Key Laboratory of Prataculture and Grassland Resources of Education Ministry

Hohhot, China

Key Laboratory of Prataculture and Grassland Resources of Education Ministry

Hohhot, China

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Fu H.,Inner Mongolia Agricultural University | Fu H.,China Agricultural University | Fu H.,Key Laboratory of Prataculture and Grassland Resources of Education Ministry | Zhang J.,China Agricultural University | And 8 more authors.
Acta Theriologica Sinica | Year: 2011

Mongolian gerbils {Meriones unguiculatus) are widely distributed in Inner Mongolia. This species not only has caused damage to grassland or crop production, but has also been a channel for transmitting human plagues in the abovementioned region. From March to October in 2009, we used a contraceptive compound ( EP-1 ) to test its fertility control effect on a wild population of Mongolian gerbils in the Ordos Desert Grasslands, Inner Mongolia. The results show that the breeding, structures and densities of Mongolian gerbil populations were significantly influenced by EP-1. During the first of the two peak breeding periods for gerbil populations, from May to June, juvenile recruitment significantly declined. The proportions of juveniles and of adults fluctuated significantly in the experiment and check areas (P<0.01). Similar fluctuations were seen in August to October in both areas (P<0.05, P<0.01). In the EP-1 treatment area, juvenile recruit-ment began in June, reached its peak in September, and their population density declined during the population growth period. In the control area, the juvenile recruitment peaked in May, and their population density showed an increase during the breeding period. In summary, reproduction, juvenile recruitment, the proportion of juveniles, and the population densities of Mongolia gerbils were significantly reduced during reproductive periods. These observations suggest that EP-1 is a very effective contraceptive for fertility control of this wild species, and may reduce the risk of damage to grass or crop production as well as the spreading of human plagues.


Fu H.,China Agricultural University | Fu H.,Inner Mongolia Agricultural University | Fu H.,Key Laboratory of Prataculture and Grassland Resources of Education Ministry | Zhang J.,China Agricultural University | And 3 more authors.
Integrative Zoology | Year: 2013

Rodent pest population outbreaks occur frequently in grassland ecosystems in northern China. The Mongolian gerbil (Meriones unguiculatus) is a dominant pest rodent which is distributed across the semi-desert grasslands of Inner Mongolia, China. In 2009, we studied the contraceptive effect of levonorgestrel-quinestrol (EP-1), concentration 50 ppm, on a wild Mongolian gerbil population. The one-off contraceptive treatment was compared with a control group using a semi-monthly live trapping method in the Ordos Semi-desert Grassland Region of Inner Mongolia. The results show that juveniles were not recruited in spring in the treatment group. Ratios of juveniles in the control and treatment groups showed significant semi-monthly differences from spring to summer (one-way ANOVA, F2, 14= 7.53, P < 0.05). Between both groups, annual fluctuations of juvenile and total population densities were significantly different respectively (F2, 14= 4.64, P < 0.05; F2, 18= 7.72, P < 0.05). The contraceptive EP-1 delayed the normal reproductive pattern of Mongolian gerbil populations. This suppressed birth rates of gerbil populations, reduced their densities, and changed their age structures. The period of EP-1 baiting should be extended but it could be an ideal method for controlling Mongolian gerbil populations during each breeding season. © 2012 Wiley Publishing Asia Pty Ltd, ISZS and IOZ/CAS.

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