Something’s Fishy in Paxton Lakeby: Joan Sharp

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In this case study exploring the mechanisms of speciation, students work in groups to design a series of experiments to determine whether two populations of sticklebacks in Paxton Lake in British Columbia represent separate species. Students consider the biological species concept when interpreting their field data, which the instructor provides to students in the form of data sheets.

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  • on Fri Jan 02, 2015 2:40 PM

This case study demonstrates to students that speciation is an on-going process today as it has been in the past. This particular example is mentioned in the NOVA program What Darwin Never Knew, so this would be a good activity to do with students prior to showing all or a portion of this video about how our knowledge of evolution has expanded and evolved over time. I would do this with either high school or undergraduate biology or environmental science classes.

Tina Harris  (Fairmount, IN)
Tina Harris (Fairmount, IN)

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