At the time of the flood season of the Yangtze River, the fishing boats of the provinces and cities of Jiangsu, Zhejiang, Anhui, Anhui, and Shandong gathered in the Yangtze River estuary. Since the Yangtze River produces seedlings that are "Japanese crickets," it is superior to French-made "European oysters", American-made "American quail", Indonesian, Australian-made "Australian oysters" and Philippine-made "Philippine oysters." Not only the price is significantly different, but also suitable for China's farming. In order to avoid farmers being deceived when purchasing seedlings, the characteristics and identification methods of various seedlings are described below:
First, look at the body type Japanese seedlings for the long-fin type, the body is transparent, the body is more round, no melanocytes on the tail stalk, eyes small, long-knee and long; Europe seedlings are also long-fin type, body circle, individual ratio About 250% of the Japanese eel have stellate melanocytes on the tail shank. There is a red line along the spine leading to the tail. Eyes are short and kiss. Nighttime light illuminates the abdomen and glaucoma occurs. The American eel is short and its eyes are protruding and small. Others are similar to Japan; Australia is relatively small. The head is slightly blunt and there is a star-shaped dark spot on the tail. There are 7 to 9 fewer vertebrae (107 to 110) than the Japanese quail. There are stellate melanocytes on the iliac crest of the Philippines. Others are Japanese cockroaches.
Second, look at the activities of the situation in Japan, the Japanese cymbals are quickly made around, up and down bending and beating, fasting together soon after eating together. Up to 2 grams or so, a melanin ring appears at the end of the caudal peduncle; the European cockroach can only be bent in the palm of the right and left, and the head moves up like a snake. Eating less than Japanese crickets have vitality, slow growth, heat-fighting, easily dying above 27°C; American quails are similar to Japanese crickets; Australian crickets have strong eating habits; they are bulimia like grass carp, easily bloated, and have low survival rate; China has not yet started farming.
3. Look at the reaction in the butene solution. The Japanese cockroach will not die in 0.4 ppm butene solution for more than one hour. Other varieties of seedlings die within one hour.
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