CATDOLL : CATDOLL: What are the technical points of clam seed cultivation?

1. What are the technical points of clam seed cultivation?

The most common type of clam is the tetrapod clam, commonly known as the white clam, which lives in the ground and is widely distributed along the coast of my country.

During the peak breeding season, select 2-year-old shellfish with a size of 4 to 5 cm, and after selection and washing, store them for spawning. The best way to collect eggs is to dry them in the shade for about 4 hours, put them in still water for 2 hours, and then put them in 0.025% ammonia seawater. After the parent shellfish are discharged, they are immediately moved to a new pool for discharge, so that the eggs and sperm produced are not affected by the ammonia seawater. According to experience, the effect of inducing spawning is better after the parent shellfish have been cultured for a period of time during the peak breeding season, and the induction rate can reach 60% to 80%.

Because it is easy to cause too much sperm when the broodstock discharge, which affects the hatching of embryos and deteriorates the water quality of the nursery, it is generally necessary to wash the eggs 2 to 3 times to improve the hatching rate. The time required for embryonic development shortens with the increase of temperature. At 15-30℃, the hatching time is 60-10 hours, but the hatching rate decreases with the increase of water temperature. Generally, it is best to choose around 20℃. After reaching D-type larvae, selection and breeding are carried out. The suitable conditions for larval breeding are seawater salinity of 13-33 and water temperature of 18-23℃. The growth is faster and the development is better. For the selected larvae, only water is added in the first three days, and it is constantly stirred or aerated, and then the water is changed every day. Feed with Isochrysis, Triangle Brown Finger Algae and Mou's Horned Algae, with a daily feeding amount of 10,000 to 60,000 cells/ml. Feed in 2 to 4 times, and increase with the development of the larvae. When the shell is 130-145 microns long and the larvae enter the late stage of the shell top and metamorphosis, yellow sand is put in as the substrate. The yellow sand has been fully cleaned and disinfected in advance. When changing the water, the substrate dirt should be sucked out to prevent substrate pollution; after changing the water every day, a mixture of flat algae and golden algae is fed. When the juveniles grow to 1.2 mm, the water inlet pipe is formed, and its length is about half of the outlet pipe; when it reaches 0.5 cm, it can be taken out of the pond for intermediate cultivation.

2. It's October in the Gregorian calendar. Can we still catch toads? Where can we catch wild toads? I need them urgently.

Most toads hibernate in October, making them difficult to catch. Capture locations: near water surfaces or underground water wells, around wells used for irrigation in rural areas, low-lying areas near rivers (rarely near rivers), woods with few people, around tree roots, and must be uncultivated woods. These places need to be dug.

Hibernation: Also called "winter hibernation". The life activities of some animals are extremely reduced in winter, which is an adaptation of these animals to the adverse environmental conditions in winter. Bears, bats, hedgehogs, polar squirrels, frogs, snakes, etc. all have the habit of hibernation.

Medicinal value of toad: Toad tastes fishy, ​​warm and toxic. It belongs to the heart meridian and has the effects of detoxification, analgesia and opening the mind. The "Unique Secret Recipe for Cancer" compiled by the Chinese Folk Traditional Chinese Medicine Research and Development Association states that toad skin is fishy, ​​cool and slightly toxic, and has the functions of detoxification, diuresis, swelling and treatment of various tumors and cancers. In 1999, it was tested by Shanghai Jiaotong University's quantum medicine, and the effective content of ingredients for the treatment of cancer, liver cirrhosis and pain exceeded 8,000 (all ingredients with an immune function of more than 8,000) were found. The "Compendium of Chinese Medicine" published by Huaxia Publishing House states that toad skin is less toxic and is mainly used for sores, swelling and malnutrition in children. It is commonly used to treat tumors in modern times. The "Compendium of Chinese Herbal Medicine" published by Yuanfang Publishing House introduces that toad skin can treat cancer, leukemia, lymphoma, etc.

3. Can I catch a rhinoceros beetle in October? Can I keep it alive?

All the adult rhinoceros beetles died in October.

April. Can I still catch crabs, seashells, etc. when I go to Rizhao to catch seafood in October?

The sea water is a little cold now. Adults can adapt to it, but your child is over one year old and it seems not so suitable. It is OK to wear water shoes. There are shells and crabs. Welcome to the beautiful coastal city of Rizhao.