Journal of thermal biology最新文献

{"title":"Temperature alters thermal tolerance and physiological response to simulated angling in paddlefish","authors":"Shasta R. Kamara ,&nbsp;Jackson C. Glomb ,&nbsp;Cory D. Suski","doi":"10.1016/j.jtherbio.2025.104272","DOIUrl":"10.1016/j.jtherbio.2025.104272","url":null,"abstract":"<div><div>Global climate change has led to the decline of many recreational and commercial fish species. American Paddlefish (<em>Polyodon spathula</em>) support important fisheries across the United States and can experience angling and release across a range of temperatures due to current management regulations. Currently, the impact of thermal variation on paddlefish has not been defined, precluding managers from making thermally-informed decisions related to the timing and duration of angling and harvest seasons. Therefore, we quantified the response of paddlefish chased to exhaustion and air-exposed across a range of temperatures. To accomplish this, juvenile paddlefish were acclimated to 13, 17.5, and 22 °C. Fish were then subjected to a simulated angling interaction and allowed to recover for 0.5 h, 4 h, or 8 h to evaluate recovery of physiological parameters. Following exercise, recovery profiles differed among acclimation temperatures, with paddlefish acclimated to the warmest temperature (22 °C) having prolonged recovery of plasma lactate, compared to fish experiencing cooler temperatures (13.0 °C and 17.5 °C). A second group of paddlefish from each temperature was subjected to a critical thermal maximum test (CT_max). Paddlefish CT_max was influenced by acclimation temperature, but experienced an upper thermal limit, with fish gaining a small but non-significant increase in thermal tolerance when acclimated to temperatures above 17.5 °C. Together, results indicate that paddlefish experiencing warmer water temperatures have reduced performance relative to cooler fish, suggesting that angling or release at temperatures over 17.5 °C will result in an extended recovery period, and paddlefish may have limited capacity for acclimation to warmer temperatures.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"133 ","pages":"Article 104272"},"PeriodicalIF":2.9,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145091991","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}

{"title":"Skin temperature thresholds: A novel non-invasive potential tool for estimating ventilatory thresholds","authors":"Xianxiang Zeng ,&nbsp;Chunxue Tang ,&nbsp;Yuxiao Deng ,&nbsp;Yanyan Zhang ,&nbsp;Lijun Shi","doi":"10.1016/j.jtherbio.2025.104256","DOIUrl":"10.1016/j.jtherbio.2025.104256","url":null,"abstract":"<div><h3>Background</h3><div>Developing non-invasive, practical methods to identify exercise metabolic thresholds remains a key focus in exercise physiology. This study examined the variation patterns of average skin temperature (aT_sk) measured by infrared thermography during a ramp incremental exercise test (RIET) and determined skin temperature thresholds (TSKTs) to assess their agreement with ventilatory thresholds (VTs).</div></div><div><h3>Methods</h3><div>Twenty-three active college students performed a RIET. Physiological parameters including aT_sk, oxygen uptake (<span><math><mover><mi>V</mi><mo>˙</mo></mover><msub><mi>O</mi><mn>2</mn></msub></math></span>), heart rate (HR), and power output (PO), were recorded. Paired-sample t-tests, Pearson correlation (<em>r</em>), Intraclass Correlation Coefficient (<em>ICC</em>) and <em>Bland-Altman</em> were used to assess the agreement between TSKTs and VTs. The TSKTs comprised the first (TSKT1) and second (TSKT2) skin temperature thresholds.</div></div><div><h3>Results</h3><div>1) aT_sk remained stable initially, then declined (TSKT1), and finally slowed or rebounded (TSKT2). 2) No significant differences were observed between VTs and TSKTs in <span><math><mover><mi>V</mi><mo>˙</mo></mover><msub><mi>O</mi><mn>2</mn></msub></math></span>, HR, or PO (<em>P</em> &gt; 0.05). 3) At the levels of absolute <span><math><mover><mi>V</mi><mo>˙</mo></mover><msub><mi>O</mi><mn>2</mn></msub></math></span> (<span><math><mover><mi>V</mi><mo>˙</mo></mover><msub><mi>O</mi><mn>2</mn></msub><mtext>ab</mtext></math></span>), relative <span><math><mover><mi>V</mi><mo>˙</mo></mover><msub><mi>O</mi><mn>2</mn></msub></math></span> (<span><math><mover><mi>V</mi><mo>˙</mo></mover><msub><mi>O</mi><mn>2</mn></msub><mtext>re</mtext></math></span>), HR and PO, TSKT1 exhibited moderate agreement with VT1, with <em>ICC</em> (0.587, 0.432, 0.430 and 0.525) and <em>r</em> &gt; 0.40 (<em>P</em> &lt; 0.05). TSKT2 showed moderate to high agreement with VT2 for <span><math><mover><mi>V</mi><mo>˙</mo></mover><msub><mi>O</mi><mn>2</mn></msub><mtext>ab</mtext></math></span> (<em>ICC</em>: 0.774, <em>r</em>: 0.778) (<em>P</em> &lt; 0.01), <span><math><mover><mi>V</mi><mo>˙</mo></mover><msub><mi>O</mi><mn>2</mn></msub></math></span> re (<em>ICC</em>: 0.433, <em>r</em>: 0.449) (<em>P</em> &lt; 0.05), and PO (<em>ICC</em>: 0.770, <em>r</em>: 0.784) (<em>P</em> &lt; 0.01), while no significant agreement and correlation was found for HR (<em>P</em> &gt; 0.05).</div></div><div><h3>Conclusion</h3><div>TSKTs identified during RIET exhibited moderate to high reliability in estimating VTs and may serve as a potential tool for VTs assessment.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"133 ","pages":"Article 104256"},"PeriodicalIF":2.9,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145081129","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}

{"title":"Genetic polymorphism in the HSP90AA1 gene revealed in indigenous cattle adapted to tropical coastal climate","authors":"Kumudinee Shivankar ,&nbsp;Amiya Ranjan Sahu ,&nbsp;Gokuldas P.P ,&nbsp;Nibedita Nayak ,&nbsp;Veeranna Gowda","doi":"10.1016/j.jtherbio.2025.104273","DOIUrl":"10.1016/j.jtherbio.2025.104273","url":null,"abstract":"<div><div>Heat stress proteins are important factors in protecting the cells of animals and humans against environmental stress, leading to cellular homeostasis. Zebu cattle are well known for the prevalence of novel mutations responsible for heat tolerance. Hence, the study was carried out to identify single nucleotide polymorphisms in the heat shock protein gene (HSP90AA1) in Shweta Kapila, Sahiwal, Gir and Malnad Gidda cattle breeds adapted to hot and humid coastal climate. Blood samples were collected and genomic DNA amplified for HSP90AA1 gene using designed oligonucleotide primers and sequenced. Rectal temperature and respiration rate both were observed elevated during the hot period compared to the cold period. Sequence data of all the amplified regions of HSP90 gene was analyzed using EditSeq and SeqMan of LASERGENE software. The analysis of custom sequencing data unveiled the presence of ten novel Single Nucleotide Polymorphisms SNPs) located at g.G4733C, g.C4765A and g.A4848G in 3′ UTR; g.C1012T and g.A1209G in exon 3; g.C1300T in intron 3; g.C2245T and g.T2266G in exon 5; and g.T3814A and g.G4212T in exon 10. The identified SNPs were genotyped by PCR-RFLP (<em>Aci</em>I and <em>Hpy</em>CH4III enzymes) and Tetra-primer ARMS-PCR. Genotypic and allelic frequencies for the regions ranged between 0.094 and 0.760, and 0.2645 to 0.7355, respectively. This was the novel report of genetic variations in the HSP90AA1 gene in selected indigenous cattle breeds of India adapted to hot and humid coastal climates. Further studies with large sample sizes are needed to genotype the loci for their significant effect on thermotolerance ability in cattle.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"133 ","pages":"Article 104273"},"PeriodicalIF":2.9,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145061439","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}

{"title":"Thermal tolerance and metabolic scope of Sphoeroides annulatus juveniles, a fish with aquaculture potential","authors":"Ruth Garcia-Villarreal ,&nbsp;Ana Denise Re-Araujo ,&nbsp;J. Pablo Sánchez-Ovando ,&nbsp;Leonardo Ibarra-Castro ,&nbsp;Melany Sánchez-González ,&nbsp;Fernando Díaz","doi":"10.1016/j.jtherbio.2025.104274","DOIUrl":"10.1016/j.jtherbio.2025.104274","url":null,"abstract":"<div><div>Ocean warming, driven by current anthropogenic climate change, affects the physiological responses of marine ectotherms, including <em>Sphoeroides annulatus</em> (bullseye puffer fish), a fish with aquaculture potential. This subtropical-tropical fish inhabits shallow estuarine and coastal environments along the eastern Pacific and is exposed to extreme temperature fluctuations and marine heatwaves, which may threaten its distribution and cultivation. This study aimed to determine thermal tolerance (CT_max and CT_min), thermal polygon area, acclimation capacity via the acclimation response ratio (ARR), thermal safety margins (TSM), and plasticity of the thermal metabolic scope (TMS) of <em>S. annulatus</em> juveniles. Prior to experiments, juveniles (N = 300) were acclimated to five temperatures (20, 23, 26, 29, and 32 °C ± 1 °C) for 30 days. CT_max ranged from 37.8 to 41.4 °C and CT_min from 12.0 to 18.7 °C. The thermal polygon area (293.0°C²) indicated moderately eurythermal behavior, consistent with the species’ broad distribution. ARR values ranged from 0.2 to 0.4 for CT_max and 0.1 to 0.9 for CT_min, suggesting greater plasticity to cold than to warm conditions. Present and future TSM estimates suggest that <em>S. annulatus</em> populations in tropical zones may be more vulnerable to ocean warming than those in subtropical regions. The highest TMS values—an indicator of aerobic capacity—were observed in juveniles acclimated at 23–26 °C, indicating that this temperature range may represent a thermally favorable condition for maximizing aerobic performance. This study provides insight into the physiological limits of <em>S. annulatus</em> under ocean warming conditions and helps define optimal conditions to improve juvenile growth in aquaculture systems.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"133 ","pages":"Article 104274"},"PeriodicalIF":2.9,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145097796","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}

{"title":"Is a warmer environment better for a high-mountain lizard?","authors":"Mirna C. Vera-Chávez ,&nbsp;Donald B. Miles ,&nbsp;Diego M. Arenas-Moreno ,&nbsp;Fausto R. Méndez-de la Cruz","doi":"10.1016/j.jtherbio.2025.104265","DOIUrl":"10.1016/j.jtherbio.2025.104265","url":null,"abstract":"<div><div>The global increase in temperatures threatens the survival of lizards in habitats with broad thermal oscillations. Viviparous populations in high mountains (sky islands) often exhibit a greater thermal tolerance, a trait that, according to Janzen's Hypothesis, is favored by these environments. This raises the question of whether such an adaptation can help them cope with global warming more effectively than populations at lower elevations. To investigate this, we translocated <em>Sceloporus bicanthalis</em> from its native habitat at 4100 m (the species occupy elevations between 2500 and 4250 m) to a lower elevation of 2060 m, simulating a temperature increase. During a 45-day acclimatisation experiment, we measured thermophysiological traits and locomotor performance in pre-acclimatisation (in their native habitat) and post-acclimatisation individuals (at the lower-elevation site). Although we found no changes in thermal limits, the effectiveness of thermoregulation (<em>E</em>) was greater in the pre-acclimatisation group. Translocated individuals showed an increase in maximum sprint speed (<em>Vmax</em>), while the optimal performance temperature (<em>Topt</em>) remained constant in both groups and coincided with their preferred temperature range. Our study demonstrated that, far from being a strict thermal specialist, the thermal physiology of <em>S. bicanthalis</em> allows it to persist in habitats with warmer thermal conditions, evidencing a greater thermal tolerance and suggesting sufficient physiological plasticity to cope with increasing ambient temperatures.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"133 ","pages":"Article 104265"},"PeriodicalIF":2.9,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145061013","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}

{"title":"High temperatures amplify aggressiveness of an invasive lizard toward a native congener","authors":"Julie E. Rej,&nbsp;Alex R. Gunderson","doi":"10.1016/j.jtherbio.2025.104257","DOIUrl":"10.1016/j.jtherbio.2025.104257","url":null,"abstract":"<div><div>Invasive species cause major disturbances to endemic wildlife and often displace native species. Behavioral aggression can contribute to invasive species success, but little is known about how temperature and aggression interact. We tested for effects of temperature on interspecific aggression between the invasive brown anole lizard (<em>Anolis sagrei</em>) and a native congener, the green anole (<em>A. carolinensis</em>). <em>Anolis sagrei</em> displaces <em>A. carolinensis</em> from perch sites in sympatry, which is hypothesized to result at least in part from higher levels of aggression. We tested hypotheses about the temperature-dependence of interspecific aggression across five ecologically relevant temperature regimes that span cool spring to hot summer conditions. Additionally, we tested whether the presence of <em>A. sagrei</em> disrupts <em>A. carolinensis</em> thermoregulation. The invasive <em>Anolis sagrei</em> was more aggressive than <em>A. carolinensis</em> in all temperature regimes. In addition, the difference in aggression between the species was greatest at high temperatures. In contrast, we found little evidence that <em>A. carolinensis</em> thermoregulation is affected by <em>A. sagrei</em>. Our results indicate that the effects of an invasive lizard on a native competitor may be facilitated by high levels of aggression that could be amplified with rising temperatures. Overall, our results are consistent with aggression facilitating invasive species success, and that the effect can be amplified under climate change.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"133 ","pages":"Article 104257"},"PeriodicalIF":2.9,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145086495","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}

{"title":"Season and temperature-humidity index affect sperm quality and in vivo fertility of beef bulls","authors":"Larysse A. Alves ,&nbsp;Reinaldo F. Cooke ,&nbsp;Marcelo Sant’Ana Borges ,&nbsp;Fabiana F. Souza ,&nbsp;John P. Kastelic ,&nbsp;André M. Crespilho","doi":"10.1016/j.jtherbio.2025.104271","DOIUrl":"10.1016/j.jtherbio.2025.104271","url":null,"abstract":"<div><div>Increased temperature and humidity can reduce sperm quality and fertility of bulls. The objective was to evaluate effects of season and temperature-humidity index (THI) on quality of sperm collected from <em>Bos taurus, Bos indicus</em> and crossbred beef bulls and its fertility in fixed-time artificial insemination (FTAI) programs, considering season and THI at semen collection and 30 d before collection. Semen was collected and processed in Botucatu, SP, Brazil, between 2020 and 2022; there were 120 bulls from three breeds (Angus, Brangus, and Nelore). Frozen-thawed semen was used for fixed-time artificial insemination on 63 farms in southern, southeastern, and central-western Brazil, with 26,800 pregnancy records (5129 from Angus semen; 1217 from Brangus; and 20,454 from Nelore). Season and THI affected (P &lt; 0.05) sperm quality characteristics (fresh and frozen-thawed) and pregnancy rates. In summer, high THI negatively affected pre- and post-cryopreservation characteristics of Angus sperm, whereas sperm from Brangus and Nelore bulls were less affected; with high THI, sperm from Nelore bulls had the best quality, both before and after freezing. Pregnancy rates were highest with semen processed in winter (Angus and Nelore) or spring (Brangus). With semen processed in the summer or with the highest THI, Brangus and Nelore bulls had significantly higher pregnancy rates than Angus. In conclusion, Angus bulls were more sensitive to heat stress during the summer and high THI conditions, with significant reductions in fresh and post-thaw semen quality. Results were attributed to Brangus and Nelore sires being better adaptated to high THI, sustaining semen quality and fertility in all seasons under in a subtropical climate.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"133 ","pages":"Article 104271"},"PeriodicalIF":2.9,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156453","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}

{"title":"When spring becomes summer: global warming modifies seasonal patterns of thermoregulatory behaviour in a heliothermic lizard","authors":"José A. Díaz ,&nbsp;Alejandro Llanos-Garrido","doi":"10.1016/j.jtherbio.2025.104243","DOIUrl":"10.1016/j.jtherbio.2025.104243","url":null,"abstract":"<div><div>In heliothermic lizards, thermoregulatory strategies differ seasonally: in spring, activity is shorter, with frequent shuttling between sun and shade; in summer, activity starts earlier, with more shade-seeking at midday. We hypothesized that elevated spring temperatures caused by global warming might elicit ‘summer-like’ behaviours earlier in the season. To test this hypothesis, we compared data collected for our model species, the lacertid lizard <em>Psammodromus algirus</em>, in May 2022 –a post-warming spring– with identical measurements from May and July 1997 in the same Mediterranean open forest. Preferred temperatures measured in a laboratory thermal gradient (T_sel) were higher in May 2022 than in May 1997, approaching July 1997 values. Field body temperatures in May 2022 were also higher, less variable (higher precision), and closer to T_sel (higher accuracy) than in May 1997; thermoregulatory effectiveness (the extent to which body temperatures are closer to T_sel than are operative temperatures) was likewise greater in May 2022. For all these variables, post-hoc tests revealed significant differences between May 2022 and May 1997, but not between May 2022 and July 1997. Activity began 1 h later in May 1997 compared to the other periods. Microhabitat use in May 2022 (full sun, filtered sun, full shade) closely resembled July 1997, but differed markedly from May 1997, when patch selection contributed least to thermoregulation. These findings suggest that hotter spring conditions under climate warming can enhance thermoregulatory accuracy, precision, and effectiveness to previously unsurpassed levels, provided that shaded microhabitats remain thermally suitable (i.e., below the upper limit of T_sel).</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"133 ","pages":"Article 104243"},"PeriodicalIF":2.9,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145048675","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}

{"title":"Real-time estimation of the temperature field for invasive laser-induced thermal therapy employing a Kalman filter","authors":"Zhenbiao Li ,&nbsp;Hong Chen ,&nbsp;Yalan Ji ,&nbsp;Guangjun Wang","doi":"10.1016/j.jtherbio.2025.104258","DOIUrl":"10.1016/j.jtherbio.2025.104258","url":null,"abstract":"<div><div>Laser-induced thermal therapy (LITT) represents a developing, minimally invasive approach used in the practice of oncology, has received attention in the field of therapeutic techniques for malignant tumors. Research and the development of LITT technology rely on the online calculation of a biological tissue's transient thermal field. This paper investigates the online estimation of the temperature field of biological tissues for the invasive LITT process is investigated based on Kalman filter theory. Firstly, thermal conduction model for tissue sample for the invasive LITT process is established based on Penne's biological heat transfer equation and the Beer-Lambert law, and the associated state space model is built on this basis. Subsequently, time-dependent temperature distribution within the tissue of interest is estimated in real-time by integrating the temperature measurement data from a singular measurement point within the treatment site and a state-space representation of thermal transport within tissue sample and KF algorithm. In this paper, the reliability of the constructed state-space representation of thermal transfer within tissue sample is verified with the help of published experimental data on laser irradiation of tissue sample, and the influence of laser radiation form, model mismatch, and the issue of measurement noise when estimating temporary temperature distributions in tissues is discussed through numerical experimentation. The test results indicate that the transient maximal temperature deviation of the estimated temperature field is 0.751 K and 0.731 K under different forms of laser irradiation, respectively, indicating that the scheme in this paper is universal and can effectively estimate the temperature distribution within biological issue under varied optical irradiation forms. When the standard deviation δr of the measurement noise is 0.7 K, the instantaneous error of maximum magnitude pertaining to the estimation of the temperature field is about 0.75 K. The root means square error (<em>RMSE</em>) and <em>MRE</em> of the temperature estimation results are always lower than 0.30 K and 0.5 %. This scheme can provide a more accurate reckon of the inherent thermal distribution in tissue of interest better when model mismatch occurs in the offline link.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"133 ","pages":"Article 104258"},"PeriodicalIF":2.9,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145081063","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}

{"title":"Temperature fluctuations interact with means to impact life history traits in Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae)","authors":"Anchal Padukone,&nbsp;Kimberly S. Sheldon","doi":"10.1016/j.jtherbio.2025.104266","DOIUrl":"10.1016/j.jtherbio.2025.104266","url":null,"abstract":"<div><div>Temperature variability associated with climate change is expected to impact insect performance and alter the ecological and economic impacts of both beneficial and pest species. However, our current understanding of how temperature impacts insect performance is not based on the fluctuating temperatures insects experience in their natural environments or the impact of these fluctuations over the lifespan. Yet, thermal performance curves vary for different organismal traits and life stages, and, thus, understanding the impacts of temperature fluctuations requires measures of multiple traits across the full life cycle. Using fall armyworm <em>Spodoptera frugiperda</em>, a global insect pest, we designed a full factorial experiment with a wide range of temperature treatments to study the effects of temperature mean and fluctuations on survival, development and/or reproduction in each life stage. Our results show interactive effects of mean temperature and the magnitude of daily fluctuations on survival to maturity, development time, and pupal mass as well as on the number of eggs laid by females and subsequent egg hatching. However, the impacts of temperature fluctuation varied across life stages: at the warmest mean temperature, larger fluctuations significantly reduced larval and pupal survival but not adult survival relative to constant temperatures. Our results demonstrate the importance of explicitly considering the biological effects of fluctuating temperatures across traits and life stages since these effects may become more salient under climate warming. Understanding how temperature fluctuations impact the entire life cycle of insects can support more accurate forecasts of insect populations under climate change.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"133 ","pages":"Article 104266"},"PeriodicalIF":2.9,"publicationDate":"2025-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145048674","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}