The Great Guppy Experiment

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Science  24 Aug 2012:
Vol. 337, Issue 6097, pp. 904-908
DOI: 10.1126/science.337.6097.904

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For the past 4 years, evolutionary biologist David Reznick of the University of California, Riverside, and a cadre of interns and colleagues have trekked up the streams of the headwaters of Trinidad's Guanapo River to follow the lives of guppies. They have learned how fast each fish grows, where it spends its time, and who its descendents are. This intimacy, along with detailed studies of the streams themselves, is helping to reveal the interplay between ecology and evolution in shaping how both a species and its environment change through time. But now that results are starting to come in, the project is running low on money.