<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Anna Bastian</style></author><author><style face="normal" font="default" size="100%">David Steve Jacobs</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">To seek or speak? Dual function of an acoustic signal limits its versatility in communication</style></title><secondary-title><style face="normal" font="default" size="100%">Animal Behaviour</style></secondary-title><short-title><style face="normal" font="default" size="100%">Animal Behaviour</style></short-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">acoustic communication</style></keyword><keyword><style  face="normal" font="default" size="100%">bats</style></keyword><keyword><style  face="normal" font="default" size="100%">co-option</style></keyword><keyword><style  face="normal" font="default" size="100%">constraints</style></keyword><keyword><style  face="normal" font="default" size="100%">eavesdropping</style></keyword><keyword><style  face="normal" font="default" size="100%">echolocation</style></keyword><keyword><style  face="normal" font="default" size="100%">habituation–dishabituation playback</style></keyword><keyword><style  face="normal" font="default" size="100%">individual and sex discrimination</style></keyword><keyword><style  face="normal" font="default" size="100%">signal design</style></keyword><keyword><style  face="normal" font="default" size="100%">vocal signatures</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2017</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Jan-05-2017</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://linkinghub.elsevier.com/retrieve/pii/S0003347217300775</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">127</style></volume><pages><style face="normal" font="default" size="100%">135 - 152</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The perception of different attributes of conspecifics is an integral part of intraspecific communication. It can facilitate the recognition of interaction partners or the assessment of potential mates. Acoustic signals can encode fine-scaled information through the interplay of acoustic variability and specificity. A reliable vocal signature is both unique within a class and variable between classes. Therefore, acoustic complexity might be associated with the number of classes to be discriminated. We investigated the assumption that limitations to signal design may affect the communicative functionality of a signal. To do so, we chose a signal with potentially dual functionality which may therefore display such limitations. In bats, echolocation is used primarily for foraging and orientation but there is increasing support for its additional role in communication. An acoustic analysis of echolocation pulses of the bat Rhinolophus clivosus confirmed sex and individual vocal signatures in echolocation pulses. A habituation&amp;ndash;dishabituation playback experiment suggested that bats perceived these signatures because listening bats clearly discriminated between the sexes (two classes) and between individuals (representatives of a multiclass category), although to different degrees. The simple acoustic structure of these vocalizations provides sufficient specificity for sex discrimination but has limitations for individual discrimination because pulse parameters of individuals increasingly overlapped with increasing group size. We conclude that selection for the primary function of echolocation restricts the acoustic space available for communication. However, we frequently observed echolocation pulses with conspicuous structural modifications. Statistical analyses revealed that these vocalizations yielded increased individual distinctiveness. Such added systematic variation may indicate a communicative function and perhaps a signalling intent of the emitter, although the latter has yet to be tested. The findings suggest that the required specificity for effective communication could be obtained through modification of echolocation variants when adaptations for orientation and foraging constrain the evolution of complex communication signatures.&lt;/p&gt;
</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Luo, Bo</style></author><author><style face="normal" font="default" size="100%">Lu, Guanjun</style></author><author><style face="normal" font="default" size="100%">Chen, Kelly</style></author><author><style face="normal" font="default" size="100%">Guo, Dongge</style></author><author><style face="normal" font="default" size="100%">Huang, Xiaobin</style></author><author><style face="normal" font="default" size="100%">Liu, Ying</style></author><author><style face="normal" font="default" size="100%">Feng, Jiang</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Social calls honestly signal female competitive ability in Asian particoloured bats</style></title><secondary-title><style face="normal" font="default" size="100%">Animal Behaviour</style></secondary-title><short-title><style face="normal" font="default" size="100%">Animal Behaviour</style></short-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">aggressive interaction</style></keyword><keyword><style  face="normal" font="default" size="100%">bats</style></keyword><keyword><style  face="normal" font="default" size="100%">competitive ability echolocation</style></keyword><keyword><style  face="normal" font="default" size="100%">foraging</style></keyword><keyword><style  face="normal" font="default" size="100%">social call</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2017</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Jan-05-2017</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://linkinghub.elsevier.com/retrieve/pii/S0003347217300842</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">127</style></volume><pages><style face="normal" font="default" size="100%">101 - 108</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Why a variety of social animals vocalize during agonistic foraging interactions remains obscure. One possibility is that these signals advertise the signaller&amp;#39;s competitive ability, playing a role in the defence of food resources, yet there is limited evidence in support of this idea. Here, we used adult female Asian particoloured bats, Vespertilio sinensis, to test whether individual variation in competitive ability when foraging can be explained by social calls. Using synchronized infrared video and audio recording, we monitored bat social vocalizations, dominance rank and weight gain in triads under controlled food conditions. Additionally, subsequent playbacks, consisting of experimental stimuli, echolocation pulses and silence, were presented to feeding bats in a laboratory. Analyses showed that females uttered low-frequency social calls composed of one to five syllable types during feeding competition. The rates of social vocalizations increased with reduced food availability. Interestingly, dominance score and weight gain correlated weakly with body size, but positively with call rate and associated parameters. Playback of social calls inhibited the visits of bats to the focal food dish compared to playback of silence and echolocation pulses. The amount of food consumed was greatly reduced in the presence of experimental stimuli versus controls. Collectively, these results highlight that acoustic signals serve as an honest indicator of bat competitive ability.&lt;/p&gt;
</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Anna Bastian</style></author><author><style face="normal" font="default" size="100%">David Steve Jacobs</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">To seek or speak? Dual function of an acoustic signal limits its versatility in communication</style></title><secondary-title><style face="normal" font="default" size="100%">Animal Behaviour</style></secondary-title><short-title><style face="normal" font="default" size="100%">Animal Behaviour</style></short-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">acoustic communication</style></keyword><keyword><style  face="normal" font="default" size="100%">bats</style></keyword><keyword><style  face="normal" font="default" size="100%">co-option</style></keyword><keyword><style  face="normal" font="default" size="100%">constraints</style></keyword><keyword><style  face="normal" font="default" size="100%">eavesdropping</style></keyword><keyword><style  face="normal" font="default" size="100%">echolocation</style></keyword><keyword><style  face="normal" font="default" size="100%">habituation–dishabituation playback</style></keyword><keyword><style  face="normal" font="default" size="100%">individual and sex discrimination</style></keyword><keyword><style  face="normal" font="default" size="100%">signal design</style></keyword><keyword><style  face="normal" font="default" size="100%">vocal signatures</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2017</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Jan-05-2017</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://linkinghub.elsevier.com/retrieve/pii/S0003347217300775</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">127</style></volume><pages><style face="normal" font="default" size="100%">135 - 152</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The perception of different attributes of conspecifics is an integral part of intraspecific communication. It can facilitate the recognition of interaction partners or the assessment of potential mates. Acoustic signals can encode fine-scaled information through the interplay of acoustic variability and specificity. A reliable vocal signature is both unique within a class and variable between classes. Therefore, acoustic complexity might be associated with the number of classes to be discriminated. We investigated the assumption that limitations to signal design may affect the communicative functionality of a signal. To do so, we chose a signal with potentially dual functionality which may therefore display such limitations. In bats, echolocation is used primarily for foraging and orientation but there is increasing support for its additional role in communication. An acoustic analysis of echolocation pulses of the bat Rhinolophus clivosus confirmed sex and individual vocal signatures in echolocation pulses. A habituation&amp;ndash;dishabituation playback experiment suggested that bats perceived these signatures because listening bats clearly discriminated between the sexes (two classes) and between individuals (representatives of a multiclass category), although to different degrees. The simple acoustic structure of these vocalizations provides sufficient specificity for sex discrimination but has limitations for individual discrimination because pulse parameters of individuals increasingly overlapped with increasing group size. We conclude that selection for the primary function of echolocation restricts the acoustic space available for communication. However, we frequently observed echolocation pulses with conspicuous structural modifications. Statistical analyses revealed that these vocalizations yielded increased individual distinctiveness. Such added systematic variation may indicate a communicative function and perhaps a signalling intent of the emitter, although the latter has yet to be tested. The findings suggest that the required specificity for effective communication could be obtained through modification of echolocation variants when adaptations for orientation and foraging constrain the evolution of complex communication signatures.&lt;/p&gt;
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