CN102017902A - Method for rearing prawn by utilizing chaetoceros - Google Patents

Abstract

The invention relates to the technical field of aquaculture, in particular to an environment-friendly prawn nursery method using chaetoceros. The prawn larvae are cultivated in the culture pond, and the nutrients and Chaetoceros needed for the seedlings are added in each cultivation period of the whole larvae cultivation period until the seedlings are mature; the added Chaetoceros density is maintained at 2-12 in the culture pond. Ten thousand/ml. On the basis of effectively utilizing the ecological water environment mainly composed of chaetoceros to raise prawn seedlings, the present invention realizes zero pollution to the ecological environment by only adding water and not draining water, and at the same time does not need to use any antibiotics, and truly achieves the production of shrimp seedlings green health.

Description

A method for cultivating prawn seedlings utilizing chaetoceros

technical field

The invention relates to the technical field of aquaculture, in particular to an environment-friendly prawn nursery method using chaetoceros.

Background technique

With the development of aquaculture industry, its impact on the ecological environment has attracted more and more attention. In recent years, more and more elements of environmental protection have been considered in the improvement of aquaculture technology, and technologies such as fully enclosed, circulating water, and zero sewage have been invented successively. These technologies are more engineering-based, and most of them are based on equipment renewal basis. The shrimp nursery technology that realizes environmental protection by simply utilizing the relationship between organisms and establishing a controllable and friendly ecosystem has not yet been developed.

Contents of the invention

The purpose of the present invention is to provide a practical and environment-friendly method for raising prawn seedlings using chaetoceros.

To achieve the above object, the technical solution adopted in the present invention is:

A method for cultivating prawn seedlings utilizing Chaetoceros: cultivating prawn larvae in a culture pond, adding nutrients and Chaetoceros needed for the seedlings in each cultivation period of the whole larvae cultivation period, without draining water, until the prawns are grown from nauplii The whole cultivation process to the third stage of larvae; the density of the added chaetoceros is maintained at 20,000-120,000/ml in the culture pond.

The various cultivation periods in the whole process of the larvae cultivation period are Z1, Z2, Z3 of psyllid stages; M1, M2, M3 of mysis; and P1, P2, P3 of larvae.

The Z1, Z2 and Z3 stages of psyllium larvae assist in feeding spirulina and yeast; the stages of mysis M1, M2 and M3 assist in feeding spirulina, yeast and Artemia larvae; the stages of larvae P1, P2 and P3 assist in feeding Artemia larvae and shrimp chips.

The advantages that the present invention has:

1. the cultivation environment of the seedling raising method of the present invention will effectively utilize a large amount of idle seedling raising workshop cement ponds.

2. The seedling survival rate of the method for raising seedlings of the present invention is stable and basically remains at 40%-60%.

3. The Chaetoceros adopted in the present invention has good palatability and comprehensive nutrition, and it meets the physiological and ecological requirements for the growth and development of prawn larvae.

4. The seedling raising process of the present invention does not need antibiotics, ensuring that the shrimp seedlings have no drug residues.

5. On the basis of effectively utilizing the ecological water environment mainly composed of chaetoceros to raise prawn seedlings, the present invention realizes zero pollution to the ecological environment by only adding water and not draining water, and eliminates environmental pollution. At the same time, it does not need to use any antibiotics, It has truly achieved the green and healthy production of shrimp seedlings.

Detailed ways

Example

Chlorine disinfection (available chlorine 15 mg/L) was carried out to the water in the nursery pond for cultivating prawn larvae, and after sedimentation for 48 hours, the pretreatment was completed by filtering in a sand tank.

Then use the 30 cubic meter cement pool in the nursery as the cultivation tank, inject the pretreated seawater in the nursery tank, the pretreated seawater 60cm in the nursery tank, and inflate the nursery tank with residual chlorine. Put prawn nauplii (N5-N6) (the 5th to 6th stage of development of nauplius) in the nursery pond, and the density of larvae is 150,000 tails/cubic water body. After the larvae are released, add Chaetoceros 10cm.

Add 10cm of Chaetoceros algae water when the seedlings are in the Z1 stage of the zoan larvae, so that the density of Chaetoceros in the culture tank can be maintained at 80,000-90,000/m1; the water temperature is 30°C, and a small amount of aeration is maintained. The Z1 cultivation period is 24-30 hours.

Add 10cm of Chaetoceros algae water when the seedlings are in the Z2 stage of zoea, so that the density of Chaetoceros in the culture tank can be maintained at 100,000-110,000/ml; at the same time, assist in feeding spirulina and yeast, 6 times a day, each feeding Add 3 grams of spirulina and 2 grams of yeast; the water temperature is 30°C, keep a little aeration, and the Z2 cultivation period is 24-30 hours.

Add 10cm of chaetoceros algae water when the seedlings are in the Z3 stage of zoea larvae to keep the density of chaetoceros in the culture tank at 120,000/ml; at the same time, supplementary feeding of spirulina and yeast, 6 times a day, each dosage Feed 3 grams of spirulina and 2 grams of yeast; the water temperature is 31°C, keep a small amount of aeration, and the cultivation period of Z3 is 24-30 hours.

When the seedlings are in the mysis stage M1, add 10 cm of Chaetoceros algae water to keep the density of Chaetoceros in the culture pond at 100,000-110,000/ml; at the same time, assist in feeding Artemia larvae to keep the ratio of Mysis larvae: Artemia larvae at 1: 10 or so and auxiliary feeding of spirulina and yeast, 6 times a day, 5 grams of spirulina and 5 grams of yeast per dosage; water temperature 32 ℃, maintain a moderate amount of aeration, M1 cultivation period is 24-30 hours.

When the seedlings are in the mysis stage M2, add 10 cm of Chaetoceros algae water to keep the density of Chaetoceros in the culture pond at 80,000-100,000/ml; at the same time, assist in feeding Artemia larvae to keep the ratio of Mysis larvae: Artemia larvae at 1: About 10; the water temperature is 32°C, keep a moderate amount of aeration, and the M2 cultivation period is 24-30 hours.

When the seedlings are in the mysis stage M3, add 10 cm of Chaetoceros algae water to keep the density of Chaetoceros in the culture pond at 60,000-80,000/ml; at the same time, assist in feeding Artemia larvae to keep the ratio of Mysis larvae: Artemia larvae at 1: About 10; the water temperature is 32°C, keep a moderate amount of aeration, and the cultivation period of M3 is 24-30 hours.

When the seedlings are in the larvae stage P1, add 10cm of Chaetoceros algae water to keep the density of Chaetoceros in the culture pond at 40,000-60,000/ml; at the same time, feed Artemia larvae and shrimp slices, 6 times a day, each harvest year 1 liter of worms, 100 grams of shrimp chips; the water temperature is 32°C, keep a lot of air, and the incubation period is 24 hours.

Add 10cm of Chaetoceros algae water when the seedlings are in the larvae stage P2, so that the density of Chaetoceros in the culture tank can be maintained at 30,000-50,000/ml; at the same time, feed Artemia larvae and shrimp slices, 6 times a day, each harvest year 1 liter of worms, 120 grams of shrimp chips; the water temperature is 32°C, keep a lot of air, and the incubation period is 24 hours.

When the seedlings are in the larval stage P 3, add 10 cm of Chaetoceros algae water to keep the density of Chaetoceros in the culture pond at 20,000-40,000/ml; at the same time, feed Artemia larvae and shrimp chips, 6 times a day, each time Artemia 1 liter, shrimp chips 140 grams. The water temperature is 32°C, a large amount of air is kept, and the incubation period is 24 hours.

Application example

Adopt seedling raising method of the present invention to carry out seedling cultivation in Hailing Island, Yangjiang City, Guangdong Province, and a modern chaetoceros cultivation workshop has been built here, and 80 tons of chaetoceros are cultivated on average every day. Then adopt the inventive method in the cement pond of 2880 cubic water bodies, use chaetoceros in the whole process of seedling cultivation, only add algae water, do not change water. A total of 500 million Litopenaeus vannamei shrimp larvae have been cultivated, and the average survival rate of larvae is 45%. Chaetoceros is used to cultivate larvae. The larvae grow fast, have good quality, and the shrimp larvae culture responds well.

Claims (3)

1. a method for cultivating prawn seedlings utilizing Chaetoceros, characterized in that: the prawn larvae are cultivated in the culture pond, and the nutrients and Chaetoceros needed for the seedlings are added in each cultivation period of the whole process of the larvae cultivation period, without draining, until Complete the whole cultivation process of prawns from nauplius to larvae; the density of the added chaetoceros is maintained at 20,000-120,000/ml in the culture pond. 2. the prawn seedling raising method utilizing chaetoceros according to claim 1, is characterized in that: each cultivation period of the whole process of the larvae cultivation period is zocular larvae stage Z1, Z2, Z3; mysis stage M1, M2, M3; larval stages P1, P2, P3. 3. the prawn nursery method utilizing Chaetoceros according to claim 1, is characterized in that: described zocular larval stage Z1, Z2, Z3 auxiliary feeding spirulina and yeast; mysis stage M1, M2, M3 auxiliary Spirulina, yeast and Artemia larvae were fed; P1, P2, and P3 of the larval stages were assisted in feeding Artemia larvae and shrimp chips.