MSc Environmental Sciences Thesis Defense: Jenna Cahill

Supervisor: Dr. Pedro Quijon, Biology

Title: Exploring coastal birds in relation to off-bottom oyster aquaculture sites in two productive areas on Prince Edward Island

Abstract: The coastal bays of Prince Edward Island (PEI) support a robust bird population and booming aquaculture industry. Off-bottom oyster aquaculture has been gaining popularity, though relatively little is known about its impact on vulnerable bird species. This project aims to address knowledge gaps in this area, with an emphasis on shorebird foraging behaviour. Monitoring sites with and without aquaculture in two Important bird areas, Malpeque Bay and Orwell Bay, displayed increased bird abundance and diversity within aquaculture sites. Changes in behaviour between aquaculture and non-culture areas highlighted the use of oyster gear as an important resting site for coastal birds. Additionally, there was a correlation between an increase in sediment invertebrates in aquaculture sites and the increase in bird abundance. These results suggest that coastal birds and current levels of off-bottom oyster culture can successfully co-utilize PEI’s nutrient-rich estuaries.