the calling behavior of virgin carob moth females, ectomyelois ceratoniae (zeller) (lep.: pyralidae) was evaluated under two different thermal regimes, cycling and constant temperatures under laboratory condition. the period of calling activity under cycling temperature was prolonged and the total period of calling activity of an individual female was increased. although moths maintained under ...

Amount of calling activity (calling effort) is a strong determinant of male mating success in species such as orthopterans and anurans that use acoustic communication in the context of mating behaviour. While many studies in crickets have investigated the determinants of calling effort, patterns of variability in male calling effort in natural choruses remain largely unexplored. Within-individu...

The factors contributing to the termination of calling (pheromone release) in adult female Supellu longipalpa were examined. Calling ceases after mating and does not resume over the duration of the insect’s life. Calling was suppressed and basal oiicyte growth was stimulated by the transient presence of a sperrnatophore, by the implantation of an artificial spermatophore, and by mating with vas...

We investigated the effects of different doses (0, 2.5, 25 and 250 µg) of the neuropeptide arginine vasotocin (AVT) on the calling characteristics of the grey treefrog in a chorus in its natural habitat. AVT changed some call characteristics known to influence social behaviour in grey treefrogs. It increased call duration and number of pulses in a call, but not dominant frequency, call rate or ...

Primates give alarm calls in response to the presence of predators. In some species, such as the Thomas langur (Presbytis thomasi), males only emit alarm calls if there is an audience. An unanswered question is whether the audience's behaviour influences how long the male will continue his alarm calling. We tested three hypotheses that might explain the alarm calling duration of male Thomas lan...

Crocidosema aporema (Walsingham) is a major pest of legumes in the southern cone of Latin America. The mating behaviour of two allopatric populations (Uruguay and Brazil) of C. aporema kept in captivity was studied by observing the posture of calling females, the temporal pattern of pheromone emission and mating, and the response of males to calling females in olfactometer tests. Female calling...

Arginine vasotocin (AVT), a neuropeptide, appears to influence mating and aggressive behaviours of males classically thought to be controlled by testosterone. We examined the effects of AVT on the calling behaviour and competitive ability of the grey treefrog Hyla versicolor under natural field conditions. AVT increased the probability that males produced advertisement calls from a resident's c...

Alarm calling in sciurid rodents is often explained by inclusive fitness benefits that callers accrue. Inclusive fitness arguments imply that indirect fitness plays an important role in the evolution and maintenance of alarm calling. A more parsimonious hypothesis is that animals alarm call to increase their direct fitness by warning their offspring. Group-living animals are related to each oth...