Results 191 to 200 of about 1,092 (209)

A Simple Surface-Midwater Trawl

Progressive Fish-Culturist, 1968
Charles R. Gasaway, Victor W. Lambou
exaly   +2 more sources

Studies on bridle lengths in one-boat midwater trawling [PDF]

, 1982
Investigation on the comparative fishing trials to study the effect of bridles for a 10.5 m four equal panelled one-boat midwater trawl are described. Three bridle lengths of 20, 30 and 40 m were tested for relative efficiency evaluation. 30m bridles are found to be more suitable for the particular design and arbitrary selection of bridle lengths would
Mhalathkar, H.N., Ramarao, S.V.S., Mathai, P.G.   +2 more
core   +4 more sources

Diving Plane for a Tucker Midwater Trawl

Progressive Fish-Culturist, 1983
exaly   +2 more sources

A new electronic system for the rectangular midwater trawl (RMT)

Marine Biology, 1990
This paper describes a modified modern version of the original rectangular midwater trawl (RMT) manufactured by the Institute of Oceanographic Sciences (IOS). The shipboard acoustic transducer and the underwater RMT-monitor were replaced by an electronic interface box was while the data transfer, realized by a single-conductor cable.
W. Dimmler, H. Klindt
openaire   +3 more sources

Avoidance and escape behaviour by herring encountering midwater trawls

Fisheries Research, 1997
The main objective of this study was to assess how and to what extent Baltic herring avoid and escape midwater trawls under commercial fishing conditions. Information was obtained by acoustic, visual and direct sampling techniques. The majority of herring schools in the path of an approaching trawl were observed to enter the trawl.
Suuronen, Petri, Lehtonen, Esa, Wallace, John   +2 more
openaire   +1 more source

Modeling of a midwater trawl system with respect to the vertical movements

Fisheries Science, 2000
SUMMARY: A mathematical model of the midwater trawl system is presented to aid in understanding the dynamic behavior. The equations of motions for the trawl system have been obtained using Lagrange's equation with respect to variables of the displacement of the trawler, the length of the warp connecting the trawler and otter board, the angle of the ...
Chun-Woo Lee, Ju-Hee Lee
openaire   +1 more source

Quantification of water flow and net drag in midwater trawls

Fisheries Research, 1993
Abstract The flow velocity and hydrodynamic drag of 18 quarter-scale midwater box trawl nets were quantified in a circulating water channel using electromagnetic current meters and strain gauges, with the mouth of each net attached to a rigid pipe frame to maintain geometric similarity.
Buxton, N. G., DeAlteris, J. T.
openaire   +2 more sources

The Influence of an Electric Light on the Capture of Oceanic Cephalopods by a Midwater Trawl

Journal of the Marine Biological Association of the United Kingdom, 1998
A total of 57 comparative hauls using a rectangular midwater trawl with a fishing mouth area of 50 m2 (RMT 50) were carried out along the sides of an imaginary triangle south of Madeira in 1986. A total of 1258 cephalopods were caught, giving a mean of 22 per haul with a range from 0 to 67.
Malcolm R. Clarke, P.L. Pascoe
  +6 more sources

Behaviour of Herring Schools in Response to a Midwater Trawl

Journal of the Fisheries Research Board of Canada, 1968
not available
openaire   +1 more source

Development of a low-energy midwater trawl with different combinations of trawl nets and trawl doors through model experiments

Fisheries Science, 2018
Greenhouse gas (GHG) emissions from fisheries are of primary concern because of their effects on the environment. GHG emissions from fisheries are mainly related to their fuel consumption. Furthermore, the fuel consumption of fisheries also influences their economics. Therefore, many studies have been conducted to find ways of reducing fuel consumption
Jihoon Lee, Chun-Woo Lee, Songho Park, Jieun Kim, Subong Park, Taeho Kim   +5 more
openaire   +1 more source