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Biologists are becoming increasingly aware of sex-based differences in ecologically important traits (locomotor performance, feeding morphology, thermoregulatory behavior). Yet, the overwhelming majority of these studies have been performed on vertebrates, despite often striking examples of sexual size dimorphism among the insects. Here, I tested whether adult male and female Eastern lubber grasshoppers...
Theoretical models predict that modalities of prey detection depend upon foraging modes: ambush foragers will rely on visual cues to launch a strike whereas active searchers will use chemical cues to locate prey. Testing this prediction is hampered by phylogenetic conservatism; ideally, we need to compare closely related animals that differ in foraging mode. Aquatic filesnakes from tropical Australia...
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