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Titolo:
Acoustic features of female chacma baboon barks
Autore:
Fischer, J; Hammerschmidt, K; Cheney, DL; Seyfarth, RM;
Indirizzi:
Univ Penn, Dept Biol, Philadelphia, PA 19104 USA Univ Penn Philadelphia PA USA 19104 Dept Biol, Philadelphia, PA 19104 USA Univ Penn, Dept Psychol, Philadelphia, PA 19104 USA Univ Penn Philadelphia PA USA 19104 t Psychol, Philadelphia, PA 19104 USA Deutsch Primatenzentrum, Abt Neurobiol, Gottingen, Germany Deutsch Primatenzentrum Gottingen Germany Neurobiol, Gottingen, Germany
Titolo Testata:
ETHOLOGY
fascicolo: 1, volume: 107, anno: 2001,
pagine: 33 - 54
SICI:
0179-1613(200101)107:1<33:AFOFCB>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
CALIFORNIA GROUND-SQUIRRELS; MACAQUES MACACA-SYLVANUS; BARBARY MACAQUES; ALARM CALLS; SOCIAL RELATIONSHIPS; NONHUMAN-PRIMATES; VOCAL REPERTOIRE; VOCALIZATIONS; BEHAVIOR; SIGNALS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
60
Recensione:
Indirizzi per estratti:
Indirizzo: Fischer, J Max Planck Inst Evolutionary Anthropol, Inselstr 22, D-04103 Leipzig, Germany Max Planck Inst Evolutionary Anthropol Inselstr 22 Leipzig Germany D-04103
Citazione:
J. Fischer et al., "Acoustic features of female chacma baboon barks", ETHOLOGY, 107(1), 2001, pp. 33-54

Abstract

We studied variation in the loud barks of free-ranging female chacma baboons (Papio cynocephalus ursinus) with respect to context, predator type, andindividuality over an 18-month period in the Moremi Game Reserve, Botswana. To examine acoustic differences in relation to these variables, we extracted a suite of acoustic parameters from digitized calls and applied discriminant function analyses. The barks constitute a graded continuum, ranging from a tonal, harmonically rich call into a call with a more noisy, harsh structure. Tonal barks are typically given when the signaler is at risk of losing contact with the group or when a mother and infant have become separated (contact barks). The harsher variants are given in response to large predators (alarm barks). However, there are also intermediate forms between the two subtypes which may occur in both situations. This finding is not due to an overlap of individuals' distinct distributions but can be replicated within individuals. Within the alarm bark category, there are significant differences between calls given in response to mammalian carnivores and those given in response to crocodiles. Again, there are intermediate variants. Both alarm call types are equally different from contact barks, indicating that the calls vary along different dimensions. Finally, there are consistent, significant differences among different individuals' calls. However, individual identity in one call type cannot directly be inferred from knowledge of the individuals' call characteristics in the other. In sum, the barksof female baboons potentially provide rich information to the recipients of these signals. The extent to which baboons discriminate between alarm andcontact barks, and classify calls according to context and/or acoustic similarity will be described in a subsequent paper.

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Documento generato il 21/01/20 alle ore 06:50:32