Field, selected body temperature and thermal tolerance of the syntopic lizards Phymaturus patagonicus and Liolaemus elongatus (Iguania: Liolaemidae)

Ibargüengoytía, Nora R.

doi:10.1016/j.jaridenv.2005.01.008

Cited by 58 publications

(47 citation statements)

References 30 publications

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“…For this population, mean activity temperature was not influenced by lizard size or body mass, similar to other species of lizards (e.g. SMITH & BALLINGER 1994, VRCIBRADIC & ROCHA 1998, KIEFER et al 2005, IBARGÜENGOYTÍA 2005.…”

Section: Resultssupporting

confidence: 74%

Living in a caatinga-rocky field transitional habitat: ecological aspects of the whiptail lizard Cnemidophorus ocellifer (Teiidae) in northeastern Brazil

Menezes¹,

Sluys²,

Fontes³

et al. 2011

Zoologia (Curitiba, Impr.)

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Section: Resultssupporting

confidence: 74%

Living in a caatinga-rocky field transitional habitat: ecological aspects of the whiptail lizard Cnemidophorus ocellifer (Teiidae) in northeastern Brazil

Menezes¹,

Sluys²,

Fontes³

et al. 2011

Zoologia (Curitiba, Impr.)

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“…Fraser (1985) reported no sexual differences in the heating rates of Ergenia cunninghami, although males showed slower cooling rates than females. On the other hand, Ibargüengoytía (2005) reported that females of Phymaturus patagonicus had slower heating rates than males, as we found for L. tenuis. However, these authors did not give hypotheses to explain these sexual variations in heating exchange.…”

Section: Discussionsupporting

confidence: 83%

Intraspecific variation in a physiological thermoregulatory mechanism: the case of the lizard Liolaemus tenuis (Liolaeminae)

Vidal

Ortíz

Labra

2008

Rev. chil. hist. nat.

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Intraspecific variation in a physiological thermoregulatory mechanism: the case of the lizard Liolaemus tenuis (Liolaeminae) Blindern, N-0316 Oslo, Norway; *e-mail for correspondence: marvidal@udec.cl, marcela.vidal@gmail.com ABSTRACTThe interspecific variation of heating rates in Liolaemus lizards, suggests an adaptive value of this physiological thermoregulatory mechanism, which would allow lizards to cope with the environmental thermal restrictions, imposed to behavioral thermoregulation. This trend has barely been tested at intraspecific level, and here we explore if intraspecific variation in heating rates occurs in Liolaemus tenuis, a relative widely distributed species from central Chile. We test the hypothesis that heating rates are related to the thermal environmental conditions at which populations are exposed, by comparing the heating rates of three populations (from a latitudinal range), which inhabit under different thermal conditions. Additionally, we explore if the intrinsic factor, sex, also modulates heating rates. There was a significant intraspecific variation in heating rates, at population and gender level. These rates however, showed only a partial relationship with the environmental thermal conditions. We found that the northern population, inhabiting at higher temperature, heated slower, which might reduce the risk of overheating. On the other hand, independent of the population, females heated slower than males. The meaning of this sexual variation is unclear, but may be consequence of the significant differences in genders' social behavior. Because males defend a territory with a harem, by heating faster, they can allocate extra time in behaviors associated to the defense and maintenance of the territory.

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“…In this context, P. palluma was found basking on rocks with the body surface exposed to the substrate. This may indicate that heat surface accounts for a greater percentage of body temperature variance, and suggests a predominantly thigmotherm behavior such as that found in P. patagonicus (IBARGÜENGOYTÍA 2005).…”

Section: Discussionmentioning

confidence: 85%

“…Body temperature is often influenced by activity time (PAULISSEN 1999) and the daily thermal cycle (WINNE & KECK 2004) to maximize prey ingestion, digestive efficiency, reproduction and growth (IBARGÜENGOYTÍA 2005). We found that P. palluma lizards had a bimodal daily activity pattern and most individuals were active between 11:00-13:30 and between 15:30-18:00 h. In general, lizards are cool in the early morning just after they emerge from their refuges and warm up at different rates until they have reached the body temperature at which they will remain active for the rest of the day (HABIT & ORTIZ 1996b, PAULISSEN 1999, IBARGUENGOYTÍA 2005, LABRA et al 2008).…”

Section: Discussionmentioning

confidence: 99%

Thermoregulation and activity pattern of the high-mountain lizard Phymaturus palluma (Tropiduridae) in Chile

Vidal¹,

Habit²,

Victoriano³

et al. 2010

Zoologia (Curitiba, Impr.)

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ABSTRACT. Behavioral and physiological mechanisms of thermoregulation in ectotherms are conditioned by thermal constraints. These mechanisms may be even more restrictive when environmental conditions are unfavorable for individuals, especially when sexual dimorphism segregates the sexes spatially. In order to understand behavioral and physiological regulation mechanisms, we investigated the thermal biology of Phymaturus palluma (Molina, 1782), a sexually size dimorphic, high-mountain lizard that inhabits extreme climatic conditions. P. palluma showed a bimodal activity pattern, a major peak in the morning (11:00-13:30h) and in the afternoon (15:30-18:00 h). The lizards were more active when substrate temperatures were between 25 and 28° C. The highest abundance was found around 27º C (between 11:00-12:30). Females showed greater activity than males in the early morning. Sub-adults and juveniles did not show differences in their activity pattern. There was a positive relationship between body temperature and air and substrate temperatures, suggesting typically thigmothermal regulation.

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Field, selected body temperature and thermal tolerance of the syntopic lizards Phymaturus patagonicus and Liolaemus elongatus (Iguania: Liolaemidae)

Cited by 58 publications

References 30 publications

Living in a caatinga-rocky field transitional habitat: ecological aspects of the whiptail lizard Cnemidophorus ocellifer (Teiidae) in northeastern Brazil

Living in a caatinga-rocky field transitional habitat: ecological aspects of the whiptail lizard Cnemidophorus ocellifer (Teiidae) in northeastern Brazil

Intraspecific variation in a physiological thermoregulatory mechanism: the case of the lizard Liolaemus tenuis (Liolaeminae)

Thermoregulation and activity pattern of the high-mountain lizard Phymaturus palluma (Tropiduridae) in Chile

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