Claw Waving for Sex: An Inquiry-Based Lab to Teach Sexual Dimorphism and Behavior in Fiddler Crabs

Abstract

We designed a three-week guided inquiry-based lab for non-biology majors revolving around the ideas of sexual dimorphism, selection, and behavior, using fiddler crabs (Uca pugilator) as a model. Specifically, students worked in small teams to design experiments, collect data, and present findings in a short oral presentation. Students gained exposure to scientific skills, including designing an ethogram, understanding the purpose of inter-observer reliability, graphing, statistics, and oral communication.