Animal Behaviour
An Evolutionary Perspective
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Peter M Kappeler
Zoology
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Article
Open AccessStillbirth of a mandrill (Mandrillus sphinx) in the wild: perinatal behaviors and delivery sequences
Birth is a fundamental event in the life of animals, including our own species. More reports of wild non-human primate births and stillbirths are thus needed to better understand the evolutionary pressures sha...
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Open AccessDrivers and consequences of female reproductive competition in an egalitarian, sexually monomorphic primate
Even after the 150th anniversary of sexual selection theory, the drivers and mechanisms of female sexual selection remain poorly studied. To understand demographic circumstances favoring female-female competit...
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Article
Open AccessInterrelationship among spatial cohesion, aggression rate, counter-aggression and female dominance in three lemur species
How social and ecological factors are associated with variation in dominance style across species of animals has been studied frequently, but the underlying processes are often not addressed. Theoretical resea...
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Open AccessHonest signaling in mouse lemur vocalizations?
Animal vocalizations may provide information about a sender’s condition or motivational state and, hence, mediate social interactions. In this study, we examined whether vocalizations of gray mouse lemurs (Microc...
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Open AccessQuantifying within-group variation in sociality—covariation among metrics and patterns across primate groups and species
It has long been recognized that the patterning of social interactions within a group can give rise to a social structure that holds very different places for different individuals. Such within-group variation...
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Infant Development and Maternal Care in Wild Verreaux’s Sifaka (Propithecus verreauxi)
Investigating factors influencing infant physical and social development is important to elucidate primate adaptations and life history evolution. Infant sifakas exhibit a puzzling mismatch between dental prec...
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Open AccessMaternal stress effects on infant development in wild Verreaux's sifaka (Propithecus verreauxi)
Maternal effects mediated by nutrients or specific endocrine states of the mother can affect infant development. Specifically, pre- and postnatal maternal stress associated with elevated glucocorticoid (GC) ou...
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Behavioural Biology: Content and History
Behavioural biology is a discipline of biology that uses scientific methods to study the behaviour of animals and humans. But what exactly is “behaviour“? Everyone probably has a spontaneous, concrete, and ver...
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Behaviour, Evolution and Life Histories
Modern evolutionary theory provides a theoretical framework for functional analyses of animal behaviour. In order to investigate the adaptive value of individual behaviour patterns, it is necessary to operatio...
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Orientation in Time and Space
The species-specific endowment of various sensory organs enables animals to perceive changes in their environment and respond accordingly. The vast majority of animals are exposed to temporal fluctuations in a...
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Predation
Eating and being eaten are closely related. Since many animals live entirely or partially on animal matter, the feeding behaviour of these predators has drastic negative consequences for the fitness of their p...
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Intrasexual Selection: How Males Compete
Although modern sex roles acknowledge the fact that males and females both compete for and chose mates, there are sound theoretical reasons for expecting massive sex differences in these behavioural domains. B...
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Parental Care
Parental care is defined as any activity by a parent that contributes to increasing the fitness of its offspring (Clutton-Brock 1991). It can begin before birth with the building of a nest or den for the eggs or ...
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Social Systems
The members of a species are distributed in a characteristic manner in space and time; they mate with different numbers of members of the opposite sex, differ in parental care behaviour, and their social inter...
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Article
Open AccessNeophobia and social facilitation in narrow-striped mongooses
Social learning is widespread in the animal kingdom, but individuals can differ in how they acquire and use social information. Personality traits, such as neophobia, may, for example, promote individual learn...
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Methods and Concepts of Behavioural Biology
How can the continuous stream of movements, events and interactions that we can operationalize as behaviour be described and quantified? To do this, it is first necessary to clearly define what can be measured...
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Basic Functions and Behaviour
The behaviour and physiology of an organism are tightly integrated so as to keep an animal in a regulated state of equilibrium. A regulated energy and water balance, or thermoregulation, is an important aspect...
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Habitat and Food Selection
Every animal must feed regularly to secure the energetic basis for growth, maintenance of basic functions and reproduction. Therefore, the search, selection, defence and intake of food has an important functio...
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Book
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Sexual Selection: Evolutionary Foundations
There are a number of other forms of reproduction in the animal kingdom besides the gonochoristic reproduction familiar to us. These variants can be described as life history characteristics that generate cert...
