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The evolutionary origin of human hyper-cooperation.
Proactive, that is, unsolicited, prosociality is a key component of our hyper-cooperation, which in turn has enabled the emergence of various uniquely human traits, including complex cognition,Expand
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Anti-predator behavior of group-living Malagasy primates: mixed evidence for a referential alarm call system
Abstract. Many mammals warn conspecifics with alarm calls about detected predators. These alarm calls are either functionally referential, urgency based, or they can have multiple functions,Expand
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Nightingales respond more strongly to vocal leaders of simulated dyadic interactions
Although vocal interactions in songbirds have been well studied, little is known about the extent to which birds attend to their conspecifics' interactions. Attending to others' interactions canExpand
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A 15-Year Perspective on the Social Organization and Life History of Sifaka in Kirindy Forest
In this chapter, we summarize some fundamental demographic and morphometric data from the first 15 years of a long-term study of Verreaux’s sifaka (Propithecus verreauxi) at Kirindy Forest in WesternExpand
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Sex-biased survival predicts adult sex ratio variation in wild birds
Adult sex ratio (ASR) is a central concept in population demography and breeding system evolution, and has implications for population viability and biodiversity conservation. ASR exhibits immenseExpand
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Reaching a Consensus: Terminology and Concepts Used in Coordination and Decision-Making Research
Research on coordination and decision-making in humans and nonhuman primates has increased considerably throughout the last decade. However, terminology has been used inconsistently, hampering theExpand
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Influence of reproductive season and rank on fecal glucocorticoid levels in free-ranging male Verreaux's sifakas (Propithecus verreauxi)
Studies in anthropoid primates and other mammals suggest that reproductive season, rank, reproductive skew, aggression received, and social support are the major factors influencing glucocorticoidExpand
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Vocal Repertoire of Cebus capucinus: Acoustic Structure, Context, and Usage
Researchers studying nonhuman primate vocal repertoires suggest that convergent environmental, social, and motivational factors account for intra- and interspecific vocal variation. We provide aExpand
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Reciprocal recognition of sifaka (Propithecus verreauxi verreauxi) and redfronted lemur (Eulemur fulvus rufus) alarm calls
Redfronted lemurs (Eulemur fulvus rufus) and Verreaux's sifakas (Propithecus verreauxi verreauxi) occur sympatrically in western Madagascar. Both species exhibit a so-called mixed alarm call systemExpand
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ON THE VOCAL EXPRESSION OF EMOTION. A MULTI-PARAMETRIC ANALYSIS OF DIFFERENT STATES OF AVERSION IN THE SQUIRREL MONKEY
There is general agreement that in non-human primates, the emotional state of a caller is reflected in the vocal structure. But only few studies describe call features characterizing such correlates.Expand
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