College of William and Mary
Advisor: Jonathan Allen
Estimating Predation Rates in Juvenile Sea Urchins
Three decades ago, the urchin population in the Northern Atlantic experienced a dramatic decrease due to overfishing. In the subsequent decades, reestablishment of a successful urchin population has been difficult. To determine the causes of poor reestablishment, we performed three experiments at Bowdoin’s Coastal Studies Center Marine Lab. The study investigated potential predator-induced causes of poor reestablishment. First, we carried out a flourochrome staining protocol to determine its effects on juvenile urchin growth. Second, we studied the rate of predation of various organisms, including the American lobster and hermit crabs, on juvenile urchins. Third, we released juvenile urchins in a mesocosm, a laboratory replication of field conditions, to determine if mesocosms are a viable method for tracking juvenile survival and growth. As research continues, these data will be used to determine the predators of juvenile urchins, the effects of different juvenile backgrounds on predation, and, consequently, the possible cause of slow urchin population reestablishment.
These presentations are in PechaKucha format. PechaKucha is Japanese for ‘chit-chat’. It is a presentation methodology devised in 2003 in which 20 slides are shown for 20 seconds each. The slides auto advance to keep the presentations concise and quick paced. Each presentation is (about) 6 minutes and 40 seconds long.
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