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Title: Evolutionary history, genomic adaptation to toxic diet, and extinction of the carolina Parakeet
Author: Gelabert, Pere
Sandoval Velasco, Marcela
Serres, Aitor
de Manuel, Marc
Renom, Pere
Margaryan, Ashot
Stiller, Josefin
Dios, Toni de
Fang, Qi
Feng, Shaohong
Mañosa, Santi
Pacheco, George
Ferrando Bernal, Manuel
Shi, Guolin
Hao, Fei
Chen, Xianqing
Petersen, Bent
Olsen, Remi André
Navarro i Cuartiellas, Arcadi, 1969-
Deng, Yuan
Dalen, Love
Marquès i Bonet, Tomàs, 1975-
Zhang, Guojie
Antunes, Agostinho
Gilbert, M. Thomas P.
Lalueza Fox, Carles, 1965-
Keywords: Lloros
Extinció (Biologia)
Extintion (Biology)
Issue Date: 9-Dec-2019
Publisher: Elsevier
Abstract: As the only endemic neotropical parrot to have recently lived in the northern hemisphere, the Carolina parakeet (Conuropsis carolinensis) was an iconic North American bird. The last surviving specimen died in the Cincinnati Zoo in 1918 [1]. The cause of its extinction remains contentious: besides excessive mortality associated to habitat destruction and active hunting, their survival could have been negatively affected by its range having become increasingly patchy [2] or by the exposure to poultry pathogens. In addition, the Carolina parakeet showed a predilectionfor cockleburs,an herbaceousplant that contains a powerful toxin, carboxyatractyloside, or CAT, which did not seem to affect them but made the birds notoriously toxic to most predators. To explore thedemographic history of this bird,wegenerated the complete genomic sequence of a preserved specimen held in a private collection in Espinelves (Girona, Spain), as well as of a close extant relative, Aratinga solstitialis. We identified two non-synonymous genetic changes in two highly conserved proteins known to interact with CAT that could underlie a specific dietary adaptation to this toxin.Our genomic analyses did not reveal evidence of a dramatic past demographic decline in the Carolina parakeet; also, its genome did not exhibit the long runs of homozygosity that are signals of recent inbreeding and are typically found in endangered species. As such, our results suggest its extinction was an abrupt process and thus likely solely attributable to human causes.
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It is part of: Current Biology, 2019, vol. 30, num. 1, p. 108-114
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ISSN: 0960-9822
Appears in Collections:Publicacions de projectes de recerca finançats per la UE
Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)

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