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LITTER SIZES IN INBRED STRAINS OF RATS (RATTUS NORVEGICUS)
Author(s) -
Gill T. J.,
Kunz H. W.,
Hansen C. T.
Publication year - 1979
Publication title -
international journal of immunogenetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.41
H-Index - 47
eISSN - 1744-313X
pISSN - 1744-3121
DOI - 10.1111/j.1744-313x.1979.tb00701.x
Subject(s) - biology , litter , inbred strain , veterinary medicine , zoology , genetics , ecology , medicine , gene
Summary The average litter sizes and reproductive performance of twenty‐five inbred strains of rats, maintained in a conventional colony in Pittsburgh, and twenty‐six inbred strains, maintained in a barrier facility at the National Institutes of Health, were calculated from data collected for periods of 3 and 10 years, respectively. There were considerable variations in both parameters in each of the two colonies studied. In addition, there were quite wide variations in male to female ratios among inbred strains (0.80 to 1.42).