阅读说明：本技术 一种海洋生物捕捞方法 (Marine organism fishing method ) 是由 徐国强 陈�峰 周永东 张洪亮 于 2020-06-01 设计创作，主要内容包括：本发明公开了一种海洋生物捕捞方法,旨在提供一种不仅有利于幼鱼释放,而且有利于提高被释放的幼鱼的存活率的海洋生物捕捞方法。海洋生物捕捞方法,采用旋转式捕捞装置进行捕捞。旋转式捕捞装置包括浮架、转动设置在浮架上的竖向轴杆、设置在浮架上用于驱动竖向轴杆的驱动电机、设置在竖向轴杆下端的环形安装架及若干设置环形安装架上的捕捞网装置。海洋生物捕捞方法依次包括以下步骤：第一,捕捞船航行至指定海域,将旋转式捕捞装置投放到海域中；第二,捕捞船航行,捕捞船通过连接绳带动旋转式捕捞装置移动；同时,驱动电机工作；第三,捕捞船停止航行,同时,驱动电机停止工作；第四,返回第二步,如此循环。(The invention discloses a marine organism fishing method, and aims to provide a marine organism fishing method which is not only beneficial to release of juvenile fishes, but also beneficial to improving the survival rate of the released juvenile fishes. The marine organism fishing method adopts a rotary fishing device to fish. The rotary fishing device comprises a floating frame, a vertical shaft rod rotatably arranged on the floating frame, a driving motor arranged on the floating frame and used for driving the vertical shaft rod, an annular mounting frame arranged at the lower end of the vertical shaft rod and a plurality of fishing net devices arranged on the annular mounting frame. The marine organism fishing method sequentially comprises the following steps: firstly, sailing a fishing boat to a designated sea area, and throwing a rotary fishing device into the sea area; secondly, the fishing boat sails, and the fishing boat drives the rotary fishing device to move through the connecting rope; meanwhile, the driving motor works; thirdly, stopping sailing of the fishing boat, and stopping the driving motor; fourthly, returning to the second step, and circulating in such a way.)

1. A marine organism fishing method is characterized in that a rotary fishing device is adopted for fishing, the rotary fishing device comprises a floating frame, a vertical shaft rod rotationally arranged on the floating frame, a driving motor arranged on the floating frame and used for driving the vertical shaft rod, an annular mounting frame arranged at the lower end of the vertical shaft rod and a plurality of fishing net devices arranged on the annular mounting frame, each fishing net device is uniformly distributed around the circumference of the vertical shaft rod, each fishing net device comprises a fishing net, a radial shaft rod arranged on the annular mounting frame and a net mouth baffle fixedly arranged on the radial shaft rod, the radial shaft rods are distributed along the radial direction of the vertical shaft rod, a net mouth support ring is arranged at a net mouth of the fishing net, the net mouth support ring is rotationally arranged on the radial shaft rod, and when a net mouth of the fishing net is upward, the net mouth of the fishing net is shielded by the corresponding net mouth baffle;

the marine organism fishing method sequentially comprises the following steps:

firstly, a fishing boat sails to a designated sea area, and the fishing boat is connected with a floating frame of a rotary fishing device through a connecting rope; then, the rotary fishing device is thrown into the sea area, floats on the sea through the floating frame, and is positioned in the water;

secondly, the fishing boat sails, and the fishing boat drives the rotary fishing device to move through the connecting rope; meanwhile, the driving motor works, the working time of the driving motor is set to be H1 hours, the driving motor drives each fishing net device to rotate through the vertical shaft rod, in the process, the fishing nets are subjected to the action of water flow resistance, and the net mouth support rings of the fishing nets rotate around the radial shaft rods to be vertically distributed, so that seawater and marine organisms can enter the fishing nets through the net mouths of the fishing nets;

thirdly, stopping sailing of the fishing boat, stopping the operation of the driving motor, and setting the stop operation time of the driving motor to be H2 hours; in the process, the tail end of the fishing net falls downwards under the action of self weight, and the net mouth support ring of the fishing net rotates around the radial shaft rod to enable the net mouths of the fishing net to be distributed upwards so as to enable the net mouths of the fishing net to be shielded by the corresponding net mouth baffle plates;

fourthly, returning to the second step, and circulating in such a way.

2. The marine organism fishing method according to claim 1, wherein in the second step, the speed of the ship is less than 10 knots.

3. The marine organism fishing method according to claim 1, wherein in the second step, the fishing vessel travels at a constant speed.

4. A method as claimed in claim 1, 2 or 3, wherein said net mouth baffles are horizontally disposed.

5. A method for harvesting marine organisms according to claim 1, 2 or 3, wherein said harvesting net is cylindrical.

6. A method as claimed in claim 1, 2 or 3, wherein the mesh ring is circular and the mesh baffle is circular.

7. A marine organism fishing method according to claim 1, 2 or 3, wherein the number of the fishing net devices is three.

Technical Field

The invention relates to the field of marine fishing, in particular to a marine organism fishing method.

Background

With the increasing emphasis on fishery resources in various countries, research on fishing gear selectivity is gradually developed. At present, in selective research, the size of meshes is generally changed, juvenile fishes are released by changing the size of the meshes, and the sustainable development of fishery resources is improved; however, in both research experiments and actual fishing processes, it is found that the effect is not ideal if young fishes are simply released by changing the mesh size; the inventor finds that the current fishing generally adopts a continuous trawl fishing mode, and the shape and the size of meshes of the trawl can be changed due to the impact of water flow in the trawl fishing process, so that the trawl is not beneficial to releasing juvenile fish; and fishes and the like are greatly extruded at the tail end of the trawl due to the impact of water flow, and the young fishes are difficult to release through meshes.

Disclosure of Invention

The invention aims to provide a marine organism fishing method which is not only beneficial to the release of juvenile fishes, but also beneficial to the improvement of the survival rate of the released juvenile fishes.

The technical scheme of the invention is as follows:

a marine organism fishing method adopts a rotary fishing device for fishing, wherein the rotary fishing device comprises a floating frame, a vertical shaft rod rotationally arranged on the floating frame, a driving motor arranged on the floating frame and used for driving the vertical shaft rod, an annular mounting frame arranged at the lower end of the vertical shaft rod and a plurality of fishing net devices arranged on the annular mounting frame, wherein the fishing net devices are uniformly distributed circumferentially around the vertical shaft rod;

the marine organism fishing method sequentially comprises the following steps:

firstly, a fishing boat sails to a designated sea area, and the fishing boat is connected with a floating frame of a rotary fishing device through a connecting rope; then, the rotary fishing device is thrown into the sea area, floats on the sea through the floating frame, and is positioned in the water;

secondly, the fishing boat sails, and the fishing boat drives the rotary fishing device to move through the connecting rope; meanwhile, the driving motor works, the working time of the driving motor is set to be H1 hours, the driving motor drives each fishing net device to rotate through the vertical shaft rod, in the process, the fishing nets are subjected to the action of water flow resistance, and the net mouth support rings of the fishing nets rotate around the radial shaft rods to be vertically distributed, so that seawater and marine organisms can enter the fishing nets through the net mouths of the fishing nets;

thirdly, stopping sailing of the fishing boat, stopping the operation of the driving motor, and setting the stop operation time of the driving motor to be H2 hours; in the process, the tail end of the fishing net falls downwards under the action of self weight, and the net mouth support ring of the fishing net rotates around the radial shaft rod to enable the net mouths of the fishing net to be distributed upwards so as to enable the net mouths of the fishing net to be shielded by the corresponding net mouth baffle plates;

fourthly, returning to the second step, and circulating in such a way.

The marine organism fishing method changes the fishing method of the traditional trawl, the rotary type fishing device is adopted for fishing, and the fishing is carried out in an intermittent rotation mode in the fishing process; this is so:

in the second step, when the driving motor drives each fishing net device to rotate through the vertical shaft rod, the fishing nets are acted by the flow resistance force of water, the net mouth support rings of the fishing nets rotate around the radial shaft rods to be vertically distributed (namely, the net mouths of the fishing nets are vertically distributed, and the net mouth baffles are horizontally distributed), so that seawater and marine organisms can enter the fishing nets through the net mouths of the fishing nets, and the fishes in the fishing nets are gathered at the tail ends of the trawls under the action of water flow impact, so as to realize the fishing of the marine organisms;

in the third step, the annular mounting frame and the fishing net device stop rotating by stopping the driving motor, the tail end of the fishing net falls down under the action of self weight, and the net mouth support ring of the fishing net rotates around the radial shaft rod to enable the net mouths of the fishing net to be distributed upwards so that the net mouths of the fishing net are shielded by the corresponding net mouth baffle plates; the fishing net stops rotating, and the net mouth baffle shields the net mouth of the fishing net, so that a large number of fishes in the fishing net cannot be impacted by water flow in the process, are extruded at the tail end of the trawl and can freely move in the fishing net, therefore, juvenile fishes can be released through the net holes of the fishing net, and the juvenile fishes are not extruded for a long time, so that the injury of extrusion of the juvenile fishes can be reduced, and the survival rate of the released juvenile fishes is improved; meanwhile, as the net mouth baffle blocks the net mouth of the fishing net, the grown fishes and other fishes with larger size are still continuously left in the fishing net.

Preferably, in the second step, the sailing speed of the fishing boat is less than 10 knots.

Preferably, in the second step, the fishing boat travels at a constant speed.

Preferably, the net mouth baffles are horizontally distributed.

Preferably, the fishing net is cylindrical.

Preferably, the net opening support ring is circular, and the net opening baffle is circular.

Preferably, the number of the fishing net devices is three.

The invention has the beneficial effects that: not only is beneficial to the release of the juvenile fish, but also is beneficial to improving the survival rate of the released juvenile fish.

Drawings

FIG. 1 is a schematic view of a rotary fishing apparatus of the present invention.

Fig. 2 is a view from a in fig. 1.

FIG. 3 is a partial structural view of the rotary fishing device of the present invention during the operation of the driving motor.

In the figure:

a floating frame 1;

a vertical shaft 2;

a drive motor 3;

an annular mounting frame 4;

the fishing net device 5, fishing net 5.1, radial axostylus axostyle 5.2, net gape baffle 5.3, net gape support ring 5.4.

One aspect of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention are clearly explained and illustrated below with reference to the accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present scheme, and are not construed as limiting the scheme of the present invention.

These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited thereby. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.

In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "several" means one or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.