关键词: 猪獾, 种群年龄结构, 种群数量变动.

Abstract: The population ecology of the sand bad ger (Arctonyx collaris) wsa studied from May,1984 to June，1985 in Long County．A total of 108 specimens were obtained, among which 52 were males and 56 females．Taking width of the crista sagittali s as the age criteria (Fi g.1)，the samples were divided into four age groups．
Group 1．Juvenile：The erista saglttalis width of males and females are 30.71 0± 3.650，29.019± 2.625mm respectively．The limits of the age groups are 25.54 and 26.00m m ．
Group 2． subadult：The crista sagittalis width of males and females are 20.699±3.647， 19.643± 3.346mm respectively．The liraits of the age groups are 1 5.53- 25.54, l3.89— 26.001mm ．
Group 3．Adults：The crista sagittalis width of males and females are 10.027±3.181， 8.961±2.947mm respecfvely．The limits of the age groups are 3.15-15.53，5.73-13.89mm.
G roup 4． Senior：The crista sagittalis width of males and females are becoming 2.869± 1.131， 3.005± 0.846mm． The 1imits of the age groups are 1.74-3.15， 1.93-5.73mm ．
It is clear th at the sku1l of the animal shows a gonsiderable range of age varlati-on in age groups 1-3．
The hog-badget population in different age groups varies with di ferent seasons.Peak of nubmer juvenile occurred in June，subaduIt in Apr．，adult in Sep．and senior in May and Nov． The seasonal difference in age distribution of the hog-badger population is obv-ious．The total sex ratio is 52 males to 56 females．There is only one litter in a year from Feb．to May．The average litter size is 4.1 young，varying from two to six．The
yearling young，i．e．，group l are usually sexually inmaturet group 2 are only part′y matuetthe other two gzoups are members in reproduction．

Key words: Sand badger, Arctonyx collaris, Population age struetute, Population dynamics。