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Filtering by: Subject Columbia River Gorge (Or. and Wash.) Advisor Roby, Daniel D. Creator Bailey, Olivia A.

Extrinsic and Intrinsic Factors Associated with Reproductive Success of Caspian Terns (Hydroprogne caspia) at East Sand Island, Columbia River Estuary

Creator:

Bailey, Olivia A.

Abstract:

Declines in wild salmonid (Oncorhynchus spp.) populations in the Columbia River basin have resulted in managers identifying that avian predation on juvenile salmonids is an important limiting factor for salmonid recovery. Caspian Terns (Hydroprogne caspia), particularly those nesting in the Columbia River estuary, were identified as key avian predators that...

Resource Type:

Masters Thesis

Full Text:

on tern eggs and chicks. The impact of average Columbia River discharge in May/June as a driving