32 results for "Devi Stuart-Fox"
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Testosterone-Induced Expression of Male Colour Morphs in Females of the Polymorphic Tawny Dragon Lizard, Ctenophorus decresii.
Many colour polymorphisms are present only in one sex, usually males, but proximate mechanisms controlling the expression of sex-limited colour polymorphisms have received little attention. Here, we test the hypothesis that artificial elevation of testosterone in females of the colour polymorphic…
Also available at: PLOS
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Selection for social signalling drives the evolution of chameleon colour change.
Rapid colour change is a remarkable natural phenomenon that has evolved in several vertebrate and invertebrate lineages. The two principal explanations for the evolution of this adaptive strategy are (1) natural selection for crypsis (camouflage) against a range of different backgrounds and (2)…
Also available at: PLOS
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Cyclic colour change in the bearded dragon Pogona vitticeps under different photoperiods.
The ability to change colour rapidly is widespread among ectotherms and has various functions including camouflage, communication and thermoregulation. The process of colour change can occur as an aperiodic event or be rhythmic, induced by cyclic environmental factors or regulated by internal…
Also available at: PLOS
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The gender gap in science: How long until women are equally represented?
Women comprise a minority of the Science, Technology, Engineering, Mathematics, and Medicine (STEMM) workforce. Quantifying the gender gap may identify fields that will not reach parity without intervention, reveal underappreciated biases, and inform benchmarks for gender balance among conference…
Also available at: PLOS
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Meta-analytic evidence that sexual selection improves population fitness
Sexual selection has the potential to either increase or decrease absolute fitness. Here, Cally et al. perform a meta-analysis of 65 experimental evolution studies and find that sexual selection on males tends to increase fitness, especially in females evolving under stressful conditions.
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From Bioinspired to Bioinformed: Benefits of Greater Engagement From Biologists
Bioinspiration and biomimetics is a rapidly growing field where insights from biology are used to solve current design challenges. Nature provides an abundance of inspiration to draw upon, yet biological information is under-exploited due to a concerning lack of engagement from biologists. To…
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Red vision in animals is broadly associated with lighting environment but not types of visual task
Abstract Red sensitivity is the exception rather than the norm in most animal groups. Among species with red sensitivity, there is substantial variation in the peak wavelength sensitivity (λmax) of the long wavelength sensitive (LWS) photoreceptor. It is unclear whether this variation can be…
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Does predation risk affect mating behavior? An experimental test in dumpling squid (Euprymna tasmanica).
One of the most important trade-offs for many animals is that between survival and reproduction. This is particularly apparent when mating increases the risk of predation, either by increasing conspicuousness, reducing mobility or inhibiting an individual's ability to detect predators. Individuals…
Also available at: PLOS
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Spatial and temporal variation in prey color patterns for background matching across a continuous heterogeneous environment
Abstract In heterogeneous habitats, camouflage via background matching can be challenging because visual characteristics can vary dramatically across small spatial scales. Additionally, temporal variation in signaling functions of coloration can affect crypsis, especially when animals use…
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Exposure to thermal extremes favors higher solar reflectivity in intertidal gastropods
Summary: During low tides, intertidal animals can be exposed to extreme temperatures that can exceed the animals’ thermal limits. Reflectance of solar radiation could be critical to prevent overheating for animals exposed to the sun; however, most studies ignore near-infrared (NIR) wavelengths that…
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Conserved visual sensitivities across divergent lizard lineages that differ in an ultraviolet sexual signal
Abstract The sensory drive hypothesis predicts the correlated evolution of signaling traits and sensory perception in differing environments. For visual signals, adaptive divergence in both color signals and visual sensitivities between populations may contribute to reproductive isolation and…
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Riboflavin: a potentially important skin pigment in reptilesRiboflavin: a potentially important skin pigment in reptiles
AbstractPigments not only contribute to the extraordinary diversity of animal coloration but also play vital physiological roles. Riboflavin, or vitamin B2, is a macronutrient essential for cellular metabolism and growth, and is a well-known yellow pigment produced industrially for a wide range of…
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Multiple Fitness Benefits of Polyandry in a Cephalopod
Background: Sex differences in reproductive investment play a crucial role in sexual conflict. One intriguing aspect of sexual conflict is the evolution of female multiple mating (polyandry), particularly in systems where females receive no obvious direct benefits from males, and where mating is…
Also available at: DOAJ