Prior mating success can affect allocation towards future sexual signaling in crickets.
Fitness is often correlated with the expression level of a sexually selected trait. However, sexually selected traits are costly to express such that investment in their expression should be optimised to maximize their overall fitness gains. Social interactions, in the form of successful and unsuccessful matings, may offer males one type of feedback allowing them to gauge how to allocate their resources towards sexual signaling. Here we tested whether adult male black field crickets (Teleogryllus commodus) modify the extent of their calling effort (the sexually selected trait) in response to successful and unsuccessful matings with females. To examine the effect that mating interactions with females have on investment into sexual signaling, we monitored male calling effort after maturation and then provided males with a female at two points within their life, manipulating whether or not males were able to successfully mate each time. Our results demonstrate that males alter their investment towards sexual signaling in response to successful matings, but only if the experience occurs early in their life. Males that mated early decreased their calling effort sooner than males that were denied a mating. Our results demonstrate that social feedback in the form of successful and unsuccessful matings has the potential to alter the effort a male places towards sexual signaling.
Evolution & Ecology Research Centre, School of Biological, Earth & Environmental Sciences, The University of New South Wales , Kensington, Sydney, NSW , Australia.
Rachel
R
Chiswell
Department of Environmental Science, Policy and Management, University of California , Berkeley, CA , USA.
Madeline
M
Girard
Institute for Evolution and Biodiversity, University of Muenster , Muenster , Germany.
Claudia
C
Fricke
Evolution & Ecology Research Centre, School of Biological, Earth & Environmental Sciences, The University of New South Wales , Kensington, Sydney, NSW , Australia.
Michael M
MM
Kasumovic
Condition dependence; Male investment; Sexual selection; Sexual signalling; Social feedback; Teleogryllus commodus