How do octopuses breed? What do octopuses eat?

Cage culture can be used, and the mesh is smaller than the individual fish, so it is necessary to add a net cover to prevent the octopus from escaping, mostly in the harbor with quiet waves, and in spring and summer (June, July) and autumn (October-December). Seedlings: 36-42 kg per cubic meter in large cage and 25-30 kg per cubic meter in small cage. Bait: small mixed fish and shellfish with low price can be put, and frozen small mixed fish can also be put, but they must be fresh.

When it comes to animals like octopus, there must be no one who doesn't know, right? Octopus is very common in our lives, and people often eat it. Before the octopus on the market is basically from the wild, but with the development of technology, there are many ways to breed octopus, let's learn about it.

How to breed octopus

1, cage setting: can use cage culture (3.94m × 1.82m × 0.9m), the mesh is smaller than the fish species, need to add a net cover to prevent octopus escape, mostly in the harbor with quiet waves, the suitable water temperature is 15-23 ℃, in general, it is more in spring and summer (June, July) and autumn (October-December).

2. Seedling stocking: octopus fry caught in cages are the most suitable, and those caught from the bottom dragging net can also be used. the amount of seedlings varies according to water temperature and running water conditions, using large cages to release seedlings 36-42 kg per cubic meter, and small cages 25-30 kg per cubic meter. In order to prevent seedlings from killing each other, the same batch of seedlings should be put into the cage after eating.

3. Bait feeding: small mixed fish and shellfish with low price can be put, and frozen small mixed fish can also be put in, but they must be fresh. If the residual bait is often reduced or stopped for 1-2 days, it is better to cause water pollution. If you stop feeding for more than 3 days, you will kill each other. The feeding behavior was irregular when the water temperature was about 13 ℃, and the octopus did not eat when the water temperature was below 7 ℃.

4. Culture management: cage culture is suitable for large-scale aquaculture. The survival rate of seedlings caught in cage is 70-80% after 2 months, and the survival rate of seedlings caught by fishing is about 50%. When the seedlings were released in cages, the 15-day mortality rate reached 20-30%, and then the mortality rate gradually decreased. After 15 days of culture, the octopus was divided into large, medium and small sizes and cultured in different cages. Clean the cage once in 15 days in spring and autumn and once in 30 days in winter.

What kind of food does octopus eat?

Octopus is a carnivorous marine mollusk, feeding on branchial and crustaceans (shrimp, crab, etc.), and some species feed on plankton. This is not a question of whether it likes it or not, because stable structural myoglobin is a necessary condition for octopus to survive in the deep sea. Giant octopuses do not hesitate to fight to the death with sperm whales for astaxanthin resources. Astaxanthin is the strongest antioxidant and is a necessary condition to ensure the structural stability of myoglobin without being oxidized.

The difference between squid and octopus

1. Differences between families and genera

Squid: squid belongs to the molluscs of the genus Cephalopoda, Coleopoda, Cephalopoda, Scuttlefish, Scuttlefish.

Octopus: octopus is a mollusk of the genus octopus, octopus.

2. The difference between wrist and foot

Squid: squid has a slender, cone-shaped body with more than a dozen tentacles, two of which are longer. There is a sucker at the front of the tentacle, and there is a horny tooth ring in the sucker. When preying on food, wrap it around with the tentacle and swallow it. Like to gather in groups, especially in the spring and summer mating and spawning period.

Octopus: octopus body is short oval, saccular, finless, head and body boundary is not obvious, there are large compound eyes on the head and 8 retractable wrists, each wrist has two rows of fleshy suckers, usually crawl with wrists, sometimes swim through the telescopic membrane of the wrist, can hold other objects forcefully, and spray water from the funnel under the head for rapid retreating.

3. Difference of origin

Squid: squid is distributed in tropical and temperate waters between latitude 40 °S and N. The main squid fishing grounds in the world are in the northern South China Sea, the Gulf of Siam, Kyushu of Japan, the central Philippines, western Western Europe and the eastern and western waters of the United States. Most of the fishing grounds are located around the islands and reefs, with slow water flow, high salinity, rough bottom, submarine grooves, coastal water system and warm current water system.

Octopus: octopus is widely distributed in tropical and temperate waters all over the world, and is distributed along the north and south coasts of China. It lives underwater and adapts to a water temperature of no less than 7 ℃. The specific gravity of sea water is 1.021. It will die in a low salinity environment. The sediment of the sea area had better be a gravel zone.

How long is the life span of octopus?

The average life span of an octopus is only about 3 years. If the living conditions are very ideal and do not get caught, the octopus can live to about 4 years old at most. The lifespan of the deep-sea giant octopus is different. Some scientists say that the deep-sea giant octopus can live for up to 100 years, and its hatching time is as long as four and a half years. So far, the largest octopus tentacles have been found to be about 10 meters long. Biological experts say there may be octopuses of more than 15 meters (tentacle length) in the depths of the ocean.

This is the end of the introduction of octopus culture methods. I hope it will be helpful to everyone. At present, the prospect of octopus in the market is very broad, so want to join the aquaculture industry, this is also a good project.