SU651764A1 - Method of trawl-net fishing - Google Patents

Description

(54) METHOD OF COLLARING OF RIBS BY THE CROSS

The invention relates to fisheries and is set to be used in the trawling of fish forming commercial concentrations in the coastal zone of the Pacific coast in the pre-spawning period,

The way of fishing is known, providing for the direction of its S trawl mouth with a luminous flux ij.

The known method does not provide effective direction at the mouth of the trawl fishes of the Pacific coast.

The aim of the invention is to increase the efficiency of the direction of fish in the mouth.

The goal is achieved by the fact that according to the proposed method, the luminous flux is mixed in a zigzag way across the movement of the trawl in the direction of the mouth to the plow, shadi bounded by a line, the same trawl boards, the mouth of the track and the cables. In addition, the illuminance of the luminous flux on the horizon is Tpewet-.

nor support 1-10 lux above the background,

When trawling for Pacific spawning capelin in the dark time of day (with a background illumination of 0.1-1.0 lx sea) using a calibration photocell located on the top selection of the trawl, set the level of illumination of the light flux from the searchlight on the trailing horizon by 1 to 10 PC vnie background so chtn. the magnitudes of the illumination created by the jH fan spotlight differed 10 times. This difference in lightness corresponds to capelin and

Other species of pelagic fish have a threshold value of the light barrier that causes them to leave.

Having chosen the required level of illumination of the light flux, it zigzaggingly differently moves it in the area bounded by the line connecting the raft boards and the mouth in the direction from the trawl boards to the mouth.

A cycle of lighting of the entire area is completed within a few minutes (from one mute or more depending on the behavior of the fish and the area in front of the mouth), is controlled from a fish echo sounder at the mouth of the trawl, after which these can be repeated.

For the implementation of the method, bottom trawls with a length of m and a size of up to 64 m can be used, towed by vessels with small moshzhgyyu in draft in the coastal zone.

To create a luminous flux, suiryle of the searchlight can be used in the lighting headlights, an Rfcie can be installed with the ability to move the ajo-cam mechanism out of the box.

SpossY is effective on capelin promus but can also be used on herring and gerbil.

The invention provides the direction at the mouth of the trawl fish, which turned out to be miosiuatt bounded by a line, connecting the trawl boards, the trawl mouth with cables and increasing the efficiency

prevention of care

fishing by this fish

Claims (2)

1. Spraying a fish with a trawl, envisaging its direction at the mouth of the trawl by a luminous flux, this is so that, in order to increase the efficiency of directing fish to the mouth, the luminous flux is stirred in a zigzag manner across the movement of the trawl The mouth is in an area bounded by the line connecting the trawl boards, the mouth of the trawl and cables. 2. A method according to claim 1, characterized in that the luminance of the luminous flux at the horizon of the trawling is supported by 1-10 lx of the background Sources of information taken into account in the examination 1. Borisov P. G. The use of artificial light in the world fishing industry. Yushi Industrial Industry, M., 1956, p. 34-35.