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- Acoustic analysis (2)
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Articles 1 - 10 of 10
Full-Text Articles in Animal Sciences
The Evolution Of Lateralized Foot Use In Parrots: A Phylogenetic Approach, Culum Brown, Maria Magat
The Evolution Of Lateralized Foot Use In Parrots: A Phylogenetic Approach, Culum Brown, Maria Magat
Sentience Collection
Cerebral lateralization refers to the division of cognitive function in either brain hemisphere and may be overtly expressed as behavioral asymmetries, such as handedness. The evolutionary history of laterality is of considerable interest due to its close link with the development of human language. Although considerable research effort has aimed at the proximate explanations of cerebral lateralization, considerably less attention has been paid to ultimate explanations. The extent to which laterality is constrained by phylogeny or shaped by ecological forces through natural selection has received little attention. Here, the foot preference of 23 species of Australian parrots was examined to …
Indicators Of Age, Body Size And Sex In Goat Kid Calls Revealed Using The Source–Filter Theory, Elodie F. Briefer, Alan G. Mcelligott
Indicators Of Age, Body Size And Sex In Goat Kid Calls Revealed Using The Source–Filter Theory, Elodie F. Briefer, Alan G. Mcelligott
Sentience Collection
The source–filter theory is an important framework recently applied to the study of animal vocalisations, which links the mode of vocal production to call parameters. Vocalisations can be good indicators of a sender’s characteristics, such as identity, body size, age, and even hormonal status and affective states. For these reasons, applied vocal communication research would greatly benefit from adopting the source–filter theory approach to identify key call parameters linked to physical and physiological characteristics of domestic animals. Here, we introduce the source–filter theory through a detailed analysis and interpretation of goat contact calls during development. In mammals, vocal development is …
Cerebral Lateralization Determines Hand Preferences In Australian Parrots, Culum Brown, Maria Magat
Cerebral Lateralization Determines Hand Preferences In Australian Parrots, Culum Brown, Maria Magat
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Individual preference for the use of one limb over the other to explore the environment or manipulate objects is common trait among vertebrates. Here, we explore the hypothesis that limb preference is determined by the engagement of a particular cerebral hemisphere to analyse certain stimuli. We recorded the eye and foot preferences of 322 individuals from 16 species of Australian parrots while investigating potential food items. Across all species, eye preferences explained 99 per cent of the variation in foot use in Australian parrots. The vast majority of species showed significant relationships between eye and foot preferences at the population …
Comprehension Of Functional Support By Enculturated Chimpanzees Pan Troglodytes, Anna M. Yocom, Sarah T. Boysen
Comprehension Of Functional Support By Enculturated Chimpanzees Pan Troglodytes, Anna M. Yocom, Sarah T. Boysen
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Studies of causal understanding of tool relationships in captive chimpanzees have yielded disparate findings, particularly those reported by Povinelli & colleagues (2000) for tool tasks by laboratory chimpanzees. The present set of experiments tested nine enculturated chimpanzees on three versions of a support task, as described by Povinelli (2000), during which food rewards were presented in different experimental configurations. In Experiment 1, stimulus pairs included a choice between a cloth with a reward on the upper right corner or with a second reward off the cloth, adjacent to a corner, with the second pair comprised of a cloth with food …
Mutual Mother–Offspring Vocal Recognition In An Ungulate Hider Species (Capra Hircus), Elodie F. Briefer, Alan G. Mcelligott
Mutual Mother–Offspring Vocal Recognition In An Ungulate Hider Species (Capra Hircus), Elodie F. Briefer, Alan G. Mcelligott
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Parent–offspring recognition can be essential for offspring survival and important to avoid misdirected parental care when progeny mingle in large social groups. In ungulates, offspring anti-predator strategies (hiding vs. following) result in differences in mother–offspring interactions, and thus different selection pressures acting on the recognition process during the first weeks of life. Hider offspring are isolated and relatively stationary and silent to avoid detection by predators, whereas follower offspring are mobile and rapidly mix in large social groups. For these reasons, hiders have been suggested to show low offspring call individuality leading to unidirectional recognition of mothers by offspring and …
Personality Traits Predict Hierarchy Rank In Male Rainbowfish Social Groups, Mathieu Colléter, Culum Brown
Personality Traits Predict Hierarchy Rank In Male Rainbowfish Social Groups, Mathieu Colléter, Culum Brown
Sentience Collection
Personality traits are becoming increasingly important in explaining adaptive individual differences in animal behaviour and probably represent a leading edge of the evolutionary process. Despite the newfound interest in animal personality among behavioural ecologists, fewstudies have investigated the link between personality traits and fitness measures. We examined this link using male rainbowfish, Melanotaenia duboulayi, as a model species and found that a range of personality traits (aggression, activity and boldness) covaried with a male’s position in a hierarchy, which is directly related to reproductive success in this and many other species. Dominant fish were more aggressive, active, bold and also …
Pantomime In Great Apes: Evidence And Implications, Ann E. Russon, Kristin Andrews
Pantomime In Great Apes: Evidence And Implications, Ann E. Russon, Kristin Andrews
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We recently demonstrated, by mining observational data, that forest-living orangutans can communicate using gestures that qualify as Pantomime. Pantomimes, like other iconic gestures, physically resemble their referents. More elaborately, pantomimes involve enacting their referents. Holding thumb and finger together at the lips and blowing between them to mean balloon is one example. Here we sketch evidence of pantomime in other great apes, methodological concerns, and sophisticated cognitive capabilities that great ape pantomimes suggest.
Social Knowledge, Keith Jensen, Joan B. Silk, Kristin Andrews, Redouan Bshary, Dorothy L. Cheney, Nathan Emery, Charlotte K. Hemelrijk, Kay Holekamp, Derek C. Penn, Josef Perner, Christoph Teufel
Social Knowledge, Keith Jensen, Joan B. Silk, Kristin Andrews, Redouan Bshary, Dorothy L. Cheney, Nathan Emery, Charlotte K. Hemelrijk, Kay Holekamp, Derek C. Penn, Josef Perner, Christoph Teufel
Sentience Collection
The social milieus of animals can be complex, ranging from almost completely asocial to monogamous pairs (no mean feat) to entire societies. To adapt to a constantly shifting environment of individuals striving toward their own goals, animals appear to have evolved specialized cognitive abilities. As appealing and intuitive as the idea of social cognition is, just defi ning it is diffi cult. We attempted to delineate social cognition, speculate on its adaptive value, and come to an understanding of what we mean when we talk about complexity. Transitive inference was often brought up as an example of a cognitive ability …
Cetaceans And Primates: Convergence In Intelligence And Self-Awareness, Lori Marino
Cetaceans And Primates: Convergence In Intelligence And Self-Awareness, Lori Marino
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Cetaceans (dolphins, porpoises and whales) have been of greatest interest to the astrobiology community and to those interested in consciousness and selfawareness in animals. This interest has grown primarily from knowledge of the intelligence, language and large complex brains that many cetaceans possess. The study of cetacean and primate brain evolution and cognition can inform us about the contingencies and parameters associated with the evolution of complex intelligence in general, and, the evolution of consciousness. Striking differences in cortical organization in the brains of cetaceans and primates along with shared cognitive capacities such as self-awareness, culture, and symbolic concept comprehension, …
Microdialect And Group Signature In The Song Of The Skylark Alauda Arvensis, Elodie Briefer, Fanny Rybak, Thierry Aubin
Microdialect And Group Signature In The Song Of The Skylark Alauda Arvensis, Elodie Briefer, Fanny Rybak, Thierry Aubin
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The Skylark Alauda arvensis is a territorial species of open landscape in which pairs settle in stable and adjacent territories during the breeding season. Due to the heterogeneity of the habitat, territories are gathered in patches spaced by a few kilometres, in which each male produces very long and complex flight songs as a part of the territorial behaviour. We showed that, in a given patch, all the males (neighbours) share some particular sequences of syllables in their songs, whereas males settled in different patches (strangers) have almost no sequences in common. Such a phenomenon is known as microdialect. To …