This standard provides the main morphological and structural characteristics, growth and reproduction, genetic characteristics and detection methods of Channa argus (Cantor). This standard is applicable to the germplasm monitoring of Channa argus. SC/T 1052-2002 Channa argusSC/T1052-2002 Standard download decompression password: www.bzxz.net

1Cs 67.120. 30
Aquatic Industry Standard of the People's Republic of China
SC/T1052—2002
Chinese snakehead
Issued on November 5, 2002
Implementation on December 20, 2002
Ministry of Agriculture of the People's Republic of China
Chapter 4 and Chapter 6 of this standard are mandatory provisions, and the rest are recommended provisions. Appendices A and B of this standard are both informative appendices. This standard was proposed by the Fisheries Bureau of the Ministry of Agriculture
This standard is under the jurisdiction of the Freshwater Aquaculture Sub-Technical Committee of the National Technical Committee for Aquatic Products Standardization: Drafting unit of this standard: College of Fisheries, Huazhong Agricultural University Main drafters of this standard: Xie Congxin, Ma Taowu, Xiong Chuanxi, Zhou Jie. SC/T10522002
1 Scope
SC/T 10522002
This standard gives the main morphological and structural characteristics, growth and reproduction, genetic characteristics and detection methods of Channa argus (Canior):
This standard is applicable to the germplasm monitoring of Channa argus.
2 Normative references
The clauses in the following documents become the clauses of this standard through the use of the number of this standard. For any dated reference document, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, all parties that reach an agreement based on this standard are encouraged to study whether the latest version of these documents can be used: For any undated reference document, its latest version is applicable to this standard. SC 1037--2000
3 Name and classification
3.1 Scientific name
Channu argu (Cantor).
3.2 Classification position
Perriformea, family Channidac, genus Channa, 4 Main morphological and structural characteristics
4.1 External morphological characteristics
4.1.1 Appearance
The body is elongated and cylindrical, with the tail laterally flattened. The head is pointed and flat, with the top of the face, gill cover bones, trunk and body covered with scales. The mouth is large and terminal, with oblique mouth cleft extending behind the eye, and the lower forehead is protruding. There are sharp and fine teeth on the upper and lower jaws, bones and jaws. The bases of the dorsal and anal fins are very long, extending to the base of the caudal fin. The base of the fin is located in front and above the base of the pelvic fin. The pectoral fin is rounded and ends at the middle of the abdomen. The caudal fin is rounded, with many irregular black spots on the sides of the body, two longitudinal black stripes on the sides of the head, and black spots on the base of the pectoral scales. The external morphology of the blackfin is shown in Figure 1.
Figure 1 Appearance of the blackfin
4.1.2 Countable traits
4.1.2.1 Dorsal fin style
The dorsal fin style is 1.0-47~51.
4. 1.2.2 Anal fin style
SC/T1052—2002
The anal fin style is A.0-3133.
4.1.2.3 Lateral line scales
116~22-66
Scale type is 61
4.1.2.4 Number of gills on the outer side of the first gill arch
Gills on the outer side of the first gill arch are 1013
4.1.3 Measurable traits
Body length is 5.0~5.8 times of height, 3.0~3.3 times of head length, 13.5~15.8 times of caudal peduncle length, and 10.5~12.1 times of caudal peduncle height. Head length is 4.7~5.9 times of snout length, 6.2~9.1 times of eye diameter, and 5.2~6.3 times of interocular distance.
4.2 Internal structural characteristics
No pygidial tube, slender. The rear part is divided into two branches, which extend symmetrically backward into the tail muscles. 4.2.2 Vertebrae
Total number of vertebrae: 57~58.
4.2.3 Sac
2.
4.2.4 Peritoneum
5 Growth and reproduction
5.1 Growth
The measured average body length and measured average weight of fish in different age groups are shown in the table above. Table 1 The measured average body length and measured average weight of fish in different age groups Age/age
20.913. 3
27.2±2.7
32.2±2.8
31.3±5.8
37.6±3.2
37.6±3.5
45. 1±3. 3
45.4±3.2wwW.bzxz.Net
51. 1± 3. 2
52. 4±4. 314. 1
135.5+46.3440.4±105.9713.4182.21262.4±262.41825.$+4$1.2125.8±463.93 023.3=488.4122.5±59.7437.3±150.2728.2—195.51295.3±249.511 961.4276.0 2 660.0±657.22 896.3346. 8130.0±52.0439.0±128.1720.3-158.31277.2+255.0 Note: The text is the average standard reading of the mixed sample of female and male fish. The growth equation and the relationship between body length and rest weight of the black fish can be found in Appendix A. 5.2 Reproduction
5-2.1 Age of maturity
921.1=376.9 2 368.61598.52 938.7-372.4 In the south of the Yangtze River, the maturity age of female and male fish is 2 years old, and in the north of the Yangtze River, the maturity age of female blood is 3 years old, and the maturity age of fish is 2 years old.
5.2.2 Spawning type
lays floating eggs. The gonads of sexually mature individuals mature once a year and they lay eggs in batches. 5.2.3 Egg carrying capacity
The egg carrying capacity of fish in each age group is shown in Table 2,
Age/age
Absolute egg carrying capacity/grain
Relative egg carrying capacity/
(grain/g body weight)
Variation range
Variation range
Note: +8 is the mean value ± standard error,
Table 2 Individual egg carrying capacity of fish in different age groups
6 781--24 480
1408914208
22. 43-- 61. 05
38.6±10. 6
For the relationship between body length, body weight and egg carrying capacity, please see Appendix B. 6 Genetic characteristics
6.1 Cytogenetic characteristics
13 080--32 007
19758±5261
21. 76~-59. 31
37-5±10.5
SC/T1052—2002
16 940-~27 598
24470+4933
10. 59--37.55
25.0±7.7
Somatic cell chromosome number: 2m=48, chromosome number (VF): 52; genotype formula: 4sm+44st. The karyotype of Wu is shown in Figure 2.
6.2 Biochemical genetic characteristics
The karyotype of Wu double chromosomes
21 538~47 359
29 8059 108
9.16--25,21
The electrophoresis enzyme spectrum of lactate dehydrogenase (LDH) in kidney tissue of black crocodile is shown in Figure 3. The enzyme band tracing is shown in Figure 4, and the relative mobility and activity intensity of the enzyme band are shown in Table 3.
Relative mobility and activity intensity of lactate dehydrogenase enzyme band in black kidney tissue Table 3
Relative mobility
Activity intensity
SC/T1052——2002
Electrophoresis enzyme spectrum pattern of lactate dehydrogenase in kidney tissue of black crocodile HaT
Figure 4 Scanning of lactate dehydrogenase enzyme band in kidney tissue Figure 7 Detection method
1 Identification of age
According to the provisions of 7.1 of SC10372000.
2 Determination of fertility
According to the provisions of 7.21 of SC, 10372000. The detection of chromosome 3
is in accordance with the provisions of 7.3 of SC1037-2000.
Lactate dehydrogenase isozyme spectrum
The sample is kidney tissue, and the rest is in accordance with 7.4 of the provisions of SC/T 1052-2002
SC/T1052—2002
A.1 Body length and weight growth equation
Calculate according to formula (A.1) and formula (A.2):
Where:
Appendix A
(Informative Appendix)
Growth equation and relationship between body length and weight
L, 77. 3L1 — c- 18 s(r-0. 05 **-W, - 7 4071 -- e-0 198 e0+0 ee 373.16 2L.—Body length of fish at age t, in centimeters (cm); W
Body weight of fish at age t, in grams ():
e——base of natural logarithm;
t—age of a fish, in years.
A.2 Relationship between body length and weight
Calculated according to formula (A.3):
W- 0.007991 La.102
Body length of fish, in centimeters (cm).
Appendix B
(Informative Appendix)
Relationship between body length, weight and egg carrying capacity
B.1 Relationship between body length and egg carrying capacity
Calculated according to formula (B.1):
35. 474 0L -744 1
Wu Zhong:
F is the egg-carrying capacity of fish in grains;
is the body length of a fish in centimeters (cm). R.2 The relationship between body weight and egg-carrying capacity
is calculated according to formula (B.2):
F-947.2850Wo.453s
W—the body weight of the fish in grams ().
..(B.2)
SC/T1052-2002
Aquatic Products
Industry Standard of the People's Republic of China
SC/T10522002
Published by China Standards Press
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Printed by Qin Zhuofang, China Standard Press) Distributed by Beijing Distribution Office of Xinhua Bookstore, sold by Xinhua Bookstore, printed sheets 3/4 Number of words 137 words
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