Preliminary measurements of otter board tilt and 3-D flow velocity during bottomtrawl operations were ... Future studies should focus on reducing tilt variation, wake turbulence, and bottom contact to stabilize
Fishing experiment was carried out by bottomtrawl, with the codend of 110mm mesh size. ... This study was conducted in order to the experiment of bottomtrawl fisheries in the sea mount of central ... northern pacific(30˚-40˚N, 170˚-175˚E), during the period of July 1 to August 25, 2004 by commercial trawl
During the survey, acoustic data was collected and bottomtrawls were conducted at the same time. ... Wang method(Wang et al., 2015; Park et al., 2015), the species compositions and catch rate from each bottom ... An acoustic and trawl pilot survey using a small vessel was conducted in Jinhae bay of the South Sea
Estimation of the gear shape and cross section of sweep at mouth of a bottomtrawl net was described ... In case of a bottomtrawl with warp 180m long, the radius of ellipse, the cross section of sweep at mouth ... trawl.
trawl net. ... trawl net which can be used in sea mount of North Pacific. ... experiment using circulation water channel was carried out to investigate the dynamic characteristics of bottom
The angle of attack of a cambered otter board in a bottomtrawl was estimated using a three-dimensional ... trawl obtained by the Scanmar system. ... semi-analytic treatment of a towing cable (warp) system that was applied to the field experiments of a bottom
The GHG emissions from the representative fishes caught by bottom pair trawl will be dealt with. ... Here, we calculated the GHG emission from Korean bottom pair trawl fishery using the LCA (Life Cycle ... trawls, reduction of resources by fishing and damage of ecosystem diversity.
trawl in the coastal waters off Sejon island from May, 2011 to March, 2012. ... The study aims at analyzing a species composition of the fish live in bottom of the coastal waters off ... fluctuation of the dominant species and it's appearance type were analyzed with the fishes caught by the bottom
since the towing speed of a bottomtrawl ship is a low speed of 3 to 4 knots. ... Based on navigation data, trawl fishing data, and engine performance data acquired during the towing ... Likewise, it is thought that the effects of wind and current have a great impact on the trawl ship control
trawl in April, July, August, and November 2022 in the East China Sea. ... This study was investigated in order to find composition and density of fisheries resource using bottom
Fish samples were collected by bottom trawling from 10 trawl stations randomly selected in the survey ... The average weight per cubic meter of trawl catches collected by bottom trawling in the Cheju southeastern ... The combined hydroacoustic and bottomtrawl surveys were conducted in the Cheju southeastern area by
From the results of combined bottomtrawl and hydroacoustic surveys, the estunated fish densities in ... and abundance of fish in the Cheju southeastern area was studied by the combined hydroacoustic and bottom ... The highest demersal concentrations in the southern area of the CheJu Island appeared in bottom waters
as the values of full-scale bottomtrawl net. ... personal computer and real sea trial fishing were carried out to investigate the basic efficiency of bottom ... trawl net which can be used in the sea mount of North West Pacific, and experimental values were analyzed
use otter board for bottom trawling directly for the midwater trawling without any change makes the ... Although the otter board in the midwater trawling should be lighter than that for bottom trawling, to ... The otter board for bottom trawling. is also used for the midwater trawling without any change even though
Fish samples were collected by bottom trawling from 9 trawl stations randomly selected in the survey ... m from bottom friction were -74.6 ㏈ and -68.2 ㏈, respectively. ... area, and the species and length compositions of trawl catches are examined.
and the weight (C, kg/m3) per cubic meter of the catch sampled by bottom trawling in the southern waters ... layer of the 0-10 m from bottom friction were -68.8 dB, -70.2 dB, respectively. ... catch per unit volume of the water column sampled by demersal trawls.
A species composition and population structure of fish, collected 16 times by bottom otter trawl in ... The fish species caught by bottom otter trawl from year 2002 to 2005 was entirely 72 species, 41 classes ... The diversity index of species per months of the collected by a small otter trawl in coastal water of
exclusive economic zone of the West Sea of South Korea including 18 sea-blocks were investigated using a bottom ... Each trawl shot was conducted for an hour in each sea-block and the total trawl shots was 18. ... trawl gear of the R/V Tamgtu 20 (National Institute of Fisheries Science) from 24th April 2011 to 4th
The purpose of this study is to identify the flow resistance of the bottom pair trawl nets. ... The bottom pair trawl nets being used in fishing vessel (100G/T, 550ps) was selected as a full-scale ... pair trawl net could show R =4.9Sv1.55 using these values.