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Niitepõld K. Resting Metabolic Rate Does Not Predict Peak Metabolic Rate in the Glanville Fritillary Butterfly. Integr Comp Biol 2024; 64:576-585. [PMID: 38942463 DOI: 10.1093/icb/icae085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 06/22/2024] [Accepted: 06/23/2024] [Indexed: 06/30/2024] Open
Abstract
Peak metabolic rate reflects maximal performance and may have direct fitness consequences, whereas resting metabolic rate (RMR) represents the maintenance cost of the whole animal. These traits may be linked, which has significant implications for the evolution of both traits. In vertebrates, a positive correlation between RMR and aerobic capacity has been proposed to explain the origin of endothermy. However, as studies on the relationship between RMR and aerobic capacity have focused on vertebrates, we know much less about these traits in ectothermic insects. I measured RMR in the Glanville fritillary butterfly (Melitaea cinxia) using two configurations: one optimized for measuring flight metabolic rate and the other optimized for RMR. The relationship between RMR and body mass was similar for the two configurations. Body mass explained 82% of the variation in RMR when it was measured using the "flight" configuration at 32°C, and 91% when using the "rest" configuration at 23°C. The Q10 coefficient calculated based on the two RMR measurements was 2.8. Mass-independent RMR was positively correlated between measurements obtained using the two instrument configurations. However, neither measure of RMR was correlated with peak metabolic rate, which indicates that RMR cannot be used as a surrogate measure for aerobic capacity in the Glanville fritillary. Ectothermic insects may be able to combine high metabolic capacity with no apparent increase in maintenance cost. Even though RMR is among the most frequently measured physiological variables, it may have limited predictive power when it comes to questions related to activity or aerobic capacity, or in the case of butterflies, flight performance.
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Affiliation(s)
- Kristjan Niitepõld
- Department of Biosciences, Metapopulation Research Centre, P.O. Box 65 (Viikinkaari 1), 00014, University of Helsinki, Finland
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2
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Rakhshaninejad M, Zheng L, Nauwynck H. Shrimp (Penaeus vannamei) survive white spot syndrome virus infection by behavioral fever. Sci Rep 2023; 13:18034. [PMID: 37865676 PMCID: PMC10590431 DOI: 10.1038/s41598-023-45335-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 10/18/2023] [Indexed: 10/23/2023] Open
Abstract
Both endotherms and ectotherms may raise their body temperature to limit pathogen infection. Endotherms do this by increasing their basal metabolism; this is called 'fever'. Ectotherms do this by migrating to warmer places; this is called 'behavioral fever'. White spot syndrome virus (WSSV) is the most lethal pathogen of cultured shrimp. This study examined the existence of behavioral fever in WSSV-infected Penaeus vannamei shrimp. Shrimp weighing 15 ± 0.5 g were inoculated intramuscularly with WSSV and kept in a four-compartment system (4-CS) with all the chambers at 27 °C or with a thermal gradient (27-29-31-33 °C). During the first 4 days post-inoculation, 94% of the WSSV-inoculated shrimp died in the 4-CS with a fixed temperature (27 °C), while only 28% died in the 4-CS with a temperature gradient. The inoculated animals clearly demonstrated a movement towards the warmer compartments, whereas this was not the case with the mock- and non-inoculated animals. With primary lymphoid organ cell cultures, it was demonstrated that the increase of temperature from 27-29 °C to 31-33 °C inhibits virus replication. It is concluded that behavioral fever is used by shrimp to elevate their temperature when infected with WSSV. Behavioral fever prevents WSSV infection and mortality.
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Affiliation(s)
- Mostafa Rakhshaninejad
- Laboratory of Virology, Department of Translational Physiology, Infectiology and Public Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium.
| | - Liping Zheng
- Laboratory of Virology, Department of Translational Physiology, Infectiology and Public Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - Hans Nauwynck
- Laboratory of Virology, Department of Translational Physiology, Infectiology and Public Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
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3
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Thompson A, Kapsanaki V, Liwanag HEM, Pafilis P, Wang IJ, Brock KM. Some like it hotter: Differential thermal preferences among lizard color morphs. J Therm Biol 2023; 113:103532. [PMID: 37055135 DOI: 10.1016/j.jtherbio.2023.103532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 02/23/2023] [Accepted: 02/23/2023] [Indexed: 03/04/2023]
Abstract
Temperature rules the lives of ectotherms. To perform basic biological functions, ectotherms must make behavioral adjustments to keep their body temperatures near a preferred temperature (Tpref). Many color polymorphic lizards are active thermoregulators and exhibit morph differences in traits related to thermoregulation, such as color, body size, and microhabitat use. The Aegean wall lizard, Podarcis erhardii, is a heliothermic lizard with orange, white, and yellow color morphs that differ in size, behavior, and microhabitat use. Here, we tested whether P. erhardii color morphs from the same population from Naxos island, Greece, differ in Tpref. We hypothesized that orange morphs would prefer lower temperatures than white and yellow morphs because orange morphs are often found on cooler substrates and in microhabitats with more vegetation cover. We obtained Tpref for 95 individuals using laboratory thermal gradient experiments of wild-caught lizards and found that orange morphs do, indeed, prefer cooler temperatures. Average orange morph Tpref was 2.85 °C lower than average white and yellow morph Tpref. Our results add support to the idea that P. erhardii color morphs have multivariate alternative phenotypes and present the possibility that thermally heterogeneous environments play a role in the maintenance of color polymorphism in this species.
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Affiliation(s)
- Asher Thompson
- Department of Environmental Science, Policy, and Management, College of Natural Resources, University of California, Berkeley, CA, USA
| | - Vassiliki Kapsanaki
- Department of Biology, National and Kapodistrian University of Athens, Athens, Greece
| | - Heather E M Liwanag
- Department of Biological Sciences, California Polytechnic State University, San Luis Obispo, CA, USA
| | - Panayiotis Pafilis
- Department of Biology, National and Kapodistrian University of Athens, Athens, Greece; Zoological Museum, National and Kapodistrian University of Athens, Athens, Greece
| | - Ian J Wang
- Department of Environmental Science, Policy, and Management, College of Natural Resources, University of California, Berkeley, CA, USA; Museum of Vertebrate Zoology, University of California Berkeley, Berkeley, CA, USA
| | - Kinsey M Brock
- Department of Environmental Science, Policy, and Management, College of Natural Resources, University of California, Berkeley, CA, USA; Department of Biology, National and Kapodistrian University of Athens, Athens, Greece; Museum of Vertebrate Zoology, University of California Berkeley, Berkeley, CA, USA.
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4
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Leung BKH, Hui TY, Williams GA. Behavioural adaptation to heat stress: Shell lifting of the hermit crab Diogenes deflectomanus. J Therm Biol 2023; 113:103476. [PMID: 37055101 DOI: 10.1016/j.jtherbio.2023.103476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Revised: 12/29/2022] [Accepted: 12/29/2022] [Indexed: 01/10/2023]
Abstract
Behavioural responses to heat and desiccation stress in ectotherms are crucial for their survival in habitats where environmental temperatures are close to or even exceed their upper thermal limits. During low tide periods when pools in intertidal sediments heat up, a novel shell lifting behaviour (when hermit crabs crawl out of pools and lift up their shells) was observed in the hermit crab, Diogenes deflectomanus, on tropical sandy shores. On-shore measurements revealed that the hermit crabs left pools and lifted their shells predominantly when pool water exceeded 35.4 °C. Standing on emersed substrates above the pool water, the hermit crabs maintained their body temperatures at 26 - 29 °C, ∼ 10 °C lower than temperatures at which their physiological performances (as measured using heart rate) reached the maximum. This mismatch between preferred body temperatures and temperatures at maximal physiological performance was also observed under a laboratory controlled thermal gradient, where hermit crabs spent more time at 22 - 26 °C as compared to > 30 °C. These behaviours suggest a thermoregulatory function of the shell lifting behaviour, where the hermit crabs can avoid further increase in body temperatures when pools heat up during low tide periods. Such a behavioural decision allows the hermit crabs to be less prone to the strong temporal fluctuation in temperatures experienced during emersion periods on thermally dynamic tropical sandy shores.
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Chan SHM, Ong DRY, Williams GA, Crickenberger S, Loke LHL, Todd PA. Behaviour broadens thermal safety margins on artificial coastal defences in the tropics. MARINE ENVIRONMENTAL RESEARCH 2022; 177:105618. [PMID: 35405423 DOI: 10.1016/j.marenvres.2022.105618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 03/31/2022] [Accepted: 04/03/2022] [Indexed: 06/14/2023]
Abstract
Tropical species are predicted to be among the most vulnerable to climate change as they often live close to their upper limits to thermal tolerance and in many cases, behavioural thermoregulation is required to persist in the thermal extremes of tropical latitudes. In concert with warming temperatures, near-shore species are faced with the additional threat of shoreline hardening, leading to a reduction in microhabitats that can provide thermal refuges. This situation is exemplified in Singapore, which lies almost on the equator and so experiences year-round hot temperatures, and much of its coastline is now seawall. To investigate the thermal ecology of a common intertidal gastropod, Nerita undata, on these artificial structures, we measured thermal conditions on two seawalls, the temperatures of habitats occupied by the snail, and compared these with the snail's thermal tolerance by measuring heart rate and behavioural thermoregulation (as preferred temperature, Tpref). At one of the two seawalls (Tanjong Rimau), temperatures experienced by N. undata exceeded all measures of thermal tolerance in the sun, while at the other (Palawan Beach), they did not. Temperatures in habitats occupied by the snails on the seawalls were similar to their measured Tpref in the laboratory and were lower than all measures of thermal tolerance. Behavioural thermoregulation by the snails, therefore, significantly increased the thermal safety margins of N. undata on the relatively homogenous seawalls in Singapore, and at one of the two seawalls were necessary to allow snails to survive. Accordingly, to facilitate motile species to maintain broad thermal safety margins through behavioural regulation, the provision of additional refuges from thermal stress is recommended on artificial coastal defences such as seawalls.
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Affiliation(s)
- Shelley H M Chan
- Experimental Marine Ecology Laboratory, Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, 117557, Singapore
| | - Denise R Y Ong
- Experimental Marine Ecology Laboratory, Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, 117557, Singapore
| | - Gray A Williams
- The Swire Institute of Marine Science and School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Sam Crickenberger
- The Swire Institute of Marine Science and School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Lynette H L Loke
- Experimental Marine Ecology Laboratory, Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, 117557, Singapore
| | - Peter A Todd
- Experimental Marine Ecology Laboratory, Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, 117557, Singapore.
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6
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Hui TY, Crickenberger S, Lau JWT, Williams GA. Why are "suboptimal" temperatures preferred in a tropical intertidal ectotherm? J Anim Ecol 2022; 91:1400-1415. [PMID: 35302242 DOI: 10.1111/1365-2656.13690] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 03/07/2022] [Indexed: 11/28/2022]
Abstract
In thermally extreme environments it is challenging for organisms to maximize performance due to risks associated with stochastic variation in temperature and, subsequently, over evolutionary time minimizing the exposure to risk can serve as one of the mechanisms that result in organisms preferring suboptimal temperatures. We tested this hypothesis in a slow-moving intertidal snail on tropical rocky shores, where temperature variability increases with time from 30 min to 20 h when recorded at 30 min intervals (due to short-term environmental autocorrelation where temperatures closer in time are more similar as compared to temperatures over a long period of time). Failure to accommodate temporal variation in thermal stress by selecting cool habitats can result in mortality. Thermal performance curves for different traits (heart rate and locomotion) were measured and compared to the snail's thermal preferences in both the field and laboratory. Predicted performances of the snails were simulated based on thermal performance curves for different traits over multiple time scales and simulated carryover effects. A strong mismatch was found between physiological and behavioural thermal maxima of the snails (physiological thermal maximum being higher by ~ 7 °C), but the snails avoided these maxima and sought temperatures 7 - 14 °C cooler. Such a risk-averse strategy can be explained by their predicted performances where the snails should make decisions about preferred temperatures based on time periods ≥ 5 h to avoid underestimating the temporal variation in body temperature. In extreme and stochastic environments, where the temporal variation in environmental conditions can lead to substantial divergence between instantaneous and time-averaged thermal performances, "cooler is better" and "suboptimal" body temperatures are preferred as they provide sufficient buffer to reduce mortality risk from heat stress.
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Affiliation(s)
- T Y Hui
- The Swire Institute of Marine Science and School of Biological Sciences, The University of Hong Kong, Hong Kong, SAR, China
| | - S Crickenberger
- The Swire Institute of Marine Science and School of Biological Sciences, The University of Hong Kong, Hong Kong, SAR, China
| | - J W T Lau
- The Swire Institute of Marine Science and School of Biological Sciences, The University of Hong Kong, Hong Kong, SAR, China
| | - G A Williams
- The Swire Institute of Marine Science and School of Biological Sciences, The University of Hong Kong, Hong Kong, SAR, China
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7
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Pottier P, Burke S, Drobniak SM, Lagisz M, Nakagawa S. Sexual (in)equality? A meta‐analysis of sex differences in thermal acclimation capacity across ectotherms. Funct Ecol 2021. [DOI: 10.1111/1365-2435.13899] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Patrice Pottier
- Ecology & Evolution Research Centre School of Biological, Earth and Environmental Sciences The University of New South Wales Sydney NSW Australia
| | - Samantha Burke
- Ecology & Evolution Research Centre School of Biological, Earth and Environmental Sciences The University of New South Wales Sydney NSW Australia
| | - Szymon M. Drobniak
- Ecology & Evolution Research Centre School of Biological, Earth and Environmental Sciences The University of New South Wales Sydney NSW Australia
- Institute of Environmental Sciences Jagiellonian University Kraków Poland
| | - Malgorzata Lagisz
- Ecology & Evolution Research Centre School of Biological, Earth and Environmental Sciences The University of New South Wales Sydney NSW Australia
| | - Shinichi Nakagawa
- Ecology & Evolution Research Centre School of Biological, Earth and Environmental Sciences The University of New South Wales Sydney NSW Australia
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8
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Tladi M, Wasserman RJ, Cuthbert RN, Dalu T, Nyamukondiwa C. Thermal limits and preferences of large branchiopods (Branchiopoda: Anostraca and Spinicaudata) from temporary wetland arid zone systems. J Therm Biol 2021; 99:102997. [PMID: 34420629 DOI: 10.1016/j.jtherbio.2021.102997] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 04/06/2021] [Accepted: 05/16/2021] [Indexed: 11/15/2022]
Abstract
Large branchiopods are specialist crustaceans adapted for life in temporary, thermally dynamic wetland ecosystems. Certain large branchiopod species are, however, restricted to specific temporary wetland types, exemplified by their physico-chemical and hydroperiod characteristics. Here, we contrasted the thermal preference and critical thermal maxima (CTmax) and minima (CTmin) of southern African anostracans and spinicaudatans found exclusively in either temporary rock-pool or pan wetland types. We hypothesized that environment of origin would be a good predictor of thermal preference and critical thermal limits. To test this, Branchiopodopsis tridens (Anostraca) and Leptestheria brevirostris (Spinicaudata) were collected from rock-pool habitats, while Streptocephalus cafer (Anostraca) and a Gondwanalimnadia sp. (Spinicaudata) were collected from pan habitats. In contrast to our hypothesis, taxonomic relatedness was a better predictor of CTmax and temperature preference than environment of origin. Spinicaudatans were significantly more tolerant of high temperatures than anostracans, with L. brevirostris and Gondwanalimnadia sp. median CTmax values of 45.1 °C and 44.1 °C, respectively, followed by S. cafer (42.8 °C) and B. tridens (41.4 °C). Neither environment or taxonomic relatedness were good predictors of CTmin trends, with B. tridens (0.9 °C) and Gondwanalimnadia sp. (2.1 °C) having the lowest median CTmin values, followed by L. brevirostris (3.4 °C) and S. cafer (3.6 °C). On the contrary, temperature preferences differed according to taxa, with spinicaudatans significantly preferring higher temperatures than anostracans. Leptestheria brevirostris and Gondwanalimnadia sp. both spent most time at temperatures 30-32 °C, S. cafer at 18-20 °C and B. tridens at 21-23 °C. Constrained thermal traits reported here suggest that the studied anostracans might be more susceptible to projected climatic warming than the spinicaudatans, irrespective of habitat type, however, these taxa may also compensate through phenotypic plasticity.
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Affiliation(s)
- Murphy Tladi
- Department of Biological Sciences and Biotechnology, Botswana International University of Science and Technology, Palapye, Botswana
| | - Ryan J Wasserman
- Department of Biological Sciences and Biotechnology, Botswana International University of Science and Technology, Palapye, Botswana; Department of Zoology and Entomology, Rhodes University, Makhanda, South Africa.
| | - Ross N Cuthbert
- GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, 24105, Kiel, Germany
| | - Tatenda Dalu
- Aquatic Systems Research Group, School of Biology and Environmental Sciences, University of Mpumalanga, Nelspruit, 1200, South Africa
| | - Casper Nyamukondiwa
- Department of Biological Sciences and Biotechnology, Botswana International University of Science and Technology, Palapye, Botswana
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9
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Wang XD, Lin ZK, Ji SX, Bi SY, Liu WX, Zhang GF, Wan FH, Lü ZC. Molecular Characterization of TRPA Subfamily Genes and Function in Temperature Preference in Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae). Int J Mol Sci 2021; 22:ijms22137157. [PMID: 34281211 PMCID: PMC8268038 DOI: 10.3390/ijms22137157] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 06/20/2021] [Accepted: 06/29/2021] [Indexed: 02/03/2023] Open
Abstract
To reveal the mechanism of temperature preference in Tuta absoluta, one of the top 20 plant pests in the world, we cloned and identified TaTRPA1, TaPain, and TaPyx genes by RACE and bioinformatic analysis, and clarified their expression profiles during different development stages using real-time PCR, and revealed their function in preference temperature by RNAi. The full-length cDNA of TaPain was 3136 bp, with a 2865-bp open reading frame encoding a 259.89-kDa protein; and the partial length cDNA of TaPyx was 2326-bp, with a 2025-bp open reading frame encoding a 193.16-kDa protein. In addition, the expression of TaTRPA1 and TaPyx was significantly lower in larvae than other stages, and it was significantly higher in pupae and newly emerging males for TaPain. After feeding target double-stranded RNA (dsRNA), the preferred temperature decreased 2 °C more than the control group. In conclusion, the results firstly indicated the molecular characterization of TRPA subfamily genes and their key role in temperature perception in T. absoluta, and the study will help us to understand the temperature-sensing mechanism in the pest, and will provide some basis for study of other Lepidoptera insects’ temperature preference. Moreover, it is of great significance in enriching the research progress of “thermos TRP”.
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Affiliation(s)
- Xiao-Di Wang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (X.-D.W.); (Z.-K.L.); (S.-X.J.); (S.-Y.B.); (W.-X.L.); (G.-F.Z.); (F.-H.W.)
| | - Ze-Kai Lin
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (X.-D.W.); (Z.-K.L.); (S.-X.J.); (S.-Y.B.); (W.-X.L.); (G.-F.Z.); (F.-H.W.)
| | - Shun-Xia Ji
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (X.-D.W.); (Z.-K.L.); (S.-X.J.); (S.-Y.B.); (W.-X.L.); (G.-F.Z.); (F.-H.W.)
| | - Si-Yan Bi
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (X.-D.W.); (Z.-K.L.); (S.-X.J.); (S.-Y.B.); (W.-X.L.); (G.-F.Z.); (F.-H.W.)
| | - Wan-Xue Liu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (X.-D.W.); (Z.-K.L.); (S.-X.J.); (S.-Y.B.); (W.-X.L.); (G.-F.Z.); (F.-H.W.)
| | - Gui-Fen Zhang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (X.-D.W.); (Z.-K.L.); (S.-X.J.); (S.-Y.B.); (W.-X.L.); (G.-F.Z.); (F.-H.W.)
| | - Fang-Hao Wan
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (X.-D.W.); (Z.-K.L.); (S.-X.J.); (S.-Y.B.); (W.-X.L.); (G.-F.Z.); (F.-H.W.)
- Agricultural Genome Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518120, China
| | - Zhi-Chuang Lü
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (X.-D.W.); (Z.-K.L.); (S.-X.J.); (S.-Y.B.); (W.-X.L.); (G.-F.Z.); (F.-H.W.)
- Correspondence: ; Tel.: +86-10-8210-9572
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10
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Hui TY, Williams GA. Behavioural plasticity in the monsoonal tropics: implications for thermoregulatory traits in sandy shore crabs. Behav Ecol Sociobiol 2021. [DOI: 10.1007/s00265-021-03026-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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11
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Lubawy J, Urbański A, Colinet H, Pflüger HJ, Marciniak P. Role of the Insect Neuroendocrine System in the Response to Cold Stress. Front Physiol 2020; 11:376. [PMID: 32390871 PMCID: PMC7190868 DOI: 10.3389/fphys.2020.00376] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 03/30/2020] [Indexed: 12/25/2022] Open
Abstract
Insects are the largest group of animals. They are capable of surviving in virtually all environments from arid deserts to the freezing permafrost of polar regions. This success is due to their great capacity to tolerate a range of environmental stresses, such as low temperature. Cold/freezing stress affects many physiological processes in insects, causing changes in main metabolic pathways, cellular dehydration, loss of neuromuscular function, and imbalance in water and ion homeostasis. The neuroendocrine system and its related signaling mediators, such as neuropeptides and biogenic amines, play central roles in the regulation of the various physiological and behavioral processes of insects and hence can also potentially impact thermal tolerance. In response to cold stress, various chemical signals are released either via direct intercellular contact or systemically. These are signals which regulate osmoregulation - capability peptides (CAPA), inotocin (ITC)-like peptides, ion transport peptide (ITP), diuretic hormones and calcitonin (CAL), substances related to the general response to various stress factors - tachykinin-related peptides (TRPs) or peptides responsible for the mobilization of body reserves. All these processes are potentially important in cold tolerance mechanisms. This review summarizes the current knowledge on the involvement of the neuroendocrine system in the cold stress response and the possible contributions of various signaling molecules in this process.
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Affiliation(s)
- Jan Lubawy
- Department of Animal Physiology and Development, Faculty of Biology, Institute of Experimental Biology, Adam Mickiewicz University Poznań, Poznań, Poland
| | - Arkadiusz Urbański
- Department of Animal Physiology and Development, Faculty of Biology, Institute of Experimental Biology, Adam Mickiewicz University Poznań, Poznań, Poland
- HiProMine S.A., Robakowo, Poland
| | - Hervé Colinet
- ECOBIO – UMR 6553, Université de Rennes 1, CNRS, Rennes, France
| | | | - Paweł Marciniak
- Department of Animal Physiology and Development, Faculty of Biology, Institute of Experimental Biology, Adam Mickiewicz University Poznań, Poznań, Poland
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12
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Levinton JS, Volkenborn N, Gurr S, Correal K, Villacres S, Seabra R, Lima FP. Temperature-related heart rate in water and air and a comparison to other temperature-related measures of performance in the fiddler crab Leptuca pugilator (Bosc 1802). J Therm Biol 2020; 88:102502. [PMID: 32125988 DOI: 10.1016/j.jtherbio.2019.102502] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 12/25/2019] [Accepted: 12/29/2019] [Indexed: 11/29/2022]
Abstract
Performance in poikilotherms is known to be sensitive to temperature, often with a low-sloping increase with temperature to a peak, and a steep decline with increasing temperature past the peak. We complemented past measures of performance by measuring heartbeat rates of the fiddler crab Leptuca pugilator in water and in air as a function of a range of temperatures previously shown to affect other measures of performance. In water over a range of 20-50 °C, heartbeat increased steadily to a peak at 40 °C and then steeply declined to near zero at 50 °C. In air, heartbeat also increased, but to a peak at 35 °C and then with a gentler decline than was found in water. Part of this different response may be due to evaporative water loss, which reduced body temperature in air, and therefore thermal stress, relative to body temperature when crabs were immersed in water. Increased availability of oxygen from air, according to the oxygen and capacity-limited thermal tolerance hypothesis, likely increased aerobic scope past the thermal peak, relative to within water, where oxygen delivery at higher temperatures may have been curtailed. We compared the heart rate performance relations to two previous measures of performance - endurance on a treadmill and sprint speed, both done in air. The peak performance temperature increased in the order: treadmill endurance time, sprint speed, heart rate in air, and heart rate in water, which demonstrates that different performance measures give different perspectives on the relation of thermal tolerance and fitness to temperature. Endurance may therefore be the limiting upper thermal stress factor in male fiddler crabs, when on hot sand flats. Temperature preference, found to be for temperatures <30 °C in air, could be a bet-hedging evolutionary strategy to avoid aerobic scope affecting endurance.
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Affiliation(s)
| | - Nils Volkenborn
- School of Marine and Atmospheric Sciences, Stony Brook University, USA
| | - Samuel Gurr
- School of Marine and Atmospheric Sciences, Stony Brook University, USA; Department of Ecology and Evolution, Stony Brook University, USA
| | - Kelly Correal
- Department of Ecology and Evolution, Stony Brook University, USA
| | | | - Rui Seabra
- Universidade do Porto, Campus Agrário de Vairão, Portugal
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