Data from: First evidence of diverging migration and overwintering strategies in glaucous gulls (Larus hyperboreus) from the Canadian Arctic ...

• Main Authors: Baak, Julia E., Patterson, Allison, Gilchrist, H. Grant, Elliott, Kyle H.
• Format: Dataset
• Language: English
• Published: Movebank Data Repository 2021
• Subjects: Larus hyperboreus; animal movement; animal tracking; Arctic; avian migration; geolocator; glaucous gull; gps logger; light-level logger; seabirds; Canada; Coats Island; Nunavut; Okhotsk; Pacific; Climate change; Glaucous Gull; North Atlantic
• Online Access: https://dx.doi.org/10.5441/001/1.tj948m64; https://www.datarepository.movebank.org/handle/10255/move.1386

Many seabird populations differ in their migration strategies, where individuals travel in different directions to separate wintering areas. These migratory strategies may expose individuals to different threats, thus understanding migratory connectivity is crucial to assess risks to populations. Glaucous gulls (Larus hyperboreus) are generalist predators with flexible migratory behaviour that may alter these behaviours in response to climate change and anthropogenic activities, such as access to landfills, yet little is known about their migration. We deployed GPS and GLS tracking devices on glaucous gulls from Coats Island, Nunavut, Canada to obtain the first insights into their migration and habitat use outside of the breeding season. Gulls used two migration strategies during the non-breeding season, where one migrated as far as the Sea of Okhotsk in the Pacific and the remainder (n = 7) wintered in the North Atlantic. Gulls primarily overwintered in pelagic (56%) and coastal (38%) habitats. While in ...