Fry bait biological purification and nutrient enrichment device and method

A technology of bait organisms and nutrient enhancement, applied in fish farming, climate change adaptation, application, etc., can solve the problems of no obvious effect, no measures taken to remove bacteria, no nutrient enhancement of copepods and cladocerans, etc., to achieve Improve the survival rate and growth rate, avoid diseases or malnutrition, and the effect of simple structure

Pending Publication Date: 2021-01-15
GUANGDONG OCEAN UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the fry disease caused by fry bait uncleanness and the solution research of death are less, the bait biological copepods and cladocera of fry are only soaked and sterilized with 50ppm PVP-I for 20 minutes before feeding, to remove Bacteria and viruses on the surface of copepods and cladocerans, but it has not taken any measures to remove a large number of bacteria in copepods and cladocerans, nor has it carried out nutritional enhancement on copepods and cladocerans, so the current treatment method No noticeable effect in production

Method used

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  • Fry bait biological purification and nutrient enrichment device and method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0039]Example 1 Fry bait biological purification and nutrition enhancement device

[0040]Referencefigure 1, The present invention provides a device for biological purification and nutritional enhancement of fish fry bait. The specific structure is as follows:

[0041]The fry bait biological purification and nutrition enhancement device includes a bottomless net cage 1, an aeration device 2, a water flow device 3, the aeration device 2 can be inflated in the bottomless net cage 1, the flow water device 3 can be The water outside the box 1 is pumped into the bottomless net box 1.

[0042]The bottomless net cage 1 includes a floating frame 11, a bottomless net bag 12, and a lead sinker 13. One end of the bottomless net bag 12 is fixed on the floating frame 11, and a lead sinker 13 is arranged on the edge of the other end.

[0043]The inflator 2 includes an air pump 21, an inflatable tube 22, and an inflatable stone 23. One end of the inflatable tube 22 is connected to the air pump 21 and the othe...

Embodiment 2

[0046]Example 2 Method for biological purification and nutritional enhancement of fish fry bait

[0047]This embodiment provides a method for biological purification and nutritional enhancement of fish fry bait, which specifically includes the following steps:

[0048](1) The device described in Example 1 is placed in a nursery pond, the floating frame 11 is floating on the water, the plumb 13 sinks at the bottom of the pond, and the bottomless mesh bag 12 between the floating frame 11 and the plumb 13 is enclosed Enclosed space

[0049](2) Turn on the aeration device 2 to continuously inflate the aerated stone 23, and at the same time turn on the water flow device 3 to pump the pond water containing the monocysts outside the bottomless cage 1 into the bottomless cage 1 with a water pump 31;

[0050](3) Put the purchased copepods and cladocerans in the bottomless cage 1 of the device described in step (1), and cultivate them for more than 4 hours. The feces in the intestines and stomachs of cop...

Embodiment 3

[0052]Example 3 Application of the method of biological purification and nutrition fortification of fish fry bait

[0053]Leizhou Chenhui Aquaculture Co., Ltd. used the present invention to conduct 2 batches of artificial breeding experiments of pearl gentian grouper at the breeding base of Jijia Town, Leizhou City from April to June 2020. Pond conditions: 4 ponds, 3.5-4 acres / each, all covered with plastic film; water depth 1.3-1.8 meters; seawater salinity 32-34‰. Nursery process and management: Pond water, apply organic fertilizer and water to cultivate monocytic algae and rotifers, copepods and cladocerans; set up a hatching bag in the pond and put fish eggs for incubation, when the stomach is formed 2 days after hatching. "Open the bag" release the fry from the hatching bag into the pond nursery water; within 7-8 days after opening the bag, the fry will eat the rotifers, copepods and cladocerans that naturally reproduce in the pond; 7-8 days later, the fry need to be fed when they...

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Abstract

The invention discloses a fry bait biological purification and nutrient enrichment method. The fry bait biological purification and nutrient enrichment device which is simple in structure and low in cost is firstly manufactured and comprises a bottomless net cage, an inflation device and a water flowing device. Fry bait organisms purchased are cultured for more than 4 hours by utilizing the deviceunder running water and inflation conditions, so that a large amount of organic particles, bacteria and excrement ingested by the bait organisms in an original culture pond can be fully discharged out of bodies for purification. Meanwhile, pond water containing unicellular algae outside the bottomless net cage is pumped into the net cage through a water pump, the fry bait organisms eat the unicellular algae, and nutrients such as unsaturated fatty acid in the bait organisms are enriched. The treated bait organisms are used for feeding fry, so that diseases or malnutrition caused by the fact that the fry eats bait which is unclean or lack of unsaturated fatty acid is avoided, and the survival rate and the growth speed of the fry are increased.

Description

Technical field[0001]The invention belongs to the technical field of sea fish breeding. More specifically, it relates to a device and method for biological purification and nutritional enhancement of fish fry bait.Background technique[0002]The use of outdoor mulching ponds to carry out ecological nursery is a seawater fish nursery model developed in recent years. The principle of nursery is to propagate the basic bait monocysts in outdoor ponds, and the fish fry bait organisms copepods and cladocerans in the water body utilize monocysts To reproduce, the fry feed on copepods and cladocerans. The copepods and cladocerans naturally propagated in ponds cannot satisfy the feeding of the fry. It is necessary to buy artificially cultivated copepods and cladocerans to feed the fry. However, the artificial culture of copepods and cladocerans in the industry is to apply a large amount of chicken manure and other organic fertilizers in the pond to make the water contain a lot of organic parti...

Claims

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Application Information

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IPC IPC(8): A01K61/60A01K61/80
CPCA01K61/60A01K61/80Y02A40/81
Inventor 刘永张春芳罗杰
Owner GUANGDONG OCEAN UNIVERSITY
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