Cichlids are a diverse group of fish that are known for their prenatal and postnatal care of their eggs and frys (baby fish). This unique characteristic creates a limitation on the amount of eggs a cichlid can lay and protect, which is particulalry effected by the size of the eggs. Cichlids have a large variance in their egg size, which correlates to a large variance in their fry size. This project explores the trade offs cichlids make in egg size and fry size by specifically testing the ability of varying sized cichlids to swim in different flow rates. This could create a better understanding of cichlid evolution, particularly in the natural selection of characteristics based on their individual environments. This research project attempts to monitor the ability of a cichlid to swim in a flow inside a recirculating tank.


Evolution | Hydraulic Engineering | Other Ecology and Evolutionary Biology


Ron Coleman

Lab site

California State University, Sacramento (Sac State)

Funding Acknowledgement

The 2019 STEM Teacher and Researcher Program and this project have been made possible through support from Chevron (www.chevron.com), the National Science Foundation through the Robert Noyce Program under Grant #1836335 and 1340110, the California State University Office of the Chancellor, and California Polytechnic State University in partnership with CSU Sacramento. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the funders.



URL: https://digitalcommons.calpoly.edu/star/571


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