Intraspecific Variation in Postnatal Growth in the Greater Spear-Nosed Bat
نویسندگان
چکیده
منابع مشابه
Vocal learning by greater spear-nosed bats.
Vocal learning is well known among passerine and psittacine birds, but most data on mammals are equivocal. Specific benefits of vocal learning are poorly understood for most species. One case where vocal learning should be favoured by selection is where calls indicate group membership and group mates are unrelated. Female greater spear-nosed bats, Phyllostomus hastatus, live in stable groups of...
متن کاملSocial calls coordinate foraging in greater spear-nosed bats
The function of social calls emitted by foraging bats has received little study. Here we use observations of free-ranging greater spear-nosed bats, Phyllostomus hastatus, and field playbacks to determine whether audible, broad-band 'screech' calls attract mates, warn conspecifics or influence access to food. Five lines of evidence suggest that screech calls enable adult females from the same ro...
متن کاملGreater spear-nosed bats discriminate group mates by vocalizations.
Individuals often benefit from identifying their prospective social partners. Some species that live in stable social groups discriminate between their group mates and others, basing this distinction on calls that differ among individuals. Vocalizations that differ between social groups are much less common, and few studies have demonstrated that animals use group-distinctive calls to identify ...
متن کاملUse of binaural cues for sound localization in two species of Phyllostomidae: the Greater spear-nosed bat (Phyllostomus hastatus) and the Short-tailed fruit bat (Carollia perspicillata).
Unlike humans, not all mammals use both of the binaural cues for sound localization. Whether an animal uses these cues can be determined by testing its ability to localize pure tones; specifically, low frequencies are localized using time-difference cues, and high frequencies are localized using intensity-difference cues. We determined the ability to use binaural cues in 2 New World bats, Phyll...
متن کاملSelection on Social Traits in Greater Spear-Nosed Bats, Phyllostomus hastatus Author(s):
Many studies assume that selection molds social traits and have investigated the manner in which this occurs, yet very few studies have measured the strength of selection on social traits in natural populations. In this paper, I report results of phenotypic selection analyses on two social traits the size of social groups and the frequency of group foraging in Phyllostomus hastatus, the greater...
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ژورنال
عنوان ژورنال: Journal of Mammalogy
سال: 1998
ISSN: 0022-2372
DOI: 10.2307/1383086