Search results
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A simulation study of krill fishing by an individual JAPANESE trawler
the proportional biomass decrease. Catch statistics collected at present (centred primarily an catch per fishing ... time) are of low utility in detecting biomass decline. Combination catch rate indices incorporating ... . Generally the indices respond by dropping relatively less than the proportional biomass decrease. Catch ... statistics collected at present (centred primarily an catch per fishing time) are of low utility in detecting ...
Meeting Document : SC-CAMLR-VII/BG/37 : Author(s): D.S. Butterworth (Invited Expert)
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Influence of tag numbers, size of tagged fish, duration of the tagging program, and auxiliary data on bias and precision of an integrated stock assessment
recaptures and maximise the likelihood of a robust assessment. (2) Using catch-at-age data instead of catch ... and maximise the likelihood of a robust assessment. (2) Using catch-at-age data instead of catch-at-length data ... and maximise the likelihood of a robust assessment. (2) Using catch-at-age data instead of catch-at-length data ...
Meeting Document : WG-SAM-12/24 : Author(s): P.E. Ziegler (Australia)
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Analysis of longline fleet operation on the Patagonian toothfish (Dissostichus eleginoides) in the subarea of the South Georgia Island (48.3) in 1989–2003
Abstract: The main characteristics of Patagonian toothfish (Dissostichus eleginoides) catch ... in catches both for 1000 hooks and vessel/day. The given objective long-term data evidenced a substantial ... decrease in catch per unit value and necessity of the more attentive approach to the assessment ... The main characteristics of Patagonian toothfish (Dissostichus eleginoides) catch dynamics off ...
Meeting Document : WG-FSA-03/98 : Author(s): N.V. Kokorin and A.F. Petrov (Russia)
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A note on relating krill CPUE measures to abundance trends
). The relationship of combinations of these parameters to various possible measures of catch-per-unit-effort (CPUE ... ) for the Antarctic krill fishery is considered. The combined index of catch-per-hour of trawling divided by average ... of combinations of these parameters to various possible measures of catch-per-unit-effort (CPUE) for the Antarctic ... krill fishery is considered. The combined index of catch-per-hour of trawling divided by average inter ...
Meeting Document : WS-KCPUE-85/03 : Author(s): D.G.M. Miller and D.S. Butterworth (South Africa)
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Testing for genetic differentiation between two size classes of the starry skate (Amblyraja georgiana)
Abstract: Two size classes of A. georgiana have been described in by-catch fishing data reported ... in the catch data from the Ross Sea fisheries. We extracted DNA from A. georgiana samples from both size ... Two size classes of A. georgiana have been described in by-catch fishing data reported in the catch ...
Meeting Document : WG-FSA-12/53 : Author(s): P. Ritchie and A. Fleming (New Zealand)
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Assessment of toothfish in Subarea 48.3, 2006
48.3. We provide sensitivity runs that include revised maturity and catch weighted proportion at length ... data. We additionally provide a sensitivity run which examines uncertainty in IUU catches from 1995 ... trends and construct a model that uses age-based observations, specifically estimates of catches at age ... derived from otolith examination of a random sample of the catch. 3. All the assessments suggest ...
Meeting Document : WG-FSA-06/53 : Author(s): D.J. Agnew, R. Hillary, M. Belchier, J. Clark and J. Pearce (United Kingdom)
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A shore-based randomised sampling design used in the artisanal longline fishery for Dissostichus eleginoides off central Chile
on catch date, location, and depth cannot be independently verified, nor data taken on by-catch ... and cut time wasted during poor fishing or travel to fishing grounds. However, data on catch date ... , location, and depth cannot be independently verified, nor data taken on by-catch or incidental mortality ...
Meeting Document : WG-FSA-96/54 : Author(s): Rubilar, P., Ashford, J., Jones, C.
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The Australian exploratory toothfish fishery in CCAMLR Division 58.4.2 in season 2002/03
involving 140 sets between 5 February and 25 March 2003 are summarised. Total catch from the three SSRUs ... in catch composition and D. mawsoni length frequency. Author(s): Delegation of Australia Title ... 5 February and 25 March 2003 are summarised. Total catch from the three SSRUs fished was 111.8 tonnes ... for males and 1300mm for females. There were marked differences between the SSRUs in catch composition ...
Meeting Document : WG-FSA-03/68 : Author(s): Delegation of Australia
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Fishing patterns of Japanese krill trawlers
with the plots of aggregated catch, suggesting these two kinds of CPUEs may not be good indices for expressing ... the status of krill in the fishing ground. Catch per fishing days maybe the reasonable index for expressing ... of aggregated catch, suggesting these two kinds of CPUEs may not be good indices for expressing the status ... of krill in the fishing ground. Catch per fishing days maybe the reasonable index for expressing the status ...
Meeting Document : WG-EMM-02/28 Rev. 1 : Author(s): S. Kawaguchi, T. Kameda and Y. Takeuchi (Japan)
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Results of the fourth CCAMLR sponsored research survey to monitor abundance of sub-adult Antarctic toothfish in the southern Ross Sea, February 2015 and further development of the time series
was successful in completing all of the planned stations. Standardised catch rates of sub-adult (<110 cm ... and to age 10 for females in 2015. The decline in the catch rates during the survey is consistent ... catch rates of slightly larger sub-adult and adult fish, and warrant future monitoring. We recommend ... was successful in completing all of the planned stations. Standardised catch rates of sub-adult (<110 cm ...
Meeting Document : WG-SAM-15/44 : Author(s): S.M. Hanchet, B.R. Sharp, S. Mormede, S.J. Parker (New Zealand) and M. Vacchi (Italy)