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• W4313703388 abstract "Abstract Animals of many different species, trophic levels, and life history strategies migrate, and the improvement of animal tracking technology allows ecologists to collect increasing amounts of detailed data on these movements. Understanding when animals migrate is important for managing their populations, but is still difficult despite modelling advancements. We designed a model that parametrically estimates the timing of migration from animal tracking data. Our model identifies the beginning and end of migratory movements as signaled by changes in step length and turning angle distributions. To this end, we can also use the model to estimate how an animal’s movement changes when it begins migrating. We tested our model on three datasets: migratory ferruginous hawks ( Buteo regalis ) in the Great Plains and barren-ground caribou ( Rangifer tarandus groenlandicus ) in northern Canada, and non-migratory brown bears ( Ursus arctos ) from the Canadian Arctic. We estimated the beginning and end of migration in caribou and hawks to the nearest day, while confirming a lack of migratory behaviour in the brown bear population. The flexibility of our modelling framework allowed us to assess intricacies associated with each dataset: long-term stopover behaviour in ferruginous hawks and a priori knowledge of caribou calving areas and behaviour. In addition to estimating when caribou and ferruginous hawks migrated, our model also identified differences in how the two populations migrated; ferruginous hawks achieved efficient migrations by increasing their movement rates while caribou migration was achieved through significant increases in directional persistence. Our approach is broadly applicable to many animal movement studies. We anticipate that rigorous assessment of migration metrics will aid understanding of both how and why animals move." @default.
• W4313703388 created "2023-01-08" @default.
• W4313703388 creator A5013036828 @default.
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• W4313703388 date "2023-01-06" @default.
• W4313703388 modified "2023-09-27" @default.
• W4313703388 title "A parametric model for estimating the timing and intensity of animal migration" @default.
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• W4313703388 doi "https://doi.org/10.1101/2023.01.05.522924" @default.
• W4313703388 hasPublicationYear "2023" @default.
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