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Experimental manipulation of reproductive tactics in Seba’s short-tailed bats:consequences on sperm quality and oxidative status

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Current Zoology 2019年第6期65卷 609-616页

作者： Magali MENIRI Florence GOHON Ophelie GNING gaetan glauser Armelle VALLAT Nicolas JFASEL Fabrice HELFENSTEIN Laboratory of Evolutionary Ecophysiology Institute of BiologyUniversity of NeuchatelSwitzerland Neuchatel Platform of Analytical Chemistry University of NeuchatelSwitzerland Leibniz Institute for Zoo and Wildlife Research Germany

To reproduce,males have to fertilize the female’s eggs,sometimes in competition with ejaculates of other *** species where males display alternative reproductive tactics,whereby territorial males secure mating and non-territorial males have to sneak copulations,the latter might be expected to invest relatively more resources towards sperm quality compared with the territorial *** cells are especially vulnerable to oxidative stress,which reduces male ***,antioxidant resources are expected to modulate sperm quality,and might be allocated differently between reproductive *** test the link between reproductive tactics,redox profile and sperm quality,we experimentally induced changes in the reproductive tactics of 39 captive males Seba's short-tailed bats Carollia *** monitored the blood and ejaculate oxidative balance,and the sperm quality before,7 days and 21 days after the manipulation of reproductive *** ejaculates'oxidative damage was negatively related to sperm velocity,males exhibited similar blood and ejaculates redox profiles and similar sperm quality,regardless of their reproductive ***,these results arise as a consequence of some constraints having been lifted during the *** results also suggest that,in Seba's short-tailed bats,the expression of alternative reproductive tactics is not subjected to strong oxidative ***,our results could reflect an absence of trade-off between pre-and post-copulatory traits in harem males,as they could be selected to invest both in female attraction and sperm quality,as a consequence of their inability to fully monopolize females.

关键词： oxidative stress sperm competition alternative reproductive tactics Carollia perspicillata

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Revisiting the trail pheromone components of the red imported fire ant, Solenopsis invicta Buren

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Insect Science 2023年第1期30卷 161-172页

作者： Tian Xu Nuo Zhang Meng Xu gaetan glauser Ted C.J.Turlings Li Chen State Key Laboratory of Integrated Management of Pest Insects and Rodents Institute of ZoologyChinese Academy of SciencesBeijingChina School of Life Sciences Institute of Life Science and Green DevelopmentHebei UniversityBaodingHebei ProvinceChina College of Forestry Nanjing Forestry UniversityNanjingChina School of Agriculture Yangtze UniversityJingzhouChina Neuchatel Platform of Analytical Chemistry University of NeuchatelNeuchatelSwitzerland Laboratory of Fundamental and Applied Research in Chemical Ecology University of NeuchatelSwitzerland

Ants use species-specific trail pheromones to coordinate their sophisticated foraging *** the past decades,many trail pheromone components with various structures have been identified in ants,including the red imported fire ant,Solenopsis invicta,a notorious invasive species *** compounds,Z,E-(ZEF)and E,E-α-farnesene(EEF),Z,E-(ZEHF)and E,E-α-homofarnesene(EEHF),have been reported as components of *** trail ***,another study reported an analog ofα-farnesene,Z,Z,Z-allofarnesene,as a key trail pheromone *** contrasting results caused some uncertainty about the trail pheromone composition in *** this study,we synthesized ZEF and EEF,ZEHF and EEHF,and reanalyzed the chemicals in the Dufour gland extract and in the trail pheromone fraction of *** worker body *** reported isomers of farnesene and homofarnesene were detected and showed trail-following activity,with ZEF as the major compound,while no allofarnesene was found,neither in the Dufour gland extract nor in the whole-body *** results confirm ZEF and EEF,ZEHF and EEHF as trail pheromone components of ***.

关键词： allofarnesene Dufour gland α-farnesene α-homofarnesene synthesis trail-following

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Is non-host pollen suitable for generalist bumblebees？

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Insect Science 2018年第2期25卷 259-272页

作者： Maryse Vanderplanck Sylvain Decleves Nathalie Roger Corentin Decroo Guillaume Caulier gaetan glauser Pascal Gerbaux Georges Lognay Aurore Richel Nathalie Escaravage Denis Michez Laboratory of Zoology Research Institute for Biosciences University of Mons--UMONS Mons Organic Synthesis and Mass Spectrom- etry Laboratory Interdisciplinary Center for Mass Spectrometry University of Mons--UMONS Mons Research Institute for Biosciences Biology of Marine Organisms and Biomimetics University of Mons--UMONS Mons Belgium Neuch＆tel Platform of Analytical Chem- istry University of Neuch＆tel Neuchtel Switzerland Laboratory of Analytical Chemistry University of Liege Gembloux Agro-Bio Tech Gembloux Unit of Biological and Industrial Chemistry （CBI） University of Liege Gembloux Agro-Bio Tech Gembloux Belgium Laboratoire Evolution et Diversity Biologique （EDB） CNRS ENFA UMR 5174 University Toulouse 3 Paul Sabatier Toulouse France

Current evidence suggests that pollen is both chemically and structurally protected. Despite increasing interest in studying bee-flower networks, the constraints for bee development related to pollen nutritional content, toxicity and digestibility as well as their role in the shaping of bee-flower interactions have been poorly studied. In this study we combined bioassays of the generalist bee Bombus terrestris on pollen of Cirsium, Trifolium, Salix, and Cistus genera with an assessment of nutritional content, toxicity, and digestibility of pollen. Microcolonies showed significant differences in their development, non-host pollen of Cirsium being the most unfavorable. This pollen was characterized by the presence of quite rare 37-sterols and a low digestibility. Cirsium consumption seemed increase syrup collection, which is probably related to a detoxification mixing behavior. These results strongly suggest that pollen traits may act as drivers of plant selection by bees and partly explain why Asteraceae pollen is rare in bee generalist diet.

关键词： bee-flower interactions generalist bees pollen defences

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