Bullfrog is an aquatic animal of Ranidae and Ranidae, named after Niu Jiao. Bullfrog is huge, the female frog is 20 cm long, the male frog is 18 cm, and the largest individual can reach more than 2 kg. The head is wide and flat, the mouth is in position, the kiss is pointed and round, and the eyeball is prominent, which is divided into upper and lower parts. The lower eyelid has a foldable instantaneous membrane, which can close eyes and make the back slightly rough.
It has fine skin edges, thick limbs, short forelimbs and no webbed limbs. It is a large edible frog with tender meat, delicious taste, rich nutrition and certain medicinal value. Originated in North America, it has spread all over the world and is the main breeding variety of edible frogs everywhere.
June 29th 1962 Xinhua News Agency reported that a batch of (200 pairs of ***400) large-scale edible bullfrogs donated by the Cuban government to the China government were transported to Guangdong, Jiangsu and Shanghai by breeding units for breeding. In 1980s, people introduced Fujian from Taiwan Province Province, China, developed and expanded, and began to popularize it in China.
Since 1980s, China's bullfrog industry can be roughly divided into three stages: the initial stage led by Taiwan-funded enterprises and large enterprises, the transformation stage led by small and medium-sized enterprises, and the vigorous development stage driven by consumption. Since 1990s, bullfrog has become one of the most important and distinctive aquatic products in China's aquaculture industry.
morphological character
The body of bullfrog consists of three parts: head, trunk and limbs. The head is flat, wide and triangular. The eyes are located at the highest part of the head, oval, yellow eyeball, blink membrane, upper and lower eyelids, which can be opened and closed, and the eyes can look back, forth, left and right. The nostrils are located on both sides of the midline of the head and communicate with the mouth. There is 1 pair of eardrums behind the eyes, which is the auditory organ of bullfrog.
Four toes on the forelimbs and five toes on the hind limbs. The hind limbs are about 2.5 times longer than the forelimbs, and they are strong and strong, which is very suitable for jumping on land. The hind limbs have webbed toes, which is suitable for swimming in water and amphibious life. The male frog has an enlarged black sarcoma on the inside of the first finger of the forelimb, which is called a marriage tumor, but the female frog does not have this structure. The thigh and gaskin of bullfrog hind limbs are the most developed muscles and the main edible parts.