Peer-reviewed Articles - Biology

105 downloads
450 views

Long-term field studies are critical for our understanding of animal life history and the processes driving changes in demography. Here, we present long-term demographic data for the northernmost population of mantled howler monkeys (Alouatta palliata) residing...

["Animal Behavior","Anthropology","Conservation Biology","Ecology","Zoology"]
doi:10.7717/peerj.3547
56 downloads
434 views

The physical environments of captive and wild animals frequently differ in substrate types and compliance. As a result, there is an assumption that differences in rearing environments between captive and wild individuals produce differences in skeletal morphology....

["Anthropology","Zoology"]
doi:10.7717/peerj.3668
765 downloads
3,346 views

Background Facial expressions convey key cues of human emotions, and may also be important for interspecies interactions. The universality hypothesis suggests that six basic emotions (anger, disgust, fear, happiness, sadness, and surprise) should be expressed by...

["Animal Behavior","Anthropology","Zoology","Psychiatry and Psychology","Public Health"]
doi:10.7717/peerj.3413
2 citations
106 downloads
548 views

Background The Eocene was the warmest epoch of the Cenozoic and recorded the appearance of several orders of modern mammals, including the first occurrence of Euprimates. During the Eocene, Euprimates were mainly represented by two groups, adapiforms and omomyiforms,...

["Anthropology","Biodiversity","Paleontology","Taxonomy","Zoology"]
doi:10.7717/peerj.3239
1 citation
237 downloads
1,106 views

The phylogenetic position of many fossil platyrrhines with respect to extant ones is not yet clear. Two main hypotheses have been proposed: the layered or successive radiations hypothesis suggests that Patagonian fossils are Middle Miocene stem platyrrhines lacking...

["Anthropology","Biodiversity","Evolutionary Studies","Zoology"]
doi:10.7717/peerj.1967
7 citations
248 downloads
1,160 views

Using a model organism (rabbits) that resembles a number of mammalian herbivores in key aspects of its chewing behaviors, we examined how variation in dietary mechanical properties affects food breakdown during mastication. Such data have implications for understanding...

["Anthropology","Evolutionary Studies","Paleontology","Zoology","Anatomy and Physiology"]
doi:10.7717/peerj.1345
17 citations
1,436 downloads
7,567 views

A shared principle in the evolution of language and the development of speech is the emergence of functional flexibility, the capacity of vocal signals to express a range of emotional states independently of context and biological function. Functional flexibility...

["Animal Behavior","Anthropology","Evolutionary Studies","Zoology"]
doi:10.7717/peerj.1124
6 citations
688 downloads
1,538 views

Dominance hierarchy influences the life quality of social animals, and its definition should in principle be based on the outcome of agonistic interactions. However, defining and comparing the dominance profile of social groups is difficult due to the different...

["Animal Behavior","Anthropology","Zoology"]
doi:10.7717/peerj.729
3 citations
636 downloads
3,807 views

Amplifiers are signals that improve the perception of underlying differences in quality. They are cost free and advantageous to high quality individuals, but disadvantageous to low quality individuals, as poor quality is easier perceived because of the amplifier....

["Animal Behavior","Anthropology","Evolutionary Studies","Zoology"]
doi:10.7717/peerj.357
16 citations
741 downloads
5,138 views

Social learning can play a critical role in the reproduction and survival of social animals. Individual differences in the propensity for social learning are therefore likely to have important fitness consequences. We asked whether personality might underpin such...

["Animal Behavior","Anthropology","Ecology","Zoology"]
doi:10.7717/peerj.283

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