01980nas a2200229   4500008004100000022001300041245013000054210006900184260001600253300001400269490000800283520123200291653001801523653001701541653001201558653002001570653002701590100001901617700002401636700002401660856006601684       2017                        eng d  a0003347200aEffects of lifetime exposure to artificial light at night on cricket ( Teleogryllus commodus ) courtship and mating behaviour0 aEffects of lifetime exposure to artificial light at night on cri  cJan-07-2017  a181 - 1880 v1293 a<p>Increasing evidence suggests that key fitness-related behaviours of animals related to courtship and mating may be disrupted by anthropogenic stressors, including artificial light at night (i.e. light produced from anthropogenic sources). Despite its ubiquity in urban habitats, we currently know very little about how artificial night lighting affects the reproductive behaviours of most animals. Our study examined the effects of chronic (lifetime) exposure to one of four ecologically relevant intensities of artificial light at night (0, 1, 10 or 100 lx at night) on courtship and mating behaviours and acoustic sexual signalling in a common nocturnal and crepuscular insect, the Australian black field cricket, Teleogryllus commodus. We found that lifetime exposure to brighter (10e100 lx) artificial light at night affected some aspects of courtship and mating behaviour: it influenced mate choice and mating efficiency in a sex-specific manner, but did not affect the multivariate structure of male courtship calls. Our results suggest that chronic exposure to bright light at night may affect some aspects of mate choice and reproductive behaviour in this common insect, and warrants further study across taxa.</p>
10aanthropogenic10abioacoustics10ainsects10alight pollution10areproductive behaviour1 aBotha, Michael1 aJones, Therésa, M.1 aHopkins, Gareth, R.  uhttp://linkinghub.elsevier.com/retrieve/pii/S000334721730157402246nas a2200217   4500008004100000022001300041245007000054210006700124260001600191300001400207490000700221520159100228653003401819653001701853653001701870653001401887653001601901653002401917100002101941856006601962       2011                        eng d  a0003347200aDo male field crickets, Gryllus pennsylvanicus, signal their age?0 aDo male field crickets Gryllus pennsylvanicus signal their age  cJan-01-2011  a185 - 1940 v813 a<p>Older males are often reported to have higher mating success than younger males. To the extent that male quality and survival are positively correlated, this observation raises the possibility that females use male signals to assess age and thus quality. I tested this hypothesis in the fall field cricket, Gryllus pennsylvanicus, a species in which females are known to prefer older males, and males call to attract females. Tests were both longitudinal (males recorded early and late in life) and cross-sectional (males recorded once, each at different ages). I measured a variety of temporal and spectral calling song parameters and tested the predictions that: 1) calling song changes with age, and 2) variation in calling song correlates with variation in age. I found significant changes with increased age: calls showed decreased pulse period, decreased pulse duration, decreased pulse peak frequency, more pulses per chirp and increased pulse period variability. Although pulse period and pulse duration were negatively correlated with male age in bivariate correlations, canonical correlation failed to detect any significant relationship between male age and any linear combination of song parameters. I also measured a number of male body size traits and found that the majority of information in male song appears to be related to body size. I discuss the results in relation to the auditory sensitivity of G. pennsylvanicus, and suggest a simple mechanism that explains both female preference for older males and female discrimination against heterospecific males.</p>
10aage-based indicator mechanism10abioacoustics10acalling song10aGryllinae10aolder males10aOrthoptera survival1 aJudge, Kevin, A.  uhttp://linkinghub.elsevier.com/retrieve/pii/S000334721000401X