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23:31 2017 Delta Invasive Species Symposium: Jonathan… 2017 Delta Invasive Species Symposium: Jonathan Rose	2017 Delta Invasive Species Symposium: Jonathan Rose 2017 Delta Invasive Species Symposium held on August 29, 2017 at UC Davis. water samples examinations river delta genetics snakes davis county vertebrates utah wetlands research grass snake reptiles living environment california (state) demographics population and census From ATS Video 0 likes 32 plays 0