Thermal relationships and exercise physiology in anuran amphibians: Integration and evolutionary implications

Navas, Carlos A.; Gomes, Fernando Ribeiro; Carvalho, José Eduardo de

doi:10.1016/j.cbpa.2007.07.003

Cited by 141 publications

(136 citation statements)

References 192 publications

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“…Esto podría deberse a que en las hembras los cuerpos grasos exhiben tamaño mínimo durante el período de desove (Díaz-Páez & Ortiz 2001). Teniendo en cuenta que H. pulchellus se reproduce en invierno (Basso 1990, López et al 2011, el mayor desarrollo de los cuerpos grasos en los machos se relacionaría con las actividades energéticamente demandantes que se encuentran realizando éstos durante la temporada de apareamiento (establecer los sitios de canto, defender estos sitios de machos competidores, emitir el canto reproductivo para atraer a las hembras potenciales para el apareamiento) (Wells 2007, Navas et al 2008, Quiroga & Sanabria 2012. En una población del sur de Brasil, Solé & Pelz (2007) encontraron que la mayor parte de los machos de H. pulchellus tenían presas en el estómago mientras se encontraban en el lugar de reproducción y sugirieron que existe una gran congruencia de los hábitats de alimentación y apareamiento.…”

Section: Discussionunclassified

Alimentación de dos especies de anfibios (Anura: Hylidae) en la estación de bajas temperaturas y su relación con la acumulación de energía en Santa Fe, Argentina

Antoniazzi

López

Duré

et al. 2013

RBT

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Section: Discussionunclassified

Alimentación de dos especies de anfibios (Anura: Hylidae) en la estación de bajas temperaturas y su relación con la acumulación de energía en Santa Fe, Argentina

Antoniazzi

López

Duré

et al. 2013

RBT

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“…In ectotherms, optimal performance ability is restricted to a relatively narrow temperature range; any time spent above the critical thermal threshold can compromise locomotor performance and impair an individual's ability to escape from predators or sudden temperature changes (Reading 2007). While amphibians display fairly wide thermal performance functions (Navas et al 2008), performance becomes impaired rapidly with increases in temperature (Huey and Stevenson 1979). Thus, the higher body surface temperatures of malformed individuals could predispose them to overheating, desiccation, or operating outside of their preferred thermal range.…”

Section: Discussionmentioning

confidence: 99%

Ecomorphology and disease: cryptic effects of parasitism on host habitat use, thermoregulation, and predator avoidance

Goodman

Johnson

2011

Ecology

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Abstract. Parasites can cause dramatic changes in the phenotypes of their hosts, sometimes leading to a higher probability of predation and parasite transmission. Because an organism's morphology directly affects its locomotion, even subtle changes in key morphological traits may affect survival and behavior. However, despite the ubiquity of parasites in natural communities, few studies have incorporated parasites into ecomorphological research. Here, we evaluated the effects of parasite-induced changes in host phenotype on the habitat use, thermal biology, and simulated predator-escape ability of Pacific chorus frogs (Pseudacris regilla) in natural environments. Frogs with parasite-induced limb malformations were more likely to use ground microhabitats relative to vertical refugia and selected less-angled perches closer to the ground in comparison with normal frogs. Although both groups had similar levels of infection, malformed frogs used warmer microhabitats, which resulted in higher body temperatures. Likely as a result of their morphological abnormalities, malformed frogs allowed a simulated predator to approach closer before escaping and escaped shorter distances relative to normal frogs. These data indicate that parasite-induced morphological changes can significantly alter host behavior and habitat use, highlighting the importance of incorporating the ubiquitous, albeit cryptic, role of parasites into ecomorphological research.

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“…Among the species inhabiting xeric environments, amphibians are particularly dependent on underground shelters because of their permeable skin (Navas et al, 2008). Although most amphibians can use burrows opportunistically, some species are obligate burrowers (semi-fossorial), spending most of their life underground, and only emerging to forage and reproduce (Wells, 2010).…”

Section: Introductionmentioning

confidence: 99%

Dryness affects burrowing depth in a semi-fossorial amphibian

Székely

Cogălniceanu

Székely

et al. 2018

Journal of Arid Environments

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The fossorial life-history emerged as a response to hostile environmental conditions, such as extreme temperatures and dryness. It evolved independently in different lineages of amphibians, which are particularly vulnerable to dehydration and require a continuous level of humidity because of their permeable skin. For the first time, we test the hypothesis that amphibians are able to adapt their fossorial behaviour to substrate humidity, using the Pacific horned frogs (Ceratophrys stolzmanni) from the Ecuadorian dry forest as a model. When exposed to dry substrate, the animals burrowed much deeper than the ones in wet soil. The capacity to excavate was particularly high in this species: frogs from the dry treatment could be found at more than onemeter depth after just a few hours. Our results reveal a conditional strategy that contributes to explain the persistence of amphibians in dry environments.

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Thermal relationships and exercise physiology in anuran amphibians: Integration and evolutionary implications

Cited by 141 publications

References 192 publications

Alimentación de dos especies de anfibios (Anura: Hylidae) en la estación de bajas temperaturas y su relación con la acumulación de energía en Santa Fe, Argentina

Alimentación de dos especies de anfibios (Anura: Hylidae) en la estación de bajas temperaturas y su relación con la acumulación de energía en Santa Fe, Argentina

Ecomorphology and disease: cryptic effects of parasitism on host habitat use, thermoregulation, and predator avoidance

Dryness affects burrowing depth in a semi-fossorial amphibian

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