The artificial propagation techniques of hippocampus
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The reproduction of the hippocampus is from March to November all year round. The water temperature is 20°C to 30°C, which is the breeding season of the hippocampus. From May to September, the water temperature of 25°C-28°C is the prosperous period of reproduction. However, due to the slimness of the hippocampus after winter, the adaptability to environmental changes is poor. Therefore, it is necessary to take measures of male-female division, rearing, 25 to 30 tails per square meter, and give enough food, and pay attention to the conditions of water temperature, light, and specific gravity to promote cultivation.
1. The artificial breeding of broodstock in the hippocampus can be used as a broodstock with ages of 1 year to 2 years and healthy, complete, large and plump male and female individuals. First, the male and female broodstock are separately reared in a nursery pond. The nursery area is about 4 to 6 square meters, and the depth is 1.5 meters and the width is 2 meters. The water quality is good, and the water temperature changes little. Each square meter stocking progeny of 20 to 30 tails, feeding live cockroach, amphetamines, oysters and other live bait, with a small amount of artificial fresh bait, daily feeding bait 3 times -4 times.
2. After a period of intensive water temperature, the gonads of the broodstock gradually mature. The male hippocampus begins to estrus at about 16°C, while the female hippocampus only sees estrus at about 19°C. Therefore, during the cultivation period, artificial warming is required. When the natural water temperature reaches above 20° C. and is stable, male-male polyculture is conducted and the individuals are laid eggs by 1:1.
3. The light water temperature is 15°C, and the illumination is over 200 Lux. More than 50% of the male hippocampus begins to develop blue light, and the light intensity is below 200 Lux, and the estrus phenomenon is greatly reduced. In the breeding season, there is a certain role between the illumination of 5000Lux-10000Lux.
4. The proportion of more than 1.017 seawater to cultivate pro-hippocampus, less health and disease, the survival rate of more than 80%. Below 1.01, there are many diseases and mortality.
5. Breeding hippocampus mostly in the morning or early evening mating, during which the appetite decreased slightly, body color faded, males and females chased each other, and flowed side by side. When the excitement reached a climax, the rearing bag of the male anus expanded, showing a transparent, bag mouth. Open. Female genitals are prominent. The male and female tail hooked each other, and the females put the eggs into the male nursery bags where the eggs were fertilized. The parenting bag when mated is small, transparent and soft. With the development of the ligand in the bag, the bag becomes larger and darker. During the child-raising period, he was not happy to swim, and often used the bottom of the pool to reduce appetite. At this point should be carefully nursed, the operation should be brisk, the time from the water should not be too long, the temperature difference should be less than 2 °C -3 °C, to prevent miscarriage. Feeding 4 times -5 times a day, the bait should be fresh, the size is suitable, the amount of feeding should be less, the water quality should be clean, and the oxygen content is high. The fertilized eggs are hatched within 23 days to 25 days in the nursery bag. The number of seedlings per "fetal" in the hippocampus ranges from 10 to more than 1,000. Under artificial breeding conditions, some hippocampus have poor fertility. For example, only 20%-70% of the individuals in the sea horse and Sanzhe hippocampus have reproductive ability. This factor should be taken into consideration before planning nursery. Male hippocampus breeds seedlings before dawn, usually within a few minutes to ten minutes. If it is affected by low temperature or other factors, it can also be delayed by 1 day to 3 days. The quality of the seedlings produced in a short period of time is good, but the quality is poor when the duration is long. In case of dystocia, you can use the left hand to hold the pro-haima, and the right hand gently massages in the direction of the nursery bag to perform artificial midwifery. The quality of seedlings produced by artificial midwifery is also good. After the male hippocampus has finished its production, it should be picked up immediately and cultured separately from the seedlings to prevent it from swallowing or harming seedlings.
