Middlebury

 

Cassidy D'Alioa

Cassidy D'Alioa

The sea lamprey Petromyzon marinus has always been assumed to be an introduced parasite in Lake Champlain, but recent genetic evidence suggests they may be native. Utilizing molecular and population genetic techniques, and the department's DNA sequencer, Cassidy’s data show the likelihood of multiple changes in the sea lamprey population over the past 200 years, with population size rapidly decreasing about 150 years ago, and more recently, expanding.