Fishway effect evaluation method based on stable isotope method

A stable isotope and carbon stable isotope technology, applied in fish processing, instruments, data processing applications, etc., can solve problems such as fish passages that cannot be directly explained

Active Publication Date: 2021-05-28
TIANJIN RES INST FOR WATER TRANSPORT ENG M O T
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  • Description
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AI Technical Summary

Problems solved by technology

[0003] However, the current methods for evaluating the effectiveness of fishways mostly focus on the number of fish species, the number of fish passed, and the efficiency of fish passed ("Fish Passing Facilities Design Key Points and Effectiveness Evaluation", Hou Yiqun et al., Environmental Impact Assessment, 2020, No. 3 Journal of Ecology and Rural Environment, Vol. 35, No. 12, 2019, pp. 1593-1600; Fish population structure", Tan Xichang et al., Journal of Applied Ecology, No. 5, 2015, pp. 1548-1552), through simple statistics of these data from fishways, to analyze and judge the effectiveness of fishways, although these evaluations It also proves the effectiveness of the fishway to a certain extent, but it cannot directly explain whether the fishway has eliminated or partially eliminated the impact of hydraulic engineering blocking

Method used

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  • Fishway effect evaluation method based on stable isotope method
  • Fishway effect evaluation method based on stable isotope method
  • Fishway effect evaluation method based on stable isotope method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042]Evaluation Method of Fishway Effect Based on Stable Isotope Method

[0043] Proceed as follows:

[0044] (1) Select the sampling area

[0045] Take the upstream reservoir and downstream river of the fishway construction project as the sampling area. When carrying out the sampling work, according to the area of ​​the reservoir and the river, each sampling area shall have no less than 3 sampling points;

[0046] (2) Selection of sampling species

[0047] According to the historical data of the watershed where the fishway is located and the results of local surveys, select typical dominant migratory fish in the sampling area to carry out sampling and research work;

[0048] (3) Select the sampling time

[0049] The sampling time is selected according to the physiological needs of fish migration. For example, spawning migratory fish choose their spawning season to carry out sampling work, prey migratory fish choose the time when they need a lot of foraging to carry out sa...

Embodiment 2

[0074] Sampling area: a fishway A in Xiangjiang River;

[0075] Sampling species: silver carp;

[0076] Sampling mantissa: 60 tails;

[0077] Number of sampling points: 3 sampling points for upstream and downstream;

[0078] Sampling time nature: spawning migration;

[0079] Evaluation method: Evaluation was carried out according to Example 1.

[0080] Evaluation results such as figure 1 As shown, the results showed that the TAU of silver carp was 35.8, and the TAD was 33.4. OA is 25.4, which is equal to 76.0% TAD and greater than 60% TAD, so it is determined that the construction of fishway A has an excellent effect on silver carp migration.

Embodiment 3

[0082] Sampling area: a fishway B in the Han River;

[0083] Species sampled: herring;

[0084] Sampling mantissa: 60 tails;

[0085] Number of sampling points: 3 sampling points for upstream and downstream;

[0086] Sampling time nature: spawning migration;

[0087] Evaluation method: Evaluation was carried out according to Example 1.

[0088] Evaluation results such as figure 2 As shown, the results show that the TAU of herring is 20.3, and the TAD is 19.4. OA is 9.4, which is equal to 48.5% TAD, and is between 30% and 60% TAD, so it is determined that the construction of fishway B has a good effect on herring migration.

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Abstract

The invention discloses a fishway effect evaluation method based on a stable isotope method, and belongs to the technical field of fishway effect evaluation. The fishway effect evaluation method comprises the steps of stable isotope ratio determination, nutrition ecological niche estimation and fishway construction effectiveness evaluation. According to the evaluation method, one or more migratory fishes at the upstream and downstream of the hydraulic engineering are studied, and whether fishway construction eliminates the influence of the hydraulic engineering on one or more migratory fishes or not is judged and quantitatively explained from the ecological system level through comparative analysis of stable isotopes; the method has the characteristics of quick detection and stable result.

Description

technical field [0001] The invention belongs to the technical field of fishway effect evaluation, and in particular relates to a fishway effect evaluation method based on a stable isotope method. Background technique [0002] As a fish passing facility, the fishway is an ecological remedial measure for new water conservancy projects. The construction of water conservancy projects will artificially block the connectivity of river water flow, affect the material cycle and energy flow of the river ecosystem, destroy the integrity of the ecosystem, and block the upward passage of migratory fish, thereby affecting their spawning, feeding or Overwintering, etc., which in turn will lead to the reduction of migratory fish populations, and even the disappearance of species, which will not only affect fishery resources, but also lead to a decrease in biodiversity. In order to reduce the adverse effects of water conservancy projects, fishways, as an ecological compensation project to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/02
CPCG06Q10/0639G06Q50/02A22C25/08G01N27/623E02B8/085
Inventor 张智鹏李君涛王鸣岐冯小香秦菲菲刘海英张华庆孙百顺魏燕杰
Owner TIANJIN RES INST FOR WATER TRANSPORT ENG M O T
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