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GB/T 32758-2016: Counting methods for sea fish egg and fry
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GB/T 32758-2016: Counting methods for sea fish egg and fry

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Counting methods for sea fish egg and fry ICS 65.150 B51 National Standards of People's Republic of China Seawater fish eggs, seed count method 2016-06-14 release 2017-01-01 Implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released

Foreword

This standard is drafted in accordance with the rules given in GB/T 1.1-2009. Please note that some of the contents of this document may involve patents. The release of this document The Agency does not assume responsibility for identifying these patents. This standard is proposed by the Ministry of Agriculture of the People's Republic of China. This standard is under the jurisdiction of the National Aquatic Standardization Technical Committee (SAT/TC156). The drafting of this standard. the Chinese Academy of Fishery Sciences Huanghai Fisheries Research Institute, Weihai City, Central Pacific Ocean and Fishery Research Institute. The main drafters of this standard. Zhang Yan, Pantene, Zhang Hui, Liu Qi, Zhang Yu, the original Yong party, Xiao Yongshuang, Ma Shuang. Seawater fish eggs, seed count method

1 Scope

This standard specifies the method for counting fish and eggs in marine fish. This standard applies to marine fish fish eggs, seed count.

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article Pieces. For undated references, the latest edition (including all modifications) applies to this document. Technical requirements for viscous hatching of viscous eggs

3 egg count method

3.1 non-sticky egg counting method 3.1.1 weight counting method Weigh a certain amount of eggs, calculate the number of units per unit of fish eggs, repeat 3 times, take the average as the unit weight of the average number of eggs (n), graded the total number of fish eggs m, the total number of eggs according to formula (1). N = n × m (1) Where. N - the total number of eggs, the unit is the grain; n - the average number of eggs per unit mass, in grains per gram (grain/g); m - the quality of all the eggs, in grams (g). 3.1.2 capacity counting method Collection of floating eggs, with 5mL scale cup sampling, the number of sampled eggs is generally not less than 1mL, the number of eggs counted, repeat 3 times, taking the average number of eggs as the unit size of the average number of eggs n. With the container volume of the total volume of eggs, V, the total number of eggs according to formula (2) Calculate. N = n × V (2) Where. N - the total number of eggs, the unit is the grain; n - the average number of eggs per unit volume, in milligrams per milliliter (grain/mL); V - the volume of all the eggs, in milliliters (mL). This method is applicable to the counting of floating eggs, and this method should be used to prevent changes in the density of fish eggs caused by uneven water absorption. 3.2 Sticky egg counting method 3.2.1 low viscosity of the eggs, in the artificial insemination when the container can prevent the eggs stick each other together, the egg count with 3.1, large sticky The eggs are decontaminated and then counted, and the eggs are peeled off see SC/T 1013. ...