Evaluation of the combined temperature and relative humidity preferences of the Colombian terrestrial salamander<i>Bolitoglossa ramosi</i>(Amphibia: Plethodontidae)

Galindo, Carlos; Cruz, Erika; Bernal, Manuel Hernando

doi:10.1139/cjz-2017-0330

Cited by 13 publications

(13 citation statements)

References 48 publications

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“…Southern rock agamas (Agama atra), for example, are highly effective thermoregulators when the environment is warm, but are less effective when the environment cools: correspondingly, physiological divergence is much more limited for traits on the upper end of the thermal performance curve in these lizards (Logan et al 2019). Although the Bogert effect has been more often studied with respect to behavioral thermoregulation, several studies have found that other homeostatic behaviors, like hydroregulation, are likewise associated with strong behavioral buffering across environmental gradients (e.g., Farallo et al 2018;Galindo et al 2018;Rozen-Rechels et al 2019).…”

Section: Modern Conceptions Of the Bogert Effectmentioning

confidence: 99%

The Bogert effect, a factor in evolution

Muñoz

2021

Evolution

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Behavior is one of the major architects of evolution: by behaviorally modifying how they interact with their environments, organisms can influence natural selection, amplifying it in some cases and dampening it in others. In one of the earliest issues of Evolution, Charles Bogert proposed that regulatory behaviors (namely thermoregulation) shield organisms from selection and limit physiological evolution. Here, I trace the history surrounding the origin of this concept (now known as the "Bogert effect" or "behavioral inertia"), and its implications for physiological and evolutionary research throughout the 20th century. A key follow-up study in the early 21st century galvanized renewed interest in Bogert's classic ideas, and established a focus on slowdowns in the rate of evolution in response to regulatory behaviors. I illustrate recent progress on the Bogert effect in evolutionary research, and discuss the ecological variables that predict whether and how strongly the phenomenon unfolds. Based on these discoveries, I provide hypotheses for the Bogert effect across several scales: patterns of trait evolution within and among groups of species, spatial effects on the phenomenon, and its importance for speciation. I also discuss the inherent link between behavioral inertia and behavioral drive through an empirical case study linking the phenomena. Modern comparative approaches can help put the macroevolutionary implications of behavioral buffering to the test: I describe progress to date, and areas ripe for future investigation. Despite many advances, bridging microevolutionary processes with macroevolutionary patterns remains a persistent gap in our understanding of the Bogert effect, leaving wide open many avenues for deeper exploration.

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Section: Modern Conceptions Of the Bogert Effectmentioning

confidence: 99%

The Bogert effect, a factor in evolution

Muñoz

2021

Evolution

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“…Because so little is known about amphibian hydrothermal regulation as a neuroethological system, we may call "thermoregulation" behaviors different conducts, such as avoidance of extreme temperature and close behavioral regulation of body temperature. There may be hydric zones favoring thermoregulation (e.g., [93]), wide thermal ranges in which thermoregulation is minimal [94], and other complexities. A same type of modeling based on thermoregulation would hardly be general for amphibians.…”

Section: Behavioral Site Selection and Hydrothermal Regulationmentioning

confidence: 99%

Ecophysiology of Amphibians: Information for Best Mechanistic Models

et al. 2018

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Several amphibian lineages epitomize the faunal biodiversity crises, with numerous reports of population declines and extinctions worldwide. Predicting how such lineages will cope with environmental changes is an urgent challenge for biologists. A promising framework for this involves mechanistic modeling, which integrates organismal ecophysiological features and ecological models as a means to establish causal and consequential relationships of species with their physical environment. Solid frameworks built for other tetrapods (e.g., lizards) have proved successful in this context, but its extension to amphibians requires care. First, the natural history of amphibians is distinct within tetrapods, for it includes a biphasic life cycle that undergoes major habitat transitions and changes in sensitivity to environmental factors. Second, the accumulated data on amphibian ecophysiology is not nearly as expressive, is heavily biased towards adult lifeforms of few non-tropical lineages, and overlook the importance of hydrothermal relationships. Thus, we argue that critical usage and improvement in the available data is essential for enhancing the power of mechanistic modeling from the physiological ecology of amphibians. We highlight the complexity of ecophysiological variables and the need for understanding the natural history of the group under study and indicate directions deemed crucial to attaining steady progress in this field.

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“…In general, wet-skinned ectotherms invest less in thermoregulation behaviors such as basking and are less active thermoregulators than dryskinned ectotherms [10,20]. Their body temperatures and PBTs are also much more labile and vary importantly with habitat humidity and hydration state [e.g., [21][22][23]. Dry skinned species can more easily bask to the sun thanks to their skin protection against radiation and higher resistance to evaporative water loss, but the behavioral strategies of these species can also be constrained by water loss risks [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Short-term changes in air humidity and water availability weakly constrain thermoregulation in a dry-skinned ectotherm

et al. 2021

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Thermoregulation is critical for ectotherms as it allows them to maintain their body temperature close to an optimum for ecological performance. Thermoregulation includes a range of behaviors that aim at regulating body temperature within a range centered around the thermal preference. Thermal preference is typically measured in a thermal gradient in fully-hydrated and post-absorptive animals. Short-term effects of the hydric environment on thermal preferences in such set-ups have been rarely quantified in dry-skinned ectotherms, despite accumulating evidence that dehydration might trade-off with behavioral thermoregulation. Using experiments performed under controlled conditions in climatic chambers, we demonstrate that thermal preferences of a ground-dwelling, actively foraging lizard (Zootoca vivipara) are weakly decreased by a daily restriction in free-standing water availability (less than 0.5°C contrast). The influence of air humidity during the day on thermal preferences depends on time of the day and sex of the lizard, and is generally weaker than those of of free-standing water (less than 1°C contrast). This shows that short-term dehydration can influence, albeit weakly, thermal preferences under some circumstances in this species. Environmental humidity conditions are important methodological factors to consider in the analysis of thermal preferences.

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Evaluation of the combined temperature and relative humidity preferences of the Colombian terrestrial salamanderBolitoglossa ramosi(Amphibia: Plethodontidae)

Cited by 13 publications

References 48 publications

The Bogert effect, a factor in evolution

The Bogert effect, a factor in evolution

Ecophysiology of Amphibians: Information for Best Mechanistic Models

Short-term changes in air humidity and water availability weakly constrain thermoregulation in a dry-skinned ectotherm

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