Ze Frog (rana limnocharis)
Ranidae Rana of one kind. Widely distributed in Japan and Southeast Asia. Distributed in the south of the Qinling Mountains in China plains and hilly areas. Altitude of 2000 meters in the mountains also have distribution. The most commonly seen and number. Commonly known as "bang sound frog", "black frog", "frog earners." The body shape like a small tiger frog, body length of 50 to 55 mm. Semi-webbed toes. More pointed snout, upper and lower lip six to eight black vertical stripes; between the eyes "v"-shaped spots, shoulder generally have "w"-shaped spots, and some have varying width green or pale yellow ridges lined. Back olive gray, dark gray or tan, some mixed with red ocher, dark green spots; no dorsal fold, there are many scattered arrangement of varying lengths longitudinal skin edges. There are gray and black males outside the vocal sac single swallow, song loud, living in the rice fields, swamps, near the vegetable garden.
At high latitudes, autumn hibernation, after four moonrise sting spawning period can be extended to September. In the south, a female frog with an annual output of 2 to 3 batches of eggs. Most eggs in shallow water layer hydrostatic domain, generally sink to the bottom. When spawning, the male and female to hold limnocharis dive head first, anal only exposed on the surface of the water. Discharged after 20 to 70 eggs, males with a foot pedal suddenly the eggs from anal. Such actions generally continuous spawning 6-7 times. Small eggs, egg diameter of about 1 mm. Back tadpole olive green, tan pits, thin tail, tapering ends, the upper and lower edge of the caudal fin has several short black horizontal stripes. Eggs and tadpoles adaptability, the water temperature at 40 ℃ still normal development, and fast. Generally 35 to 45 days to complete metamorphosis, some completed in three weeks. Limnocharis mainly harmful insects, and thus the elimination of agricultural pests play a positive role. However, sometimes a small amount of beneficial predatory animals.
Limnocharis major rice producing areas of the Yangtze River was originally longest see frogs in recent years, due to changes in the method of rice cultivation in the region, the widespread use of herbicides, pesticides, coupled with a large area of water pollution and other reasons, the number of lead limnocharis drastically reduced, it should attract attention and concern. |
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