Seasonal variation of behavioural thermoregulation in the Spotted Salamander (Ambystoma maculatum) DOI Creative Commons
Danilo Giacometti, Glenn J. Tattersall

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: March 17, 2024

Abstract Mounting evidence suggests that temperature seasonality plays a pivotal role in shaping the thermal biology of ectotherms. However, we still have limited understanding how amphibians maintain balance face varying temperatures, especially fossorial species. Due to buffering underground, theory predicts relaxed selection pressure over thermoregulation As result, ectotherms typically show low thermoregulatory precision and thermotactic behaviours when tested laboratory gradients. In this study, evaluated ( T sel ) behavioural differed between seasons Spotted Salamander Ambystoma maculatum ). By comparing parameters activity overwintering seasons, provide A . engages active despite its habit. both found be consistently offset higher than prevailing conditions. Thermoregulation with salamanders having showing greater thermophilic season compared season. Our study highlights combination measurements is necessary step better understand mechanisms underlie body control amphibians. Ultimately, our provides broader amphibians, particularly context responses Summary statement demonstrate being fossorial.

Language: Английский

How seasonality influences the thermal biology of lizards with different thermoregulatory strategies: a meta‐analysis DOI Open Access
Danilo Giacometti, Alexandre V. Palaoro, Laura C. Leal

et al.

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Journal Year: 2023, Volume and Issue: 99(2), P. 409 - 429

Published: Oct. 23, 2023

ABSTRACT Ectotherms that maintain thermal balance in the face of varying climates should be able to colonise a wide range habitats. In lizards, thermoregulation usually appears as variety behaviours buffer external influences over physiology. Basking species rely on solar radiation raise body temperatures and show high thermoregulatory precision. By contrast, do not bask are often constrained by climatic conditions their habitats, thus having lower While much focus has been given effects mean habitat temperatures, relatively less is known about how seasonality affects biology lizards macroecological scale. Considering current climate crisis, assessing cope with temporal variations environmental temperature essential understand better these organisms will fare under change. Activity ( T b ) represent internal an animal measured nature during its active period (i.e. realised niche), preferred pref those selected laboratory gradient lacks costs fundamental niche). Both traits form bulk ecology research studied context seasonality. this study, we used meta‐analysis test seasonal variation differ strategy (basking versus non‐basking). Based 333 effect sizes from 137 species, found varied greater magnitude than across seasons. Variations were influenced seasonality; however, size mediated responses. Specifically, larger subjected , basking endured compared non‐basking species. On other hand, increased regardless size. Thermoregulatory also suggesting behaviour important role mediating responses landscape. After controlling for phylogenetic effects, showed significantly lizard families. Taken together, our results support notion relationship between parameters can taxon trait dependent. Our showcase importance considering ecological behavioural aspects studies. We further highlight systematic, geographical, knowledge gaps research. work benefit who aim more fully shapes ultimately contributing goal elucidating evolution temperature‐sensitive ectotherms.

Language: Английский

Citations

14
Seasonal plasticity in the thermal sensitivity of metabolism but not water loss in a fossorial ectotherm DOI Creative Commons
Danilo Giacometti, Glenn J. Tattersall

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 10, 2025

Abstract Ectotherms from highly seasonal habitats should have enhanced potential for physiological plasticity to cope with climatic variability. However, whether this pattern is applicable fossorial ectotherms, who are potentially buffered thermal variability, still unclear. Here, we evaluated how acclimatisation (spring vs. autumn) affected the sensitivity of standard metabolic rates (SMR), evaporative water loss (EWL), and skin resistance (Rs) in spotted salamander (Ambystoma maculatum). We hypothesised that temperature would both short- long-term effects over traits (i.e., acute exposure test temperatures acclimatisation, respectively). After accounting body mass sex, found short-term changes led an increase SMR, EWL, Rs. Additionally, SMR Rs differed between seasons, but EWL did not. Sustaining low high spring may allow salamanders allocate energy toward overwintering emergence breeding while simultaneously maximising conservation. By contrast, maintaining autumn forage aboveground on rainy nights replenish reserves preparation winter. Despite common assumption ectotherms effects, our study shows functional differences seasons provisioning accompanied by energetic hydroregulatory requirements.

Language: Английский

Citations

0
Seasonal plasticity in the thermal sensitivity of metabolism but not water loss in a fossorial ectotherm DOI
Danilo Giacometti, Glenn J. Tattersall

Oecologia, Journal Year: 2025, Volume and Issue: 207(5)

Published: April 23, 2025

Language: Английский

Citations

0
Seasonal variation of behavioural thermoregulation in a fossorial salamander ( Ambystoma maculatum ) DOI Creative Commons
Danilo Giacometti, Glenn J. Tattersall

Royal Society Open Science, Journal Year: 2024, Volume and Issue: 11(9)

Published: Sept. 1, 2024

Temperature seasonality plays a pivotal role in shaping the thermal biology of ectotherms. However, we still have limited understanding how ectotherms maintain balance face varying temperatures, especially fossorial species. Due to buffering underground, ecology theory predicts relaxed selection pressure over thermoregulation As result, typically show low thermoregulatory precision and evidence thermotactic behaviours laboratory gradients. Here, evaluated temperature ( T sel ) associated differed between seasons amphibian, spotted salamander Ambystoma maculatum ). By comparing parameters active overwintering seasons, that A. engages behavioural despite being fossorial. In both was consistently offset higher than acclimatization temperatures. Thermoregulation with salamanders having showing greater thermophilic compared season. Additionally, our work lends support experimental assumptions commonly made but seldom tested studies. Ultimately, study demonstrates combination careful measurements is necessary step better understand mechanisms underlie body control amphibians.

Language: Английский

Citations

3
Seasonal variation of behavioural thermoregulation in the Spotted Salamander (Ambystoma maculatum) DOI Creative Commons
Danilo Giacometti, Glenn J. Tattersall

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: March 17, 2024

Abstract Mounting evidence suggests that temperature seasonality plays a pivotal role in shaping the thermal biology of ectotherms. However, we still have limited understanding how amphibians maintain balance face varying temperatures, especially fossorial species. Due to buffering underground, theory predicts relaxed selection pressure over thermoregulation As result, ectotherms typically show low thermoregulatory precision and thermotactic behaviours when tested laboratory gradients. In this study, evaluated ( T sel ) behavioural differed between seasons Spotted Salamander Ambystoma maculatum ). By comparing parameters activity overwintering seasons, provide A . engages active despite its habit. both found be consistently offset higher than prevailing conditions. Thermoregulation with salamanders having showing greater thermophilic season compared season. Our study highlights combination measurements is necessary step better understand mechanisms underlie body control amphibians. Ultimately, our provides broader amphibians, particularly context responses Summary statement demonstrate being fossorial.

Language: Английский

Citations

1