Method for constructing schizothoracinae artificial spawning site in natural river

A construction method and spawning ground technology, applied in fish farming, agricultural fishing, climate change adaptation, etc., can solve problems that hinder the development of artificial breeding and release protection measures, and achieve sustainable use of maintenance, easy implementation, and technical requirements low effect

Inactive Publication Date: 2013-09-04
YANGTZE RIVER FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially for Schizothorax adapted to the habitat of torrents in canyons and mountainous areas, artificial reproduction technology is a bottleneck in current fish research, which hinders the development of artificial breeding and release protection measures to a certain extent

Method used

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  • Method for constructing schizothoracinae artificial spawning site in natural river
  • Method for constructing schizothoracinae artificial spawning site in natural river

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Preliminary preparation

[0026] (1) Selection of target fish: Through on-site investigation and historical documents, the Sichuan Schizothorax was determined to be the target fish. Overexploitation, the amount of resources of this type decreased significantly.

[0027] (2) Understand the ecological habits of the target fish: the spawning period of Sichuan Schizothorax is from March to April every year, and the middle and late March is the peak breeding period. During the spawning period, there is a clustering behavior, and the male fish has the habit of building nests. The shoal has a pebble-sediment mixed bottom and spawns well. The spawning is sticky. The weight range of Sichuan Schizothorax is 30-121g, the average weight is 65.6g, and the body length ranges 12.5-17cm, with an average body length of 13.8cm.

[0028] 2. Selection of spawning ground construction sites: On the river section within 20 kilometers downstream of the Guandi Power Station Dam, three rive...

Embodiment 2

[0050] see figure 1 and figure 2

[0051] 1. Preliminary preparation

[0052] (1) Selection of target fish: through on-site investigation and historical documents, Schizothorax was determined as the target fish, and Schizothorax is one of the main economic fishes in the downstream section of Yalong River Guandi Hydropower Station. Due to excessive utilization of resources, the amount of resources in this category has declined significantly.

[0053] (2) Understand the ecological habits of the target fish: the spawning period of Schizothorax brevista is from March to April every year. During the spawning period, there is a clustering behavior, and the male fish has the habit of building nests. It spawns well in the shoal with pebbles and sediment mixed bottom. The spawning is sticky. The range is 12.2-18.2cm, and the average body length is 14.2cm.

[0054] 2. Selection of spawning ground construction sites: On the river section within 20 kilometers downstream of the Guand...

Embodiment 3

[0076] see figure 1 and figure 2

[0077] 1. Preliminary preparation

[0078] (1) Selection of target fish: Schizothorax schizothorax was determined as the target fish through on-site investigation and historical documents. Schizothorax was once one of the main economic fish in the downstream section of Yalong River Guandi Hydropower Station , due to excessive utilization of resources, the amount of resources of this type has dropped significantly.

[0079] (2) Understand the ecological habits of the target fish: the spawning period of Schizothorax schizothorax is concentrated in late March every year. The weight range of Schizothorax is 32-139g, the average body weight is 70.6g, the body length ranges from 12.8-18.8cm, and the average body length is 14.2cm.

[0080] 2. Selection of spawning ground construction sites: On the river section within 20 kilometers downstream of the Guandi Power Station Dam, three river sections suitable for building fish spawning grounds were ...

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Abstract

The invention provides a method for constructing a schizothoracinae artificial spawning site a natural river. The method comprises a first step of carrying out previous preparation, a second step of selecting a construction site of the spawning site, a third step of determining parameters, a fourth step of determining the scale and the structure of the spawning site, a fifth step of determining the paving method of a structural unit, a sixth step of constructing auxiliary facilities and a seventh step of managing and maintaining. According to the method, under the condition that normal operation of a hydropower station is not affected, a shoal can be constructed manually in an appropriate river reach to provide the site of egg reproduction for the schizothoracinae, and the schizothoracinae can be successfully multiplied. The contradiction between river hydroelectric development and ecological protection can be effectively relieved. The scale and the appropriate river reach of the artificial spawning site can be determined according to reach fish resource quantity, labor management serves as an auxiliary means, and the sustainable utilization of the reach fish resources can be well maintained.

Description

technical field [0001] The invention relates to the field of fishery resource protection, in particular to a method for constructing an artificial spawning ground for Schizothorax in natural rivers. Background technique [0002] Since the beginning of the new century, China has embarked on an unprecedented wave of river hydropower development. With the increasing demand for energy in the development of the west and the construction of the country, cascade hydropower stations have been built to varying degrees on the rivers in the west. Most of the rivers in the west are canyon-type rivers with turbulent water flow. At the same time, there are some "beach" and "tuo" with slow water flow and many gravels. This kind of slow and fast water flow conditions can meet the breeding requirements of different fishes. For Schizothorax, after the eggs are laid, the development time is generally longer, and the eggs are mostly scattered on the gravel beach, and most of them fall into the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCY02A40/81Y02P60/60
Inventor 刘明典刘绍平陈大庆段辛斌王珂
Owner YANGTZE RIVER FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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