Jellyfish artificial breeding technology
Jellyfish are low-grade multicellular animals and alternately reproduce generation by generation. Jellyfish type produce asexual generation of leeches through sexual reproduction, and leeches generate sexual generation of jellyfish through horizontal rift. The Minamata Camp has a solid life and jellyfish camps live in plankton. The so-called jellyfish, which is an individual used in fishery, refers to jellyfish-type adults.
Begonia is a warm-water large-scale edible jellyfish, which is mainly produced on the coast of China; there are also small-scale productions in western Japan and southern North Korea; and records have also been recorded in the Far East Sea area of ​​the former Soviet Union. Living in coastal waters for life, especially near the stricken estuary, the water depth of the distribution area is generally 5-20 meters. The water temperature adaptation range is generally 16-30 °C, the optimum 18-24 °C, the upper limit of lethal water temperature is 35 °C. The adaptability range for salinity is 10-32 ‰, and the optimum range is 14-20 ‰; the lower limit of lethal salinity is 6 ‰. Hibiscus light intensity below 2400 lux in weak light conditions.
The movement of the jellyfish mainly depends on the rhythmic relaxation and contraction of the circular muscles of the inner umbrella. When the ring muscle contracts, the seawater in the lower chamber of the umbrella body is squeezed out, and the reaction force generated generates the body to advance towards the top of the umbrella. The circumflex muscles of adult jellyfish contract about 50 times per minute. This circular motion of the circular muscles continues from birth to death day and night.
The jellyfish are dioecious and mature in autumn. There are four gonads, which are in a folded shape. They are located in the elimination cavity following the genital cavity and are separated by a plastic film. They do not communicate directly with the outside world. The number of individual eggs is in the tens of millions, and they are discharged in batches. No reproductive tube, mature sexual products directly dispersed in the elimination of the cavity, excreted through the mouth.
The slender tentacles of the sea larvae have many stinging cells. The stinging cells contain toxins. They can anesthetize or kill small zooplankton by barb-radiating toxins, and then the tentacles feed the trapped creatures into the mouth; the tentacles are The gravid larvae prey on organs. The jellyfish's dish-shaped larvae have a square mouth. During growth and development, with the formation of the oral wrist, approximately 20 mm of umbrella diameter, the base of the oral wrist is healed and closed at the center. Instead, many of the mouthpieces that appear at the base of the small fingertips of the wrists and shoulders are connected to the outside world. The mouth is very small and can only eat plankton. There are many stinging cells on the finger and filament appendage near the mouth, forming a powerful predator system. There are about 40 kinds of foods in Liaodong Bay Begonia, belonging to diatoms, protozoa, crustaceans, polychaete larvae, shellfish larvae, and shellfish and egg shells, but with small crustaceans and ciliates. And shellfish mainly larvae. Most food organisms are less than 1 mm. Jellyfish feeding activity night and day, once after 3-4 hours after satiation largely digested food. Food intake was large, and Artemia nauplii counted 230 million individuals with an average daily intake of 2.9 million. Abnormally rapid growth, discoid larvae weighing only 3 milligrams, after 3 months of growth, up to 10 kilograms or more, more than 300 million times the weight gain. The largest individual is up to 50 kilograms.
The whole artificial breeding of sea oysters, the collection and transportation of sea bream broodstock, and the cultivation of all artificial quails have been resolved. Since the 1980s, the Marine Fisheries Research Institute of Zhejiang Province has carried out artificial breeding of sea bream and natural regeneration and propagation of sea areas, and has achieved remarkable results. The Liaoning Marine Fisheries Research Institute has also adopted artificial means to study the ecology of sea lice. Juveniles are raised to sexually mature sea lice. The cultivation of the jellyfish parent must keep the water quality fresh, and the water should be completely changed every 2 days. Incubating the water temperature is 18-20°C for individuals with an umbrella diameter of 100 mm or less, and 20-24°C for those with diameters greater than 100 mm. However, if the water temperature exceeds 28°C, it is not conducive to the development of a fan. Figure yo Li Huang? Kechundangtun dew caries? misty dew skirt? Tuokuobucha fan ∠Φ trained to seek N foot hazy? T Mozuogupiao ?? ?? crescent discuss school back prostitute Huomozili? sole Huang Lu real grate segment insanity? ⌒ through ∮ taste? Zheng? Yan? mo yesterday Di satisfied? shi ⒂ ?? / p>
It should be said breeding techniques and methods proliferation of jellyfish have been more mature. Before this, artificial breeding of sea bream was less, and it was feasible to carry out appropriate artificial breeding based on its biological characteristics and requirements on water quality and the environment, such as the northern port of Hong Kong.
China's South (Zhejiang) North (Liaoning) is an important production area of ​​the two sea slugs. The mature period of sea slugs begins in late August and the reproductive period lasts until mid-to-late October. Sex products (eggs or sperm) mature in batches and are discharged in batches; the emission of the same batch of sexual products lasts for several days. In a reproductive season, sexual products have a peak of 2-3 discharges.
The first step in the artificial breeding of sea lice is to cultivate the zoea. The time to artificially propagate pods is autumn (from August to mid-October), and the time to release larvae or cubs is the summer of the second year (May. From late to early June, there will be a period of 7-8 months and a winter period. Therefore, the second step in artificial breeding of sea lice is wintering management, with indoor wintering, wintering in natural sea areas, and wintering in earthen ponds. The third step of the artificial breeding of sea lice is the larval reproduction of the larvae to produce a discoid larval body that is essentially young jellyfish. After the wintering of zoea larvae, with the increase of water temperature, the metabolic acceleration, the need to increase the frequency of feeding and feeding amount, and more water, and promote the maximum growth of zoea larvae individuals. Disc larval camp floating life. After being fed for 1-2 days, the primary dish-like larvae have enhanced planktonic ability and can freely feed and grow in the ocean. Generally, 3-7 days old dish-shaped larvae (parameters about 5 mm in diameter) are released. The discharge time should be determined by the water temperature of the sea area. It is better to increase the water temperature to 15-18°C. The most important condition for the selection of discharge sites is that the waters are rich in planktonic feeds; it is best to first select coastal estuaries or inner bays that once were high yields in sea bream and resources have been significantly reduced.Our company's Frozen Green Beans use local and imported ingredients, certified organic products, do not use synthetic chemicals and fertilizers during the growth process, do not use any additives, colorants, etc. during processing, is 100% Organic green beans.Our company has large of green beans ,hope you can visit our company ,and also we can have a long business connection.
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