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Method for culturing oncorhynchus keta in fresh water

A technology for salmon and freshwater aquaculture, applied in fish farming, application, climate change adaptation and other directions, can solve the problems of unstable salmon production and short artificial cultivation time, etc.

Inactive Publication Date: 2016-10-19
高云
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this marine grazing multiplication technology generally takes no more than 6 months to cultivate juvenile salmon in fresh water, and the artificial cultivation time is relatively short. Most of the time is naturally grown in the ocean, which is greatly affected by the natural climate environment. Salmon production is erratic

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0006] Specific implementation mode one: put the juvenile salmon into an area of ​​50m 2 , in a fish pond with a water depth of 0.4-0.6m, stock 300-500 fish per square meter, the water source is underground spring water or groundwater, adopt disposable running water or circulating water for farming, and the water temperature is 6-20°C, use increased water flow or air pump The dissolved oxygen concentration of the water is at least 7mg / l, the pH value of the water body is at 6-7, and the water quality index meets the growth requirements; the salmon artificial pellet feed is fed with protein content of 38%-48% (weight), and the fat content is at least 15% (weight), the daily feeding amount is calculated according to 3-5% of the fish weight, and the daily feeding is 2-4 times; when the weight of salmon grows to 40-60g / tail, increase the area of ​​the fish pond to 100m 2 , the water depth is increased to 0.8-1m, and the breeding density is 100-200 fish / m 2 ; When the fish weight ...

specific Embodiment approach 2

[0007] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the salmon artificial feed consists of 50%-60% fish meal, 15%-20% shrimp meal, 10%-15% soybean and 10%- Composition of 20% additives; wherein the additives are composed of wheat flour, vitamins, choline chloride, calcium pantothenate, metal elements, refined fish oil and complex enzymes, and the others are the same as in the first embodiment.

[0008] The proportional relationship among the components in the additives of this embodiment can be adjusted according to the breeding conditions.

specific Embodiment approach 3

[0009] Specific embodiment three: the difference between this embodiment and specific embodiment one is that the water in the cultured fish pond is fresh water, salinity≤2‰, and other is identical with specific embodiment one.

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Abstract

Provided is a method for culturing oncorhynchus keta in fresh water. An objective is to solve a problem that at present, from young fishes to adult fishes of oncorhynchus keta must survive or be cultured in saline water. The method is used to culture young fishes to adult oncorhynchus keta in fresh water, and water temperature is 6-10 DEG C, oxygen concentration in water is at least 7 mg / L, and pH value of water is 6-7. The method comprises: feeding oncorhynchus keta artificial pellet feed; young fish culture density being 300-500 / m<2>, culture water depth being 0.4-0.6 m; when weight of a fish body increases to 40-60 g, water depth increasing to 0.8-1 m; when weight of a fish body increases to 150 g, water depth increasing to 1-1.2 m. The method is used to culture autumn oncorhynchus keta, and survival rate from oncorhynchus keta young fishes to large marketable fishes is above 75%, reaching requirement of cultivation in batches.

Description

technical field [0001] The invention relates to a method for cultivating salmon. Background technique [0002] Salmon (Oncorhynchus keta) is a kind of cold-water fish that lays eggs and hatches in fresh water, grows in sea water, and migrates to fresh water to lay eggs when sexually mature. It is one of the world's rare fish. The migratory process of salmon is as follows: juvenile fish swim from the place of birth down the river to the estuary into the deep sea, and the salinity of the living water gradually increases. Gradually decreasing, this is upstream. In order to protect and utilize salmon resources and increase the number of migratory populations, my country adopts the technology of artificial breeding and release of salmon (artificial breeding process is mainly to breed young fish on a large scale, and then put them into river waters with suitable ecological environment conditions, and the juvenile fish are dropped into the sea. growth, forming an artificially mult...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 高云
Owner 高云
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