CN201682896U

CN201682896U - Collection net for living beings at bottom layer of river

Info

Publication number: CN201682896U
Application number: CN 201020144261
Authority: CN
Inventors: 危起伟; 杨德国; 杜浩; 沈丽; 张辉; 刘志刚; 王崇瑞
Original assignee: Yangtze River Fisheries Research Institute CAFS
Current assignee: Yangtze River Fisheries Research Institute CAFS
Priority date: 2010-03-25
Filing date: 2010-03-25
Publication date: 2010-12-29
Anticipated expiration: 2020-03-25

Abstract

The utility model provides a collection net for living beings at the bottom layer of a river. The inlet of a net body of the collection net is provided with a net opening support; the bottom of the net opening support is provided with a steel roller; a flowmeter is arranged in the middle of the inlet of the net body; the rear part of the net body is fixed with a collector; the net opening support is connected with a pontoon and a floating mark by a steel rope; and the steel roller is connected with an iron chain and an anchor by a steel rope. The collection net for the living beings at the bottom layer of the river can provide the reliable data for the study on the biocenosis composition and the biomass at the bottom layer of the river, the demersal fishes spawning ground and the spawning effect, can also play a role of protecting the living beings at the bottom layer or the fishes oosperm from being damaged; the survival rate of samples is high, and the fishing gains are rich; in addition, the collection net has simple operation and saves labor power and material resources.

Description

The rivers stratobios is gathered net

Technical field

The utility model relates to the aquatic product fishery scientific domain, specially refers to the rivers stratobios and gathers net.

Background technology

In the research of the rivers ecosystem, stratobios group forms and reproductive behavior and the regional study of demersal fishes are difficult problems always, mainly is because the method for sampling has great limitation to the biological collection in rivers bottom at present.At present, the general simple and easy write by hand net of a terminal connection of long pole that adopts of the biological collecting method in rivers bottom, but because all objective factors, as the degree of depth of river, the flow velocity of river etc., effect is relatively poor even can not collect sample, the data science of the method acquisition simultaneously is relatively low, can not accurately reflect situation or demersal fishes breeding zones such as stratobios group richness, stock number.

Summary of the invention

It is a kind of for rivers stratobios group forms that the purpose of this utility model is to provide, and the rivers stratobios of biomass and demersal fishes reproductive behavior and regional study service is gathered net.

For achieving the above object, the technical solution of the utility model is:

The network interface support is equipped with in the import department of rivers stratobios collection net etting, the network interface support is by solid steel system, become the network interface frame bottom that steel rider is housed, current meter is equipped with in the middle part in etting import department, the rear portion of etting is fixed with gatherer, and network interface frame bottom two ends are connected with buoy with floating drum with the guiding principle rope with the top mid point, and steel rider is connected with anchor with iron chains with the guiding principle rope, the etting employing is permeable, solid, corrosion-resistant material is made the less net sheet of mesh, as thermoplastic synthetic fiber, polythene material etc.Whole etting is pre-large post-small taper, and the oral area size is identical with the support size, and front and back communicate, and rear portion connection one is made the biological gatherer that has the space by galvanized iron sheet, enters the biology of gathering net and concentrates in the gatherer at last.

Good effect of the present utility model is:

1, be that river stratobios group forms, biomass and demersal fishes spawning ground and the effect research of laying eggs etc. provides active data and service;

2, utilize the sampling of collection net, can play the effect of protection stratobios or fish oosperm;

3, cooperate the GPS location, improved the accuracy of scientific research research;

4, to gather the net material therefor durable in use in preparation, is difficult for washed away or scratched;

5, simple to operate, saved lot of manpower and material resources.

Description of drawings

Fig. 1, rivers stratobios are gathered the web frame schematic diagram.

Embodiment

Further specify embodiment of the present utility model below in conjunction with accompanying drawing 1.

Referring to Fig. 1, it is the buoyancy that utilizes impulsive force, floating drum 2 that the rivers stratobios is gathered net, the pulling force three force balance of iron chains 8 and anchor 9 opens the network interface of gathering network interface support 5 on the net etting 4, utilize the weight of steel rider 10 to make network interface be close to the rivers bottom, make current carry the flow through network interface of etting 4 of stratobios and enter in the gatherer 3 at etting 4 rear portions, after a period of time, pack up the collection net, the biology of collecting in the gatherer 3 is poured out, carried out statistics and analysis.

During operation stratobios collection net, can directly sink under water gathering net, this moment, network interface was the reverse water flow path direction, also can be equipped with a medium-sized machine barge, the larger area deck is arranged on the ship, settle a pulley on the bow, when putting net, make fore become certain included angle with current towards the upstream, rapidly to drop anchor 9 and iron chains 8, utilize iron chains 8, the weight of anchor 9 and steel rider 10 makes its sinking, hull slowly floats down downstream simultaneously, after confirming that anchor 9 is fixedly at the bottom of the river, mention network interface support 5 and vertically be thrown in the water, slowly emit the guiding principle rope 7 that ties up between network interface support 5 and the floating drum 2 simultaneously, guarantee that network interface is vertically to fall at the bottom of the river, when gathering the net entry, observe whether operate as normal of current meter 6, after confirming at the bottom of gathering net has arrived at the river, put down floating drum 2 and buoy 1, record current meter 6 initial readings, put net time and GPS site.Determine the hauling time according to actual conditions, fore is towards the upstream during hauling, at first the guiding principle rope 7 of bolt floating drum 2 is triggered and obtain floating drum 2 with cleek, utilize the pulley manpower of fore will gather the net pull-up, record current meter 6 stops reading and receives the net time, unload the gatherer 3 that is fixed on etting 4 rear portions then, with the rivers stratobioses in the gatherer 3 sort, statistics and analysis work.

Claims

1. one kind by buoy (1), floating drum (2), gatherer (3), etting (4), network interface support (5), the rivers stratobios that current meter (6) and steel rider (10) constitute is gathered net, it is characterized in that: network interface support (5) is equipped with in the import department of etting (4), steel rider (10) is equipped with in network interface support (5) bottom, current meter (6) is equipped with in the middle part in etting (4) import department, the rear portion of etting (4) is fixed with gatherer (3), two ends, network interface support (5) bottom are connected with buoy (1) with floating drum (2) with guiding principle rope (7) with the top mid point, and steel rider (10) is connected with anchor (9) with iron chains (8) with guiding principle rope (7).

2. rivers stratobios according to claim 1 is gathered net, it is characterized in that: etting (4) adopts material permeable, solid, corrosion resistant to make, as thermoplastic synthetic fiber, polythene material etc.