Interview with Edmund Brodie, who studies how interactions among genes, individuals, and species drive evolutionary change at the Mountain Lake Biological Station, University of Virginia.
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| http://dx.doi.org/10.1016/j.cub.2021.09.026 | DOI Listing |
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Milk provisioning in oviparous caecilian amphibians.
Science
March 2024
Laboratório de Biologia Estrutural, Instituto Butantan, São Paulo 05503-900, Brazil.
Among vertebrates, the yolk is commonly the only form of nutritional investment offered by the female to the embryo. Some species, however, have developed parental care behaviors associated with specialized food provisioning essential for offspring survival, such as the production of lipidic-rich parental milk in mammals. Here, we show that females of the egg-laying caecilian amphibian provide similarly lipid-rich milk to altricial hatchlings during parental care.
View Article and Find Full Text PDFCoevolution with toxic prey produces functional trade-offs in sodium channels of predatory snakes.
bioRxiv
December 2023
University of Nevada, Reno, Department of Biology, Reno, Nevada, USA, 89557.
Article Synopsis
- Traits can have molecular mechanisms that link them, leading to trade-offs where improving one trait may hinder another, affecting evolution.
- * In garter snakes, resistance to tetrodotoxin (TTX), a toxin from their newt prey, is achieved through specific mutations in muscle sodium channels, but these mutations also compromise basic sodium functions.
- * These mutations result in reduced muscle performance in the snakes, demonstrating that adaptations for toxin resistance can come with significant costs, impacting their overall effectiveness and evolutionary success in the predator-prey dynamic.
AbstractSocial behaviors vary among individuals, and social networks vary among groups. Understanding the causes of such variation is important for predicting or altering ecological processes such as infectious disease outbreaks. Here, we ask whether age contributes to variation in social behavior at multiple levels of organization: within individuals over time, among individuals of different ages, among local social environments, and among populations.
View Article and Find Full Text PDFMultilevel selection on social network traits differs between sexes in experimental populations of forked fungus beetles.
Evolution
January 2023
Biology Department, Swarthmore College, Swarthmore, PA, United States.
Both individual and group behavior can influence individual fitness, but multilevel selection is rarely quantified on social behaviors. Social networks provide a unique opportunity to study multilevel selection on social behaviors, as they describe complex social traits and patterns of interaction at both the individual and group levels. In this study, we used contextual analysis to measure the consequences of both individual network position and group network structure on individual fitness in experimental populations of forked fungus beetles (Bolitotherus cornutus) with two different resource distributions.
View Article and Find Full Text PDFConspicuous coloration of toxin-resistant predators implicates additional trophic interactions in a predator-prey arms race.
Mol Ecol
August 2023
Department of Biology, University of Virginia, Charlottesville, Virginia, USA.
Antagonistic coevolution between natural enemies can produce highly exaggerated traits, such as prey toxins and predator resistance. This reciprocal process of adaptation and counter-adaptation may also open doors to other evolutionary novelties not directly involved in the phenotypic interface of coevolution. We tested the hypothesis that predator-prey coevolution coincided with the evolution of conspicuous coloration on resistant predators that retain prey toxins.
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