Dear Colleagues, My co-authors and I are pleased to announce the publication of our paper in Phil. Trans. R. Soc. B:
Zandberg L, Lachlan RF, Lamoni L, Garland EC. 2021 Global cultural evolutionary model of humpback whale song. Phil. Trans. R. Soc. B 376: 20200242. Humpback whale song is an extraordinary example of vocal cultural behaviour. In northern populations, the complex songs show long-lasting traditions that slowly evolve, while in the South Pacific, periodic revolutions occur when songs are adopted from neighbouring populations and rapidly spread. In this species, vocal learning cannot be studied in the laboratory, learning is instead inferred from the songs’ complexity and patterns of transmission. Here, we used individual-based cultural evolutionary simulations of the entire Southern and Northern Hemisphere humpback whale populations to formalize this process of inference. We modelled processes of song mutation and patterns of contact among populations and compared our model with patterns of song theme sharing measured in South Pacific populations. Low levels of mutation in combination with rare population interactions were sufficient to closely fit the pattern of diversity in the South Pacific, including the distinctive pattern of west-to-east revolutions. Interestingly, the same learning parameters that gave rise to revolutions in the Southern Hemisphere simulations gave rise to evolutionary patterns of cultural evolution in the Northern Hemisphere populations. Our study demonstrates how cultural evolutionary approaches can be used to make inferences about the learning processes underlying cultural transmission and how they might generate emergent population-level processes. This article is part of the theme issue ‘Vocal learning in animals and humans’. The paper is freely available here: https://doi.org/10.1098/rstb.2020.0242 If you have any questions, please feel free to contact Lies Zandberg ([email protected]<mailto:[email protected]>) or myself ([email protected]<mailto:[email protected]>). Kind regards, Ellen ----------------------------------------------------- Ellen C. Garland, Ph.D. Royal Society University Research Fellow Member RSE Young Academy of Scotland Sea Mammal Research Unit (SMRU) Scottish Oceans Institute School of Biology University of St Andrews Fife, KY16 8LB, UK Ph: +44 (0)1334-46-3620 Ph: +44 (0)7478-649964 Email: [email protected]<mailto:[email protected]> WWW: https://www.st-andrews.ac.uk/biology/people/ecg5 Twitter: @EllenGarland4 ----------------------------------------------------- The University of St Andrews is a charity registered in Scotland: No SC013532
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