Ambient temperature limits above-ground activity of the subterranean rodent Spalacopus cyanus

Rezende, Enrico L.; Cortés, Arturo; Bacigalupe, Leonardo D.; Nespolo, Roberto F.; Bozinovic, Francisco

doi:10.1016/s0140-1963(02)00259-8

Cited by 51 publications

(49 citation statements)

References 31 publications

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“…Rodents are not able to maintain high body temperatures because this would result in heat prostration and eventual death. Instead, wild rodents deal with ambient increases in temperature by seeking shade or underground shelter (37). Additionally, high summer temperatures and a dry environment can reduce the survival rate of hantaviruses (38,39).…”

Section: Discussionmentioning

confidence: 99%

Interannual cycles of Hantaan virus outbreaks at the human–animal interface in Central China are controlled by temperature and rainfall

Tian

Yu²,

Cazelles

et al. 2017

Proc. Natl. Acad. Sci. U.S.A.

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Hantavirus, a rodent-borne zoonotic pathogen, has a global distribution with 200,000 human infections diagnosed annually. In recent decades, repeated outbreaks of hantavirus infections have been reported in Eurasia and America. These outbreaks have led to public concern and an interest in understanding the underlying biological mechanisms. Here, we propose a climate-animalHantaan virus (HTNV) infection model to address this issue, using a unique dataset spanning a 54-y period . This dataset comes from Central China, a focal point for natural HTNV infection, and includes both field surveillance and an epidemiological record. We reveal that the 8-y cycle of HTNV outbreaks is driven by the confluence of the cyclic dynamics of striped field mouse (Apodemus agrarius) populations and climate variability, at both seasonal and interannual cycles. Two climatic variables play key roles in the ecology of the HTNV system: temperature and rainfall. These variables account for the dynamics in the host reservoir system and markedly affect both the rate of transmission and the potential risk of outbreaks. Our results suggest that outbreaks of HTNV infection occur only when climatic conditions are favorable for both rodent population growth and virus transmission. These findings improve our understanding of how climate drives the periodic reemergence of zoonotic disease outbreaks over long timescales.Hantaan virus | spillover to humans | wildlife reservoir | time-series data | climate change

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Section: Discussionmentioning

confidence: 99%

Interannual cycles of Hantaan virus outbreaks at the human–animal interface in Central China are controlled by temperature and rainfall

Tian

Yu²,

Cazelles

et al. 2017

Proc. Natl. Acad. Sci. U.S.A.

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“…Moreover, the small size of the temperature logger (3 g) and quadrupled memory capacity (Thermochron iButton model DS1922L offers 8kB of memory) increase the versatility of TBAE for use in a variety of active foraging species that rely on thermally insulated refugia-like red foxes (Vulpes vulpes), badgers (Meles meles), and cactus wrens (Campylorhynchus brunneicapillus) (Fenn and MacDonald, 1995;Moore and Roper, 2003;Ricklefs and Hainsworth, 1968). Arid environments offer ideal conditions in which to use TBAE since (1) the refugia of resident animals as diverse as arachnids (Polis, 1980;Shillington, 2002), birds (Ricklefs and Hainsworth, 1968), mammals (Jackson et al, 2002;Moore and Roper, 2003;Randall, 1993;Rezende et al, 2003), and reptiles; (Beck and Jennings, 2003;Bradshaw, 1997;Bulova, 2002;Grant and Dunham, 1988) are notably buffered from extreme fluctuations in T air , and thus present the thermal dichotomy required for TBAE and (2) many animals use water-conserving behaviors, including extended inactivity periods and temporally constrained activity (i.e., nocturnality), which improve the accuracy of TBAE (this study). TBAE can also identify the date and time of key annual events such as initiation and cessation of seasonal dormancy (J.…”

Section: Resultsmentioning

confidence: 99%

“…Refuge use is common in all taxa and obligatory in many species since refugia often provide living, nesting, and socializing locations, protection from predation (Blumstein et al, 2001;Davis and Theimer, 2004;Martin and Lopez, 2000;Polis, 1980), and, perhaps most notably, a significant buffer from challenging environmental conditions including drought (Beck and Jennings, 2003;Bulova, 2002) and both high (Grant and Dunham, 1988;Rezende et al, 2003;Ricklefs and Hainsworth, 1968) and low (Buck and Barnes, 1999;Dorcas and Peterson, 1998;Peterson, 1987) air temperature extremes. These benefits become increasingly valuable in arid environments because aridity is often accompanied by challenging air temperatures making behaviors that benefit both water conservation and thermoregulation (e.g., shifting activity from diurnal to nocturnal, decreasing overall surface activity, hibernation/active-season dormancy) essential for survival.…”

Section: Introductionmentioning

confidence: 99%

“…The general dichotomy that exists in temperate-zone climates between highly fluctuating T air and milder, more stable temperatures in thermally insulated refugia-like sub-terranean burrows (Bulova, 2002;Rezende et al, 2003;Shenbrot et al, 2002) and water (Grayson and Dorcas, 2004) led us to test the hypothesis that environmental thermal heterogeneity can be used to predict animal surface activity. We predicted that the thermal dichotomy between air and sub-surface temperatures influences the T b of free-ranging reptiles in a predictable manner such that T b can be used to distinguish surface activity from refuge occupation.…”

Section: Introductionmentioning

confidence: 99%

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An automated temperature-based option for estimating surface activity and refuge use patterns in free-ranging animals

Davis

Taylor

DeNardo

2008

Journal of Arid Environments

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Accurately assessing free ranging animals' patterns of surface activity and refuge use is critical, yet fundamentally challenging for biologists and wildlife managers. We evaluate the accuracy of an automated technique temperature based activity estimation (TBAE) in estimating surface activity and refuge use patterns of two sympatric reptiles, the western diamond backed rattlesnake (Crotalus atrox) and the Gila monster (Heloderma suspectum) in the Sonoran Desert. TBAE derived from a comparison of body temperature to shaded air temperature was effective in estimating the overall percent surface activity for both rattlesnakes (observed surface activity 51.8%, TBAE estimated surface activity 48.2%) and Gila monsters (observed 22.3%, TBAE 24.5%). There was, however, considerable interspecific difference in the effectiveness of TBAE in predicting surface activity at specific time points; TBAE was far more accurate for Gila monsters than for rattlesnakes (96% vs. 66% time point specific accuracy, respectively). We assert that, when validated, TBAE can be used to yield concurrent and accurate body temperatures and activity estimates for multiple free ranging animals, particularly in arid environments, which improves our understanding of animal biology and can be used to inform management decisions.

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“…(1) a thermoregulatory strategy to avoid cold/heat stress (Chiarello 1998;Rezende et al 2003), (2) anti-predator strategies (Zielinsky 1988;Lode 1995;Gunn et al 2014), (3) metabolic dietary-related needs (Engqvist and Richard 1991;van Schaik and Griffiths 1996;Halle 2000;Merritt and Vessey 2000), (4) the avoidance of inter-specific competition (Ganzhorn 1989;Kronfeld-Schor and Dayan 1999;Jacob and Brown 2000;Jones et al 2001), and (5) demographic differences, e.g., group size, age, and/or sex (Beier and McCullough 1990;Wauters et al 2000;Marcelli et al 2003;Kaczensky et al 2006;Zschille et al 2010). Evidence from primates supports a few of these hypotheses (reviewed in Curtis and Rasmussen 2006;Donati and Borgognini-Tarli 2006b;Donati et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Predator avoidance and dietary fibre predict diurnality in the cathemeral folivore Hapalemur meridionalis

Eppley

Watzek

Ganzhorn

et al. 2016

Behav Ecol Sociobiol

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Though numerous mammalian taxa exhibit cathemerality (i.e., activity distributed across 24-h cycle), this includes very few primates, exceptions being species from Aotinae and Lemuridae. Four non-mutually exclusive hypotheses have been proposed to explain ultimate determinants for cathemeral activity in lemurs: thermoregulatory benefits, anti-predator strategy, competition avoidance, and metabolic dietary-related needs. However, these have only been explored in the frugivorous genus Eulemur, with some species increasing nocturnality as a possible response to avoid diurnal raptors and to increase their ability to digest fibre during resource scarce periods. Since Eulemur lack specialisations for digesting bulk food, this strategy would allow for processing fibres over the full 24-h. The folivorous lemurids, i.e., genus Hapalemur, provide a divergent model to explore these hypotheses due to gastrointestinal adaptations for digesting dietary fibre and small body size compared to Eulemur. We linked continuous activity data collected from archival tags with observational behaviour and feeding data from three groups of adult H. meridionalis from JanuaryDecember 2013. We tested the effects of thermoregulation, anti-predator, and the weighted proportion of dietary fibre on the daily diurnal/nocturnal activity ratio using a Linear MixedModel. Our best-fit model revealed that increased canopy exposure and dietary fibre predicted greater diurnality. Our findings contrast with previous predictions for frugivorous lemurids, proposing a divergent adaptive explanation for folivorous lemurids. We suggest that the need to avoid terrestrial predators, as well as the longer digestive bouts during periods of bulky food, may override cathemerality in favour of diurnality in these bamboo lemurs.

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Ambient temperature limits above-ground activity of the subterranean rodent Spalacopus cyanus

Cited by 51 publications

References 31 publications

Interannual cycles of Hantaan virus outbreaks at the human–animal interface in Central China are controlled by temperature and rainfall

Interannual cycles of Hantaan virus outbreaks at the human–animal interface in Central China are controlled by temperature and rainfall

An automated temperature-based option for estimating surface activity and refuge use patterns in free-ranging animals

Predator avoidance and dietary fibre predict diurnality in the cathemeral folivore Hapalemur meridionalis

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