This standard specifies the quality requirements and inspection methods for bighead carp (Aristichthys nobilis) fry and fingerlings. This standard applies to the quality identification of bighead carp fry and fingerlings. GB/T 11778-1989 Bighead carp fry and fingerlings quality standard GB/T11778-1989 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Quality Standards for Bighead Carpfry and Fingerling
Standards for quality of bighead carpfry and fingerling
1 Subject content and scope of application
This standard specifies the quality requirements and inspection methods for bighead carp fry and fingerling. This standard applies to the quality identification of bighead carp fry and fingerling. 2 Reference standards
GB5055 Black carp, grass carp, chain carp, fish broodstock 3 Terminology
3.1 Fry: refers to the fry at the stage of disappearance of yolk sac, inflation, horizontal swimming and active feeding. GB/T 11778—89
3.2 Fingerling: refers to the fry that has grown and developed to the stage of full scales and fins, and has the basic characteristics of adults in appearance. 4 Source of fry
4.1 Fry: artificial breeding of broodstock that meets the requirements of GB5055 or natural fry caught in rivers. 4.2 Fish species: fish species cultivated in ponds or produced by other means. 5 Quality of 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 groups, active, and 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 less than 3%; injury rate less than 1%. 5.2.2, measurable indicators: more than 95% of the fry should reach a total length of 0.9cm. 6 Quality of fish species
6.1 Appearance
6.1.1 Normal body shape; fins and scales are complete. 6.1.2 The body surface is smooth and has mucus, the color is normal, and the swimming is active. 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) shall comply with the provisions of Table 1. Approved by the State Bureau of Technical Supervision on November 6, 198950
Implementation on July 1, 1990
Total number of tails per kilogram
GB/T 11778--89
Total number of tails per kilogram
Standard weight of wintering fish: in the south, it should reach more than 90% of the values ​​in the table; in the north, it should reach more than 85%. 6. 2. 3bzxz.net
6.3 Quarantine; no individuals with hemorrhagic disease, enteritis, red skin disease, gill rot, and coccidiosis. Test method
Total number per kilogram
7.1 Sampling: Random sampling of each batch of fry and fingerlings should be more than 100; the measurement of measurable indexes of fingerlings should be more than 30 per batch. 7.2 Full length measurement: Use standard measuring tools to measure the straight length from the tip of the snout to the end of the tail fin for each fish. 7.3 Weighing: Absorb the water from the fish body and weigh it. 51
Injury rate: Count by naked eye observation.
7.5 Disease: Temporarily test according to the conventional diagnostic method for fish diseases. Additional remarks:
GB/T 11778-
This standard was 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. 52
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