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Long-term safe breeding method for lateolabrax japonicus juvenile fish

A breeding method and technology of sea bass, which can be used in fish farming, application, climate change adaptation, etc., and can solve problems such as the lack of clear conclusions about population division

Inactive Publication Date: 2018-11-20
OCEAN UNIV OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Some scholars believe that there are southern and northern populations of sea bass in my country. The southern population mainly includes the coastal population of the South China Sea and the Beihai population of Guangxi, while the northern population of sea bass includes the coastal populations of the Yellow Sea and the Bohai Sea and the coastal population of the East China Sea. At present, isozymes and RAPD molecular methods have been used to It confirmed the theory of "the differentiation of the two populations of the northern and southern perch", but there is no clear conclusion on the specific population division. This study provides practical production guidance for the division of the southern and northern populations of the perch based on the difference in the ability to resist salt and alkali.

Method used

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  • Long-term safe breeding method for lateolabrax japonicus juvenile fish
  • Long-term safe breeding method for lateolabrax japonicus juvenile fish
  • Long-term safe breeding method for lateolabrax japonicus juvenile fish

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1: Determination of alkalinity tolerance range and safe breeding alkalinity of early juvenile perch:

[0014] 1 Materials and methods

[0015] 1.1 Experimental objects

[0016] The experiment was completed from late March 2018 to late May of the same year. The juvenile perch used in the experiment and the experimental site were provided by Dongying Lijin County Shuangying Aquatic Seed Co., Ltd. The fish used in the experiment were self-propagating commercial juvenile perch in the north and commercial juvenile perch purchased in the south. Before the experiment, the juvenile fish were healthy and fed normally. 1.2 Experimental steps

[0017] In this experiment, four alkalinity groups were designed, namely, alkalinity 10, 15, 20, and 30, and the freshwater and seawater groups were used as the corresponding control groups. Group fish body, other groups of fish body is the southern fish body, and there are 8 treatment groups in the experiment. The culture conta...

Embodiment 2

[0031] Embodiment 2: the technical method of distinguishing the southern and northern populations of perch

[0032] 1 Materials and methods

[0033] 1.1 Experimental objects

[0034] The selected experimental object is the same as in Example 1.

[0035] 1.2 Experimental steps

[0036] The long-term breeding experiment is the same as in Example 1.

[0037] South and North alkalinity 20 groups were cultured at alkalinity 20 for 10 days, and 50 fish bodies were selected from each group, and transferred to the freshwater group for recovery culture experiments. Two replicates were set for each treatment group. After 45 days of recovery in fresh water, the average body weight was weighed.

[0038] 1.3 Data analysis

[0039] 2 results

[0040] All experimental data processing and analysis are the same as in Example 1.

[0041] 2.1 The effect of alkalinity on the body weight of the southern and northern juvenile perch

[0042] The average body weight of the southern alkalinity...

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Abstract

The invention discloses a long-term safe breeding method for lateolabrax japonicus juvenile fish. Initial lateolabrax japonicus juvenile fish bodies with the mass of 14.11+ / -0.45 g in the early stageare selected, and the safe alkalinity of long-term breeding is 10 mmol / L. The method has the advantages that the setting of the safe alkalinity of the lateolabrax japonicus juvenile fish is firstly opened to the public according to the long-term breeding experimental result, the alkalinity is 10 mmol / L, early alkalinity adaptation can enhance the higher alkalinitytolerance of the lateolabrax japonicus juvenile fish, in actual production, data support is provided for the dividing of south and north groups of lateolabrax japonicas, and technical support is provided for salt and alkali water areapopularization and geographical population identification of early lateolabrax japonicas fry.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and relates to a technical method for determining the safe alkalinity of juvenile perch for long-term cultivation and for distinguishing its south and north groups. Background technique [0002] Lateolabrax maculatus belongs to Perciformes, Serranidae, and Lateolabrax. It is one of the marine fish species with the highest aquaculture output in my country, with an annual output of more than 10×10 4 t. The northern coast of my country has broken through the technical difficulties of artificial breeding of sea bass, which has increased the supply of seedlings of sea bass in the northern region. The northern "Libei flower perch" species has been successfully cultivated in the saline-alkali waters of Dongying City and the northern inland saline-alkali waters. The ecological environment of the water area provides new opportunities. Most of the studies on the salt-alkaline resistance of sea bass ...

Claims

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Application Information

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IPC IPC(8): A01K61/10
CPCA01K61/10Y02A40/81
Inventor 温海深刘阳王旭李昀徐扬涛陈守温
Owner OCEAN UNIV OF CHINA
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