Peter Hammerstein
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View article: Evolution of behavioural flexibility and the forming and breaking of habits
Evolution of behavioural flexibility and the forming and breaking of habits Open
The formation of habits, whereby learnt actions come to be performed automatically with repetition and practice, is a well-established focus for studies in psychology. This contrasts with evolutionarily motivated studies of learning, which…
View article: A biological employment model of reproductive inequality
A biological employment model of reproductive inequality Open
Continuing the centuries-long exchange between economics and biology, our model of reproductive skew is an adaptation of the principal–agent relationship between an employer and an employee. Inspired by the case of purple martins ( Progne …
View article: Cooperation, with friends or with relatives?
Cooperation, with friends or with relatives? Open
Based on a survey of 200 papers, Kay et al. (1) argue that many modeling results on the evolution of helping are likely due to kin selection, although this was not acknowledged by the original authors. Our work (2) on the evolution of indi…
View article: Underappreciated features of cultural evolution
Underappreciated features of cultural evolution Open
Cultural evolution theory has long been inspired by evolutionary biology. Conceptual analogies between biological and cultural evolution have led to the adoption of a range of formal theoretical approaches from population dynamics and gene…
View article: The evolution of social learning as phenotypic cue integration
The evolution of social learning as phenotypic cue integration Open
Most analyses of the origins of cultural evolution focus on when and where social learning prevails over individual learning, overlooking the fact that there are other developmental inputs that influence phenotypic fit to the selective env…
View article: Community structure of domesticated pigs in livestock facilities
Community structure of domesticated pigs in livestock facilities Open
The social structure of animal groups is considered to have an impact on their health and welfare. This could also be true for animals under commercial conditions, but research in this area has been limited. Pigs for example are known to b…
View article: The evolution of social learning as phenotypic cue integration
The evolution of social learning as phenotypic cue integration Open
Most analyses of the origins of cultural evolution focus on when and where social learning prevails over individual learning, overlooking the fact that there are other developmental inputs that influence phenotypic fit to the selective env…
View article: Underappreciated features of cultural evolution
Underappreciated features of cultural evolution Open
Cultural evolution theory has long been inspired by evolutionary biology. Conceptual analogies between biological and cultural evolution have led to the adoption of a range of formal theoretical approaches from population dynamics and gene…
View article: Sociocultural heterogeneity in a common pool resource dilemma
Sociocultural heterogeneity in a common pool resource dilemma Open
Collective action of resource users is essential for sustainability. Yet, often user groups are socioculturally heterogeneous, which requires cooperation to be established across salient group boundaries. We explore the effect of this type…
View article: Ecological Genetic Conflict: Genetic Architecture Can Shift the Balance between Local Adaptation and Plasticity
Ecological Genetic Conflict: Genetic Architecture Can Shift the Balance between Local Adaptation and Plasticity Open
Genetic polymorphism can contribute to local adaptation in heterogeneous habitats, for instance, as a single locus with alleles adapted to different habitats. Phenotypic plasticity can also contribute to trait variation across habitats, th…
View article: Ecological genetic conflict between specialism and plasticity through genomic islands of divergence
Ecological genetic conflict between specialism and plasticity through genomic islands of divergence Open
There can be genetic conflict between genome elements differing in transmission patterns, and thus in evolutionary interests. We show here that the concept of genetic conflict provides new insight into local adaptation and phenotypic plast…
View article: Evolution of reproductive parasites with direct fitness benefits
Evolution of reproductive parasites with direct fitness benefits Open
Maternally inherited symbionts such as Wolbachia have long been seen mainly as reproductive parasites, with deleterious effects on host fitness. It is becoming clear, however, that, frequently, these symbionts also have beneficial effects …
View article: The role of asymmetries in animal contests
The role of asymmetries in animal contests Open
Hammerstein P. The role of asymmetries in animal contests. Working Papers. Institute of Mathematical Economics. Vol 83. Bielefeld: Center for Mathematical Economics; 1979.
View article: The asymmetric war of attrition
The asymmetric war of attrition Open
Hammerstein P, Parker GA. The asymmetric war of attrition. Working Papers. Institute of Mathematical Economics. Vol 109. Bielefeld: Center for Mathematical Economics; 1981.
View article: Game theory in the ecological context
Game theory in the ecological context Open
Riechert SE, Hammerstein P. Game theory in the ecological context. Working Papers. Institute of Mathematical Economics. Vol 120. Bielefeld: Center for Mathematical Economics; 1983.
View article: Detection vs. selection: integration of genetic, epigenetic and environmental cues in fluctuating environments
Detection vs. selection: integration of genetic, epigenetic and environmental cues in fluctuating environments Open
There are many inputs during development that influence an organism's fit to current or upcoming environments. These include genetic effects, transgenerational epigenetic influences, environmental cues and developmental noise, which are ra…
View article: “Darwin's corollary” and cytoplasmic incompatibility induced by <i>Cardinium</i> may contribute to speciation in <i>Encarsia</i> wasps (Hymenoptera: Aphelinidae)
“Darwin's corollary” and cytoplasmic incompatibility induced by <i>Cardinium</i> may contribute to speciation in <i>Encarsia</i> wasps (Hymenoptera: Aphelinidae) Open
The potential importance of cytoplasmic incompatibility (CI)-inducing bacterial symbionts in speciation of their arthropod hosts has been debated. Theoretical advances have led to a consensus that a role is plausible when CI is combined wi…
View article: Genes as Cues of Relatedness and Social Evolution in Heterogeneous Environments
Genes as Cues of Relatedness and Social Evolution in Heterogeneous Environments Open
There are many situations where relatives interact while at the same time there is genetic polymorphism in traits influencing survival and reproduction. Examples include cheater-cooperator polymorphism and polymorphic microbial pathogens. …
View article: Biological trade and markets
Biological trade and markets Open
Cooperation between organisms can often be understood, like trade between merchants, as a mutually beneficial exchange of services, resources or other ‘commodities’. Mutual benefits alone, however, are not sufficient to explain the evoluti…
View article: Wolbachia and the insect immune system: what reactive oxygen species can tell us about the mechanisms of Wolbachia–host interactions
Wolbachia and the insect immune system: what reactive oxygen species can tell us about the mechanisms of Wolbachia–host interactions Open
Wolbachia are intracellular bacteria that infect a vast range of arthropod species, making them one of the most prevalent endosymbionts in the world. Wolbachia's stunning evolutionary success is mostly due to their reproductive parasitism …
View article: The evolution of social learning and its economic consequences
The evolution of social learning and its economic consequences Open
We use an evolutionary model to simulate agents who choose between two options with stochastically varying payoffs. Two types of agents are considered: individual learners, who rely on trial-and-error methods, and social learners, who imit…