A standardized breeding study of gray red-backed voles(Myodes rufocanus)in the laboratory / 中国实验动物学报

Objective To establish a breeding method ofMyodes rufocanus in the laboratory,collect their growth and reproduction data,and provide a basis for carrying out the experimental animalization.Methods Wild Myodes rufocanus caught in the Moranbong woodland were brought back to the laboratory.They were bred artificially in a large hard wall rodent negative pressure isolator.Their growth and reproduction data were recorded for evaluating the results of breeding.Results The Myodes rufocanus were successfully bred in the laboratory.The pregnancy rate was 54.55%.The average pregnancy length was 20.4 days(8 to 22 days).During one breeding period,they gave birth 2.9 times on average.The maximum number of births was 7 times,far more than the number tested under field conditions.The average litter size was 4.3±1.22.The highest litter number of a single nest was 8.The weaning rate of pups was 94.8%.The growth and development of pups were good.Conclusions The breeding method for Myodes rufocanus is established.The growth and reproduction data are tested too.The results of our study laid a foundation for the experimental animalization of Myodes rufocanus.

Brief report of series study on Rongshui miniature pig as laboratory animal / 中国比较医学杂志

The provenances of Rongshui miniature pigs ( RMPs) were purchased from Rongshui, Guangxi, in 2012.130 RMPs were transported to Sanshui, Guangdong,China, which were breed according to the laboratory animal standards.83 RMPs were selected randomly from the first filial generations ( F1 ).The basic data were collected including breed characteristics, reproductive performance, grow curve, hematology, biochemical markers of serum and urine, organ coefficient, Chromosome analysis.According to the national and local standards, the quality control standards of RMP were set up including microbiological, parasitic, environment and facilities, fodder, pathology, genetic.The results showed that RMPs adapt to the climate of Guangdong.The natural mating and conceive rate was 88.3% with the pregnancy of 112 days.The average number of firstborn and still-born was 6.1 and 7.9 respectively.RMP was small body size with the adult body weight of 17.21 ±5.20 kg and 16.35 ±5.23 kg in female and male respectively.RMP was very tame.The mitochondrial genome analysis suggested RMP belonged a typical miniature pig breed in China, which is ancient than Lanyu pig.RMP could be breed as a new kind of laboratory animal.