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How to Select, Choose and Release Softshell Turtle Hatchlings for Breeding? A Detailed Guide to the Methods
The softshell turtle, also known as the Chinese softshell turtle, is what people often call "wangba." Because its meat is delicious and nutritious, it is one of people's favorite nourishing aquatic delicacies. Many times the softshell turtle is regarded as a close relative of the tortoise, but in fact the two are completely different species. Nowadays, however, the softshell turtle, like the tortoise,
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What are the methods for selecting soil insects for breeding and hatching soil insect larvae?
The soil insect, also called the ground beetle or soil turtle insect, is an insect that tolerates cold and heat, likes to live in groups, and grows in remote, moist, loose, and fertile soil. It has the habit of hiding by day and coming out at night to feed. With the development of the medicinal value of the soil insect, many farmers are now artificially
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At what size do crucian carp spawn, and how many days does it take for the eggs to hatch into fry?
Crucian carp, commonly known as crucian, with local names such as jiguazi, yuejizai and tuji, can produce many new varieties through artificial breeding and selective breeding. So at what size do crucian carp spawn? How many days does it take for the eggs to hatch into fry? According to farmer Mr. Zeng, the gonads of crucian carp mature earlier than those of other fish; fish in their second year can spawn, and they continue to grow in size while spawning. One-year-old crucian carp can already spawn. Moreover, the spawning period is long, lasting from spring all the way to autumn, and the number of eggs laid is large; the eggs are laid on aquatic plants or other objects in shallow water. The strong reproductive capacity of crucian carp is an important reason why it is widely distributed and abundant. There is another point: crucian carp still forage for food during the spawning period, which is different from other fish. <p style="text-align: center;"></p> <p style="text-indent:2em;"><span style="color:#FF0000">How many days does it take for the eggs to hatch into fry?</span></p> <p style="text-indent:2em;">Generally, it takes 3—7 days from the laying and fertilization of the eggs to the hatching of the fry. If the average water temperature is 15—20°C, the hatching time is 5—7 days; if the average water temperature is 20°C, the fry can hatch in 4—5 days; if the average water temperature is 20—25°C, only 2—3 days are needed. In short, the lower the water temperature, the longer the hatching time.</p> <p style="text-align: center;"></p> <p style="text-indent:2em;"><span style="color:#FF0000">Crucian carp farming techniques</span></p> <p style="text-indent:2em;">1. Pond conditions</p> <p style="text-indent:2em;">Crucian carp has the habits of liking to gather in groups, burrowing into mud, and leaping upstream to escape. The pond area for mainly farming crucian carp should not be too large; generally about 2 mu is suitable, and it should not exceed 4 mu. The pond bottom should be relatively hard, generally with a mud thickness within 10 cm; when it exceeds 10 cm, the mud must be cleared to facilitate the catching (catching) of crucian carp. The pond embankment should be solid and not leak water, and sturdy and reliable fish-blocking screens should be installed at the water inlet and outlet. The fish-blocking screen should be 50 cm higher than the highest water level of the pond.</p> <p style="text-indent:2em;">2. Variety selection</p> <p style="text-indent:2em;">At present, there are many crucian carp varieties sold on the market, and it is inevitable that good and poor ones are mixed. Practice has proved that allogynogenetic silver crucian carp and high-back allogynogenetic silver crucian carp (abbreviated as high-back crucian carp) are suitable for main farming, and their growth speed is 2 times and 3 times faster than ordinary crucian carp respectively. Allogynogenetic silver crucian carp and high-back crucian carp are similar. The differences between allogynogenetic silver crucian carp and ordinary crucian carp are: allogynogenetic silver crucian carp has 31-32 scales along the lateral line, while ordinary crucian carp has 28-29; allogynogenetic silver crucian carp and high-back crucian carp have the same number of lateral line scales, but high-back crucian carp has a short head, high back, thick body, and round abdomen.</p> <p style="text-indent:2em;">3. Stocking density</p> <p style="text-indent:2em;">From the perspective of farming economic benefits, if the stocking number exceeds 2000 fish/mu, although a higher yield can be obtained, the individual commercial fish raised are small, the selling price is low, and the benefit is not ideal; if the stocking number is less than 1000 fish/mu, although the individual commercial fish are larger, the total yield is not high and the sales income is low. Stocking 1400 fingerlings of 30 grams each per mu or 1200 fingerlings of 50 grams each per mu, with an appropriate amount of silver carp, bighead carp and summer grass carp, with the total number of mixed fish not exceeding 600, can achieve a net yield of more than 500 kg of crucian carp and about 200 kg of other fish, giving an ideal effect.</p> <p style="text-indent:2em;">4. Water quality management</p> <p style="text-indent:2em;">The calcium and phosphorus content in the body of crucian carp is more than 2 times that of other fish, so the water is required to be rich in calcium and phosphorus to meet the physiological needs of crucian carp. Apply quicklime solution once about every 20 days, with 60 kg per mu each time; apply superphosphate once every 15 days, with 15-20 kg per mu each time. Superphosphate can only be applied 3-5 days after applying quicklime, to prevent the water from being too alkaline and reducing the effect of phosphate fertilizer.</p>
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How big do koi carp need to be to spawn, and how long does it take to hatch out fry?
Koi carp is a high-end ornamental fish popular around the world today, praised as a living gem in the water and a work of art that can swim. So how big do koi carp need to be to spawn? How long does it take to hatch out fry? According to Mr. Wu, a large-scale breeder, koi carp are oviparous animals; male koi mature at 2 years of age, and female koi mature at 3 years of age. Once the gonads are mature, they can begin to spawn and reproduce; afterward, the gonads mature periodically once a year, allowing one round of reproduction per year.
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How much is a baby crocodile in wholesale? Are small pet crocodiles easy to keep?
Crocodile hatchlings refer to young crocodiles that are still in their juvenile stage and not yet fully developed. In recent years, with the rapid development of the crocodile farming industry, the wholesale price of crocodile hatchlings has quickly attracted more consumer attention. So how much does one crocodile hatchling actually cost? Are small pet crocodiles easy
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Chick Hatching Season, How to Tell Males from Females, Feeding Precautions, and Farming Techniques
Chicks are the young of chickens, hatched from eggs. They grow by eating feed as well as green vegetables, small insects, and broken rice. Chickens are the most commonly raised poultry by humans. So in what season do chicks generally hatch? How do you tell males from females? What should you pay attention to when feeding them? What are the farming techniques?
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What do freshwater hatchetfish (Gasteropelecidae) eat and how big can they grow? Care and male-female identification
Hatchetfish, also known as flying characins, are a common type of ornamental fish. Because they are the only fish that can truly fly, and their flight differs from the gliding of flying fish, they attract a large number of ornamental fish enthusiasts. They are currently available for sale on the market. So what do hatchetfish eat to grow? How big can they grow? How do you tell male from female? How
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How many days does it take for silkworm eggs to hatch? Learn how to store them until next year and tell whether they are alive or dead
China is the first country in the world to raise silkworms and produce silk fabrics; its origins date back to the Yellow Emperor period, with more than 4,000 years of history. A silkworm's life goes through four different stages: egg, larva, pupa and adult. So how many days does it take for silkworm eggs to hatch? How do you
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The four growth stages of silkworm babies: how many days for eggs to hatch, how many times they molt, and how they become silkworm moths
The silkworm, also known as the mulberry silkworm or Bombyx mori, is an economically important insect commonly found in southwestern China, the Jiangsu-Zhejiang region, Anhui and other places. Because it can spin silk and be made into various silk fabrics, it is widely raised. So how does a silkworm become a silkworm moth? How many days does it take for eggs to hatch? How many times does it molt in its lifetime?
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How to raise newly hatched fry to improve the survival rate?
In plain terms, newly hatched fry refers to the small seedlings that emerge when fish eggs hatch and shed their shells. Generally, those that can be released into ponds and shipped are seedlings 3-4 days after hatching, with a body length of 0.5-1cm, and the whole body is semi-transparent or light gray-black. If the newly hatched fry are kept in a tank for too long after hatching,
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