What is the adaptability of sea cucumber to salinity? What is the difference between sea cucumbers and sea cucumbers

What is the adaptability of sea cucumber to salinity? Sea cucumber is a narrow salt organism, and the suitable range for salinity is 26 ‰ ~ 34 ‰. When the salinity is below 20 ‰, a large number of individuals die and fester. When the water temperature is below 20 ℃, the higher the water temperature is, the stronger the tolerance of sea cucumber to low salt is.

The difference between wild thorns and captive sea cucumbers is very obvious:

1. Bottom foot: wild sea cucumbers generally grow in the sea area with a water depth of about 20, and look for food through foot action, so the bottom feet grow short and sturdy; while captive sea cucumbers do not need to move because of the long-term use of bait put in by aquaculture personnel, and live in the water area. the action of the foot decreases, the adsorption is poor, and becomes slender.

two。 Sand mouth: the sand mouth of wild sea cucumbers is large and hard. Meat quality: wild sea cucumbers grow because of deep water (15 to 20 meters), low water temperature, little sunshine, slow growth, thick and elastic meat, broad and full tendons, and rich nutrients, while captive sea cucumbers grow fast. the meat is soft and not tight (which is very similar to a pig that comes out of the pen for three months).

3. Shape: wild sea cucumbers are spindle-shaped, thick at both ends, short and stout, and look very strong, while captive sea cucumbers grow slender and lack toughness.

4. Back thorns: the spines on the back and both sides of wild sea cucumbers are equally stout, while the thorns on the back and on both sides of the wild sea cucumbers may be different in thickness and length due to the influence of the growing environment, and the long and slender thorns appear to be powerless.

Growth years: wild sea cucumbers generally grow for more than 4 to 5 years before reaching the fishing standard, and the longer the time, the more nutrition deposition, the greater the nourishing value; and captive sea cucumbers in order to quickly achieve the purpose of marketing, quickly fattening sea cucumbers, in a short period of one to two years to catch and sell, the role of health nourishment is self-evident. In addition, wild sea cucumbers have a strong taste, no astringent taste, and the incisions are delicate, neat and uniform. As a more expensive supplement, it is recommended that people should pay attention to the choice of wild sea cucumbers as the first choice for nourishment and gifts, rather than blindly choose quick captive sea cucumbers.