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Muddy man-made spawning site selecting and building method of plateau river schizothorax

A technology for spawning ground and schizothorax is applied in the field of site selection and construction of muddy artificial spawning grounds for schizothorax in plateau rivers, which can solve the problems of lack of research on the spawning grounds of plateau fishes, and achieve an enlarged area. Effect

Active Publication Date: 2020-01-10
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The natural history of the Qinghai-Tibet Plateau is extremely young. Affected by various factors, it has formed the highest and youngest natural geographical unit in the world with a close combination of horizontal zonality and vertical zonality. Affected by factors such as harsh natural conditions, the plateau Research on fish spawning grounds is extremely scarce

Method used

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  • Muddy man-made spawning site selecting and building method of plateau river schizothorax
  • Muddy man-made spawning site selecting and building method of plateau river schizothorax
  • Muddy man-made spawning site selecting and building method of plateau river schizothorax

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0037] Example 1: Site selection and construction of a 100m-long artificial spawning ground

[0038] (1) Mud artificial spawning grounds of Schizothorax in plateau rivers

[0039] The floodplain bank area of ​​the braided forked river section is used as the construction site for the artificial spawning ground. This place is flooded when the water rises, but the river channel is exposed when the water recedes, but there is still a small amount of water flow in the dry season. The water flow rate is small.

[0040] The location of the artificial spawning ground is as follows: figure 1As shown, the location 1 of the artificial spawning ground is located in the floodplain bank area of ​​the braided bifurcated river section, which is higher than the main channel 2 and located in the bank area of ​​the river channel. In the dry season, there is a small flow of water from the upstream main stream injected, and the flow rate is slow, forming a scene of freezing in winter; during the...

example 2

[0052] Example 2: Site selection and construction of 200m long artificial spawning ground

[0053] (1) Mud artificial spawning grounds of Schizothorax in plateau rivers

[0054] The floodplain bank area of ​​the braided forked river section is used as the construction site for the artificial spawning ground. This place is flooded when the water rises, but the river channel is exposed when the water recedes, but there is still a small amount of water flow in the dry season. The water flow rate is small.

[0055] (2) The artificial spawning ground is dug to a depth of 35cm

[0056] Select the river floodplain slow flow area with a length of about 200m and a width of 3.5m as the river section of the artificial spawning ground. The cobblestone and gravel bottom of the river section of the artificial spawning ground will be excavated to a depth of 35cm, and the original pebble and gravel bottom soil will be transported to the downstream river. The transport distance will ensure t...

example 3

[0066] Example 3: Site selection and construction of 300m long artificial spawning ground

[0067] (1) Site selection of mud artificial spawning grounds for Schizothorax in plateau rivers

[0068] The floodplain bank area of ​​the braided forked river section is used as the construction site for the artificial spawning ground. This place is flooded when the water rises, but the river channel is exposed when the water recedes, but there is still a small amount of water flow in the dry season. The water flow rate is small.

[0069] (2) The artificial spawning ground is dug to a depth of 40cm

[0070] The length of the floodplain slow-flow area of ​​the river is about 300m and the width is 4m, which is selected as the river section of the artificial spawning ground. The cobblestone and gravel bottom of the river section of the artificial spawning ground will be excavated to a depth of 40cm, and the original pebble and gravel bottom soil will be transported to the downstream riv...

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Abstract

The invention provides a muddy man-made spawning site selecting and building method of plateau river schizothorax. The method includes the steps: firstly, selecting a muddy man-made spawning site of the plateau river schizothorax; secondly, deeply digging the man-made spawning site to reach 30-40cm; thirdly, preparing mud substrates; fourthly, covering the man-made spawning site with the mud substrates; fifthly, remodeling the topography of the spawning site. According to the method, a suitable river section is selected, the flow velocity of the area is low in flooding, so that the area adoptto spawning of the schizothorax, eggs cannot be carried away by water flow, the topography of the spawning site is flat, so that the eggs are easily attached into spawning pits, bottom substrates of the spawning site are created, pit digging behaviors of the schizothorax can be met, stability of the spawning site and the spawning pits can be maintained, and the spawning pits cannot collapse afterthe schizothorax spawns.

Description

technical field [0001] The invention relates to the field of restoration of aquatic ecological habitats, in particular to a site selection and construction method for a muddy artificial spawning ground of Schizothorax in plateau rivers. Background technique [0002] Fish spawning grounds refer to the waters where fish mate, spawn, hatch and raise young. They are important places for the survival and reproduction of aquatic organisms and play an important role in supplementing fishery resources. [0003] Different fish spawning grounds have different formation mechanisms. The "four major family carp" and others produce floating eggs. The spawning grounds need to meet the pulse stimulation of temperature and high-flow floods. Spawning grounds are formed in river sections where the two conditions are met. There is no quality requirement, fertilized eggs need to float in a certain flow rate and a certain distance to complete the hatching; Chinese sturgeons produce sinking eggs, ...

Claims

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Application Information

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IPC IPC(8): A01K61/17
CPCA01K61/17Y02A40/81
Inventor 李伟赵良元赵伟华郭伟杰贡丹丹乔强龙
Owner CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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