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Low-salinity cultivating method for siniperca scherzeri steindachner fries

A cultivation method and low-salinity technology, applied in the field of aquaculture, can solve the problems of easy disease and death of fry, large and high-quality freshwater resources, vertical infection of bacteria, etc., and achieve the effect of easy promotion, saving clean freshwater resources, and reducing disease infection.

Inactive Publication Date: 2015-03-18
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the production and cultivation of mandarin fish seedlings are all carried out in a freshwater environment, and there are the following problems: ① artificial breeding and cultivation are carried out in a freshwater environment, which may easily lead to vertical infection of many germs, and fish fry are prone to disease and death
②Mandarin mandarin fish is a typical carnivorous ferocious fish. It feeds on live fish and shrimp all its life. The seed bait is mainly Artemia larvae and bait fish. The cost of bait fish is high, and Artemia larvae cannot develop in pure fresh water. Generally, 2- It will die within 3 hours, and the mandarin fish will not eat the dead artemia, which will cause waste of bait, and will also damage the water quality
③The water needs to be changed frequently during seed production, which consumes a lot of high-quality fresh water resources

Method used

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  • Low-salinity cultivating method for siniperca scherzeri steindachner fries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Implementation location: In the hatching shed of Dabao Fishery, Fengcheng City, Liaoning Province, the steps are as follows:

[0027] 1) Sources of fish fry and bait: Yalu River spotted mandarin fish fry are 5-day-old healthy fry after self-propagation and membrane rupture; bait fish bream fry are all 3-day-old healthy fry after self-propagation and membrane rupture; Artemia larvae are purchased from harvest years Eggs hatch.

[0028] 2) The aquarium (150cm×55cm×50cm) was disinfected with 10mg / L potassium permanganate solution before the test, rinsed, and then filled with fresh water.

[0029] 3) Release seedlings: choose healthy and uninjured spotted mandarin water flowers (1cm), and release 100 seedlings in each aquarium.

[0030] 4) Salinity adjustment: On the day of seedling release, gradually add natural brackish water (salinity greater than 5‰) to increase the salinity, and increase the salinity of the water body by 1‰ every day until the salinity reaches 5‰.

...

Embodiment 2

[0034] The method is the same as in Example 1, except that the salinity in the water is increased by 1‰ every day until the salinity reaches 10‰.

[0035] After 15 days of cultivation, the growth results of the spotted mandarin fish are shown in Table 1:

[0036]

[0037] Different letters represent significant differences, P<0.05.

[0038] It can be seen from the above results that if the salinity is increased by 1‰ every day, and the salinity is adjusted to 5‰, the growth of the spotted mandarin fish seedlings is the best, and the body weight and survival rate are the highest.

[0039] Use the Trizol method to extract the total RNA of the whole fish in Comparative Example and Examples 1 and 2, and use cDNA as a template after reverse transcription to analyze the expression of growth and metabolism-related genes by quantitative PCR. The relevant results are shown in the appendix Figure 1-6 . The gene expression pattern reflects the physiological state and regulation mec...

Embodiment 3

[0041] Implementation location: In the hatching shed of Dabao Fishing Farm, Fengcheng City, Liaoning Province, the experimental steps include:

[0042] 1) Sources of fish fry and bait: Yalu River spotted mandarin fish fry are 5-day-old healthy fry after self-propagation and membrane rupture; bait fish bream fry are all 3-day-old healthy fry after self-propagation and membrane rupture; Artemia larvae are purchased from harvest years Eggs hatch.

[0043] 2) The aquarium (150cm×55cm×50cm) was disinfected with 10mg / L potassium permanganate solution before the test, rinsed, and then filled with fresh water.

[0044] 3) Release seedlings: choose healthy and uninjured spotted mandarin water flowers (1cm), and release 100 seedlings in each aquarium.

[0045] 4) Salinity adjustment: On the day of seedling release, salt is gradually added to increase the salinity, and the salinity of the water body is increased by 1‰ every day until the salinity reaches 5‰.

[0046] 5) Feed feeding: D...

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Abstract

The invention belongs to technical field of aquaculture, and particularly discloses a low-salinity cultivating method for siniperca scherzeri steindachner fries. The method comprises the following steps: adjusting the salinity of a siniperca scherzeri steindachner fry cultivating water body; increasing the salinity of the water body by 0.05-0.2 percent every day till the salinity is up to 0.3-0.6 percent; feeding baits once in the morning and at the night every day; controlling the water temperature at 25+ / -1 DEG C and the pH value at 7.0-7.5 and keeping the dissolved oxygen in water more than or equal to 8mg / L, wherein the baits are young fairy shrimps which are fed in the amount of 3-7 pieces per milliliter and megalobrama amblycephala fries which are fed in the amount of 4-8 times that of the quantity of siniperca scherzeri steindachner fries. According to the method, the disease infection during a fry production period can be lowered, the survival rate of fry cultivation is increased, the death rate of the young fairy shrimps is lowered, and the utilization ratio of the baits is increased; the method has the characteristics of easiness and convenience in operating, easiness in popularizing, and the like.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to a low-salinity cultivation method for mandarin fish seedlings. Background technique [0002] Mandarin fish is a traditional carnivorous fish in my country. It has no intermuscular spines, plump and tender meat, delicious taste and high nutritional value. Among them, Siniperca scherzeri Steindachner, known as "freshwater grouper", is deeply loved by consumers and is one of my country's important freshwater export fishes. The spotted mandarin fish belongs to the subfamily Siniidae of the order Perciformes, and is a unique fish in East Asia. In my country, it is distributed in the Liaohe, Hunhe, Biliu, and Yalu River systems, as well as in the Yangtze River to the Pearl River south of the Yellow River. [0003] At present, the production and cultivation of mandarin fish seedlings are all carried out in a freshwater environment, and there are the following problems: ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 梁旭方周怡袁小琛李艾璇易提林何珊袁勇超
Owner HUAZHONG AGRI UNIV
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