Device for quantitatively collecting large benthonic animals in bottom mud and collection method

A quantitative collection technology for benthic animals, applied in the fields of application, fish farming, animal husbandry, etc., can solve the problems of inability to do quantitative, small collection surface area, large resistance, etc., and achieve easy inspection and collection, and sampling depth Reasonable, reduce the effect of internal pressure

Active Publication Date: 2019-07-23
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The grab-type dredger can be more targeted at the surface sediment and is widely used, but its quantification is poor and it is easy to scatter when taking out the sample, and the error is large; the box-type dredger suffers from large resistance in the water body and the bottom, so it is difficult to Guaranteed the depth of collection, and can not achieve quantitative in the true sense; while the collection surface area of ​​the columnar mud sampler is small, and most of the collection is deep bottom, which has little practical significance and is even less used

Method used

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  • Device for quantitatively collecting large benthonic animals in bottom mud and collection method

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Experimental program
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Effect test

Embodiment 1

[0033] Such as figure 1 As shown, a device for quantitatively collecting macrobenthic animals in the bottom mud of the present invention includes a left grab 1 and a right grab 2 whose tops are hinged and can be buckled together, and a left grab 1 and a right grab 2 Above the top are all connected with poles 7, the middle parts of the two poles 7 intersect each other, the ends of the two poles 7 are connected with pull ropes 6, and the outsides of the left grab bucket 1 and the right grab bucket 2 are connected with a rectangular gravity partition 9.

[0034] The left grab bucket 1 and the right grab bucket 2 are left and right symmetrical, and are surrounded by a top plate, a front fan-shaped side panel, a rear fan-shaped side panel and an arc-shaped side panel. The right end surface of the left grab bucket 1 and the left end surface of the right grab bucket 2 are The feed opening is set, the top plate of the left grab 1 and the top plate of the right grab 2 are hinged to eac...

Embodiment 2

[0039] Utilize the device of embodiment 1 to carry out the method for collecting macrobenthos in the bottom mud, comprise steps as follows:

[0040] 1) Determine the collection location, collect standing in shallow water, or collect on a boat in deep water;

[0041] 2) Make sure that the inspection port 3 at the top of the left grab 1 and the right grab 2 is closed and fastened with the lock, and hook the buckle 4 with the hook 10, so that the left grab 1 and the right grab 2 are in the open state, Hold the pull rope 6, make the collection device in a state of free fall, and enter the water vertically;

[0042]3) After the acquisition device touches the bottom, the force is applied, the hook 10 is disengaged from the buckle 4, stands still for a while, and then the device is pulled up. When pulling up, the left grab bucket 1 and the right grab bucket 2 are buckled together, and at the same time grab a certain amount of water. amount of sediment;

[0043] 4) Pull the device o...

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Abstract

The invention relates to a device for quantitatively collecting large benthonic animals in bottom mud and a collection method. The device comprises a left grab bucket and a right grab bucket in left-right symmetry, the tops of the left grab bucket and the right grab bucket are hinged, the left grab bucket and the right grab bucket are fan-shaped when being closed, a supporting rod is connected above the top of each of the left grab bucket and the right grab bucket, the middles of the two supporting rods are mutually crossed, the tail ends of the supporting rods are connected with a dragging rope, a rectangular gravity partition is arranged on the outer side of each of the left grab bucket and the right grab bucket, a water leaking hole is penetratingly formed in each rectangular gravity partition, and each rectangular gravity partition and the corresponding grab bucket form a certain included angle. The device can demarcate collection depth in different sample plots to realize quantitative collection of the large benthonic animals in the bottom mud in different water areas, and can adapt to underwater bottom sediment different in hardness to accurately and quantitatively collect and catch large benthonic animals.

Description

technical field [0001] The invention relates to a device collection method for quantitatively collecting macrobenthos in bottom mud, which is suitable for the technical field of quantitative collection of macrobenthos. Background technique [0002] As the society pays more attention to the ecological environment, people pay more and more attention to the research of macrobenthic animals that can detect the health status of the ecosystem for a long time. Macrobenthos are the most widely used organisms in water quality biological evaluation. Due to the special taxonomic diversity, fixed activity sites, extensive physiological adaptation characteristics, diverse feeding patterns and nutritional relationships of macrobenthic animals, they have sensitive characteristic responses to environmental changes in the ecosystem, which can reflect hydrological characteristics , water physical and chemical indicators, surrounding vegetation and a series of subtle changes. Therefore, data...

Claims

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Application Information

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IPC IPC(8): A01K80/00
CPCA01K80/00
Inventor 徐恺刘建王仁卿
Owner SHANDONG UNIV
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