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A culture method for preventing Procambarus clarkii from precocious maturation

A technology of Crayfish and a breeding method, applied in the field of aquaculture, can solve the problems of lack of scientific research data, unclear real mechanism, complicated mechanism, etc., and achieves the advantages of improving economic benefits, improving survival rate, delaying ovarian development and maturation. Effect

Active Publication Date: 2018-06-26
HUAZHONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mechanism of Procambarus clarkii's precocious puberty is very complicated, and the real mechanism is not clear and has not been reported
At present, although there are reports on preventing the precocious puberty of Procambarus clarkii at home and abroad, they all stay on the basis of breeding experience or referring to the experience of preventing the precocious puberty of Chinese mitten crabs, lacking convincing scientific research data

Method used

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  • A culture method for preventing Procambarus clarkii from precocious maturation
  • A culture method for preventing Procambarus clarkii from precocious maturation
  • A culture method for preventing Procambarus clarkii from precocious maturation

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Effects of water temperature, stocking density, and ratio of fish meal and soybean meal to prevent Procambarus clarkii from precocious maturation

[0022] The settings of water temperature, breeding density, and ratio of fish meal to soybean meal in each experimental group are shown in Table 1

[0023] See Table 2 for the specific formula of the test feed with the addition ratio of fish meal and soybean meal in each experimental group. The feed is mixed evenly, and water is added until the feed can just be kneaded into a ball by hand, pressed into long strips with a noodle press, then cut into 2-3mm long sinking granules, and dried in an oven at 60°C for 8 hours. and stored sealed in a refrigerator at 4°C. The feed did not disperse within 3 hours in the test water. Dextrin is used to make up the difference.

[0024] Table 1 The situation of water temperature, breeding density, fish meal soybean meal ratio in different treatment combinations

[0025]

[0026] 1, 2...

Embodiment 2

[0031] Effects of different water temperature, stocking density and ratio of fish meal to soybean meal on the survival rate of Procambarus clarkii

[0032] The survival rate of Procambarus clarkii was different under different combinations of temperature, stocking density, and ratio of fish meal to soybean meal. According to the range analysis in Table 3, it can be found that among the three factors, factor B (stocking density) has a significant impact on the survival of Procambarus clarkii, because its range is greater than that of the control (empty column). A factor (temperature) is the second most influential factor, and C factor (fish meal: soybean meal) has the least influence, but the influence of A factor and C factor has not reached a significant level. From the analysis in Table 3, it can be found that the combination of factor levels is A 1 B 1 C 2 The survival rate is the highest, that is, A factor 1 level, B factor 1 level, and C factor 2 level, that is, the wa...

Embodiment 3

[0036] Effects of different water temperature, stocking density and ratio of fish meal to soybean meal on weight gain rate of Procambarus clarkii

[0037]The growth of Procambarus clarkii was different under different temperature, stocking density, and ratio of fish meal to soybean meal. See Table 3 for the range analysis results of Procambarus clarkii weight gain rate [(final body weight-initial body weight) / initial body weight]. It can be seen from Table 3 that the ranges of the three factors are greater than the range values ​​in the empty columns, indicating that they all have a significant impact on the weight gain rate of Procambarus clarkii. Among them, B factor (stocking density) has the largest range, indicating that it has the greatest impact on the weight gain rate of Procambarus clarkii, followed by A factor, and C factor has the smallest range value, indicating that it has the least impact. From the analysis in Table 3, it can be found that the combination of fac...

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Abstract

The present invention proposes a culture method for preventing Procambarus clarkii from being precocious. The mode is as follows: water temperature 22-28°C; culture density: 10-30 / water tank, water body volume of the water tank is 65×45×22cm3; mass in the feed Components in percentage terms: fish meal 10‑50%, soybean meal 10‑50%, corn meal 15%, wheat flour 15%, minerals 1.5%, fish oil 1.5%, vitamin C 0.04%, dextrin 6.96%. The optimal solution is 30% fish meal, 30% soybean meal, 15% corn meal, 15% wheat flour, 1.5% minerals, 1.5% fish oil, and 0.04% vitamin C. Controlling the ratio of fish meal to soybean meal can control the precocious puberty of Procambarus clarkii. The invention is simple and easy to implement, suppresses the prematurity of the shrimp, increases the unit weight of the shrimp, and has certain economic benefits.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and relates to a method for promoting the healthy culture of Procambarus clarkii (crayfish), in particular to a culture environment and nutritional factor conditions for preventing the premature maturity of the Procambarus clarkii. Background technique [0002] Procambarus clarkii (Procambarus clarkii) belongs to Arthropoda, Crustacea, Decapod, also known as red marsh crayfish, commonly known as freshwater lobster or crayfish, is an important freshwater economic shrimp. However, the crayfish raised in the market are generally precocious, that is, the gonads of female and male individuals mature in advance, which makes the nutrient supply shift from growth and development to reproductive development in advance, resulting in the small adult shrimp of Procambarus clarkii, which does not grow well. Large, which seriously reduces the quality of commercial shrimp, and there is a serious shortage of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/59A23K50/80A23K10/22A23K10/30A23K20/163A23K20/20A23K20/26A23K20/174A23K20/158
CPCY02A40/81Y02A40/818
Inventor 王玉凤谭红月邵光明
Owner HUAZHONG NORMAL UNIV
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