What is the main purpose of artificially denaturing eels with new technology in Japan?

With the decrease of the number, the price of eel has remained unchanged in recent years.

A rising tide lifts all boats, because there has been eel cooking since ancient times.

Culture has a great influence on Japan, and friends who go to Japan know that people there especially like to eat eels. Although eels are delicious, farming is a hassle.

Due to the increasing demand of foodies, eel farming is becoming more and more difficult. In order to meet the market demand of female eels, Aichi Fishery Experimental Field in Japan recently announced that it has developed a technology that can turn male cultured eels into females, and is applying for a patent for this technology, which has caused controversy for a time.

Eels lay eggs in deep sea and breed in fresh water.

Very long. Fierce, greedy, active, nocturnal, eager.

Strong optical rotation, like running water, so warm.

Adult eels grow fast, with a round appearance, like a round cone, and bright colors.

It's dark and tender, with many artificial breeds and fresh meat. this

Fish is common all year round, but Xia Dong is the richest in two seasons.

Delicious. Eels are nutritious, delicious and have fewer thorns.

Meat, and has the functions of cooling and relieving summer heat, nourishing and strengthening the body.

The sex of eels is uncertain at birth, and it is not clear until the body length exceeds 30 cm. More than 90% of the cultured eels are male, and the fish body and skin are easy to harden, usually weighing only 200 to 250 grams when loaded. Compared with males, female eels are not only large in size, but also tender in meat. However, in recent years, the catch of eels has decreased and the output has decreased, so the market demand for female eels has increased. Because of their love for eels, people over-catch wild eels. Now, Japanese eel is listed as an endangered species by IUCN, while European eel is even worse and extremely endangered. Under the subsidy of the state, the experimental field has developed a method to change the sex of eels, that is, adding estrogen-like ingredients into the bait? Soybean isoflavone? And adjust the feeding method. The results showed that after feeding eel fry in this way for a period of time, more than 90% of male eels became females. Although the Japanese Medicine and Medical Devices Law prohibits the administration of estrogen to edible fish, it is said that there is no problem in adding soy isoflavones.