Joshua Goldberg successfully defended his PhD yesterday - Thursday, October 10. His thesis title is: "Population, spatial and temporal structure in the development of a stream community". It was a series of studies of the interaction between guppies and the killifish, Rivulus hartii as guppies invade a headwater stream where killifish were the only prior resident. The three chapters were: 1) artificial stream experiments that detailed the nature of their interaction, 2) mark-recapture studies of killifish where guppies were introduced, in comparison with an upstream control from which guppies had been excluded by a barrrier waterfall, and 3) how these interactions "matured" over time in longer term introduction experiments (30+ years) and natural communities with both species present.
It was a great presentation. We are all very proud of him and happy with the outcome.
Joshua will soon return to Bhutan to study tigers and leopards!
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