Featured New Research

photo of Dr. Gustavo Betini in the lab

Evolutionary trade-off causes multigenerational population cycles

Many wild populations undergo seasonality where they cycle between peaks of high and low numbers across several generations. 

Research from four members of the Department of Integrative Biology, Dr. Gustavo S. Betini, Dr. Andrew McAdam, Dr. Cortland Griswold, and Dr. Ryan Norris provides empirical and mathematical evidence that seasonality caused by density-dependence and evolutionary trade-offs may be driving these population cycles.

zebrafish embryo

Anoxia during a 4-hour window can lead to dominant and aggressive behaviour in zebrafish

Earlier research had shown that zebrafish embryos could survive hypoxia (low oxygen) and even anoxia (complete absence of oxygen) during the first 24 hours which is quite a feat.

This piqued the interest of Prof. Nick Bernier and his students, Catie Ivy and Cayleigh Robertson who are now both PhD students at McMaster University under Profs. Graham Scott and Grant McClelland, respectively.

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