Ecological and evolutionary physiology最新文献

{"title":"The Effects of Diet Quantity on Developmental Plasticity of Size and Flight Energetics in the Hawk Moth <i>Manduca sexta</i>.","authors":"Eric J Ellison, Ecaterina Facina, Charles-A Darveau","doi":"10.1086/741072","DOIUrl":"10.1086/741072","url":null,"abstract":"<p><p>AbstractThe energy needed for insect flight varies with the size and body proportions of different species or individuals. Wingbeat frequency during flight usually decreases as size increases, though these changes depend on the proportions of the wings and flight muscles. Metabolic rate during flight often changes with wingbeat frequency. Nutrition during development plays a key role in determining an individual's size and body proportions. We used an intermittent feeding regime during the fifth larval instar of the hawk moth (<i>Manduca sexta</i>) to investigate how nutrition-induced size variation affects flight capacity and energetics. Adult body mass decreased with more severe intermittent feeding, widening the range of body mass variation to nearly fivefold. Changes in body mass influenced body proportions through allometric effects, with wing area and thorax mass scaling hypoallometrically, while abdomen mass scaled hyperallometrically. Sex and nutritional treatment further influenced these relationships. The flight wingbeat frequency increased in smaller-sized individuals, and the thorax mass-specific metabolic rate was higher. Smaller individuals from the intermittent feeding treatment also showed a lower flight success, apparently due to a lower thorax-to-abdomen mass ratio. Flight muscle metabolic enzyme activities did not differ with size or nutritional treatment. Overall, changes in body mass and proportions resulting from developmental plasticity influence flight energetics, leading to compromises in flight energy demands and success without notably altering flight muscle metabolic phenotypes, which could restrict muscle power during flight.</p>","PeriodicalId":519900,"journal":{"name":"Ecological and evolutionary physiology","volume":"99 3","pages":"148-158"},"PeriodicalIF":1.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148341665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Proximate Costs of Male-Exclusive Parental Care in the Giant Water Bug, <i>Abedus ovatus</i> (Hemiptera: Belostomatidae).","authors":"César Aparicio-Moreno, Víctor Argaez, Roberto Munguía-Steyer, Bibiana Montoya","doi":"10.1086/741070","DOIUrl":"10.1086/741070","url":null,"abstract":"<p><p>AbstractIn addition to costs mediated by trade-offs in resource allocation, it has also been proposed that reproductive costs may occur because of direct somatic damage. Oxidative stress occurs when reactive oxygen species production overwhelms antioxidant defenses and repair mechanisms. Studies testing the oxidative cost of reproduction hypothesis have found mixed results and have been conducted primarily in female birds and mammals. Therefore, the importance of using other taxonomic groups and males to test this hypothesis during different stages of reproduction has been highlighted. Interestingly, temperature can influence the intensity and duration of parental care provided by ectotherms and hence may exert potential additional costs to parental behavior. Two studies were conducted to evaluate whether there is an oxidative cost of paternal care and whether such a cost would be increased under high temperatures, using male giant water bugs (<i>Abedus ovatus</i>) as a model of study. We found that in the wild, males that carry more eggs have higher levels of lipid peroxidation. However, in the laboratory, we did not find an effect of experimentally increased parental care on lipid peroxidation levels. The discrepancies between our studies suggest that costs of parental care are strongly mediated by the influence of environmental factors, both biotic and abiotic, on the redox status of the parental individuals.</p>","PeriodicalId":519900,"journal":{"name":"Ecological and evolutionary physiology","volume":"99 3","pages":"187-197"},"PeriodicalIF":1.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148341635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Oxygen Isotopes Indicate That Rocky Mountain Mule Deer (<i>Odocoileus hemionus hemionus</i>) Can Be Seasonally Nonobligate Drinkers.","authors":"Zachary T Steele, Karen Caceres, Austin D Jameson, Virginia Stout, David C Stoner, Kent R Hersey, Alexander R Gerson, Seth D Newsome, Mark A Ditmer, John P Whiteman","doi":"10.1086/741663","DOIUrl":"10.1086/741663","url":null,"abstract":"<p><p>AbstractUnderstanding seasonal water budgets of wildlife is critical, as climate change alters water availability. Rocky Mountain mule deer (<i>Odocoileus hemionus hemionus</i>) mainly obtain water from their diet and drinking water; however, winter access to these resources varies with snow cover. To assess reliance on water sources by mule deer during winter, we longitudinally sampled female deer in Utah's Bear River Mountains, a montane region with deep snow and ample drinking water sources, and Pine Valley, a semiarid region with little snow. We implanted physiological biologgers to record heart rate and collected serum samples at the onset and end of winter over 2 yr. We measured the triple oxygen stable isotope composition of a body water sample (Δ'¹⁷O_BW) distilled from serum. We then compared measured Δ'¹⁷O_BW to predictions generated from two isotope models of water and oxygen fluxes that differed in their estimates of metabolic rate, based on either heart rate or body mass. Close agreement between measured and predicted Δ'¹⁷O_BW validated our assumptions, although estimating metabolic rate via heart rate did not improve model predictions. Our results indicate that in the Bear River Mountains, deer increased their water drinking when snow cover limited foraging but that in Pine Valley, they relied on consistent food water input because of minimal snow cover. Estimates suggest that some deer in Pine Valley were seasonally independent from drinking water. Applying Δ'¹⁷O_BW modeling enhances wildlife conservation by providing novel inferences about how individuals obtain water, informing proactive management in the face of climate change.</p>","PeriodicalId":519900,"journal":{"name":"Ecological and evolutionary physiology","volume":"99 3","pages":"170-186"},"PeriodicalIF":1.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148341637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Muscle Fiber Diameter and Myonuclear Domain in Sheepshead Minnows in Response to Chronic Thermal Acclimation Treatments and Acute CT_max Trial: Possible Relevance for Global Temperature Increases.","authors":"Jack Bennink, Evan Nash-Braun, Ana Gabriela Jiménez","doi":"10.1086/741469","DOIUrl":"10.1086/741469","url":null,"abstract":"<p><p>AbstractGiven the predicted increase in average global temperatures and extreme thermal events over the next several decades, establishing a baseline physiological forecast on species' ability to respond to such events is of vital importance. Some sets of species are expected to be of particular vulnerability to these sorts of changes in climate, including ectothermic fish. Temperature acclimations outside a species' optimal range have been shown to have deleterious effects across several tissues in ectothermic fish, with skeletal muscle being particularly vulnerable to temperature. Despite this vulnerability, ectothermic fish muscle tissue demonstrates a clear adaptability to various thermal regimes, with a broad range of acclimation mechanisms being observed. One such acclimation mechanism is the ability to change muscle fiber diameter, which has been identified as a possible response to temperature-associated diffusion constraints. In the current study, we addressed questions regarding the impact of chronic and acute thermal acclimation of ectothermic fish on muscle tissue histology, specifically examining changes to fiber diameter, myonuclear domain, and number of myonuclei per area of fiber, in chronic acclimations of 10°C, 20°C, and 30°C. Following acclimation to these thermal regimes, we initiated subsequent critical thermal maximum (CT_max) trials and collected tissue at three distinct time points for each cohort of minnows. Tissue was sampled from equal numbers of fish before CT_max testing to serve as a control, immediately following loss of equilibrium in the CT_max trial, and after a 1-h period of recovery after the CT_max trial. These specific time points were selected to connect any histological changes with whole-organism performance and determine any acute thermal changes in muscle histology. We then used one-factor ANOVAs to examine differences across temperature groups and time point of collection (control, chronic, and acute acclimation). We found that despite fiber diameter remaining unchanged across all temperatures and acclimation time points, myonuclear domain was decreased following both cold and warm chronic acclimations, indicating a possible response. Understanding these muscular acclimation mechanisms will help predict how vulnerable species can be expected to react to changing temperatures, aiding in their conservation.</p>","PeriodicalId":519900,"journal":{"name":"Ecological and evolutionary physiology","volume":"99 3","pages":"159-169"},"PeriodicalIF":1.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148341654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Behavioral Energetics and the Architecture of Performance: A Perspective on the Influence of Taigen and Wells (1985) and Taigen et al. (1985).","authors":"Carlos A Navas, Catherine R Bevier","doi":"10.1086/741471","DOIUrl":"10.1086/741471","url":null,"abstract":"<p><p>AbstractIn 1985, two seminal publications redefined the study of acoustic communication in frogs. By demonstrating that male frogs expend energy at rates surpassing those of vigorous locomotion when calling (Taigen and Wells 1985) and that these extreme demands are sustained by trunk muscles with oxidative enzyme profiles rivaling endothermic vertebrates (Taigen et al. 1985), they revealed what was then seen as a physiological paradox through an integrative approach that continues to inspire research. Here, we evaluate the scientific legacy of these studies four decades later using curated citation datasets and thematic analyses. We show that their influence has persisted through sustained citation across disciplines. This broad impact appears rooted in their novel integration of behavioral ecology and comparative physiology, two fields they engaged in complementary ways. Early citations emphasized mechanisms such as oxygen consumption, muscle biochemistry, and performance limits, while later work expanded toward processes and patterns, including sexual selection, ecological trade-offs, and environmental modulation of signaling. Subsequent reframings situate frog calling as an evolved strategy embedded in endocrine regulation, phenology, social responsiveness, and ecological change. The Wells-Taigen collaboration thus stands as a rare example of transdisciplinary integration where mechanistic physiology and ecological realism were jointly advanced, catalyzing enduring conceptual synthesis in evolutionary physiology. By revisiting these papers, we highlight how their intellectual lineages continue to scaffold inquiry into performance, adaptation, and the integrated study of animal behavior and its physiological bases.</p>","PeriodicalId":519900,"journal":{"name":"Ecological and evolutionary physiology","volume":"99 3","pages":"137-147"},"PeriodicalIF":1.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148341502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Telomere Length Decreases with Age and Reflects Early-Life Environment but Not Adult Condition in a Long-Lived Migratory Bird.","authors":"Ilona Pélagie Grentzmann, Gilles Gauthier, Frédéric Angelier, Glenn Yannic, Charline Parenteau, Cristoforo Silvestri, Pierre Legagneux","doi":"10.1086/740893","DOIUrl":"10.1086/740893","url":null,"abstract":"<p><p>AbstractWithin species and populations, individuals often differ in their coping styles and more generally in their life history strategies. This heterogeneity in individual life history is classically reflected by variation in physiological performance, survival probabilities, and reproductive success. In many vertebrate species, physiological performance is partially mediated by glucocorticoids and declines with age through senescence, which may be reflected by variation in telomere length. Telomeres are noncoding DNA sequences that typically shorten with age. Their dynamics have been related to oxidative stress and energy allocated to DNA repair mechanisms. In this study, the link between telomere length and several proxies of individual quality was investigated in female greater snow geese, a long-lived migratory species. More specifically, we examined the relationships between telomere length, stress-induced corticosterone (the main avian glucocorticoid), body size, and postbreeding body condition. In goslings, telomere length was highly variable and explained by year of birth. In adult females, our results showed the expected decline of telomere length with age. Telomere length adjusted for age increased with body size but did not vary with body condition or stress-induced corticosterone levels. Conversely, we show that female postbreeding body condition varies with age, increasing until they are 8 yr old and decreasing at a later age. Because body size is primarily determined during development, our results point to telomeres being a good indicator of the conditions experienced during early life. In contrast, it does not seem to be related to the amount of endogenous reserve during adult life. This supports the idea that telomere length could be a reliable marker of early developmental conditions and potentially of individual quality.</p>","PeriodicalId":519900,"journal":{"name":"Ecological and evolutionary physiology","volume":"99 2","pages":"97-110"},"PeriodicalIF":1.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147990750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Differences in Salinity Performance Curves between Two Closely Related <i>Poecilia</i> Species: Implications for Species Turnover along a Salinity Gradient.","authors":"Craig A Marshall, Kyndall R Zeller, Emily A Kane, Lisa M Angeloni, Cameron K Ghalambor","doi":"10.1086/740126","DOIUrl":"10.1086/740126","url":null,"abstract":"<p><p>AbstractMany locomotor traits exhibit predictable variation along environmental gradients, which in turn influence the lower-level cellular and physiological processes that determine whole-organism performance (i.e., performance curves). While the impact of salinity on locomotor performance has been previously studied, few have investigated the ecological consequences of salinity-induced changes in performance. On the island of Trinidad, <i>Poecilia reticulata</i> are confined to freshwater, while the closely related <i>Poecilia picta</i> primarily inhabit lowland brackish water and saltwater. However, both species coexist in a narrow freshwater band at the brackish water interface. Because both species are prey for larger fish and their escape performance is highly correlated with survival, we hypothesized that the different distributional limits could be influenced by the ability to maintain escape performance across a range of salinities. To test this, we assessed how increasing salinity affects escape performance by generating salinity performance curves for these euryhaline species. We subjected both species to a predatory stimulus to elicit an escape response using serial acclimation to increasing levels of salinity (0-18 practical salinity units). We measured (1) latency of response initiation, (2) distance traveled, (3) velocity, and (4) acceleration. We found that the transition from freshwater to brackish water (6 practical salinity units) caused a decline in escape performance for both species. However, <i>P. picta</i> acclimated more rapidly and recovered performance at higher salinities. These results suggest that <i>P. reticulata</i>'s slower acclimation to brackish conditions may contribute to its confinement to freshwater. Moreover, this study emphasizes the value of salinity performance curves for understanding how aquatic organisms may respond to changes in salinity gradients.</p>","PeriodicalId":519900,"journal":{"name":"Ecological and evolutionary physiology","volume":"99 2","pages":"87-96"},"PeriodicalIF":1.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147990691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Who's Coming Home? Shorter Early-Life Telomeres Predict Return to the Natal Colony in an Arctic Seabird.","authors":"Jingqi Corey Liu, Olivier Chastel, Christophe Barbraud, Claus Bech, Pierre Blévin, Paco Bustamante, Børge Moe, Elin Noreen, Frédéric Angelier","doi":"10.1086/740247","DOIUrl":"10.1086/740247","url":null,"abstract":"<p><p>AbstractIn wild animals, the length of their telomeres, the noncoding DNA sequences protecting the ends of chromosomes, in early life has been shown to predict their performance (e.g., survival, reproduction) later in life. However, literature has reported mixed relationships between telomere length (TL) and individual performance, possibly because many previous studies overlooked the effects of the resource-modulated trade-off between growth and telomere maintenance. We investigated the effects of early-life conditions (e.g., sibling competition [one or two chicks] and trophic level [nitrogen isotopic values]) on the TL of black-legged kittiwake (<i>Rissa tridactyla</i>) chicks while accounting for the growth-TL trade-off. We also tested whether early-life TL was related to their return probability to the natal colony within 6 yr after fledging (a proxy of survival to adulthood). Although there was no strong evidence for direct effects of the early-life conditions on TL, we found that in broods of two chicks, larger individuals tended to receive a higher-trophic-level diet and have shorter telomeres. This suggests that sibling competition might have imposed stronger resource constraints on the chicks, making them prioritize the limited resources toward growth at the expense of TL. Surprisingly, we found that chicks with shorter telomeres were more likely to return to their colony, whereas body size was not related to return probability, suggesting that TL may be a more comprehensive predictor of return probability than body size. Therefore, our study supports that early-life TL can be a predictor of later-life performance, but it should be used with caution when considering the effect of the resource allocation trade-off with growth, which can influence the direction of prediction.</p>","PeriodicalId":519900,"journal":{"name":"Ecological and evolutionary physiology","volume":"99 2","pages":"69-86"},"PeriodicalIF":1.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147990769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Whole-Genome Analyses Point to New Candidate Genes Underlying Estivation in Amphibians.","authors":"Leticia M Ochoa-Ochoa, Rebecca D Tarvin","doi":"10.1086/741061","DOIUrl":"10.1086/741061","url":null,"abstract":"<p><p>AbstractWhen amphibians invaded the terrestrial realm, a strategy such as estivation may have helped them survive water and oxygen stress in the novel environment. In fact, estivation appears to be an ancestral state in amphibians. We conducted a literature review about the genes previously linked to estivation, and then we searched for additional candidate genes related to the estivation phenotype by comparing evolutionary rates of 13,578 genes in 31 amphibian species, including 10 estivating species and 21 nonestivating species. Based on the assumption that estivation has two main requirements-(1) metabolic regulation needed to control transitions to/from dormancy and (2) cell preservation strategies needed to sustain biological processes over long-term dormancy-we expected to find distinct relative evolutionary rates (RERs) in genes related to those traits. We identified 323 genes with accelerated or decelerated RERs; these genes were enriched for some processes overlapping with our predictions and with literature findings, such as different modes of ATP production. Other genes related to protein and membrane trafficking (TRAPP, SNARE, and Arp2/3 complexes) are newly associated with estivation. RER patterns suggest that estivation in amphibians relies on a set of highly conserved core processes and other auxiliary processes that have diversified across the phylogeny. Given the vast number and diversity of estivating amphibian lineages, we predict that more in-depth molecular studies of amphibian estivation will offer novel insight into hypometabolic processes that could inspire medical innovations to prevent organ atrophy, address problems with angiogenesis, and combat processes underlying cancer.</p>","PeriodicalId":519900,"journal":{"name":"Ecological and evolutionary physiology","volume":"99 2","pages":"111-136"},"PeriodicalIF":1.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13259583/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147990788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Does the Evolution of Predatory Behavior Alter Stress Response? Insights from a Selection Experiment on Bank Voles.","authors":"Gokul Bhaskaran, Jella Wauters, Paweł Koteja, Edyta T Sadowska","doi":"10.1086/740045","DOIUrl":"10.1086/740045","url":null,"abstract":"<p><p>AbstractThe ability to cope with challenging situations, such as the predator-prey interactions, can determine Darwinian fitness. While many studies are concerned with the stress response of prey facing a predator, the stress response of the predator remains unstudied. We hypothesized that evolution of the predatory lifestyle involves adaptive changes in hypothalamic-pituitary-adrenal (HPA) axis regulation and tested this using an experimental evolution model comprising lines of bank voles (<i>Clethrionomys</i> = <i>Myodes glareolus</i>) selected for predatory behavior toward crickets (P lines) and unselected control (C) lines. We measured plasma corticosterone after a cricket-hunting test and a sham test, where the voles experienced identical conditions but without prey. We expected that test conditions would affect corticosterone levels differently depending on the selection line type. However, the effects depended on sex. In males, corticosterone levels were lower than in females and did not differ between selection lines or test types. In females, both factors influenced corticosterone levels: after the sham hunting test, corticosterone levels were higher in P lines than in C lines, suggesting an increased alertness and mobilization. Compared to the sham hunting test, corticosterone levels after the cricket-hunting tests tended to be lower in P lines but higher in C lines. These results suggest that at least in females, the selection for predatory behavior has adaptively altered HPA axis regulation. Given the complexity of the HPA axis, and in particular the role of corticosterone, our study has an exploratory rather than a confirmatory nature, but it opens the prospect for a research direction not yet explored.</p>","PeriodicalId":519900,"journal":{"name":"Ecological and evolutionary physiology","volume":"99 1","pages":"56-68"},"PeriodicalIF":1.7,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147349435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}