CN2788557Y

CN2788557Y - Sea fishing resources monitoring and survey trawl

Info

Publication number: CN2788557Y
Application number: CN 200520039124
Authority: CN
Inventors: 黄洪亮; 程家骅
Original assignee: East China Sea Fishery Research Institute Chinese Academy of Fishery Sciences
Current assignee: East China Sea Fishery Research Institute Chinese Academy of Fishery Sciences
Priority date: 2005-01-20
Filing date: 2005-01-20
Publication date: 2006-06-21
Anticipated expiration: 2015-01-20

Abstract

The utility model relates to a sea fishing resource monitoring and surveying trawl, particularly a sea catching trawl net. The technical problem of the utility model to be solved is to provide a trawl net which is suitable for trawlers with different host machine power to use as well as satisfies the sea fishing resource monitoring and surveying use of the East China Sea. The utility model is composed of a drag rope, a cross rope, an upper rope, a lower rope, a force rope, a sleeve net, a cover net, a net body and a net bag, wherein a net cost is a high-strength polyethylene rhombic mesh, and a floating and sinking force device is composed of an upper rope knot float and a lower rope knot float. The utility model is characterized in that the number of the circumference meshes of the net, a net mouth and the mesh is 96 meshes, the sizes of the net mouth and the mesh are 4m, the tightening perimeter of the net mouth is 392m, the length of the lower rope of the net is 96.3m, the length of the upper rope is 88m and the floating and sinking force device is 0.9: 1. The utility model is suitable for monitoring and surveying sea fishing resources.

Description

Marine fishery resources monitoring and surveying trawlnet

Technical field:

The utility model relates to marine fishing trawlnet netting gear.

Background technology

The trawlnet netting gear is mainly formed by draging guiding principle, fork guiding principle, headline, infraclass, manrope, sleeve net, cover net, body, net capsule, and the etting mesh all adopts rhombus order structure, and the power of drifting along is equipped with to be tied up float and infraclass by the knot of raising to the higher plane of principle and tie and tie up sinker and constitute.The fishing boat that participates in sea area, China East Sea fishery resources monitoring task comes respectively from Jiangsu Province, Zhejiang Province and Shanghai City at present, fishing boat main engine power 198-258kW, and difference is bigger, the trawlnet netting gear specification difference of the trawler configuration that main engine power is different.Though the structure of body all adopts size of mesh to reduce gradually to keed from the sleeve net, the mesh number of body increases to the body rear portion gradually from the sleeve net, reduce gradually to keed from the body rear portion again, the form that each section net sheet height order number of weaving into body increases to keed gradually from the net of tucking inside the sleeve, but network interface is partly strained girth and is not waited from 300-480m, and it is inequality to form the netting gear specification.Because net gap perimeter is different with the size of mesh specification, catching rate has nothing in common with each other, and investigation result can't correctly reflect by the truth of investigation sea area fishery resources.Therefore, in the fishery resources monitoring evaluation process, occur bigger deviation easily, cause certain error for final stock assessment, be unfavorable for China's Fisheries Resources Management.

The utility model content

The utility model technical issues that need to address provide a kind of both suitable different main engine power trawler trawlnets and fish for use, satisfy the trawlnet netting gear that East Sea district marine fishery resources monitoring and surveying uses again.

The technical solution of the utility model adopts drags guiding principle, fork guiding principle, headline, infraclass, manrope, sleeve net, cover net, body, net capsule composition, etting is the high-strength polyethylene diamond mesh, the power of drifting along is equipped with to be tied up float and infraclass by the knot of raising to the higher plane of principle and ties and tie up sinker and constitute, it is characterized in that all order numbers of netting gear network interface mesh are 96 orders, network interface size of mesh is 4m, and network interface tension girth is 392m, and netting gear infraclass length is 96.3m, headline length is 88m, and the power of drifting along is provided as 0.9: 1.

It is the etting material that the utility model adopts high-strength polyethylene, effectively reduces the line area of trawlnet netting gear, reduces the mesh resistance, makes different main engine power trawlers can keep the unification of trawlnet speed in the observation process; The utility model keeps network interface drainage area unanimity during the process of the investigation, the marine fishery resources assessment data is carried out under the prerequisite of collecting method unanimity, avoid because of investigative technique and the inconsistent resultant error that causes of instrument, improved the reliability of Monitoring Data the assessment of fishery resources amount.

Description of drawings

What accompanying drawing was represented is monitoring resource net 96 orders-4000mm sleeve net schematic diagram.

Embodiment

Realize best way of the present utility model below in conjunction with description of drawings: the utility model is formed by draging guiding principle, fork guiding principle, headline, infraclass, manrope, sleeve net, cover net, body, net capsule, etting is the high-strength polyethylene diamond mesh, and the power of drifting along that the sinker that float that the knot of raising to the higher plane of principle is tied up and infraclass knot are tied up constitutes is provided as 0.9: 1; Several 96 orders of netting gear network interface week order, 1,10,20,30,40,48 of accompanying drawing downside sign are that the order of network interface half cycle is counted station number, and network interface size of mesh is 4m, and network interface tension girth is 392m; Left side heavy line is represented infraclass in the middle of the figure top, top arrow symbol expression infraclass length 96.3m down, and the 24,8.8,7.5, the 15.7th of infraclass sign is cut out than corresponding infraclass length with the different of net sheet edge; Heavy line is represented to raise to the higher plane of principle on the right of in the middle of the figure top, and the top is arrow symbol expression headline length 88m up, and the 8,20,7.6, the 16.8th of the sign that raises to the higher plane of principle is cut out than corresponding headline length with the different of net sheet edge; 1-1,1-2,1-3 represent that respectively this net sheet edge cuts out ratio accordingly among the figure, and 14 meters length angry eyes of 14 these sections of expression are cut out among the figure; It is that full order pin is cut out, 5 orders are that a vertical and one horizontal is cut out that the figure right side indicates 4.5 orders, and sleeve net height degree order number is 9.5.

Claims

1, marine fishery resources monitoring and surveying trawlnet is formed by draging guiding principle, fork guiding principle, headline, infraclass, manrope, sleeve net, cover net, body, net capsule, etting is the high-strength polyethylene diamond mesh, the power of drifting along is equipped with to be tied up float and infraclass by the knot of raising to the higher plane of principle and ties and tie up sinker and constitute, it is characterized in that all order numbers of netting gear network interface mesh are 96 orders, network interface size of mesh is 4m, and network interface tension girth is 392m, and netting gear infraclass length is 96.3m, headline length is 88m, and the power of drifting along is provided as 0.9: 1.