Recently, the starfish in Qingdao, Shandong Province, have flooded again! Why use it? Because in March 2021, starfish flooded once, which brought great harm to the local aquaculture industry and made fishermen miserable. So where do these starfish come from? How should it be governed? Can eating solve the problem? Come and go, pay attention to passers-by, listen to what customers say.
Starfish: Ferocious predators!
Starfish is an invertebrate echinoderm that is very popular because of its bright and cute appearance and shape like a five-pointed star. However, in the eyes of people, the cute-looking starfish is actually a carnivore, and it is very fierce, and each horn of the starfish has a different role, of which 1-2 are in charge of the direction, and many of the tubes and feet under it are used to push the body forward.
Starfish don't attack like other predators, they slowly approach their prey, and then wrap their tube-footed suction cups around the prey and slowly eat. Starfish generally prey on abalone, shellfish and other animals for food, and the amount of food is amazing, most marine life is a stomach, but starfish is different, it has two.
However, starfish do not have enough digestive fluid in their stomachs, resulting in most of the food they bite, mostly only eat a small bite, equivalent to a clam, starfish only eat less than one-tenth, but after its bite, the entire clam will be bitten to death. Adding that the star absorbs too little, it will feel hungry and then keep looking for shellfish to fill its hunger.
In the past two years, every March, in the sea area of Qingdao Jiaozhou Bay, there will be a large number of starfish, specializing in preying on shellfish, abalone, sea urchins, etc. farmed in the sea, resulting in fishermen's shellfish being "swept away", starfish is also known as "seabed locusts", affected by an area of about 100,000 mu, causing great losses to farmers in Jiaozhou Bay.
According to fishermen, starfish can catch nearly 20,000 catties a day when there are many times, and fishermen catch starfish in large baskets and fill the ground. Fortunately, through the local fisheries department, the population of starfish has been controlled, so where do these starfish come from? Why the flood?
Where do the starfish in Jiaozhou Bay come from and why are they flooding?
The large number of starfish that appears in Jiaozhou Bay is mainly a spiny sea car (one of many types of starfish), in fact, starfish is also very common in the waters near Qingdao, but it is not as much as in the past two years, and the reasons for the flooding of starfish are threefold:
One is the strong reproductive ability, from October to January every year when the starfish began to breed in large quantities, and most of the starfish do not need to mate, through in vitro fertilization reproduction, males and females respectively release sperm and eggs into the water, each starfish can produce about 2.5 million eggs, sperm and eggs in the water after meeting will complete fertilization, and finally grow new starfish.
The second is the ecological and environmental impact, with the continuous improvement of marine ecology, the water quality, PH value, etc. in the sea will change, and such improvements have a direct impact on starfish, resulting in an increase in the survival rate of starfish cubs, and then the number of starfish is also increasing.
Third, there are fewer natural enemies, starfish have no natural enemies after adulthood, and other creatures in the ocean basically do not eat starfish, but there are many natural enemies in the time of starfish larvae, and most of the fish feed on starfish eggs or larvae. However, in recent years, with the overfishing of fisheries, resulting in a shortage of fish, starfish without the constraints of natural enemies, coupled with strong reproductive ability, which has made starfish wanton predators.
What are the dangers of starfish?
If starfish only reproduce in the ocean, it will not cause great harm, but if starfish gather in the breeding area, it will cause great losses to fishermen. Naturally, there is no shortage of food in the breeding area, which will cause the survival rate of starfish larvae to soar, resulting in a large number of flooding. In particular, starfish are not picky eaters, as long as they are shellfish, they will basically eat, so they will not only eat all the shellfish farmed by fishermen, but also threaten the release of new seedlings.
The second is to affect the ecosystem of the breeding area, starfish belongs to the organism that does not eat the prey to "curse", some fishermen in the breeding area found that the clams they raise in the sea, the only clam shell eaten by the starfish is left, so it needs to be treated as soon as possible, if no measures are taken, it is easy to affect the marine ecosystem, but also bring other indirect effects.
How does starfish govern? Can it be solved by eating?
Adult starfish have no natural enemies, the average lifespan can reach about 35 years, and starfish also has the ability to "regenerate", that is, if it lacks arms and legs, it can grow on its own, and generally does not die easily. Therefore, the fastest way to control the current treatment is fishing, through the fishermen's large number of fishing, to control the flood of starfish, while increasing the number of fish in the sea, can control the growth of starfish larvae.
For the starfish flood, there are many netizens who "apply to fight" and want to solve it by eating, just like crayfish, so can it really be solved by eating? Starfish can eat is can eat, but not delicious, cooking methods are relatively small, at most steamed or take out the yellow scrambled eggs and the like, compared to other seafood, it is not very popular, at most try fresh.
Moreover, the reproductive glands of starfish contain mild toxicity, and it is not recommended to eat more, especially for people with allergies and poor digestive function. However, in addition to eating, after starfish is dried, it is also a kind of medicinal material, and every year a lot of starfish flows into the market and is made into medicinal materials, so it can be used to the fullest.
Do you have any good methods for the starfish flood in Qingdao Jiaozhou Bay? Well, I'm here today, pay attention to the passers-by, have heard the guests say, we'll see you next time. #Qingdao Jiaozhou Bay starfish flood eating clam sea oysters ##Starfish ##青岛海域出现大量海星 #