Re: Digest Number 573
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Regarding DNA analysis to determine sub-species: There are several DNA investigations going on using diamondback terrapins, perhaps because there are relatively large numbers from discreet sub-populations available for providing material. For two years, I have provided animals to be sampled for analysis. This year is the first I will have maternal and clutch samples. Most of these studies are under the U S Geological Survey, Biological Resources Division. The lead geneticist indicated there are no genetic distinctions recorded for sub-species as this appears to be a hugely debated issue and of little consequence to most of the research currently underway. I know of few who could examine a terrapin out of its natural range and tell what sub-species it is and unless this person knew the genealogy of the terrapin, I would be suspect. Identification of sub-species is highly subjective for animals out of their range as the distinctions are primarily clinal adaptations. Perhaps as more captive animals reproduce under known paternity these animals could lend a great deal to science and perhaps then the sub-species could be genetically authenticated. Current techniques require only a small blood sample, animals are not stressed. mw
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