@article {53375,
	title = {Presence of a potential competitor and its individual identity modulate ultrasonic vocalizations in male hamsters},
	journal = {Animal Behaviour},
	volume = {145},
	year = {2018},
	month = {Jan-11-2018},
	pages = {11 - 27},
	abstract = {<p>Animal communication takes place in a complex environment that is constantly modulated by particular social conditions. The majority of examples of signalling behaviours modulated by social context involve the presence of an individual of a particular sex or one that simply represents general competition. However, the identity of the individuals and the social relationships among individuals could also significantly modulate acoustic behaviour. In this study, I examined whether the presence of another male competitor modulates the post-interaction vocal response of a male subject to an oestrous female stimulus in golden hamsters, Mesocricetus auratus. I found that the presence of a potential competitor during an interaction with a female across a wire-mesh barrier significantly decreased the duration, tempo and energy of \&lsquo;post-female calls\&rsquo; over time (experiment 1). Moreover, the call duration and energy of one-note simple calls changed over time depending on the identity of the stimulus male. Males that experienced social conflict and lost a fight maintained call duration and increased the energy of their calls over time, but only if the social interaction with the female was in the presence of another familiar neutral male and not in the presence of a familiar winner male (experiment 2). When the winner male stimulus was present, the duration and energy of the calls produced by the loser decreased with time. Individual recognition between familiar conspecifics with different shared experiences likely modulated the motivational state of the male subject and his vocal response after a social interaction with the female. This study provides new evidence that social complexity (competition and individual recognition) can induce dynamic changes of spectrotemporal features of hamster sexual ultrasonic vocalizations.</p>
},
	keywords = {familiarity, golden hamster, individual recognition, sexual ultrasonic vocalization, social defeat, Syrian hamster, USV duration, USV energy},
	issn = {00033472},
	doi = {10.1016/j.anbehav.2018.08.014},
	url = {https://linkinghub.elsevier.com/retrieve/pii/S0003347218302689https://api.elsevier.com/content/article/PII:S0003347218302689?httpAccept=text/xmlhttps://api.elsevier.com/content/article/PII:S0003347218302689?httpAccept=text/plain},
	author = {Fern{\'a}ndez-Vargas, Marcela}
}
@article {50496,
	title = {Dwarf mongooses use sex and identity cues in isolation calls to discriminate between callers},
	journal = {Animal Behaviour},
	volume = {127},
	year = {2017},
	month = {Jan-05-2017},
	pages = {23 - 31},
	abstract = {<p>The information transmitted by acoustic signals has attracted much scientific interest in recent years. However, isolation calls, which are long-distance vocalizations used by lost group members to reunite with their social group, have been surprisingly neglected. These calls assist in maintaining group cohesion and are thus particularly important in species that depend on the group for survival or reproduction such as cooperative breeders. Our study therefore examined the information transmitted by the isolation vocalization in a wild cooperatively breeding carnivore: the dwarf mongoose, Helogale parvula. We ran an acoustic analysis for informative cues within isolation calls, and conducted a series of playback experiments to identify whether mongooses could discriminate between callers based on these cues. The acoustic structure of dwarf mongoose isolation vocalizations contained information concerning the caller\&$\#$39;s identity, sex and potentially also group membership. Target mongooses discriminated between callers of their own and other groups and biased their response based on the sex of the caller. They responded more quickly and for longer, and approached more closely, for calls of foreign females than calls of female group mates. This is the first time that sex specificity has been demonstrated in the vocalization of an herpestid, and we suggest that dwarf mongooses eavesdrop on the calls of isolated foreigners and may use isolation calls to attract and identify potential mates.</p>
},
	keywords = {acoustic analysis, dwarf mongoose, familiarity, Helogale parvula, individuality, isolation vocalizations, playbacks, sex specificity},
	issn = {00033472},
	doi = {10.1016/j.anbehav.2017.02.019},
	url = {http://linkinghub.elsevier.com/retrieve/pii/S0003347217300660},
	author = {Rubow, Janneke and Cherry, Michael I. and Sharpe, Lynda L.}
}
