Results 201 to 209 of about 1,092 (209)
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Application of a fuzzy controller to depth control of a midwater trawl net
Fisheries Science, 2000SUMMARY: A control system is presented that uses a fuzzy algorithm in controlling the depth of a midwater trawl net, and field experiments carried out on the training ship Kaya of Pukyong National University. The fuzzy controller calculates the length of the warp to be changed, based on the depth error between the desired depth and actual depth of ...
Chun-Woo Lee, Ju-Hee Lee, In-Jin Kim
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A new midwater trawl for sampling discrete depth horizons
Journal of the Marine Biological Association of the United Kingdom, 1969A new midwater trawl based on that designed by Tucker (1951) is described with details of opening and closing equipment, acoustic release gear and depth telemetering pinger. An account is given of the method used in operating the xtrawl from R.R.S. ‘Discovery’.
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Comparative captures of pelagic cephalopods by midwater trawls
, 1977 The captures of pelagic cephalo pods by the 3 m Isaacs-Kidd midwater trawl (IKMT), the 8m2 reetangular midwater trawl (RMT 8), and the small (1400 mesh) Engeltrawl (E.MT) are compared.
Roper, C. F. E.
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A method for easing the launch and recovery of mouth-closing midwater trawls
Deep Sea Research, 1977Abstract A method is described to simplify the handling of mouth-closing midwater trawls during launch and recovery operations at sea. The vertical cables of the net mouth are drawn upward to stack the mouth and frame bars into a smaller package.
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Stepped-Oblique Midwater Trawling as an Assessment Technique for Rainbow Smelt
North American Journal of Fisheries Management, 1991Abstract Discrete-depth midwater trawling for rainbow smelt Osmerus mordax at night in Lake Champlain revealed a delayed vertical migration of smaller fish and size partitioning vertically within the water column. These behavioral observations led to the development and evaluation of a nighttime stepped-oblique midwater trawling technique.
Richard A. Kirn, George W. Labar
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Economics of gill netting and two boat midwater trawling
1988The paper deals with the economic aspects of operation of gill netting and two boat midwater trawling conducted off Cochin. The data collected on two boat midwater trawling and gill netting during 1979 and 1980-81 are presented. Gill netting was profitable at the range of 17.5 and 25.2% while two midwater trawling was profitable at the rate of 18.5 %.
Sadanandan, K.A. +3 more
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Application of net gauge to midwater trawling
Deep Sea Research and Oceanographic Abstracts, 1963openaire +1 more source
Hydrodynamic characteristics of frustum-type depressor for sampling midwater trawl
Ocean EngineeringZhiqiang Liu +6 more
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