This standard specifies the quality requirements and inspection methods for grass carp (Ctenopharyngodon idellus) fry and fingerlings. This standard applies to the quality identification of grass carp fry and fingerlings. GB/T 11776-1989 Quality standard for grass carp fry and fingerlings GB/T11776-1989 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Quality Standards for Grass Carp Fry and Fingerling
Standards for quality of grass carp fry and fingerling
1 Subject content and scope of application
GB/T 11776-89
This standard specifies the quality requirements and inspection methods for grass carp fry and fingerling. This standard applies to the quality identification of grass carp fry and fingerling. 2 Referenced standards
GB5055 Black carp, grass carp, silver carp, broodstock 3 Terminology
3.1 Fry: refers to the fry at the stage of disappearance of yolk sac, inflation, horizontal swimming and active feeding. 3.2 Fingerling: refers to the fry that has grown to the stage of full scales and fin rays, and has the basic characteristics of adults in appearance. 4
Source of Seedlings
Fish fry: artificially bred by broodstock that meet the requirements of GB5055 or natural fish fry caught from rivers. 4.11
4.2 Fish species: fish species cultivated in ponds or produced by other means. 5 Quality of fish fry
5.1 Appearance
5.1.1 More than 95% of the fry should meet the requirements of Article 3.1 by naked eye observation, and the fish body should be transparent, bright in color, and not black. 5.1.2 Swimming in clusters, active, slightly stirring the water in the container, more than 90% of the fry have the ability to swim against the current. 5.2 Countable and measurable indicators
5.2.1 Countable indicators: deformity rate is less than 3%; injury rate is less than 1%. 5.2.2 Measurable indicators: more than 95% of the fry should reach a total length of 0.7cm. 6 Fish quality
6.1 Appearance
6.1.1 Normal body shape, complete fins and scales. 6.1.2 Smooth body surface with mucus, normal color, active swimming. 6.2 Countable and measurable indicators
6.2.1 Countable indicators: deformity rate less than 1%; disease rate less than 1% (no individuals with harmful infectious diseases); injury rate less than 1%. 6.2.2 Measurable indicators: The weight of fish of various specifications (total length) should comply with the provisions of Table 1. Approved by the State Administration of Technical Supervision on November 6, 198944
Implemented on July 1, 1990
Total number of tails per kilogram
GB/T 11776-89
Total number of tails per kilogram
6.2.3 Standard weight of overwintering fish species: in the south, it should reach more than 90% of the values ​​listed in the table; in the north, it should reach more than 85%. 6.3 Quarantine: No individuals with hemorrhagic disease, enteritis, red skin disease, gill rot, or coccidiosis. Inspection method
Total number of tails per kilogram
Sampling: The random sampling of each batch of fry and fingerlings should be more than 100 tails; the measurement of measurable indicators of fingerlings should be more than 30 tails per batch. 7.1
Full length measurement: Use a standard measuring tool to measure the straight length from the tip of the snout to the end of the tail fin tail by tail. 7.2
Weighing: Remove the water from the fish body and weigh it.
Injury rate: Count by naked eye. www.bzxz.net
Disease: Test according to the conventional diagnostic method for fish diseases. 7.5
Additional remarks:
GB/T11776—89
This standard is proposed by the Ministry of Agriculture of the People's Republic of China. This standard is under the jurisdiction of the Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences. This standard was drafted by the Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences. The main drafters of this standard are Ge Guangying and Yu Qingming. 46
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