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Brief comments on the simulation study made by Professor Butterworth on krill fishing by an individual Japanese trawler
Paper Title: Brief comments on the simulation study made by Professor Butterworth on krill ... questions are raised concerning the simulation study of the Japanese krill fishery carried out by ... Butterworth (1988). Firstly, the simulation study used krill distribution parameter values based on the FIBEX ... results, whereas Japanese vessels often operate on layers which are much larger than the swarms detected ... begin launching their nets aiming at the swarm(s) which have just been found. When no swarm is found ... WS-KCPUE-89/7 BRIEF COMMENTS ON THE SIMULATION STUDY ... Abstract In this paper, three essential questions are raised concerning the simulation study of the ... Japanese krill fishery carried out by Butterworth (1988). Firstly, the simulation study used krill ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 347–350 : Autor(es): Ichii, T. and Y. Endo
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Results of a longline survey on seamounts in the southeast Atlantic and in Subarea 48.6 and Division 58.4.4
Paper Title: Results of a longline survey on seamounts in the southeast Atlantic and in Subarea ... October and 1 December 1997, and several seamounts were surveyed to the south of Africa: close to the ... Antarctic Polar Front (Meteor Bank) and in the CCAMLR region (Shona and Spiess seamounts, the western slope ... the isobaths and in depths down to 1 500-2 000 m. Numerically, catches were dominated by Patagonian ... , seamounts were irregular with extensive slope areas and no plateaus (note that the Bouvet Island shelf was ... were present. The t-test applied to the allometry coefficients showed that there were no significant ... RESULTS OF A LONGLINE SURVEY ON SEAMOUNTS IN THE SOUTHEAST ATLANTIC AND IN CCAMLR SUBAREA 48.6 (ATLANTIC ... several seamounts were surveyed to the south of Africa: close to the Antarctic Polar Front (Meteor Bank ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 99–116 : Autor(es): López Abellán, L.J. and J.F. González Jiménez
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Trawl bag selectivity in the Champsocephalus gunnari fishery
Paper Title: Trawl bag selectivity in the Champsocephalus gunnari fishery Abstract / Description ... were carried out in June 1990 in the South Georgia area concurrently with trawl surveys as part of the ... main biological and oceanic research program. The results presented here are based on 29 hauls and, due ... to the limited time available for experiments, should be considered as preliminary. L 50% was 24.8 cm ... of 54°25'S, 38°1O'W at depths of 230 to 250 m. The four-mile-long fishing site extended in a north ... WG-FSA-90/32 TRAWL BAG SELECTIVITY IN THE ... 1990 in the South Georgia area concurrently with trawl surveys as part of the main biological and ... oceanic research program. The results presented here are based on 29 hauls and, due to the limited time ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 295–312 : Autor(es): Bidenko, V.G. and I.G. Istomin
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Comparison of age readings from scales and otoliths of the Patagonian toothfish (Dissostichus eleginoides) from South Georgia
Paper Title: Comparison of age readings from scales and otoliths of the Patagonian toothfish ... compared for 105 specimens of the Patagonian toothfish (Dissostichus eleginoides) from the South Georgia ... test for paired data (Ts = 0.256, n = 59) conducted on the remaining 56% showed that differences in age ... estimates between the two methods were not significant. Otoliths frequently appeared totally opaque, making ... procedures. However, as no more information is available in this study, it is assumed that the rings are ... 43.81% of the samples. In the 56% of cases where readings did not agree, there was no evidence of ... , although no reference was made to their cut width. The technique of cutting otolith sections of 0.3 mm ... both structures, no significant differences were found, therefore the scale reading method did not ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 191–203 : Autor(es): Cassia, M.C
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Environment–krill relations in the South Georgia marine ecosystem
Paper Title: Environment–krill relations in the South Georgia marine ecosystem Abstract ... / Description: Interannual variability in the Southern Ocean ecosystem has long been noted and physical factors ... appear to dominate the dynamics. There are, however, few ecological time series available to assess this ... variability and it is only recently that physical datasets have been generated for the Southern Ocean. In this ... there was no information on the number of days spent fishing (days on which fishing actually occurred ... arrows indicate periods when there was no fishery due to the reported absence of krill. The first five ... negative, so it There was no consistent correlation between characterises both the absolute intensity of ... ice-edge positions through the year. There were no consistent correlations between the M-ATs at 50"s ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 13–30 : Autor(es): Fedoulov, P.P., E. Murphy and K.E. Shulgovsky
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Observations of fishing operations on a krill trawler and distributional behaviour of krill off Wilkes Land during the 1985/86 season
of krill off Wilkes Land during the 1985/86 season Abstract / Description: Japanese krill fishing ... operations were observed on board a commercial vessel and the actual operation described in detail. ‘Fish ... -finder’ was most useful in detecting swarms, while sonar was used to judge the towing direction. The size ... capture, whereas meal can be processed much later. The major products of Zuiyo Maru No. 2 were fresh ... . - 340 - Zuiyo Maru No. 2, in 1985/86, chose the ground off Wilkes Land, although she had to engage in ... another company that had already been operating there. Unfortunately there was no white krill by the ... Zuiyo Maru No. 2 in 1985/86 season was within the area of good harvesting in the past. During ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 335-368 : Autor(es): Ichii, T.
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Analysis of changes in biomass of fish stocks in the South Georgia area in 1976/77-1986/87
Paper Title: Analysis of changes in biomass of fish stocks in the South Georgia area in 1976/77 ... -1986/87 Abstract / Description: The swept area method was used to estimate biomass density changes in ... the stocks of five fish species (Champsocephalus gunnari, Chaenocephalus aceratus, Pseudochaenichthys ... georgianus, Notothenia gibberifrons and Notothenia rossii marmorata) in the South Georgia area in the seasons ... biomass density of c. aceratus increased distinctly, no fish below 30 cm in length were found in the ... -40 cm was still quite high in the catch (no data from the 1979/80 season). Biomass densities in ... CHANGES IN BIOMASS OF FISH STOCKS IN THE SOUTH GEORGIA AREA IN 1976/77-1986/87 M. Mucha and W ... . Slosarczyk (Poland) Abstract The swept area method was used to estimate biomass density changes in the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 185-211 : Autor(es): Mucha, M. and W. Ślósarczyk
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Patterns and processes in the distribution and dynamics of Antarctic krill
Paper Title: Patterns and processes in the distribution and dynamics of Antarctic krill Abstract ... / Description: A general framework is presented to develop, test and integrate component models of the ... abundance. Incremental models should then be compared to statistical descriptions of the observed ... distribution patterns at various scales of observation to ascertain the plausibility of the model and identify ... SC-CAMLR-VII/BG/20 PATTERNS AND PROCESSES IN THE ... framework is presented to develop, test and integrate component models of the distribution and dynamics of ... should then be compared to statistical descriptions of the observed distribution patterns at various ... scales of observation to ascertain the plausibility of the model and identify critical processes to be ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 281–299 : Autor(es): Levin, S.A., A. Morin and T.M. Powell
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A simple approach for calculating the potential yield of krill from biomass survey results
Paper Title: A simple approach for calculating the potential yield of krill from biomass survey ... results Abstract / Description: Estimates are calculated for the parameter λ in the yield equation Y = λ ... MB 0 for a krill fishery in which both the fishery and krill growth are seasonal. The criterion used ... for the calculations is that the probability that the krill spawning biomass drops below 20% of its ... the following 20 years, is that from a single pre-exploitation biomass survey. No account is taken of ... concentrated in the three-month growth/fishing season (effectively equivalent to a no-seasonality situation ... acoustic workshop. BIOMASS Report Series No. 40. pp. 106. BEDDINGTON, J.R. and J.G. COOKE. 1983. The ... catch in number of laill over a season from a single cohort of size No at the start of the "year" will ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 207–217 : Autor(es): Butterworth, D.S., A.E. Punt and M. Basson
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Preliminary results of research activities of RV Evrika in the Scotia Sea in January-March 1988
Paper Title: Preliminary results of research activities of RV Evrika in the Scotia Sea in January ... -March 1988 Abstract / Description: In 1987/88 a multi-disciplinary survey was conducted of the Scotia ... Sea and adjacent waters, accompanied by regular trawlings with an Isaac-Kidd trawl. The waters off ... South Georgia in particular were surveyed twice. Research activities are part of the program implemented ... was rather smoothed, hence there were no required conditions for the formation of abundant krill ... ACTIVITIES OF RV EVRIKA IN THE SCOTIA SEA IN JANUARY-MARCH 1988 L.1. Maklygin , A.S. Fedorov, V.N. Shnar ... -disciplinary survey was conducted of the Scotia Sea and adjacent waters, accompanied by regular trawlings with ... an Isaac-Kidd trawl. The waters off South Georgia in particular were surveyed twice. Research ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 215-229 : Autor(es): Maklygin, L.I., A.S. Fedorov, V.N. Shnar, Yu.A. Shulyakovsky, I.V. Krasovsky, Yu.D. Shuvaev and A.V. Kromsky