Magellanic penguins

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

Metadata Authors: Dr. Ginger Rebstock and Dr. P Dee BoersmaJournal: Marine Ecology Press SeriesDOI: https://doi.org/10.3354/meps14476 Summary Summary written by Sofia Denkovski Protecting Migratory Species Sexual Segregation of Magellanic Penguins Effects of sex-biased distribution on females What does this tell us?

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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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Changing course: Relocating commercial tanker lanes significantly reduces threat of chronic oiling for a top marine predator

Metadata Authors: Eric L. Wagner, Esteban Frere, P. Dee BoersmaJournal: Marine Pollution BulletinDOI: 10.1016/j.marpolbul.2023.11 Summary Summary written by Sofia Denkovski Argentinian oil and effects on seabirds Surveys from 1982-1990 suggested more than 40,000 penguins died per year in Chubut and Santa Cruz from chronic oiling. This was hypothesized to be due to the colonies’ proximity to oil centers and shipping lanes. Why is oil so bad for birds? Oiled birds lose their ability to thermoregulate and can ingest the toxic oil. Penguins are especially vulnerable due to remote breeding sites and inability to fly. Changes after establishment of 1997 marine

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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…

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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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