The wild Chinese horseshoe crab is inedible, and it has been listed as a key protected animal in China, and it is forbidden for any unit or individual to illegally kill, buy, process and carry it, so the wild Chinese horseshoe crab is inedible. But cultured Chinese horseshoe crab is edible.
The method of artificial breeding:
1, culture pond preparation
Chinese horseshoe crab can be temporarily raised. Generally, the temporary nutrients are indoor culture and outdoor culture. Indoor aquaculture ponds are all built of bricks, and then painted with cement. After the cement pond is repaired, a layer of river sand should be laid on the bottom of the pond, and an aerator and seawater injection equipment should be installed. The outdoor culture pond is a soil pond, and the cost is much lower than that of indoor culture. At the same time, it is necessary to install the water gate at the entrance and exit to facilitate water intake and drainage.
2, bait preparation
Chinese horseshoe crab has high requirements for feed, so we must prepare the feed needed by horseshoe crab first when breeding. The horseshoe crab mainly feeds on small miscellaneous fish, oysters and SINONOVACULA constricta, among which oysters and SINONOVACULA constricta are the best to feed, which is more in line with the life habits of horseshoe crab. Of course, the cost of live bait is too high, so it is necessary to use frozen feed, which is mainly small miscellaneous fish.
3. Feeding technology
The culture technology of Chinese horseshoe crab is very important and needs very careful care. It is very sensitive to water temperature, which will directly affect its food intake. Generally, it is most appropriate to control the water temperature between 20-25 degrees. The appetite of Chinese horseshoe crab is very good. At this time, our feeding amount should be increased appropriately, but if the temperature drops, we need to reduce the feeding amount appropriately.
There is also the need to clean up the remaining food residues in time after the horseshoe crab is eaten, so as not to pollute the water quality. Finally, remember to change the water every day, usually in the morning, and you need to clean and disinfect the aquaculture pond every week.
Extended data
Limulus is an ancient creature, which lived on the earth as early as Devonian more than 300 million years ago, and still maintains its shape. It can be called an ancient adherent in the ocean, and it is an animal of the same period as trilobites.
When primitive fish just came out and dinosaurs didn't rise, horseshoe crab was a prosperous marine resident in Devonian (Permian 225 million years ago) 395-345 million years ago. Despite the vicissitudes of hundreds of millions of years, the species remains the same with little change. Therefore, it is called "living fossil".
Origin: China, Indonesian, Japanese, Malaysian, Philippine and Vietnamese.
China: It is distributed along the coast from Zhapu in Zhejiang to Fujian, Guangdong, Taiwan Province, Guangxi and Hainan.
It is very difficult to know that a horseshoe crab grows up, because its growth cycle is very long, and it takes nearly 13 years to complete its reproduction. Although a female horseshoe crab can lay up to 90,000 eggs at a time, the final survival rate is only one in ten thousand, because there are too many "accidents" in their growth process, and most of them are eaten by fish, turtles and flying birds.
However, it will take many years to grow up to the age of breeding the next generation. The female horseshoe crab matures more slowly, and the male horseshoe crab can mate after 89 years, while the female horseshoe crab has to wait 10 to1years from birth to mating.
Use of blue blood of Chinese horseshoe crab;
Mysterious blue blood is flowing in the Chinese horseshoe crab. Our bodies rely on iron-based hemoglobin to transport oxygen vapor to the whole body, while horseshoe crabs rely on copper-containing hemocyanin. What is precious is not only the color of blood, but the hemocyanin in this blue blood will automatically form a sticky membrane when the Chinese horseshoe crab is injured and attacked by bacteria, which will seal the bacteria, thus preventing the bacteria from spreading in the horseshoe crab.
Since Frederic Bong, a physician at Johns Hopkins University, discovered this characteristic of horseshoe crab blood in 1956, medical scientists have been trying to apply hemocyanin to medical treatment. In order to ensure the safety of vaccines and injected drugs, scientists first injected this hemocyanin into experimental samples. If hemocyanin began to secrete colloidal substances, it indicated that the product was not mature.
In 1970s, the US Food and Drug Administration imposed the test on experimental drugs and surgical implants. Without the great existence of horseshoe crabs, thousands or even millions of people would have died from unsanitary injections in the past forty years.
Because of this precious medicinal value, horseshoe crab blood is far more valuable than we thought, and once sold for $0.5 million per quart (1. 1 liter)/kloc-0. This "miracle drug" is extracted from 600,000 "donors" every year, and 30% of the blood is extracted from each horseshoe crab within 48 hours and then released.
Sadly, some horseshoe crabs whose blood has been drawn will not live for two days at all. About 10%- 15% of horseshoe crabs caught will die in the process of blood drawing, and even the survivors will be depressed in the process of returning to the ocean, as if their bodies were hollowed out.
For the sake of ecological balance, and for the sake of horseshoe crabs not dying out because of this blood-drawing behavior, scientists are not ignoring this problem. At present, some scientists are developing artificial hemocyanin, of course, I hope they can succeed as soon as possible, but horseshoe crabs can be freed as soon as possible.
References:
Baidu encyclopedia-Chinese horseshoe crab