Daily rhythms of body temperature and heat production of sibling mastomys species from different ecosystems — The response to photoperiod manipulations

Haim, Abraham; Zubidat, Abed E.; Aarde, Rudi J. van

doi:10.1016/j.cbpa.2008.07.003

Cited by 11 publications

(10 citation statements)

References 32 publications

(37 reference statements)

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“…In fact, the magnitude of the difference in intrinsic MR between species adapted to different environments ranges between 9 and 20%. For example, the difference was 8-16% in mice (Haim et al, 2008) and 9-20% in polychaetes (Gamenick et al, 1998;Linke-Gamenick et al, 2000). Even for species with intrinsically different MRs, additional factors are probably necessary to account for their ability to exist in extremely divergent environments.…”

Section: Discussionmentioning

confidence: 94%

“…Tieleman et al measured MR across several related genera of birds and found a strong relationship between native aridity and metabolic rate (Tieleman et al, 2003). In contrast, when Haim et al measured MR across a range of photoperiods and times of the day of two sibling species of mice, one of which was arid adapted, there was not a significant difference in MR for most intervals tested (Haim et al, 2008). The authors concluded that a difference in MR was not responsible for the adaptation.…”

Section: Introductionmentioning

confidence: 85%

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Variation in metabolic rate ofAnopheles gambiaeandA. arabiensisin a Sahelian village

Huestis

Yaro

Traoré

et al. 2011

Journal of Experimental Biology

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In the Sahel, the Anopheles gambiae complex consists of Anopheles arabiensis and the M and S molecular forms of A. gambiae sensu stricto. However, the composition of these malaria vectors varies spatially and temporally throughout the region and is thought to be linked to environmental factors such as rainfall, larval site characteristics and duration of the dry season. To examine possible physiological divergence between these taxa, we measured metabolic rates of mosquitoes during the wet season in a Sahelian village in Mali. To our knowledge, this study provides the first measurements of metabolic rates of A. gambiae and A. arabiensis in the field. The mean metabolic rate of A. arabiensis was higher than that of M-form A. gambiae when accounting for the effects of female gonotrophic status, temperature and flight activity. However, after accounting for their difference in body size, no significant difference in metabolic rate was found between these two species (whilst all other factors were found to be significant). Thus, body size may be a key character that has diverged in response to ecological differences between these two species. Alternatively, these species may display additional differences in metabolic rate only during the dry season. Overall, our results indicate that changes in behavior and feeding activity provide an effective mechanism for mosquitoes to reduce their metabolic rate, and provide insight into the possible strategies employed by aestivating individuals during the dry season. We hypothesize that female mosquitoes switch to sugar feeding while in dormancy because of elevated metabolism associated with blood digestion.

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Section: Discussionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 85%

Variation in metabolic rate ofAnopheles gambiaeandA. arabiensisin a Sahelian village

Huestis

Yaro

Traoré

et al. 2011

Journal of Experimental Biology

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“…Light:dark cycles are a common Zeitgeber for the entrainment of the mammalian biological clock and the main cue for their seasonal acclimatization (Aschoff et al, 1982;Haim et al, 2008). Disruption of scotophase by light results in physiological and hormonal changes that activate stress (Bass and Takahashi, 2010;Zubidat et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Light Interference (LI) as a possible stressor altering HSP70 and its gene expression levels in brain and liver tissues of Golden Spiny Mice

Ashkenazi

Haim

2012

Journal of Experimental Biology

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SUMMARYLight at night and light interference (LI) disrupt the natural light:dark cycle, causing alterations at physiological and molecular levels, partly by suppressing melatonin (MLT) secretion at night. Heat shock proteins (HSPs) can be activated in response to environmental changes. We assessed changes in gene expression and protein level of HSP70 in brain and hepatic tissues of golden spiny mice (Acomys russatus) acclimated to LI for two (SLI), seven (MLI) and 21 nights (LLI). The effect of MLT treatment on LI-mice was also assessed. HSP70 levels increased in brain and hepatic tissues after SLI, whereas after MLI and LLI, HSP70 decreased to control levels. Changes in HSP70 levels as a response to MLT occurred after SLI only in hepatic tissue. However, hsp70 expression following SLI increased in brain tissue, but not in hepatic tissue. MLT treatment and SLI caused a decrease in hsp70 levels in brain tissue and an increase in hsp70 in hepatic tissue. SLI acclimation elicited a stress response in A. russatus, as expressed by increased HSP70 levels and gene expression. Longer acclimation decreases protein and gene expression to their control levels. We conclude that for brain and hepatic tissues of A. russatus, LI is a short-term stressor. Our results also revealed that A. russatus can acclimate to LI, possibly because of its circadian system plasticity, which allows it to behave both as a nocturnal and as a diurnal rodent. To the best of our knowledge, this is the first study showing the effect of LI as a stressor at the cellular level, by activating HSP70. Supplementary material available online at

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“…Thermal conductance was computed at thermoneutrality, as C = RMR/(T b − T a ), where T b is body temperature after RMR estimation (Seymour et al 1998). Additionally, other parameters were obtained, as metabolic water production (MWP = RMR * 0.62 mg H 2 O/ml O 2 -Schmidt-Nielsen and Schmidt-Nielsen 1950b; MacMillen and Hinds 1983), evaporative heat loss (EHL = TEWL * 0.603 cal/mg H 2 O; see Stitt 1976;Huynh et al 2007), and heat production (HP = RMR * 5.011 cal/ml O 2 ; see Haim et al 2008).…”

Section: Methodsmentioning

confidence: 99%

Does acclimation to contrasting atmospheric humidities affect evaporative water loss in the South American subterranean rodentCtenomys talarum?

Baldo

Luna

Antenucci

2016

JMAMMAL

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Water conservation is challenging for terrestrial life since water is continuously lost through respiration, excretion, and cutaneous evaporation. Total evaporative water loss (TEWL) is an important component of the water budget. In general, TEWL is mainly determined by biophysical mechanisms, such as ambient temperature (T a) and humidity. However, it has also been suggested that TEWL can be actively regulated in the short term to confront environmental conditions and be further modified by development and acclimation. Thus, regulation of TEWL might be complex, especially in semifossorial species, which continuously meet contrasting conditions at the surface. We evaluated the influence of acclimation to different ambient humidities on TEWL and associated metabolic parameters in the subterranean rodent Ctenomys talarum. We found that changing humidity acclimation conditions may not elicit modifications on TEWL. Both the water vapor-saturated burrows and the stability in TEWL at different humidities would lead to overheating problems at high ambient temperatures. Then, other forms of heat loss such as dry conductance may be enhanced. Fossoriality apparently evolved as a way of surviving increasing aridity conditions; therefore, other behavioral adjustments might be employed to counteract the high humidity within burrows.

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Daily rhythms of body temperature and heat production of sibling mastomys species from different ecosystems — The response to photoperiod manipulations

Cited by 11 publications

References 32 publications

Variation in metabolic rate ofAnopheles gambiaeandA. arabiensisin a Sahelian village

Variation in metabolic rate ofAnopheles gambiaeandA. arabiensisin a Sahelian village

Light Interference (LI) as a possible stressor altering HSP70 and its gene expression levels in brain and liver tissues of Golden Spiny Mice

Does acclimation to contrasting atmospheric humidities affect evaporative water loss in the South American subterranean rodentCtenomys talarum?

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