Fieldwork Rat: Rattus catchus ifyoucanus Catching rats…. …is not as easy as it sounds!
But even worse… …there are some unwanted side effects…
So we asked DoC to catch some rats for us instead.
500 rats caught in total! Norway rats hold the islands Some ship rats and kiore on the islands Ship rats hold the mainland DNA from 300 Norway rats sent to the lab
DNA from 80 ship rats sent to the lab These ship rats on Urupukapuka are new since the 1980s
Months of work for Hamish MacInnes, our lab scientist, to test the genetics of nearly 400 rats We use the same lab techniques as the police use to solve murders with DNA evidence
What do genetic results look like? We’ll use an example from Aotea, Great Barrier Island...
Fitzroy Motu Kaikoura Fitzroy region, Great Barrier Island
Fitzroy Motu Kaikoura Fitzroy region, Great Barrier Island Genetic results Each point is one rat; Each colour is a different island Look for: Overlap: closely related populations Separation: isolated populations