[MARMAM] NEW PUBLICATION: Integrating genetic, environmental and social networks to reveal transmission pathways of a dolphin foraging innovation

Wild, Sonja swild at ab.mpg.de
Thu Jun 25 08:50:07 PDT 2020


Dear MARMAM colleagues,

We are pleased to announce the publication of the following paper in Current Biology:


Sonja Wild, William J.E. Hoppitt, Simon J. Allen, Michael Krützen. Integrating genetic, environmental and social networks to reveal transmission pathways of a dolphin foraging innovation. Current Biology. 25 June 2020. DOI: 10.1016/j.cub.2020.05.069<https://doi.org/10.1016/j.cub.2019.02.047>



Summary:

Cultural behavior, that transmitted among conspecifics through social learning [1], is found across various taxa [2–6]. Vertical social transmission from parent to offspring [7] is thought to be adaptive because of the parental generation being more skilled than maturing individuals. It is found throughout the animal kingdom, particularly in species with prolonged parental care e.g. [8,9]. Social learning can also occur among members of the same generation [4,10,11] or between older, non-parental individuals and younger generations [7] via horizontal or oblique transmission, respectively. Extensive work on primate culture has shown that horizontal transmission of foraging behavior is biased toward species with broad cultural repertoires [12], and those with increased levels of social tolerance [13,14], such as great apes. Vertical social transmission has been established as the primary transmission mechanism of foraging behaviors in the Indo-Pacific bottlenose dolphin (Tursiops aduncus) population of Shark Bay, Western Australia [6,9,15,16]. Here, we investigated the spread of another foraging strategy, ‘shelling’ [17], whereby some dolphins in this population feed on prey trapped inside large marine gastropod shells. Using a multi-network version of ‘network-based diffusion analysis’ (NBDA), we show that shelling behavior spreads primarily through non-vertical social transmission. By statistically accounting for both environmental and genetic influences, our findings thus represent the first evidence of non-vertical transmission of a foraging tactic in toothed whales. This research suggests there are multiple transmission pathways of foraging behaviors in dolphins, highlighting the similarities between cetaceans and great apes in the nature of the transmission of cultural behaviors.

The article can be downloaded under:
https://doi.org/10.1016/j.cub.2020.05.069

Video abstract here:
https://www.youtube.com/watch?v=f9nc3-pz7Tc

Want a copy? Have a question? Email me on: swild at ab.mpg.de

Cheers,
Sonja Wild & co-authors



-------------------------------------------------------

Sonja Wild

Postdoctoral Researcher

Centre for the Advanced Study of Collective Behaviour - University of Konstanz

Cognitive and Cultural Ecology Lab - Max Planck Institute of Animal Behavior

website: <https://sites.google.com/view/sonjawild> https://sites.google.com/view/sonjawild

twitter: @wild_sonja<https://twitter.com/wild_sonja>
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