Brain size, gut size and cognitive abilities: the energy trade-offs tested in artificial selection experiment

Marek Konarzewski, Anna Goncerzewicz, Tomasz Górkiewicz, Jakub M. Dzik & Ewelina Knapska
The enlarged brains of homeotherms bring behavioural advantages, but also incur high energy expenditures. The ‘Expensive Brain’ (EB) hypothesis posits that the energetic costs of the enlarged brain and the resulting increased cognitive abilities (CA) were met either by increased energy turnover or reduced allocation to other expensive organs, such as the gut. We tested the EB hypothesis by analyzing correlated responses to selection in an experimental evolution model system, which comprises line types of...
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