WS-KCPUE-89/01
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Agenda for the Krill CPUE Workshop
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WS-KCPUE-89/02
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Annotated agenda
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WS-KCPUE-89/03
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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)
D.S. Butterworth (South Africa)
Abstract:
The history of the Japanese krill fishery is reviewed briefly. Important aspects of the fishing operation are the constraints imposed by processing rate limitations on the vessels, and product 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. Read More
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WS-KCPUE-89/04
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A simulation study of krill fishing by an individual Japanese trawler (SC-CAMLR-VI/BG/37)
D.S. Butterworth (South Africa)
Abstract:
A model is set up for the operation (which includes both searching and fishing) of a Japanese krill trawler over a half-month period. It is based on an underlying krill distribution model whose parameters are determined primarily from the scientific FIBEX surveys. Output from the model of the operation is compared with (and partially tuned to) statistics for a sample of data from the Read More
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WS-KCPUE-89/05
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Analysis and modelling of the Soviet Southern Ocean krill fleet (SC-CAMLR-VII/BG/12)
M. Mangel (South Africa)
Abstract:
Published in: Selected Scientific Papers, Volume 1, pp. 127-252
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WS-KCPUE-89/06
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Analysis and modelling of the Soviet Southern Ocean krill fleet, II: Estimating the number of concentrations and analytical justification for search data
M. Mangel (South Africa)
Abstract:
In this paper, I show how data that are routinely collected by survey vessels can be used to estimate the number of Concentrations of krill (in the sense of Butterworth (1988), Mangel (1988)) in a given region of the southern ocean. Sample computations are performed, using data collected by Soviet research/survey vessels in the early 1980s. These examples highlight the need for a navigational Read More
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WS-KCPUE-89/07
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Brief comments on the simulation study made by Prof. Butterworth on krill fishing by an individual Japanese trawler
T. Ichii and Y. Endo (Japan)
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WS-KCPUE-89/08
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CPUEs, body length and greenness of Antarctic krill during 1987/88 season in the fishing ground north of Livingston Island
T. Ichii and Y. Endo (Japan)
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WS-KCPUE-89/09
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Some examples of time budget data recorded by a Japanese trawler Ehiko Maru in 1986/87 season
T. Ichii and Y. Shimadzu (Japan)
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WS-KCPUE-89/10
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Size and density of krill layers fished by a Japanese trawler in the waters north of Livingston Island in January 1988
T. Ichii and Y. Shimadzu (Japan)
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WS-KCPUE-89/11
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Krill aggregation characteristics: spatial distribution patterns from hydroacoustic observations. Polar Biology (in press)
D.G.M. Miller and I. Hampton (South Africa)
Abstract:
The distributional features and physical characteristics of some 1500 krill (Euphausia superba Dana) aggregations detected and sized acoustically in the south-west Indian Ocean are described. The aggregations were on average considerably smaller than elsewhere in the Antarctic. Aggregation biomass was log-normally distributed with a mean of 0.18 t. Only 3% of the aggregations were heavier than Read More
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WS-KCPUE-89/12
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Some examples of time budget data recorded by a Japanese trawler, Ehiko Maru in 1986/87 season
Far Seas Fisheries Laboratory (Japan)
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