Nursery conditions
Refer to general aquaculture animal breeding conditions.
Nursery process
Acquisition and storage of pro-ginseng → Artificial oxytocin and insemination → Fertilized egg hatching and larvae breeding → Cultivation management (Control of reasonable cultivation density, water change and water quality management, appropriate food and feeding, and production and release of adhering devices) → Nursing.
Bait
The larvae should be fed with feed after they are selected into the pool. Feeding adequate and appropriate feed is a prerequisite for the normal growth, development and smooth metamorphosis of the larvae. Appropriate diets include D. salina, Zhanjiang fork algae, Chaetoceros muelleri, Phaeodactylum tricornutum, and Nitzschia closteria. Using the above-mentioned bait single or mixed feeding can obtain better breeding effect. However, it is better to use 2-3 kinds of bait for mixed feeding, and the mixed feeding of bait can make their nutrition complementary to meet the nutritional needs of larvae. The first 3 days of feeding amount can be 15,000-2.0 million cells/ml and then fed at 30 000 cells/ml. If there is not enough feed, 0.5 ppm of yeast extract can be added. Although Platycladi, Heterodendron, etc. have a certain bait effect, it is not suitable as a bait for the larvae of stichopus. When the larvae metamorphose into larval larvae, in order to make full use of the water body, increase the area of ​​attachment, and change its feeding habits, proper attachment equipment should be put in place at this time. The benthic diatoms were inoculated on the corrugated plate attachments, and the benthic diatoms were brushed off about 10 days before use, and then filtered again with N103 sieve to remove large-scale algae and aging algae. Inoculate and reattach the plate to a thin layer of benthic diatoms for early consumption.
Disease prevention and treatment
In order to strengthen the reproduction of benthic diatoms, light can be properly adjusted, but the light intensity should be controlled at about 1000 lux. The light is too strong and easy to grow green algae and oscillating algae; during the cultivation period, weak air-inflating is required to effectively kill copepods. The copepods must be killed in advance before the release of the copepods. The attached tablets should be administered every 7-10 days after entering the pool; during the high water temperature period (above 20°C), antibiotics should be alternately injected 1-3ppm after changing the daily water to prevent diseases. happened.
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