How do sea cucumbers reproduce? What's the difference between sea cucumber and sea cucumber?

Sea cucumbers grow in the deep sea area and have no pollution. Due to the natural environmental factors and the influence of tides, its fishing has certain seasonality, and sea cucumbers with insufficient growth years are generally not fished. This is also the reason why sea cucumbers have thick meat, good taste toughness, many active substances accumulated in the body and high nutritional value. How do sea cucumbers reproduce? What's the difference between sea cucumber and sea cucumber?

How do sea cucumbers reproduce?

(1) hatching

(1) hatching in the incubator

The hatching density in the incubator is generally 100 / ml ~ 200 / ml. In the process of hatching, the eggs are suspended by regular stirring and hatching with water or aeration. When the egg develops to the blastocyst stage, it will be moved to the culture pool at a density of 0.5 / ml to continue cultivation.

(2) incubation in the breeding pond

The fertilized eggs are moved into the culture pool at the density of 1 / ml ~ 2 / ml. Because the density of the eggs is low, they can usually be hatched in still water.

(2) artificial insemination

(1) oviposition and insemination in the spawning box

The spawning box is mostly made of 0.1-0.5 liter plastic or fiberglass flume. Before spawning, fill the tank with seawater consistent with the temperature in the parent-ginseng storage tank or stimulation tank. Generally, there are two spawning boxes, one for female ginseng, the other for male ginseng and sperm. See the parent ginseng with signs of spawning and ovulation fished it into the spawning box in time, and pay attention to the action to be light so as not to affect the number of eggs. Because the eggs of sea cucumber are sunk eggs, the water in the box should be constantly stirred or slightly inflated in the process of spawning in order to prevent the development of the eggs from being affected by hypoxia. While spawning, semen should be added in time, preferably mixed semen of multi-headed male ginseng. The density of eggs in the spawning box is generally controlled within 200 / ml ~ 500 / ml. When the density is greater than this density, the eggs should be transferred to the incubation pool or incubation pool in time for hatching and breeding. This method can artificially control the amount of semen, there will be no polysperm fertilization phenomenon can greatly reduce the deformity rate of larvae.

(2) spawning and insemination in the pool

This method is to allow parent ginseng to spawn and ejaculate directly in the storage pond or breeding pond, and then move the eggs into the incubation pool or hatch in the original pond. Generally, male ginseng is discharged before female ginseng, and male ginseng is discharged in the pool for a while, so that there is a certain sperm density in the pool to induce female ginseng to spawn. After the female ginseng begins to spawn, the male ginseng is fished out of the pool, and the female ginseng is allowed to spawn and fertilize in the pool. This method is easy to produce too much semen and lead to high deformity rate because the sperm quantity is not well controlled.

What is the difference between sea cucumbers and sea cucumbers?

Sea cucumbers: sea cucumbers with flesh thorns on their backs are called sea cucumbers.

2. Sea cucumbers: sea cucumbers include sea cucumbers and light cucumbers, which are sea cucumbers without spines.

So sea cucumber is only a general term, we should make a clear distinction, sea cucumber can also be called sea cucumber, light cucumber can also be called sea cucumber. Cultured sea cucumbers can also be called sea cucumbers.