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Alteration of the temporal association between courtship audio and visual components affects female sexual response

Integrative Zoology 2023年第4期18卷 720-735页

作者： Clémentine MITOYEN Cliodhna QUIGLEY Virginie CANOINE Silvia COLOMBO Simon WÖLFL leonida fusani Department of Behavioral and Cognitive Biology University of ViennaAustria Konrad Lorenz Institute of Ethology University of Veterinary MedicineViennaAustria Vienna Cognitive Science Hub University of ViennaViennaAustria

Some multimodal signals-that is,occurring in more than one sensory modality-appear to carry additional information which is not present when component signals are presented separately.To understand the function of male ring dove’s(Streptopelia risoria)multimodal courtship,we used audiovisual playback of male displays to investigate female response to stimuli differing in their audiovisual timing.From natural courtship recordings,we created a shifted stimulus where audio was shifted relative to video by aﬁxed value and a jittered stimulus,where each call was moved randomly along the visual channel.We presented 3 groups of females with the same stimulus type,that is,control,shifted,and jittered,for 7 days.We recorded their behavior and assessed pre-and post-test blood estradiol concentration.We found that playback exposure increased estradiol levels,conﬁrming that this technique can be efﬁciently used to study doves’sexual communication.Additionally,chasing behavior(indicating sexual stimulation)increased over experimental days only in the control condition,suggesting a role of multimodal timing on female response.This stresses the importance of signal conﬁguration in multimodal communication,as additional information is likely to be contained in the temporal association between modalities.

关键词： artiﬁcial stimulus audiovisual synchronization multisensory playback signal timing temporal conﬁguration

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Telomere shortening is associated with corticosterone stress response in adult barn swallows

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Current Zoology 2022年第1期68卷 93-101页

作者： Alessandra COSTANZO Roberto AMBROSINI Marco PAROLINI Manuela CAPRIOLI Simona SECOMANDI Diego RUBOLINI leonida fusani Virginie CANOINE Department of Environmental Science and Policy University of Milanvia Celoria 26I-20133 MilanItaly Department of Behavioral and Cognitive Biology University of ViennaAlthanstr.141090 ViennaAustria Konrad Lorenz Institute of Ethology University of Veterinary Medicine ViennaSavoyenstr.1a1160 ViennaAustria

When vertebrates face stressful events,the hypothalamic–pituitary–adrenal(HPA)axis is activated,generating a rapid increase in circulating glucocorticoid(GC)stress hormones followed by a return to baseline levels.However,repeated activation of HPA axis may lead to increase in oxidative stress.One target of oxidative stress is telomeres,nucleoprotein complexes at the end of chromosomes that shorten at each cell division.The susceptibility of telomeres to oxidizing molecules has led to the hypothesis that increased GC levels boost telomere shortening,but studies on this link are scanty.We studied if,in barn swallows Hirundo rustica,changes in adult erythrocyte telomere length between 2 consecutive breeding seasons are related to corticosterone(CORT)(the main avian GC)stress response induced by a standard capture-restraint protocol.Within-individual telomere length did not significantly change between consecutive breeding seasons.Second-year individuals showed the highest increase in circulating CORT concentrations following restraint.Moreover,we found a decline in female stress response along the breeding season.In addition,telomere shortening covaried with the stress response:a delayed activation of the negative feedback loop terminating the stress response was associated with greater telomere attrition.Hence,among-individual variation in stress response may affect telomere dynamics.

关键词： allostasis corticosterone Hirundo rustica stress response telomere

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