Griffiths A O, Brenner A
J Am Vet Med Assoc. 1977 Jun 1;170(11):1333-40.
Age, sex, breeding, cost, source, and reproductive data on dog and cat populations were obtained for Champaign County, Illinois. Of 623 households from which completed interviews were obtained, 37.4% had 1 or more dogs, and 17.8% had 1 or more cats. The estimated population of dogs was 22,118 and of cats, 16,055, with a proportion to human population of 1 dog/7.4 persons and 1 cat/9.9 persons. The mean age of cats (2.98 yr) was about two-thirds of the mean age of dogs (4.64 yr); the median age of cats (1.8 yr) was about one-half the median age of dogs (3.7 yr). The most often mentioned origin of dogs was private pet owners; cats were most often reported as being offspring of currently owned cats. The proportion of households owning dogs and cats was higher in rural than in urban areas.
获取了伊利诺伊州尚佩恩县犬猫种群的年龄、性别、繁殖、成本、来源及繁殖数据。在623户完成访谈的家庭中,37.4%养有1只或更多只狗,17.8%养有1只或更多只猫。估计狗的数量为22,118只,猫的数量为16,055只,狗与人的比例为1只狗/7.4人,猫与人的比例为1只猫/9.9人。猫的平均年龄(2.98岁)约为狗平均年龄(4.64岁)的三分之二;猫的中位年龄(1.8岁)约为狗中位年龄(3.7岁)的一半。狗最常被提及的来源是私人宠物主人;猫最常被报告为现有猫的后代。农村地区养狗和养猫的家庭比例高于城市地区。