mile) varied considerably from tach to tack ... within each survey. The maximum horizontal extension of swarms was 120 m, although about 70% of swarms ...
Meeting Document : WG-KRILL-93/35 : Author(s): S.M. Kasatkina, E.N. Tymokhin, P.P. Fedulov and K.E. Shulgovskiy (Russia)
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KRILL FISHERY BEHAVIOUR IN THE SOUTHWEST ATLANTIC
Abstract: 10 years worth of recent finescale haul-by haul krill data were used to characterize ... behaviour of krill fishery. Analysis of travel distance in relation to catch level revealed a pattern that ... . However, this pattern only holds for operations by Japan. Preferred level of catch by Japan derived ... ). Other nations do not have a preference for an upper limit of catch. Locations of operations were very ...
Meeting Document : WG-EMM-08/39 : Author(s): S. Kawaguchi (Australia)
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A generalized discriminant for sexing fulmarine petrels from external measurements
birds to predict the sex of unknown individuals in field studies. Geographic variation in size and shape ... often limits the predictive value of a discriminant function to the population from which it was derived ... . Specific discriminant functions for populations of five species of fulmarine petrels (Northern Fulmar ... , Daption capense; and Snow Petrel, Pagodroma nivea) assigned 81 to 98% of birds in the samples to the ...
Meeting Document : WG-CEMP-94/24 : Author(s): J.A. van Franeker and C.J.F. ter Braak (The Netherlands)
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Beach debris survey – Main Bay, Bird Island, South Georgia, 2005/06
Abstract: During the sixteenth year of standardised beach surveys of man-made debris at Bird ... Island, South Georgia, a total of 544 items were collected, the highest number of debris collected since ... 101% more during summer, a mass increase of 1.19kg overall (29%). For the third consecutive year ... , nylon line was absent from Bird Island, an encouraging result after the peak of 546 pieces in 1995/96 ...
Meeting Document : SC-CAMLR-XXVI/BG/16 : Author(s): Delegation of the United Kingdom
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Beach debris survey - Main Bay, Bird Island, South Georgia 1994/95
Abstract: The fifth year of survey of beach debris at Main Bay, Bird Island reported a 3-fold ... ). Debris accumulated throughout the summer accounted for 33% of the total (three times the summer ... proportion in 1993/94). Of the 67% of debris occurring during the winter, 43 % occurred during July. Nylon ... line, comprising 80% of debris, was mainly identical to material used in the long-line fishery, as ...
Meeting Document : CCAMLR-XV/BG/04 : Author(s): Delegation of the United Kingdom
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Hook loss in CCAMLR exploratory fisheries
Abstract: The development of methods to estimate unaccounted fishing mortality from lost fishing ... lines requires an estimate of the number of lost hooks that are attached to sections of line. In 2011 ... hook loss data was provided by 21 of the 34 vessel/fishery reports with an estimated 317920 hooks lost ... attached to sections of lines. In 2012 15 of the 26 vessel/fishery reports provided non-zero data with an ...
Meeting Document : WG-FSA-12/65 : Author(s): Secretariat
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Warp strike observations
Abstract: This report contains an analysis of data on seabird trawl-warp strike collected by ... summer of 2004 – 2005. The aim of the work was to test a new protocol for quantifying warp-strikes and to ... probability of warp strikes occurring for small and large birds. The protocol was designed for use by non ... -specialist observers, to provide a robust and objective assessment of warp strike occurrence. The key results ...
Meeting Document : WG-FSA-05/40 : Author(s): E. Abraham (New Zealand)
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Physical forcing in the southwest Atlantic: ecosystem control
Abstract: In the southwest Atlantic sector of the Southern Ocean, temporal variability in the ... physical environment has been recorded since the early part of the last century. For example, ocean ... temperatures are known to vary both between seasons and between years. Time series analysis of sea surface ... temperature at South Georgia shows the presence of high levels of autocorrelation, with periodicity evident in ...
Meeting Document : WG-EMM-04/34 : Author(s): P.N. Trathan, E.J. Murphy, J. Forcada, J.P. Croxall, K. Reid and S.E. Thorpe (United Kingdom)
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Spatial variability and power to detect regional-scale trends
Abstract: An important issue in regional-scale trend detection is the degree of concordance in ... between sites than within sites over time, inter-site variance can overwhelm the effects of other sources ... of variation in a system, resulting in low power in trend detection across that scale, despite ... precise methods of measurement and long time series of data. We used published data from repeated regional ...
Meeting Document : WG-EMM-03/47 : Author(s): C. Southwell and L. Emmerson (Australia)