When it comes to octopus, there must be something I don't know. Octopus is very common in our life and is often eaten by people. In the past, the octopus on the market was basically wild, but with the development of science and technology, there are also many ways to artificially breed octopus. Let's have a look.
How to breed octopus
1. Cage setting: cage culture can be used (3.94m 1.82m 0.9m, the mesh is smaller than that of individual species, so it is necessary to add a net cover to prevent octopus from escaping. Most of them are cultured in a quiet harbor with waves, and the suitable water temperature is 15-23℃, generally in spring and summer (June and July).
2. Stocking fry: The fry caught in cage is the most suitable, but the fry caught in bottom trawl can also be used. The release amount of fry varies according to the water temperature and running water. Stock 36-42kg fry per cubic meter in big cages and 25-30kg fry per cubic meter in small cages. In order to prevent the fry from killing each other, the same batch of fry should be released, and the fry should be put into the cage after eating.
3. Bait feeding: low-priced small miscellaneous fish and shellfish can be put in, and frozen small miscellaneous fish can also be put in, but it must be fresh. If the residual bait is long 1-2 days, it is best to reduce or stop feeding. The residual bait will cause water pollution, and if feeding is stopped for more than 3 days, it will cause cannibalism. When the water temperature is about 13℃, the feeding behavior is irregular, and when the water temperature is lower than 7℃, the octopus does not eat.
4. Culture management: cage culture is suitable for large-scale culture. After two months of culture, the survival rate of larvae caught in cages is 70-80%, and the survival rate of larvae caught in cages is about 50%. 15 days, the mortality rate of larvae in cages reached 20-30%, and then gradually decreased. After 15 days of culture, the octopus was divided into three sizes, big, medium and small, and kept in different cages. Clean the cage once every 0/5 days in spring and autumn/kloc-and once every 30 days in winter.
What food does octopus eat?
Octopus is a carnivorous marine mollusk, which feeds on petabranchia and crustaceans (shrimp, crab, etc.). ), and some species eat plankton. This is not a question of whether it likes it or not, because the stable structural myoglobin is a necessary condition for octopus to survive in the deep sea. Giant octopus does not hesitate to compete with sperm whales for astaxanthin resources. Astaxanthin is the strongest antioxidant and a necessary condition to ensure the structural stability of myoglobin from oxidation.
The difference between squid and octopus
1, the difference between families and genera
Squid: Squid belongs to mollusks in the animal kingdom, mollusca, Cephalopoda, Coleoptera, Squid, Squid.
Octopus: Octopus is a mollusk in the animal kingdom, mollusca, Cephalopoda, Octopus, Octopus, Octopus.
2. The difference between wrist and foot
Squid: Squid has a slender body and a long cone shape, with more than a dozen wrists, two of which are longer. There is a sucker at the front end of the wrist, and there is a horny toothed ring in the sucker. When preying on food, wrap it around your wrist and swallow it. I like to get together, especially when mating and laying eggs in spring and summer.
Octopus: Octopus has a short oval shape, a capsule shape and no fins. The boundary between head and body is not obvious. There are big compound eyes on the head and eight retractable wrists. Each wrist has two rows of fleshy suckers. Usually, it crawls on its wrist, and sometimes it swims by stretching the interosseous membrane. It can effectively hold other things and use the funnel at the bottom of the head to spray water and retreat quickly.
3. Difference of origin
Squid: Squid is distributed in tropical and temperate waters between 40 north and south latitudes. The main squid fishing grounds in the world are in the northern South China Sea of China, the Gulf of Siam, Kyushu, the central Philippine Islands, western Europe and the waters of the east and west of the United States. Fishing grounds are mostly located around islands and reefs, with slow water flow, high salinity, thick and hard bottom and sunken seabed, and are at the intersection of coastal water system and warm water system.
Octopus: Octopus is widely distributed in tropical and temperate waters all over the world, and distributed along the north and south coasts of China. If you live underwater, the adaptive water temperature should not be lower than 7℃, and the most suitable ratio of seawater is 1.0 1, and the environment with low salinity will die. The sediments in the sea area are preferably gravel layers.
How long can octopus live?
The average life span of octopus is only about 3 years. If the living conditions are ideal and they are not caught, they can live to be about 4 years old at most. The life span of giant octopus in the deep sea is different. Some scientists say that the life span of deep-sea giant octopus can reach 100 years, and the incubation time is as long as 4.5 years. So far, the largest octopus tentacle has been found to be about 10 meter long. Biologists say that there may be octopuses in the depths of the ocean that are more than 15 meters long.
Here's a brief introduction to the octopus breeding method, hoping to help everyone. At present, the prospect of octopus in the market is very broad, and it is a good project to join the aquaculture industry.