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Methods of Artificial Induced Spawning and Key Aquaculture Techniques for Snakehead
Artificial induced spawning uses injections of human chorionic gonadotropin and the pituitary glands of carp, bighead carp and bream. In the Pearl River Delta region, pituitary glands of carp, bighead carp and bream are basically used as spawning agents. The dosage per 0.5 kg of body weight is: for female fish, 7 pituitary glands of bighead carp or bream (1 carp pituitary is equivalent to
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Mushroom Compost Bedding and Spawning Techniques
1. Mushroom house disinfection: Before bringing in the compost, the mushroom house must be cleaned thoroughly. The surrounding walls and growing beds should be brushed or coated with bleaching solution or limewater for disinfection. Some lime should be scattered on the floor and wall bases, and a 20-times dilution of dichlorvos solution sprayed to kill insects and sterilize. Then close the doors and windows, and fumigate with 500 mL of formalin per 100 cubic meters of mushroom house. The specific method is to pour the formalin into an iron pot, add 5 times its volume of water, heat it on a charcoal stove, and let the formalin diffuse through the mushroom house with the steam. After 1 to 2 days, open the doors and windows for ventilation. Some mushroom houses are simply constructed and difficult to seal; in that case, spray the surrounding walls and mushroom beds with a 50-times dilution of lime-sulfur mixture.
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First scientific record of coral spawning on the East Coast reveals a red, purple and sapphire spectacle, prompting calls for conservation
Stunning coral spawning recorded scientifically for the first time on the East Coast! Red, purple and sapphire snowflakes fill the water, scientists call for conservation
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When do corals spawn? First record on the east coast, Taitung corals still healthy
Every year around the 23rd day of the 3rd lunar month, the birthday of Mazu, is the season when corals in the waters around Taiwan spawn en masse. On the 26th (the 22nd day of the 3rd lunar month), the Coral Reef Laboratory of the Biodiversity Research Center, Academia Sinica, recorded coral spawning at the Jihui coast in Taitung, and found that 8 species of coral, including Acropora, Stylophora, Pectinia, Lobophyllia, Merulina, Symphyllia, Hydnophora and Porites, were releasing sperm and egg bundles in large numbers.
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Exploring the Artificial Breeding of Chinese Sturgeon: The Ganzhou Dam Spawning Pool
Artificial Breeding of Chinese Sturgeon at the Ganzhou Dam Spawning Pool
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What are the causes of contamination in Lingzhi (Ganoderma) spawning?
1. Damage contamination (1) Container damage: mechanical damage caused by failure to handle with care during filling, sterilization, inoculation, transport and cultivation. (2) Air-pocket damage: rapid heating, pressure rise or rapid cooling during sterilization; excessive exhaust speed, causing bags to swell with air and rupture. 2. Cotton plug contamination (1) Cotton plug contamination: the test tube mouth is stained with culture medium or the bottle (bag) mouth is not clean, or the culture medium comes into contact with the cotton plug. (2) Cotton plug dampened: improper stacking during sterilization, too much water added, or unreasonably built sterilization stove, or culture
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Don't Forget to Protect Broodstock During Induced Spawning
Reducing the death of broodstock during induced spawning is an important technical task for fry producers. In production practice we have found that there are two reasons for the death of broodstock during induced spawning: first, the broodstock consumes a great deal of energy during the spawning and reproduction process, and combined with the side effects of the inducing drugs, the body's resistance declines; if the fish is severely injured, various pathogens will seize the opportunity to infect the fish, causing disease and leading to death. Second, the broodstock's constitution is poor, the gonadal development is not good, or the water temperature varies greatly during induced spawning, and the dosage of the inducing drugs is improper
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Straw mushrooms take only 7-10 days from spawning to cultivation: cultivation techniques
I. Determining the cultivation period. Straw mushrooms (Volvariella volvacea) like high temperature and high humidity, so in northern regions they should be grown in summer. In central Hebei and southern Hebei, this is generally from late May to early September, when the temperature inside plastic greenhouses can be maintained at 22-31°C. When cultivated in this period, the mycelium generally germinates on the second day after spawning, the mycelium runs through the substrate on the third day, and the first flush of mushrooms can be harvested on days 7-9; growers in other regions can adjust the cultivation period flexibly according to local climatic conditions. II. Selection and treatment of the growing substrate. The growing substrate is the nutritional medium for growth, and choosing a suitable substrate is
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Button Mushroom Spawning Methods and Technical Key Points
(1) Spawning date. In each region, an appropriate spawning period must be chosen according to local climatic conditions. The standard for the optimal spawning period is: during the mycelium-running stage of the compost, the natural temperature should be 24-26°C as far as possible. In the Yangtze River basin area, the spawning period is in early to mid-September; in Shanghai and areas near Shanghai, the optimal spawning period is September 8-12. If spawning is too early, temperatures above 28°C are often encountered after spawning, causing the spawn not to germinate and to die; if spawning is too late, the number of days suitable for fruiting is shortened, making it difficult to obtain high yields. (2) Before spawning
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