Main Page | See live article | Alphabetical index 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 External link http://www.slowcoach.org.uk/care/jackson/jackson.html This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.