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Habitat construction method for lamprey lei
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A construction method and lamprey technology are applied in the field of habitat construction at any time for lamprey lei, which can solve the problem of late start of habitat restoration research, and achieve the effects of expanding habitat area, improving habitat suitability, and improving habitat environment.
Inactive Publication Date: 2020-05-12
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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However, the habitat restoration of rare fishes in rivers in cold regions has not yet been carried out in my country. At present, in addition to the use of multiplication and releasing as a measure for the restoration of rare fish resources in rivers in cold regions, research on the habitat restoration of rare fishes in rivers in other cold regions has started. Late, and the habitat restoration project for Lamprey ray's has not been reported yet
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Embodiment 1
[0079] A method for constructing a habitat for lamprey ray's lamprey, comprising the steps of:
[0080] Step 1 River section selection
[0081] In May 2017, the plain river section of the main stream of the Wutong River, a primary tributary of the Songhua River, was selected to carry out the habitat construction work for Lamprey rayii. The water quality in this area is good, and it is in Class III water all the year round, and occasionally Class IV water, and the water temperature is between 10-15 degrees Celsius. During the period, after prior fishing and identification of fish species, there were lampreys living in the waters, and other fish species were mainly Heilongjiang squid, wheat ear, loach, and northern eel. The river section for habitat construction was 300m long. , the water velocity within 4m near the shore is between 0.1-0.4m / s, and the water depth is less than 0.6m;
[0082] Step 2. Lay a plurality of height-adjustable river benthos avoidance devices at interva...
Embodiment 2
[0098] Step 1 River section selection
[0099] In late May 2017, the middle and lower reaches of the main stream of the Wutong River, a primary tributary of the Songhua River, were selected to carry out habitat construction for lampreys. The water quality in this area is good, and it is in Class III water all the year round, and occasionally Class IV water, and the water temperature is 10-15 Celsius, according to prior fishing and fish species identification, there are lampreys living in the waters, and other fish species are mainly Heilongjiang squid, wheat ear, crucian carp, Xingkai silver squid and other species, and the river for habitat construction The length of the section is 320m, the velocity of the water within 4m near the shore is between 0.1-0.3m / s, and the water depth is less than 0.5m;
[0100] Step 2. Lay a plurality of height-adjustable river benthos avoidance devices at intervals on the upstream river surface of the habitat construction section; the first fram...
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Abstract
The invention discloses a lethenteron reissneri habitat construction method which comprises the following steps: selecting a current river reach at which at least one lethenteron reissneri survives asa habitat construction river reach; spreading a plurality of height-adjustable river benthonic animal sheltering devices on an upstream river surface of the habitat construction river reach in a spaced mode; constructing a riparian vegetation colony along a first riparian band at the downstream of the habitat construction river reach; arranging a plurality of fixed type cobitidae fish inhabit devices on the water surface of a slow-flow shallow water area between the riparian vegetational colony and the benthonic animal sheltering devices; adding natural pebbles on a river-bed upper division area of the slow-flow shallow water area to form a plurality of grait plaques; and arranging a plurality of tree root fish nets on slow-flow deep water area at the middle downstream of the habitat construction river reach in rows in a spaced mode. The method sufficiently utilizes water quality and landform characteristics of river, quickly increases habitat area and population quantity of lethenteron reissneri by virtue of manual measures, and improves the habitat of other fishes and bentonic organisms to certain extent.
Description
technical field [0001] The invention relates to the technical field of river ecology research, in particular to a method for constructing a habitat for Lamprey ray's at any time. Background technique [0002] In recent years, with the development of society and economy and the continuous growth of population, the development of water resources and aquatic biological resources has been unprecedentedly high, and the pressure on the ecological environment of rivers is increasing. Sewage discharge, water conservancy projects, sand mining, water diversion irrigation Human activities have destroyed the habitat of aquatic organisms. Coupled with human overfishing, climate anomalies and other reasons, it eventually led to the decline of fish diversity in the Songhua River Basin, the number of endangered species has been greatly reduced, and some rare species have become extinct or even extinct. Among them, the resources of Lamprey ray's are also declining sharply, and it is current...
Claims
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