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Fish and plankton collection trawl

A plankton and trawling technology, which is applied in fishing, fishing nets, applications, etc., can solve the problems of poor flexibility in use and inability to realize variable water layer collection, and achieve the effects of accurate and reliable sampling, high versatility and flexibility

Active Publication Date: 2017-11-24
MARINE FISHERIES RES INST OF ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such trawls can only collect in fixed water layers, and cannot achieve variable water layer collection, so the flexibility of use is poor

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0019] Such as figure 1 In the illustrated embodiment, a fish plankton collection trawl includes a net bag 6 and a bracket 9 fixed at the opening of the net bag. The bottom of the net bag is provided with a net bag 7, and both the net bag and the net bag adopt a higher mesh number. Made of net clothing, it is convenient to collect roe and larvae. There are several detachable floating balls 4 and iron balls 2 on the side of the support. The support is ring-shaped. The floating balls and iron balls are evenly arranged around the outside of the support. The support is provided with a support rod 3 for positioning the float and iron balls. , Floating ball and iron ball can be fixed to the bracket rod body by hook hanging, which is convenient for installation and disassembly during adjustment.

[0020] An interception device covering the opening of the net bag is arranged in the support, and the interception device includes an interception screen, and the mesh number of the intercepti...

Embodiment 2

[0023] Such as figure 1 In the illustrated embodiment, a fish plankton collection trawl includes a net bag 6 and a bracket 9 fixed at the opening of the net bag. The bottom of the net bag is provided with a net bag 7, and both the net bag and the net bag adopt a higher mesh number. Made of net clothing, it is convenient to collect roe and larvae. There are several detachable floating balls 4 and iron balls 2 on the side of the support. The support is ring-shaped. The floating balls and iron balls are evenly arranged around the outside of the support. The support is provided with a support rod 3 for positioning the float and iron balls. , Floating ball and iron ball can be fixed to the bracket rod body by hook hanging, which is convenient for installation and disassembly during adjustment.

[0024] An interception device covering the opening of the net bag is arranged in the support, and the interception device includes an interception screen, and the mesh number of the intercepti...

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Abstract

The invention discloses a fish and plankton collection trawl which comprises a net and a support fixed to the opening of the net. A cod-end is arranged at the bottom of the net; an intercepting device covering the opening of the net is arranged in the support; a plurality of floating balls and iron balls which are detachable are arranged on the side surface of the support; tow lines are arranged at the edge of the support. The fish and plankton collection trawl can realize accurate collection of fish and plankton at different water levels.

Description

Technical field [0001] The invention belongs to the technical field of fishery, and particularly relates to a fish plankton collection trawl. Background technique [0002] In recent years, the state has paid more and more attention to fishery resources, and successively issued the "Announcement of the Ministry of Agriculture on the Implementation of the Minimum Net Size System for Marine Fishing Gear and Transitional Fishing Gear" and the "Catchable Specifications for Important Fishery Resources Part One: Marine Economic Fish" ”And other relevant announcements and standards, as the basis for protecting fishery resources. In the protection of fishery resources, fish eggs and larvae are the basis for the supplement of fish resources and the sustainable utilization of fishery biological resources. They are of great significance in studying the distribution of marine fish resources and determining the fishing grounds and floods. Carrying out fish roe and larval fish surveys is parti...

Claims

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Application Information

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IPC IPC(8): A01K73/02A01K73/06
CPCA01K73/025A01K73/06
Inventor 徐国强陈峰朱文斌周永东
Owner MARINE FISHERIES RES INST OF ZHEJIANG
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