Journal of Experimental Biology最新文献_第6页

Temporal structure of two call types produced by competing male cicadas. 雄蝉竞争产生的两种叫声的时间结构。

IF 2.8 2区生物学

Journal of Experimental Biology Pub Date : 2025-04-15 Epub Date: 2025-04-22 DOI: 10.1242/jeb.249399

Takahiro Ishimaru, Ikkyu Aihara

{"title":"Temporal structure of two call types produced by competing male cicadas.","authors":"Takahiro Ishimaru, Ikkyu Aihara","doi":"10.1242/jeb.249399","DOIUrl":"https://doi.org/10.1242/jeb.249399","url":null,"abstract":"Male cicadas emit sounds to attract females. The acoustic traits of calls vary among species and show unique patterns that dynamically change, even in the same bout. While the calling behavior of a single cicada has been quantified for many species, the acoustic interaction between two or more cicadas has been examined in only a very few species. In this study, we investigated the acoustic interaction between male cicadas (Meimuna opalifera) that utilize two types of calls. First, we caught cicadas and recorded their calls in the laboratory. Second, we detected the calls of each cicada and classified them into two types based on previous studies: type I calls with short duration and high repetition rate and type II calls with longer duration and low repetition rate. The analysis of the chorus structure demonstrated that: (1) cicadas emitted a type II call soon after another cicada emitted a type I call and (2) they sometimes switched call types with each other. Furthermore, we tested the hypothesis that such a timing strategy allowed the cicadas to effectively make call overlap with the signals of competitors compared with the random production of type II calls. Our analysis combining empirical data and simulation did not support the hypothesis (i.e. good overlapping performance was significant for only two of 23 males). While this study revealed a new type of the well-organized chorus structure in M. opalifera, its function, including a possible masking effect, needs to be further examined.","PeriodicalId":15786,"journal":{"name":"Journal of Experimental Biology","volume":"228 8","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144012440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Arousal from hibernation increases blood oxygen saturation in 13-lined ground squirrels. 从冬眠中醒来会增加13纹地松鼠的血氧饱和度。

IF 2.8 2区生物学

Journal of Experimental Biology Pub Date : 2025-04-15 Epub Date: 2025-04-28 DOI: 10.1242/jeb.249830

Brynne M Duffy, Catherine M Ivy, James F Staples

{"title":"Arousal from hibernation increases blood oxygen saturation in 13-lined ground squirrels.","authors":"Brynne M Duffy, Catherine M Ivy, James F Staples","doi":"10.1242/jeb.249830","DOIUrl":"10.1242/jeb.249830","url":null,"abstract":"Hibernating Ictidomys tridecemlineatus, 13-lined ground squirrels, are considered models of ischaemia-reperfusion tolerance, as both tissues and isolated mitochondria withstand anoxia followed by rapid re-oxygenation in vitro. This tolerance is likely adaptive, protecting against damage during the numerous arousals from torpor throughout the hibernation season. O2 availability is likely low during torpor, but suppressed metabolism lowers O2 demand, potentially mitigating hypoxic stress. During arousal to interbout euthermia (IBE), heart rate, blood pressure and ventilation increase rapidly, suggesting increased O2 availability, but tissue oxygenation has not been measured during arousal or IBE in 13-lined ground squirrels. Using pulse-oximetry collars, we characterized dramatic increases in O2 availability during arousal; carotid artery O2 saturation rose from as low as 35% early in arousal to 87% during IBE. These changes closely followed rising heart rate. Our results demonstrate that hibernating 13-lined ground squirrels survive profound O2 deprivation early in arousal and rapid O2 influx as arousal progresses.","PeriodicalId":15786,"journal":{"name":"Journal of Experimental Biology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12079662/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143719740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dietary modification of membrane composition mimics characteristics of thermal acclimation in the eastern newt (Notophthalmus viridescens). 饲料中膜成分的改变模拟了东部蝾螈（Notophthalmus viri下降）的热适应特征。

IF 2.8 2区生物学

Journal of Experimental Biology Pub Date : 2025-04-15 Epub Date: 2025-04-22 DOI: 10.1242/jeb.249613

Patrick M Mineo, Cameron J World, T A Morris, Nancy J Berner

{"title":"Dietary modification of membrane composition mimics characteristics of thermal acclimation in the eastern newt (Notophthalmus viridescens).","authors":"Patrick M Mineo, Cameron J World, T A Morris, Nancy J Berner","doi":"10.1242/jeb.249613","DOIUrl":"10.1242/jeb.249613","url":null,"abstract":"Acclimation in response to seasonal temperature fluctuations is well described across animal taxa. Our previous studies on adult eastern red spotted newts have demonstrated that winter- or cold-acclimated newts prefer lower cloacal temperatures, have higher standard metabolic rates (SMRs), exhibit higher skeletal muscle cytochrome c oxidase (CCO) and citrate synthase (CS) activity, and possess membranes composed of elevated polyunsaturated fatty acid (PUFA) content compared with skeletal muscle of summer- or warm-acclimated newts. Acclimation to cold also results in partial compensation of locomotor performance. Additionally, northern populations have higher CS and CCO activity and a higher degree of membrane unsaturation compared with southern populations regardless of acclimation conditions. In the present study, we tested the hypothesis that modification of membrane fatty acid composition mimics characteristics of thermal acclimation. We modified membrane composition in newts independent of environmental temperature by feeding them diets differing in fatty acid composition (saturated, monounsaturated, and n3 or n6 PUFA diets) and measured CCO and CS activity, SMR, preferred cloacal temperature, locomotor performance and thermal tolerance. Here, we present data suggesting that a diet-mediated elevation of PUFA in tissue membranes results in lower preferred body temperature, increased metabolic rate, increased burst speed at low temperature and decreased burst speed at high temperature. This introduces an ectothermic vertebrate model system that acclimates characteristics across levels of biological organization in which we can effectively uncouple membrane composition from environmental temperature or light cycle, and further suggests that diet may be an important component of thermal acclimation in nature.","PeriodicalId":15786,"journal":{"name":"Journal of Experimental Biology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143657479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Landing on a swinging perch: peach-faced lovebirds prefer extremes. 在摇摆的栖木上着陆：桃子脸的情侣喜欢极端。

IF 2.8 2区生物学

Journal of Experimental Biology Pub Date : 2025-04-15 Epub Date: 2025-04-22 DOI: 10.1242/jeb.249692

Partha S Bhagavatula, Andrew A Biewener

{"title":"Landing on a swinging perch: peach-faced lovebirds prefer extremes.","authors":"Partha S Bhagavatula, Andrew A Biewener","doi":"10.1242/jeb.249692","DOIUrl":"https://doi.org/10.1242/jeb.249692","url":null,"abstract":"Birds frequently must land (safely) on moving branches, and seemingly accomplish this with acrobatic precision. To examine how birds target and land on moving supports, we investigated how lovebirds approach and land on a swinging perch, driven at three sinusoidal frequencies. Flight kinematics were recorded, together with landing forces and pitch torque via a perch-mounted sensor. In support of our hypothesis for stable landings, lovebirds timed half their landings (51.3%) when the perch was approaching either extreme of motion near zero velocity, exhibiting a robust bimodal strategy for landing-phase timing. Horizontal landing forces exceeded vertical forces across all landing conditions, reflecting the shallow flight trajectory (-13.2 deg relative to horizontal) lovebirds adopted to decelerate and land. A uniform body pitch angle (81.9±0.46 deg mean±s.e.m.) characterized landing across all conditions, with lovebirds using the horizontal perch reaction force to assist in braking when landing. Body pitch after landing was not well correlated and was generally opposite to the initial direction and magnitude of landing pitch torque. Flexion of the bird's hindlimb joints at landing reduced landing torque by aligning the bird's center of mass trajectory more closely to the perch. Landing pitch torque and body pitch rotation increased uniformly in response to increased perch swing frequency. In contrast to landing forces, pitch torque varied irregularly across landing conditions. Our results indicate that lovebirds regulate their approach trajectory and velocity to time the phase of landing to a moving perch, providing insight for designing biologically inspired unmanned aerial vehicles capable of landing on moving targets.","PeriodicalId":15786,"journal":{"name":"Journal of Experimental Biology","volume":"228 8","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144028256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An inverse problems approach to micro-PIV for measuring flow around freely flying tiny insects. 用反问题方法测量微小昆虫自由飞行时的流动。

IF 2.8 2区生物学

Journal of Experimental Biology Pub Date : 2025-04-15 Epub Date: 2025-04-24 DOI: 10.1242/jeb.249417

Evan J Williams, John Murray-Bruce, David W Murphy

引用次数: 0

Temperature-driven trade-off between mitochondrial activity and efficiency in live rotifers representing different thermal histories. 代表不同热历史的活轮虫线粒体活性和效率之间的温度驱动权衡。

IF 2.8 2区生物学

Journal of Experimental Biology Pub Date : 2025-04-15 Epub Date: 2025-04-23 DOI: 10.1242/jeb.249338

Agata M Burzawa, Katarzyna B Potera, Eugene P Sokolov, Inna M Sokolova, Aleksandra Walczyńska

{"title":"Temperature-driven trade-off between mitochondrial activity and efficiency in live rotifers representing different thermal histories.","authors":"Agata M Burzawa, Katarzyna B Potera, Eugene P Sokolov, Inna M Sokolova, Aleksandra Walczyńska","doi":"10.1242/jeb.249338","DOIUrl":"10.1242/jeb.249338","url":null,"abstract":"Mitochondria generate up to 90% of cellular ATP, making it critical to understand how abiotic factors affect mitochondrial function under varying conditions. Using clones of the rotifer Lecane inermis with known thermal preferences, we investigated mitochondrial bioenergetic responses to four thermal regimes: standard temperature, optimal temperature, low suboptimal temperature and high suboptimal temperature. The study aimed to determine how mitochondrial parameters in intact organisms vary with temperature shifts and whether these responses differ across experimental populations. We assessed key bioenergetic parameters: routine respiration (representing overall metabolic rate), electron transport system capacity (indicative of oxidative phosphorylation potential) and proton leak rates (reflecting the energetic costs of maintaining mitochondrial membrane potential). Our results showed that populations with different thermal preferences displayed distinct mitochondrial responses to temperature changes, particularly at suboptimal temperatures. In contrast, responses were more uniform under standard and optimal conditions. Our findings demonstrated that metabolic plasticity in changing environments often involves trade-offs between mitochondrial efficiency and maintenance. By studying mitochondrial respiration at the whole-organism level, we revealed the complex temperature dependence of bioenergetic traits, providing insights beyond isolated mitochondria studies. This research highlights how a cascade of plastic responses spanning from mitochondrial responses to overall growth patterns is triggered by temperature changes, offering a valuable perspective in the context of global warming and organismal adaptation.","PeriodicalId":15786,"journal":{"name":"Journal of Experimental Biology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143483244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Behavioral data suggest adaptive buoyancy control during shallow dives in humpback whales. 行为数据表明，座头鲸在浅水潜水时可自适应浮力控制。

IF 2.8 2区生物学

Journal of Experimental Biology Pub Date : 2025-04-15 Epub Date: 2025-04-24 DOI: 10.1242/jeb.249936

Maevatiana Nokoloina Ratsimbazafindranahaka, Olivier Adam, Chloé Huetz, Joy S Reidenberg, Anjara Saloma, Aristide Andrianarimisa, Isabelle Charrier

{"title":"Behavioral data suggest adaptive buoyancy control during shallow dives in humpback whales.","authors":"Maevatiana Nokoloina Ratsimbazafindranahaka, Olivier Adam, Chloé Huetz, Joy S Reidenberg, Anjara Saloma, Aristide Andrianarimisa, Isabelle Charrier","doi":"10.1242/jeb.249936","DOIUrl":"https://doi.org/10.1242/jeb.249936","url":null,"abstract":"Marine mammals have been proposed to have a passively changing buoyancy that influences their swimming efforts depending on the depth, as a result of pulmonary alveolar compression/expansion as ambient pressure changes. Mysticetes have been described to have the same passive mechanism without considering their unique respiratory system, which may provide them with the ability to change their buoyancy actively to enhance vertical movements. Here, we present behavioral evidence supporting that adult mysticetes actively change buoyancy during shallow dives by analyzing diving data from multi-sensor tags placed on humpback whale mother-calf pairs. We show that adult female humpback whales display low effort to swim downward and upward regardless of the depth and can stay perfectly static (stationary) at different depths. In contrast, calves display depth-dependent swimming effort and only remain stationary with external help or at a specific depth. Our study adds to the body of evidence regarding the unique features of mysticetes' dives.","PeriodicalId":15786,"journal":{"name":"Journal of Experimental Biology","volume":"228 8","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144004715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Harnessing physiological research for smarter environmental policy. 利用生理学研究制定更明智的环境政策。

IF 2.8 2区生物学

Journal of Experimental Biology Pub Date : 2025-04-15 DOI: 10.1242/jeb.249867

Alexia Dubuc, Courtney M Burns, Shamil F Debaere, Carmen Dobszewicz, Joel H Gayford, Luca J Hoffecker, Isaac T Marshall, Miriam D Zanforlin, Jodie L Rummer

{"title":"Harnessing physiological research for smarter environmental policy.","authors":"Alexia Dubuc, Courtney M Burns, Shamil F Debaere, Carmen Dobszewicz, Joel H Gayford, Luca J Hoffecker, Isaac T Marshall, Miriam D Zanforlin, Jodie L Rummer","doi":"10.1242/jeb.249867","DOIUrl":"https://doi.org/10.1242/jeb.249867","url":null,"abstract":"Integrating physiological research into environmental policy is crucial for addressing the complex challenges faced by ecosystems. Despite their potential, physiological insights are often underutilised in policy and management decisions, leading to missed opportunities for more targeted and effective conservation strategies. This Perspective explores the role and integration of physiological research within environmental policy. We discuss successful case studies where physiological data have informed policy, as well as the barriers that hinder broader recognition and application of this research. Key challenges include the limited awareness of physiological findings among policymakers, the difficulties in translating complex scientific data into actionable policy, and the gap between physiological studies and ecological relevance. To bridge these gaps, we propose strategies for making physiological research more accessible and impactful, such as fostering interdisciplinary collaborations, enhancing science communication and aligning research with policy needs. We conclude with a call to action for researchers, institutions, policymakers and Indigenous communities - especially Traditional Custodians - to collaborate more closely, advocating for the inclusion of physiological expertise in advisory panels and the development of strategies to better incorporate physiological research into environmental policy. By embracing the insights provided by conservation physiology, we can develop more informed and effective policies that enhance the resilience of ecosystems in the face of rapid environmental change.","PeriodicalId":15786,"journal":{"name":"Journal of Experimental Biology","volume":"228 8","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144003365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Walking with increased step length variability increases the metabolic cost of walking in young adults. 步长变异性增加的步行会增加年轻人步行的代谢成本。

IF 2.8 2区生物学

Journal of Experimental Biology Pub Date : 2025-04-15 Epub Date: 2025-04-24 DOI: 10.1242/jeb.250126

Adam B Grimmitt, Maeve E Whelan, Douglas N Martini, Wouter Hoogkamer

{"title":"Walking with increased step length variability increases the metabolic cost of walking in young adults.","authors":"Adam B Grimmitt, Maeve E Whelan, Douglas N Martini, Wouter Hoogkamer","doi":"10.1242/jeb.250126","DOIUrl":"10.1242/jeb.250126","url":null,"abstract":"Several studies have observed a relationship between step length variability and the metabolic cost of walking. In those studies, changes in step length variability were secondary to changes in walking speed or step width variability. The purpose of this study was to determine how directly increasing step length variability affects the metabolic cost of walking. Eighteen healthy young adults completed 5 min trials of treadmill walking at 1.20 m s-1 while we manipulated their step length variability. Illuminated rectangles were projected onto the surface of a treadmill to cue step length variabilities of 0%, 5% and 10% coefficient of variation. Step length and its variability were tracked with reflective markers on the feet. Metabolic power across habitual (no projections) and the three variability conditions was measured using indirect calorimetry and analyzed using linear mixed effects modeling. Metabolic power was largest in the 10% condition (mean±s.d. 4.30±0.23 W kg-1) compared with 0% (4.16±0.18 W kg-1) and habitual (3.98±0.25 W kg-1). Actual step length variability was significantly different from prescribed conditions: 0%, 3.17±0.64%; 5%, 4.38±0.98% and 10%, 6.94±1.07%. For every 1% increase in step length variability, there was a 1.1% (0.05 W kg-1; P<0.001) increase in metabolic power. Our results demonstrate an association between the metabolic cost of walking and step length variability. This suggests that increased gait variability contributes to a small portion of the increased cost of walking seen in older adults and people with neurological impairments.","PeriodicalId":15786,"journal":{"name":"Journal of Experimental Biology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12045634/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143700564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transcriptomic correlates of nutritional manipulation in a facultatively social bee. 兼性群居蜜蜂营养操纵的转录组学相关。

IF 2.8 2区生物学

Journal of Experimental Biology Pub Date : 2025-04-15 Epub Date: 2025-04-16 DOI: 10.1242/jeb.250024

Jesse L Huisken, Sandra M Rehan

{"title":"Transcriptomic correlates of nutritional manipulation in a facultatively social bee.","authors":"Jesse L Huisken, Sandra M Rehan","doi":"10.1242/jeb.250024","DOIUrl":"10.1242/jeb.250024","url":null,"abstract":"Subsocial behaviour in insects consists of extended parental care and may set the stage for the evolution of cooperation through manipulation of offspring. Manipulation of brood nutrition may produce differences in developmental or adult gene regulation, but it also produces smaller offspring which may be coerced into cooperation. The eastern small carpenter bee Ceratina calcarata frequently produces a smaller under-provisioned dwarf eldest daughter (DED). These DEDs are the only offspring to forage and feed siblings. To test whether nutritional manipulation of DEDs alters gene expression, inducing cooperative sibling care, we conducted a transcriptomic study, using whole heads, to assess differences in brain gene expression among naturally provisioned regular daughters and DEDs, experimentally under-provisioned regular daughters, and experimentally supplemented DEDs, prior to social interaction. Differences in gene expression were minimal among groups but were dramatic as a function of body size as a continuous variable, suggesting that differences in gene expression are more associated with absolute differences in body size, not discrete castes or order of eclosion. Enrichment for GO terms related to hormonal regulation in small bees points to hormonal regulation of transcription factors in behavioural differences that emerge in DEDs. Subordinate behaviours thus likely involve experience and social environment, though other developmental mechanisms, such as parental care, and later adult social interactions after eclosion, may act on differences in body size and gene expression to produce the distinct behaviour of DEDs.","PeriodicalId":15786,"journal":{"name":"Journal of Experimental Biology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12045643/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143649067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0