Data from: Peregrine Falcons shift mean and variance in provisioning in response to increasing brood demand ...

• Main Authors: McKinnon, Rebekah, Hawkshaw, Kevin, Hedlin, Erik, Nakagawa, Shinichi, Mathot, Kimberley
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Zenodo 2023
• Subjects: Animal behavior; provisioning; raptor; risk-sensitivity; variance-sensitivity; Arctic; Nunavut; Falco peregrinus
• Online Access: https://dx.doi.org/10.5281/zenodo.10035108; https://zenodo.org/doi/10.5281/zenodo.10035108

The hierarchical model of provisioning posits that parents employ a strategic, sequential use of three provisioning tactics as offspring demand increases (e.g., due to increasing brood size and age). Namely, increasing delivery rate (reducing intervals between provisioning visits), expanding provisioned diet breadth, and adopting variance-sensitive provisioning. We evaluated this model in an Arctic breeding population of Peregrine falcons (Falco peregrinus tundrius) by analyzing changes in inter-visit-intervals (IVIs) and residual variance in IVIs across 7 study years. Data was collected using motion-sensitive nest camera images and analyzed using Bayesian mixed effect models. We found strong support for a decrease in IVIs (i.e., increase in delivery rates) between provisioning visits and an increase in residual variance in IVIs with increasing nestling age, consistent with the notion that peregrines shift to variance-prone provisioning strategies with increasing nestling demand. However, support for ... : Funding provided by: Natural Sciences and Engineering Research CouncilCrossref Funder Registry ID: https://ror.org/01h531d29Award Number: Funding provided by: University of AlbertaCrossref Funder Registry ID: https://ror.org/0160cpw27Award Number: Funding provided by: MitacsCrossref Funder Registry ID: https://ror.org/00cjrc276Award Number: Funding provided by: Government of NunavutCrossref Funder Registry ID: https://ror.org/03wf6h922Award Number: Funding provided by: Nunavut General Monitoring PlanCrossref Funder Registry ID: http://dx.doi.org/10.13039/100015878Award Number: ...