Preprints
Filtering by Subject: Evolution
Tracheal chambers as a key innovation for high frequency emission in bat echolocation.
Published: 2025-03-05
Subjects: Animal Sciences, Biology, Ecology and Evolutionary Biology, Evolution, Life Sciences, Zoology
Key innovations play a crucial role in driving biodiversity and facilitating evolutionary success by enabling organisms to adapt to various ecological niches through the diversification of phenotypic traits. These innovations have been observed in different vertebrate clades, such as mammals evolving hypsodonty to graze on contemporary grasses and bats with the evolution of echolocation, [...]
Exploring the interplay of epigenetics and individualization
Published: 2025-03-04
Subjects: Ecology and Evolutionary Biology, Evolution
Considering individual differences enhances our understanding of eco-evolutionary processes. Epigenetic modifications, which enable the same genotype to produce different phenotypes, may serve as a key proximate mechanism underlying these differences. We propose that epigenetic mechanisms mediate the realization of individualized niches. This process is best understood by distinguishing between [...]
Beyond the obstetric dilemma: evolutionary maternal-fetal conflict causes health problems in pregnancy and childbirth
Published: 2025-03-03
Subjects: Anthropology, Biological and Physical Anthropology, Ecology and Evolutionary Biology, Evolution, Genetics, Life Sciences, Maternal and Child Health, Medicine and Health Sciences, Translational Medical Research
In excellent recent work, Webb and colleagues challenged the so-called “obstetric dilemma”—the long-standing hypothesis that human childbearing is particularly dangerous because we have a narrow pelvis but large infant heads (we are bipedal and smart). They showed that humans and chimpanzees have a comparable fetal-pelvic squeeze. What, then, causes risky childbirth in humans? Webb and colleagues [...]
Repeated mitochondrial capture with limited genomic introgression in a lizard group
Published: 2025-02-19
Subjects: Ecology and Evolutionary Biology, Evolution, Genetics and Genomics, Life Sciences
Mitochondrial introgression is common among animals and is often first identified through mitonuclear discordance — discrepancies between evolutionary relationships inferred from mitochondrial DNA (mtDNA) and nuclear DNA (nuDNA). Over recent decades, genomic data have also revealed extensive nuclear introgression in many animal groups, with implications for genetic and phenotypic diversity. [...]
On the feasibility of nonadaptive, nonsequential abiogenesis
Published: 2025-02-18
Subjects: Biochemistry, Biochemistry, Biophysics, and Structural Biology, Cellular and Molecular Physiology, Comparative and Evolutionary Physiology, Computational Biology, Evolution, Molecular Biology, Molecular Genetics, Other Ecology and Evolutionary Biology, Population Biology, Systems and Integrative Physiology Life Sciences, Systems Biology
The emergence of life from non-living matter remains one of the most profound unresolved questions in natural philosophy. Classical models derived from the Oparin-Haldane hypothesis assume a gradual (sequential), selective assembly of biological precursors. Yet, for more than a century, all experimental efforts in this direction have failed in their attempt to achieve material abiogenesis. May be [...]
A new perspective on Squamate social cognition – the use of semiochemicals
Published: 2025-02-07
Subjects: Behavior and Ethology, Ecology and Evolutionary Biology, Evolution, Life Sciences
The Social Intelligence Hypothesis suggests that cognition might be key to enable animals to live in social groups. Especially social cognition is important as it allows animals to respond appropriately to conspecifics and ensure group cohesion. Social cognition is extensively studied in mammals and birds but to gain a broad understanding of the benefits of social cognitive processes in social [...]
Transmission of human handedness: a reanalysis
Published: 2025-02-03
Subjects: Evolution
Human handedness results from the interplay of genetic and cultural influences. A gene-culture co-evolutionary model for handedness was introduced by Laland et al. (1995), and the present study generalizes that model and the related analysis. We address ambiguities in the original methodology, particularly regarding maximum likelihood estimation, and incorporate sex differences in cultural [...]
Promoting the use of phylogenetic multinomial generalised mixed-effects model to understand the evolution of discrete traits
Published: 2025-01-30
Subjects: Ecology and Evolutionary Biology, Evolution
Phylogenetic comparative methods (PCMs) are fundamental tools for understanding trait evolution across species. While linear models are widely used for continuous traits in ecology and evolution, their application to discrete traits - particularly ordinal and nominal traits - remains limited. Researchers sometimes recategorise such traits into binary traits (0 or 1 data) to make them more [...]
The rise and fall of proboscidean ecological diversity
Published: 2025-01-21
Subjects: Evolution
Proboscideans were keystone Cenozoic megaherbivores and present a highly relevant case study to frame the timing and magnitude of recent megafauna extinctions against long-term macroevolutionary patterns. By surveying the entire proboscidean fossil history using model-based approaches, we show that the dramatic Miocene explosion of proboscidean functional diversity was triggered by their [...]
Does post-natal parental care influence cognitive development in a social gecko?
Published: 2025-01-06
Subjects: Behavior and Ethology, Ecology and Evolutionary Biology, Evolution, Life Sciences
How cognition evolved remains a debated “hot-topic” in the field of animal cognition. Current hypotheses link variation in sociality, ecology, and more generally, environmental challenges to differences in cognitive development, both between as well as within species. Research supporting the Social Intelligence Hypothesis, which states that cognition evolved to deal with social challenges, is [...]
Unlocking the hidden dimensions of genomic diversity within species
Published: 2024-12-16
Subjects: Evolution, Genomics, Molecular Biology
The missing heritability problem, defined as the failure of genetic variants to explain variance in phenotypes, has been an unsolved issue in genetics for the past two decades. A potential solution to this problem stems from the idea that single nucleotide polymorphisms and copy-number variants, the most commonly studied forms of genomic diversity, do not represent the totality of the information [...]
The Development and Evolution of Arthropod Tagmata
Published: 2024-12-10
Subjects: Biology, Cell and Developmental Biology, Developmental Biology, Ecology and Evolutionary Biology, Entomology, Evolution, Integrative Biology, Life Sciences
The segmented body plan is a hallmark of the arthropod body plan. Morphological segments are formed during embryogenesis, through a complex procedure involving the activation of a series of gene regulatory networks. The segments of the arthropod body are organized into functional units known as tagmata, and these tagmata are different among the arthropod classes (e.g. head, thorax and abdomen in [...]
Don’t ask “when is it coevolution?” — ask “how?”
Published: 2024-12-09
Subjects: Ecology and Evolutionary Biology, Evolution, Life Sciences
Coevolution is widely defined as specific, simultaneous, reciprocal adaptation by pairs of interacting species. This strict-sense definition arose from a desire for conceptual clarity, but it has never reflected the much wider diversity of ways in which interacting species may shape each other's evolution. As a result, much of the literature on the evolutionary consequences of species [...]
Synthesis of nature’s extravaganza: an augmented meta-meta-analysis on (putative) sexual signals
Published: 2024-12-06
Subjects: Behavior and Ethology, Ecology and Evolutionary Biology, Evolution
Conspicuous traits that do not seem to contribute to the survival of their bearers, such as colourful body parts and bizarre behaviours, have puzzled biologists for centuries. Sexual selection theory posits that these traits evolved because more conspicuous individuals attract more mates and experience greater fitness, yet evidence for this remains fragmented. Our augmented meta-meta-analysis of [...]
Life, Death and Energy: Nature Selects No Free Lunch
Published: 2024-11-25
Subjects: Ecology and Evolutionary Biology, Evolution, Other Ecology and Evolutionary Biology
Brown et al. (2024) highlight that organisms invest a constant amount of energy into the production of viable offspring per unit of body mass per generation. This explains how diversity in life can exist. We interpret their result in relation to balancing offspring costs in real vs. physiological time.