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Glutinous egg and fry hatching method

A technology of sticky eggs and fry, which is applied in the field of fish farming, can solve problems affecting broodstock spawning activities, hatching rate and survival rate of seedlings, low yield of fry in a single pond, low density of fish eggs, etc., and achieves convenient operation, simple process, The effect of high bonding strength

Inactive Publication Date: 2005-03-16
TIANJIN AGRICULTURE COLLEGE
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AI Technical Summary

Problems solved by technology

[0002]At present, the traditional hatching method is generally adopted for fish breeding and hatching, that is, aphrodisiac and spawning are carried out outdoors, and eggs are naturally laid on palm chips and hatched in a ring. The hatching method is greatly affected by the external water source and climate. Once the climate is abnormal, such as cold current, it can seriously affect the spawning activity, hatching rate and survival rate of broodstock.
The biggest disadvantage of this fry hatching method is the low density of fish eggs naturally spawned on palm chips, and the low yield of fry in a single pond
There are great restrictions on the planned commercial seedling breeding, which has become a key link restricting the production of fry

Method used

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Embodiment 1

[0030] Sticky egg fry hatching method, including broodstock culture, induced spawning, insemination and hatching process:

[0031] 1. Breeding of broodstock

[0032] Broodstock selection is carried out before overwintering in autumn, and broodstock with standard traits and good development are put into early breeding ponds. In the early second year, when the water temperature is above 9°C, it starts to be fed. The main feed is corn dregs and malt. The initial feeding amount accounts for 0.2% of the fish body weight, and the feeding amount is increased as the water temperature increases. When the water temperature stabilizes above 17°C, start to flush and inflate regularly. Stop feeding one week before induction of labor, and flush every day, and the flushing time is gradually increased from 1 hour to 3 hours. When the water temperature stabilizes above 18°C, broodstock carp and crucian carp can be selected for induced labor.

[0033] 2. induced labor

[0034] (1) Determin...

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Abstract

The invention discloses a process for hatching glutinous gamogenetic egg fish fry comprising the steps of parent fish culturing, birth facilitating, semination and incubation, which is characterized in that the fertilized ovum is spread onto the net sheets on the ovum spreading pond, after the fertilized ovum is fixed on the net sheets, it is charged into incubation pool for hatching. The invention can result in higher adhesive strength for the fertilized ovum.

Description

technical field [0001] The invention belongs to the technical field of fish culture, in particular to a method for hatching sticky egg fry. Background technique [0002] At present, fish breeding and hatching generally adopt the traditional hatching method, that is, aphrodisiac and spawning are carried out outdoors, and eggs are naturally laid on palm chips, and hatched in a ring. This hatching method is greatly affected by external water sources and climate. Once the climate is abnormal, Such as cold currents, etc., can seriously affect the spawning activities, hatching rate and survival rate of broodstock. The biggest disadvantage of this fry hatching method is that the density of fish eggs naturally spawned on the palm sheet is low, and the yield of fry in a single pond is low. Produce very big restriction to carrying out commercial seedling raising in a planned way, become the key link that restricts fry production. Contents of the invention [0003] The invention pr...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 邢克智蔡中华陈成勋郭永军刘茂春马敬福
Owner TIANJIN AGRICULTURE COLLEGE
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