Magellanic penguins

In Press: Sex-specific migratory behavior in a marine predator results in higher risks to females

Authors: Dr. Ginger Rebstock and Dr. P Dee BoersmaJournal: Marine Ecology Press SeriesDOI: https://doi.org/10.3354/meps14476 Protecting migratory species requires knowledge of their distributions throughout the year. Spatial or temporal segregation of females and males during part of the annual cycle complicates conservation measures and can lead to sex-biased mortality…

Field updates: Argentina, September 2023

Written by Dr. Dee Boersma The ongoing pinniped (seals and walruses) die-off on Peninsula Valdés is catastrophic. Our contacts in Argentina–two local veterinarians (Marci Uhart and Ralph Vanstreels), and Claudia Campagna of WCS–tell us that hundreds and potentially thousands of sea lions and elephant seals have died. Avian flu (more widely known as bird flu) has devastated seabird populations throughout the world, but this is the first time it has reached Chile and Argentina. Over a million chickens were killed just in Peru to try and stop its spread. A few sea lions and one elephant seal tested positive for …

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Climate presses and pulses mediate the decline of a migratory predator

Authors: T. J. Clark-Wolf, P. Dee Boersma, Ginger A. Rebstock, and Briana AbrahmsJournal: Proceedings of the National Academy of SciencesDOI: 10.1073/pnas.2209821120 Long-term climate changes and extreme climate events differentially impact animal populations, yet whether and why these processes may act synergistically or antagonistically remains unknown…

Should I stay or should I go: factors influencing mate retention and divorce in a colonial seabird

Authors: Eric L. Wagner, Caroline D. Cappello, P. Dee BoersmaJournal: Animal BehaviourDOI: 10.1016/j.anbehav.2022.08.002 Divorce among serially monogamous birds can lead to increased reproductive success if an individual obtains a higher-quality mate or nest site, or it can lead to lower reproductive success due to lack of pair experience or reduced breeding opportunities…

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