SC/T 9609-2020 in English
VALIDTechnical specification for ex-situ conservation of the Yangtze finless porpoise
- Issued on:2020-08-26
- Implemented on:2021-01-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
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Introduction
Analysis of the core content of the standard
This standard proposes systematic technical requirements for the ex situ conservation of the Yangtze River porpoise (Neophocaena asiaeorientalis), and is applicable to conservation scenarios when the population size drops to "endangered" or "critically endangered" status.
Key Technical Indicators
| Indicator Category | Specific Requirements | Scientific Basis |
|---|---|---|
| Water Depth | 3-15 meters | Simulate the Hydrological Characteristics of Natural Habitats |
| Forage Fish Species | ≥7 species (including ≥3 species with palatability) | Ensure Food Diversity |
| Founder Group | 8-10 heads (male-female ratio 1:1) | Avoid inbreeding |
Detailed explanation of implementation points
1. Habitat construction
The water area should meet the following requirements: no commercial shipping, no pollution source, natural bottom, and maintain Class II water quality standards (GB 3838-2002). Typical successful cases include Tian'ezhou Nature Reserve, whose beach topography effectively simulates the natural habitat of the Yangtze River.
2. Population dynamic management
The sustainable population size is calculated through the carrying capacity formula: Cy=Fp/Fd (Fd is 1825kg/year·head), and the individual exchange mechanism needs to be activated when the capacity reaches 50%.
Analysis of Standard Evolution
Compared with early conservation practices, this standard innovatively:
- Introduces genetic archive requirements (SC/T 9409-2012)
- Standardizes the physical examination index system (SC/T 9607-2018)
- Establishes a three-dimensional archive system (environment/population/activity)
Operational recommendations
Transportation link: Strictly follow the SC/T 9608 regulations, and conduct behavioral observations for more than 30 minutes before and after transportation. The individual migration case of Poyang Lake in 2022 showed that the use of shock-absorbing water tanks for transportation can reduce stress responses by 42%.
Patrol management: It is recommended to configure infrared monitoring equipment to assist visual observation, and control the patrol speed at 7-8km/h to ensure an effective observation distance of 200 meters.
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