SC/T 5709-2019 in English
VALIDClassification of goldfish- -Bubble- -eye
- Issued on:2019-08-01
- Implemented on:2019-11-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$59.00
| Standard No: | SC/T 5709-2019 |
| Document status: | VALID |
| Title in English: | Classification of goldfish- -Bubble- -eye |
| Title in Chinese: | 金鱼分级 水泡眼 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2019-08-01 |
| Implemented on: | 2019-11-01 |
| Professional Classification: | SC-Aquaculture |
| Related Topics: | Eye
lao fish in english goldfish blister Fish and Water Fisheye Measuring Table grade water one Fish eye detection Single fish eye arrives |
Introduction
Standard Background and Significance
SC/T 5709-2019 is the first special grading standard for bubble-eye goldfish in my country. It was proposed by the Fisheries Administration of the Ministry of Agriculture and Rural Affairs and is under the jurisdiction of the Ornamental Fish Sub-Technical Committee of the National Technical Committee for Aquatic Products Standardization. This standard fills the gap in the standardization of sub-categories of ornamental fish and is of great significance for regulating market transactions and guiding breeding and improvement.
Definition of core terms
The standard clearly defines Bubble-eye goldfish as "a variant with a translucent sac under each eyeball", and its typical characteristics include:
- Body structure without dorsal fin
- Long oval body shape (height/length ratio ≥0.34)
- Red, yellow, blue, black, white and their combined body colors
Grading index system
| Indicator dimensions | Special requirements | First-level requirements | Second-level requirements |
|---|---|---|---|
| Body proportions | Height/length ≥0.45 | Body height/body length ≥0.39 | Body height/body length ≥0.34 |
| Blister morphology | Aspect ratio 0.9-1.5 | Aspect ratio 0.7-0.89 or 1.51-1.8 | Aspect ratio <0.7 or >1.8 |
| Symmetry | Volume difference between two bubbles ≤5% | Volume difference between two bubbles ≤20% | Volume difference between two bubbles＞40% |
Key technical indicator detection
Calculation of bubble projection area
Use the ellipse area formula: S=π×a×b (a is the major semi-axis, b is the minor semi-axis). Things to note in actual operation:
- Keep the goldfish still during measurement
- Use a vernier caliper to measure with an accuracy of 0.1mm
- The long axis of the bubble should be at an angle of 105°-120° to the longitudinal axis of the body
Implementation suggestions
For different application scenarios:
- Breeding farms: focus on selecting parents with height/length>0.42 and bubble symmetry>90%
- Competition judging: The weight of color quality can be increased to 30%, and any individuals with dorsal fin scars must be excluded
- Commodity circulation: The recommended retail price of second-grade standard fish shall not exceed 40% of that of special-grade fish
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