Wood lemming sex ratio, 1967-1970, Finland

Data package contains infomation on wood lemmings reared in captivity, in 1967-1970. Captive wood lemmings (Myopus schisticolor) were reared in captivity, and sex-ratio was calculated for each litter. Wood lemmings originated from Eastern Finland, and they were reared in Helsinki, S-Finland. A total of 218 couples of wood lemmings with different origin were mated and they produced 602 offspring, of which 67,5% were female.