查看更多>>摘要：Cicadas usually sing and mate in the higher parts of trees.Studies addressing the effects of different acoustic signals on mate choice in Cicadidae are very limited.We investigated the effects of both acoustical features and morphological traits on mate choice in an East Asian cicada Platypleura kaemp-feri.Males produce high-rate calling songs that attract females,then produce low-rate courtship songs to secure mating when a female is attracted.Higher calling song rate(CR),shorter single-pulse dur-ation,and shorter pulse period of the calling song,together with lower courtship song rate and longer echeme period of the courtship song,are the most desirable traits used by females to choose a mate.These traits indicate that the more a male can raise the rate of song production,the higher the probabil-ity he is sexually selected by the female.No correlation was found between morphological traits and mating success.After mating,a minority of males started emitting calling songs again,but the CR was significantly lower than before mating and none of them attracted a new mate later.This promotes females mating with unmated males.We hypothesize that P.kaempferi may have the best of both worlds due to the unique song modulation and the mechanism of female mate choice:males change energetically,costly acoustic signals to achieve mates,while females choose a mate based on males'acoustic properties.Our results contribute to better understanding the diversity of mating preference and enrich the mechanism of mate choice in acoustic insects.
查看更多>>摘要：As predators,the macronutrients spiders extract from their prey play important roles in their mat-ing and reproduction.Previous studies of macronutrients on spider mating and reproduction focus on protein,the potential impact of prey lipid content on spider mating and reproduction remains largely unexplored.Here,we tested the influence of prey varying in lipid content on female mating,sexual cannibalism,reproduction,and offspring fitness in the wolf spider Pardosa pseudoannulata.We acquired 2 groups of fruit fly Drosophila melanogaster that differed significantly in lipid but not protein content by supplementing cultural media with a high or low dose of sucrose on which the fruit flies were reared(HL:high lipid and LL:low lipid).Subadult(i.e.,1 molt before adult)female spiders that fed HL flies matured with significantly higher lipid content than those fed LL flies.We found that the mated females fed with HL flies significantly shortened pre-oviposition time and resulted in a significantly higher fecundity.However,there was no significant difference in female spiders varying in lipid content on other behaviors and traits,including the latency to courtship,courtship duration,mating,copulation duration,sexual cannibalism,offspring body size,and sur-vival.Hence,our results suggest that the lipid content of prey may be a limiting factor for female re-production,but not for other behavioral traits in the wolf spiders P.pseudoannulata.
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