Data from: When do trade-offs occur? The roles of energy constraints and trait flexibility in a bushcricket

Flavia Barbosa, Darren Rebar & Michael D. Greenfield
In many animal species, the expression of sexually-selected traits is negatively correlated with survival traits such as immune function, a relationship termed a ‘trade-off’. But an alternative in which sexually-selected traits are positively correlated with survival traits is also widespread. The nature of inter-trait relationships may be largely determined by overall energy expenditure, energy availability, and trait flexibility, with trade-offs expected when individuals are subject to energy constraints. We tested this hypothesis in Ephippiger diurnus,...
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