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A fish plankton collection trawl

A plankton and trawling technology, applied in fishing nets, fishing, applications, etc., can solve problems such as poor flexibility in use, inability to achieve variable water layer collection, etc., and achieve accurate and reliable sampling, versatility and flexibility.

Active Publication Date: 2019-09-24
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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  • A fish plankton collection trawl
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] like figure 1 In the shown embodiment, a kind of fish plankton collects trawl net, comprises net bag 6 and the support 9 that is fixed on the opening of net bag, and the bottom of net bag is provided with net bag 7, and net bag and net bag all adopt the higher mesh size. Made of nets for easy collection of eggs and larvae. The side of the bracket is provided with several detachable floating balls 4 and iron balls 2, the bracket is in the shape of a ring, the floating balls and iron balls are evenly arranged around the outside of the bracket, and the bracket is provided with a bracket body 3 for positioning the floating balls and iron balls , The floating ball and the iron ball can be fixed with the bracket rod body by hanging the hook body, which is convenient for installation and disassembly during adjustment.

[0020] An intercepting device covering the opening of the net bag is provided in the bracket, and the intercepting device includes an intercepting screen whos...

Embodiment 2

[0023] like figure 1 In the shown embodiment, a kind of fish plankton collects trawl net, comprises net bag 6 and the support 9 that is fixed on the opening of net bag, and the bottom of net bag is provided with net bag 7, and net bag and net bag all adopt the higher mesh size. Made of nets for easy collection of eggs and larvae. The side of the bracket is provided with several detachable floating balls 4 and iron balls 2, the bracket is in the shape of a ring, the floating balls and iron balls are evenly arranged around the outside of the bracket, and the bracket is provided with a bracket body 3 for positioning the floating balls and iron balls , The floating ball and the iron ball can be fixed with the bracket rod body by hanging the hook body, which is convenient for installation and disassembly during adjustment.

[0024] An intercepting device covering the opening of the net bag is provided in the bracket, and the intercepting device includes an intercepting screen whos...

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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, in particular to a trawl net for collecting fish plankton. Background technique [0002] In recent years, the state has paid more and more attention to fishery resources, and successively issued the "Notice of the Ministry of Agriculture on the Implementation of the Minimum Mesh Size System of Permissible Fishing Gear and Transitional Fishing Gear for Marine Fishing" and "Catchable Specifications for Important Fishery Resources Part One: Marine Economic Fish " and other relevant notices and standards, as the basis for protecting fishery resources. In the protection of fishery resources, fish eggs and larvae are the basis of fish resource replenishment and sustainable utilization of fishery biological resources. They are of great significance in studying the distribution of marine fish resources and determining the fishing season of fisheries. Carrying out the investigation of fish eggs and larva...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K73/02A01K73/06
Inventor 徐国强陈峰朱文斌周永东
Owner MARINE FISHERIES RES INST OF ZHEJIANG
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