Resultados de la búsqueda
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Conditions for the precise measurement of fish target strength in situ
reverberation volume which contributes echo formation at a certain instant and the other is the percentage of ... the multiple echoes which is derived from a residual of the single echo extraction. With the decrease ... of both indexes measured target strength approach a certain asymptotic value which is admitted as ...
Meeting Document : WG-Krill-94/35 : Autor(es): K. Sawada and M. Furusawa (Japan), N.J. Williamson (USA)
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Report on incidental bird mortality and effectiveness of mitigation measures during demersal long lining by Ihn Sung 66 in Subarea 48.3 - December 1993 to February 1994
Abstract: A method of surveying incidental mortality of seabirds during longlining operations and ... daylight during which the longline is set is more important than the use of a streamer line in the ... mitigation of incidental mortality. The use of a streamer line during setting of longlines during the day ...
Meeting Document : WG-IMALF-94/14 : Autor(es): C. Jones and G. Parkes (United Kingdom)
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Preliminary model of krill fishery behaviour in Subarea 48.1
Abstract: A simple deterministic model is described which models the behaviour of the krill ... March, compare favourably with the general distribution of catches in Subarea 48.1. A number of ... management scenarios are considered, which involve closures (i) of a zone 50 km offshore from the South ...
Meeting Document : WG-KRILL-93/14 : Autor(es): D.J. Agnew (Secretariat)
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Change-in-ratio and index-removal methods for population assessment and their application to snow crab (Chionoecetes opilio)
Abstract: Change-in-ratio and index-removal estimators are presented in a general form suitable ... for fisheries studies. We also show how to combine the two approaches in a single estimator. It is ... of pre-recruits but this requires the assumption of equal catch ability of all animals, a condition ...
Meeting Document : WS-CRAB-93/10 : Autor(es): X. Xu, E.G. Dawe and J.M. Hoenig (USA)
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Status of krill target strength
. These are confined to measurements on aggregations of live euphausiids, which should avoid a frequent ... orientational parameters, for which there is an empirical basis. The theoretical estimates show a non-monotonic ... are applicable to a wide range of lengths, acoustic frequencies, and orientation parameters. Author(s ...
Meeting Document : WG-KRILL-92/11 : Autor(es): K.G. Foote (Norway), D. Chu and T.K. Stanton (USA)
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Feeding of nine Antarctic fish species and their daily ration evaluations
species were investigated and their daily diets were assessed from data obtained at a day-long station ... mainly of Euphausiids; T. centronotus is a benthophage feeding mainly on Gammarids and Polychaetas, T ... 5 times their body weight. Author(s): Ye. A. Pakhomov and V. B. Tseitlin (USSR) Title: Feeding of ...
Meeting Document : WG-FSA-91/08 : Autor(es): Ye. A. Pakhomov and V. B. Tseitlin (USSR)
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Food consumption by predators in CCAMLR Integrated Study Regions
Abstract: A detailed description of the structure and mode of operation of a model for estimating ... food consumption of seabird predators is provided. This model is a development of earlier ones used in ...
Meeting Document : SC-CAMLR-IX/BG/16 : Autor(es): Delegation of United Kingdom
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Dates of spawning of Antarctic euphausiids
waters of different origin and on different latitudes euphausiids begin to spawn in a usual succession ... -latitude origin is earlier then in the waters of an other type. The correlation with a geographical ... position of a region (latitude) is obvios for the beginning and maximum of the spawning while for the ...
Meeting Document : SC-CAMLR-VIII/BG/24 : Autor(es): Delegation of USSR
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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)
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 ... indexing the extent of the krill distribution through routine oceanographic monitoring merits attention. A ...
Meeting Document : WS-KCPUE-89/03 : Autor(es): D.S. Butterworth (South Africa)
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Accumulation of stranded plastic objects and other artefacts at Inaccessible Island, central South Atlantic Ocean
Abstract: During 1987 a survey of macro-artefacts (>10 mm diameter) was conducted along a 900 ... sources had increased by at least 120 per cent, suggesting a recent increase in the density. of artefacts ...
Meeting Document : CCAMLR-VII/BG/04 : Autor(es): P.G. Ryan and B.P. Watkins (South Africa)