Rodents were great gerbil
Rodent species of rhombomys opimus lichtenstein
Rodent alias yellow mice
Morphological features in the shape of a large gerbil subfamily type, size, and Rattus norvegicus similar to the body grow at 150 mm. Tail close to the body length; tail thick, dense hair is. Shorter ears small, less than half of hind foot; auricular hair growth front row. Inner ear alone before the top is a short-haired than 40 (toe), thumb (toe) is not obvious, the hind toe; bare palm forelimb, hind toe is dense hair. Females nipple 四 right. Head and back, central light yellow sand; side of the body around the eyes, cheeks and ears light coat over the back; back gray hair base and tip yellow sand mixed with small amount of dark brown hair; abdomen and limbs inside the hair are dirty white stick yellow, base dark gray hair, Tippy dirty white; tail hair, down rust red, bright hair over the back, tail end of a long black hair, hairs formed beam. Strong and sharp claws to dark black. Solid thick skull, blunt snout short, during the first enlargement; nasal strip, the length of the skull length of 1 / 3; frontal grew up, the central slightly concave surface, a supraorbital crest; parietal bone is short, flat flat, with a clear the temporal ridge, this ridge of bone at the top between the sides off, between the approximate oval top; cheekbones suddenly nothing more than central. Hearing before the bubble and the external scale is not in contact with bone zygomatic process. Perforations narrow door, but was not up to the first molars front edge of each door has two vertical front tooth groove, outside a deep, inside a shallow; adult molars does not have roots, relatively flat on the chewing surfaces of molars, second molar teeth have two rings, inside and outside of the third molars close to the central office have a shallow depression, the tooth is divided into a posterior lobe. Jaw structure and upper molars are similar, but the third molars only leaf.
Ecological characteristics of habitat in the desert and semi-desert, especially the growth of Haloxylon, white prickly semi-desert habitats of many. The underground mining tunnel, and feed on the ground plants, transformation of the desert and sand a great impact. Pirates of food grain in rural areas, destruction of irrigation facilities, causing serious food losses and soil erosion, but it is also a variety of pathogens in the natural foci of disease carriers.
Distribution in the province located in Minqin, Yongchang, Shandan, Zhangye, Jinta, Jiuquan, Jiayuguan, Yumen, Anxi, Subei; domestic distribution in Inner Mongolia, Ningxia and Xinjiang; foreign located in the former Soviet Union, Iran, Afghanistan , Mongolia.
Control methods in the grasslands of high-density conditions, can be taken 30 m spacing strip of zinc phosphide, and the enemy put in sodium and other acute or chronic rat shell grain bait. In rural areas can take the best comprehensive prevention approach: first, catching mice in the spring to launch a campaign to reduce the basis of the number of rats; pre-harvest rodent with a second drug; harvest when the fast pull Fighter, net in the valley picking ear; destroy the habitat of the adjoining premises to gerbils. In addition, winter irrigation, and deep plowing, etc. can receive good effect. |