Researched and devised by Oliphant Jackson[?], MRCVS, the Jackson Ratio is a method of determining whether a tortoise, or a member of another chelonia species, is maintaining its optimum bodyweight, which is necessary for a successful hibernation
... living together, 5.6% have a female householder with no husband present, and 37.7% are non-families. 30.9% of all households are made up of individuals and 18.1% hav ...