02556nas a2200361   4500008004100000245010000041210006900141260000800210300001200218490000700230520161300237653000901850653001101859653001301870653001601883653001501899653001701914653001601931653001601947653001701963653001001980653000901990653001501999653001902014653001702033653001702050653001802067653002402085100001602109700001502125700002002140856003402160       2004                        eng d00aTrophic preferences mediated by olfactory cues in dung beetles colonizing cattle and horse dung0 aTrophic preferences mediated by olfactory cues in dung beetles c  cApr  a370-3770 v333 aScarab beetles colonizing vertebrate feces are considered polyphagous insects, because they often use dung of several species. However, recent works have provided evidence for strong feeding preferences in some dung beetle species. The influence of dung odors in the process of resource selection by beetles has not received attention. The objective of this study was to investigate trophic preferences in Mediterranean dung beetles colonizing cattle and horse dung. The pattern of resource use by insects was studied using series of pitfall traps baited with cattle or horse dung in three different sites of south-central France. A total of 4,276 insects belonging to 39 species were captured. Cattle dung attracted more insects than horse feces (2,570 versus 1,706 individuals). Twenty-four of the 39 beetle species collected had clear feeding preferences for cattle dung (13 species) or horse dung (11 species). None of these species seemed linked exclusively to one kind of dung. The behavioral responses of seven scarab beetles to volatile compounds emitted by cattle and horse dung were compared in laboratory olfactometer bioassays. Three insect species (Aphodius erraticus, A. scrutator, Onthophagus vacca) were more attracted to volatile compounds from cattle dung. Two other species (Euonthophagus amyntas, Bubas bubalus) orientated preferentially toward horse dung volatiles. Except for two species, beetles were thus attracted to volatiles from the dung type they preferred in the field. The reasons why coprophagous beetles show local feeding preferences for particular dung types are discussed.10abait10aburial10acapacity10acattle dung10aCOLEOPTERA10acolonization10acommunities10adung beetle10aDung beetles10afeces10afood10ahorse dung10amammal mammals10aolfactometer10aScarabaeidae10aScarabaeoidea10atrophic preferences1 aDormont, L.1 aEpinat, G.1 aLumaret, J., P.  u<Go to ISI>://00022085650003302383nas a2200229   4500008004100000245009300041210006900134300001000203490000700213520163100220653001701851653001901868653002101887653001701908653002401925653000801949100002101957700001901978700002101997700002502018856011002043       2007                        eng d00aInfluence of dung volatiles on the process of resource selection by coprophagous beetles0 aInfluence of dung volatiles on the process of resource selection  a23-300 v173 aMost dung beetles colonize the faeces of several vertebrate species without much discrimination, and are thus often considered as polyphagous. Recent studies have provided evidence for clear feeding preferences in scarab beetles colonizing dung of herbivore species, but little is known about these insects’abilities to discriminate among odours from faeces of various herbivores. In this study, trophic preferences were examined using blocks of pitfall traps baited with dung from four different herbivore species, i.e., sheep, cattle, horse, and red deer, in a moun- tainous area of south-central France. 4941 coprophagous scarabs, belonging to 27 species, were captured. Beetles were more attracted to dung of sheep (2257 individuals) than that of cattle (1294 individuals), followed by deer dung (768 individuals) and horse dung (622 individuals). Eleven of the 27 beetle species collected had significant feeding preferences for one of the four dung types. For each insect species, trophic habits did not vary between the two differ- ent sites of trapping, an open pasture and a wooded habitat. In laboratory olfactometer bioassays, scarab beetles orien- tated preferentially towards the dung volatiles from the dung type they preferred in the field. Trypocopris pyrenaeus, Anoplotrupes stercorosus, andAphodius rufipeswere more attracted to volatile compounds from sheep dung, Onthophagus fracticornissignificantly preferred horse dung volatiles, and Aphodius haemorrhoidalis responded posi- tively to deer dung odours. The role of dung olfactory cues in the process of resource selection by dung beetles is discussed.10aDung beetles10adung volatiles10aherbivore faeces10aolfactometer10atrophic preferences10a–1 aDormont, Laurent1 aRapior, Sylvie1 aMcKey, Doyle, B.1 aLumaret, Jean-Pierre  uhttps://scarabnet.myspecies.info/influence-dung-volatiles-process-resource-selection-coprophagous-beetles