You Are Studying 20 Lake Populations of the Three-Spined Stickleback

question 26

Essay

You are studying 20 lake populations of the three-spined stickleback. In each lake, there are two distinct morphs that specialize on feeding in different areas of the lake. The benthic morph feeds around the shoreline, while the limnetic morph feeds in the open water. The environments and food sources in these environments are quite different. You hypothesize that these morphs are diverging into two different species in accordance with the ecological speciation model. Please describe an experiment that would allow you to test this hypothesis. Be sure to include what results would support and refute the ecological speciation hypothesis.

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