Friday, January 30, 2015

Guppy videos

Here are some high-speed videos I have taken recently of guppies feeding on two prey types: relatively easy to catch brine shrimp nauplii, and very difficult to catch freshwater copepods.  The copepod trial just happened today, and I am excited that I have found an evasive prey to challenge these guppies.  Since I want to look at differences between populations, I need a prey that's going to make them work.  Otherwise, those differences might be hard to find.

Without further ado...
A guppy capturing brine shrimp:

and a guppy capturing (or rather not capturing!) a copepod:

**All procedures were approved by the Institutional Animal Care and Use Committee at Colorado State University**

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