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• W3146302758 abstract "Novel behaviours can spur evolutionary change and sometimes even precede morphological innovation, but the evolutionary and developmental contexts for their origins can be elusive. One proposed mechanism to generate behavioural innovation is a shift in the developmental timing of gene-expression patterns underlying an ancestral behaviour, or molecular heterochrony. Alternatively, novel suites of gene expression, which could provide new contexts for signalling pathways with conserved behavioural functions, could promote novel behavioural variation. To determine the relative contributions of these alternatives to behavioural innovation, I used a species of spadefoot toad, Spea bombifrons. Based on environmental cues, Spea larvae develop as either of two morphs: 'omnivores' that, like their ancestors, feed on detritus, or 'carnivores' that are predaceous and cannibalistic. Because all anuran larvae undergo a natural transition to obligate carnivory during metamorphosis, it has been proposed that the novel, predaceous behaviour in Spea larvae represents the accelerated activation of gene networks influencing post-metamorphic behaviours. Based on comparisons of brain transcriptional profiles, my results reject widespread heterochrony as a mechanism promoting the expression of predaceous larval behaviour. They instead suggest that the evolution of this trait relied on novel patterns of gene expression that include components of pathways with conserved behavioural functions." @default.
• W3146302758 created "2021-04-13" @default.
• W3146302758 creator A5051282953 @default.
• W3146302758 date "2021-03-31" @default.
• W3146302758 modified "2023-09-24" @default.
• W3146302758 title "Novel brain gene-expression patterns are associated with a novel predaceous behaviour in tadpoles" @default.
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• W3146302758 doi "https://doi.org/10.1098/rspb.2021.0079" @default.
• W3146302758 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8059980" @default.
• W3146302758 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33784864" @default.
• W3146302758 hasPublicationYear "2021" @default.
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