Abstract
Multiple cues are often used for mate choice in complex environments,
potentially entailing mismatches between different sources of
information. We address the consequences thereof for receivers using the
spider mite Tetranychus urticae, in which virgin females are highly
valuable mates compared to mated females, given first male sperm
precedence. Accordingly, males prefer virgins and distinguish them using
cues from the females and/or that are present on the substrate. Whereas
the former are more reliable, the latter may allow for a faster or more
long-distance response. However, there can be mismatched information
between cues as females move and/or mate. Here, we tested the
consequences thereof by exposing males to mated or virgin females on
patches previously impregnated with cues deposited by females of either
mating status. Male mating attempts were solely affected by substrate
cues while female acceptance and the number of mating events were
independently affected by both cues. Copulation duration, in contrast,
depended mainly on the mating status of the female, with the number of
copulations and the total time spent mating being intermediate in
environments with mismatched information. Ultimately, male survival
costs mirrored male investment in mating. These results suggest that, in
environments with mismatched information, the substrate cues left by
females are instrumental for males to find their mates, but they can
also lead to males paying survival costs without the associated benefit
of mating effectively, or suffering reduced costs at the expense of
losing effective mating opportunities. The benefit of using multiple
cues will then hinge upon the frequency of information mismatch, which
itself should vary with the dynamics of populations.