Luis M. Torres‐Vila, Rafael López‐Calvo, Francisco Ponce‐Escudero, F. Javier Mendiola‐Díaz, Félix Fernández‐Moreno, Álvaro Sánchez‐González
{"title":"Phototrap‐assessed diel activity of Cerambyx cerdo and Cerambyx welensii sympatric populations in the wild: Does extreme drought boost diurnality?","authors":"Luis M. Torres‐Vila, Rafael López‐Calvo, Francisco Ponce‐Escudero, F. Javier Mendiola‐Díaz, Félix Fernández‐Moreno, Álvaro Sánchez‐González","doi":"10.1111/afe.12641","DOIUrl":null,"url":null,"abstract":"<jats:list> <jats:list-item>Longhorn beetles (Cerambycidae) are a very diverse group whose species vary greatly in morphology and behaviour, particularly in diel activity. The type genus <jats:italic>Cerambyx</jats:italic> includes two large oak‐ling sympatric species (<jats:italic>Cerambyx cerdo</jats:italic> and <jats:italic>Cerambyx welensii</jats:italic>) that exhibit a crepuscular/nocturnal (dim‐light) lifestyle, but their actual diel activity remains largely unclear.</jats:list-item> <jats:list-item>We used phototraps in the wild to assess if diel activity depended on either species, sex or annual meteorology. Phototraps were highly effective, and the imaged activities were representative of beetles' life, including interactions with some vertebrate species.</jats:list-item> <jats:list-item>Both longhorns exhibited roughly similar crepuscular/nocturnal behaviour, with daytime activity being usually residual or erratic. Diel activity increased sharply just before dusk, peaked between dusk and early dark night (23:00–2:00 h), and then dropped progressively until disappearing at dawn. Diel activity was sexually dimorphic in <jats:italic>C. welensii,</jats:italic> as in some years females tended to be active earlier than males.</jats:list-item> <jats:list-item>Distinctly, in 2022, the warmest and driest year recorded in the study area, diel activity curves were flatter and wider, with <jats:italic>C. cerdo</jats:italic> activity increasing in the late afternoon (19:00–21:30 h) and <jats:italic>C. welensii</jats:italic> in the second half of the night (3:00–6:00 h). Furthermore, both species boosted daytime activity (diurnality) by more than three times, and diurnality also increased over the season that year.</jats:list-item> <jats:list-item>We finally hypothesise that, under the current climate change scenario, extreme droughts impact diel activity in these species, particularly boosting diurnality, in an attempt to locate water/food sources to counteract body dehydration.</jats:list-item> </jats:list>","PeriodicalId":7454,"journal":{"name":"Agricultural and Forest Entomology","volume":null,"pages":null},"PeriodicalIF":1.6000,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Agricultural and Forest Entomology","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.1111/afe.12641","RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENTOMOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Longhorn beetles (Cerambycidae) are a very diverse group whose species vary greatly in morphology and behaviour, particularly in diel activity. The type genus Cerambyx includes two large oak‐ling sympatric species (Cerambyx cerdo and Cerambyx welensii) that exhibit a crepuscular/nocturnal (dim‐light) lifestyle, but their actual diel activity remains largely unclear.We used phototraps in the wild to assess if diel activity depended on either species, sex or annual meteorology. Phototraps were highly effective, and the imaged activities were representative of beetles' life, including interactions with some vertebrate species.Both longhorns exhibited roughly similar crepuscular/nocturnal behaviour, with daytime activity being usually residual or erratic. Diel activity increased sharply just before dusk, peaked between dusk and early dark night (23:00–2:00 h), and then dropped progressively until disappearing at dawn. Diel activity was sexually dimorphic in C. welensii, as in some years females tended to be active earlier than males.Distinctly, in 2022, the warmest and driest year recorded in the study area, diel activity curves were flatter and wider, with C. cerdo activity increasing in the late afternoon (19:00–21:30 h) and C. welensii in the second half of the night (3:00–6:00 h). Furthermore, both species boosted daytime activity (diurnality) by more than three times, and diurnality also increased over the season that year.We finally hypothesise that, under the current climate change scenario, extreme droughts impact diel activity in these species, particularly boosting diurnality, in an attempt to locate water/food sources to counteract body dehydration.
期刊介绍:
Agricultural and Forest Entomology provides a multi-disciplinary and international forum in which researchers can present their work on all aspects of agricultural and forest entomology to other researchers, policy makers and professionals.
The Journal welcomes primary research papers, reviews and short communications on entomological research relevant to the control of insect and other arthropod pests. We invite high quality original research papers on the biology, population dynamics, impact and management of pests of the full range of forest, agricultural and horticultural crops.