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A device and method for quantitatively collecting macrobenthos in sediment

A technology of quantitative collection of benthic animals, applied in the fields of application, fish farming, animal husbandry, etc., can solve problems such as inability to do quantitative, large resistance, and little practical significance, and achieve reasonable sampling depth and reduce Effect of water resistance, ease of inspection and collection

Active Publication Date: 2021-11-26
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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  • A device and method for quantitatively collecting macrobenthos in sediment

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Effect test

Embodiment 1

[0033] As shown in Fig. 1, a kind of device of the present invention quantitatively collects macrobenthos in bottom mud, comprises the left grab bucket 1 and the right grab bucket 2 that the top is hinged and can buckle together, left grab bucket 1 and right grab bucket The top of the grab bucket 2 is connected with a support rod 7, the middle parts of the two support rods 7 cross each other, the ends of the two support rods 7 are connected with a pull rope 6, and the outer sides of the left grab bucket 1 and the right grab bucket 2 are connected with a rectangular gravity partition. plate 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 ...

Embodiment 2

[0039] Utilize the device of embodiment 1 to carry out the method for collecting macrobenthos in 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 out of...

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Abstract

The invention relates to a device and a collection method for quantitatively collecting large benthic animals in bottom mud, which comprises symmetrical left and right grabs, the tops of which are hinged, and When the grab is closed, it is fan-shaped, and the tops of the left and right grabs are connected with poles. The outside of the bucket is provided with a rectangular gravity partition, and there are leaking holes running through the rectangular gravity partition. The rectangular gravity partition and the grab bucket form a certain angle. The invention can calibrate the collection depth in different places, so as to realize the The quantitative collection of macrobenthic animals in the sediment can also adapt to underwater substrates of different softness and hardness, and accurately and quantitatively collect and collect macrobenthos.

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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Patent Type & Authority Patents(China)
IPC IPC(8): A01K80/00
CPCA01K80/00
Inventor 徐恺刘建王仁卿
Owner SHANDONG UNIV
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