Ecologia térmica do lagarto Sceloporus gadoviae (Squamata: Phrynosomatidae) em uma região semi-árida do sul de Puebla, México.

Woolrich-Piña, Guillermo A.; Lemos‐Espinal, Julio A.; Smith, Geoffrey R.; Oliver-López, Luis; Correa-Sánchez, Felipe; Altamirano-Álvarez, Tizoc A.; Montoya-Ayala, Raymundo

doi:10.11606/issn.2316-9079.v11i1p21-27

Cited by 4 publications

(4 citation statements)

References 21 publications

(20 reference statements)

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“…Intersexual differences in T b may be common in species exhibiting SSD (Lailvaux ), and a similar female‐biased pattern has been detected in at least one other species of Sceloporus , S. gadoviae (Woolrich‐Piña et al. ).…”

Section: Discussionmentioning

confidence: 60%

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Differences in the thermal physiology of adult Yarrow's spiny lizards (Sceloporus jarrovii) in relation to sex and body size

Beal

Lattanzio

Miles

2014

Ecology and Evolution

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Sexual size dimorphism (SSD) is often assumed to reflect the phenotypic consequences of differential selection operating on each sex. Species that exhibit SSD may also show intersexual differences in other traits, including field-active body temperatures, preferred temperatures, and locomotor performance. For these traits, differences may be correlated with differences in body size or reflect sex-specific trait optima. Male and female Yarrow's spiny lizards, Sceloporus jarrovii, in a population in southeastern Arizona exhibit a difference in body temperature that is unrelated to variation in body size. The observed sexual variation in body temperature may reflect divergence in thermal physiology between the sexes. To test this hypothesis, we measured the preferred body temperatures of male and female lizards when recently fed and fasted. We also estimated the thermal sensitivity of stamina at seven body temperatures. Variation in these traits provided an opportunity to determine whether body size or sex-specific variation unrelated to size shaped their thermal physiology. Female lizards, but not males, preferred a lower body temperature when fasted, and this pattern was unrelated to body size. Larger individuals exhibited greater stamina, but we detected no significant effect of sex on the shape or height of the thermal performance curves. The thermal preference of males and females in a thermal gradient exceeded the optimal temperature for performance in both sexes. Our findings suggest that differences in thermal physiology are both sex- and size-based and that peak performance at low body temperatures may be adaptive given the reproductive cycles of this viviparous species. We consider the implications of our findings for the persistence of S. jarrovii and other montane ectotherms in the face of climate warming.

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Section: Discussionmentioning

confidence: 60%

“…For some lizard species, body temperature differences between males and females may be a consequence of either body size or sex‐specific differences in trait optima (Stevenson ; Woolrich‐Piña et al. ). Males and females of species exhibiting SSD may therefore differ in thermal physiology that is unrelated to size.…”

Section: Introductionmentioning

confidence: 99%

Differences in the thermal physiology of adult Yarrow's spiny lizards (Sceloporus jarrovii) in relation to sex and body size

Beal

Lattanzio

Miles

2014

Ecology and Evolution

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“…Sex and reproductive status in Sceloporus have previously been reported to affect individual thermoregulatory behavior. In some species, gravid Sceloporus females exhibited higher body temperatures compared to nongravid females and males ( S. gadoviae : Woolrich‐Piña et al., 2012; S. jarrovii: Beal et al., 2014). Alternatively, in other species gravid Sceloporus females were documented to maintain lower body temperatures compared to other adults in the population ( S. scalaris : Smith et al., 1993; S. virgatus : Smith & Ballinger, 1994).…”

Section: Discussionmentioning

confidence: 99%

“…Nevertheless, there are oviparous lizard species where gravid females regulate their body temperatures differently than other adults in the population to benefit embryonic development as well as hatching success (refer to Angilletta et al., 2000; Rodríguez‐Díaz & Braña, 2011; Rodríguez‐Díaz et al., 2010; Telemeco et al., 2010). Of the few such species studied, some gravid females maintain higher body temperatures (Dayananda et al., 2017; Juri et al., 2018; Werner, 1990; Woolrich‐Piña et al., 2012), whereas other species maintain lower body temperatures (Schall, 1977; Smith & Ballinger, 1994; Smith et al., 1993). A selective advantage for maintaining higher body temperatures while gravid may be that it results in fewer incubation days (Shine, 1980).…”

Section: Introductionmentioning

confidence: 99%

Influence of size, sex, and reproductive status on the thermal biology of endemic Florida scrub lizards

Gainsbury

2020

Ecology and Evolution

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Climate change is impacting species globally, with many populations declining at an accelerated rate toward extinction. Ectothermic species are particularly vulnerable given their reproductive success is linked to environmental temperatures. Studies of the effect of temperature on reproductive success in oviparous squamates have focused mostly on nest temperatures, after eggs are deposited. However, in some species gravid females are known to thermoregulate differently than other adults to increase reproductive success. It is essential to understand what influences the thermal biology of breeding adults in a population to implement targeted conservation strategies. The Florida scrub lizard Sceloporus woodi is an endemic species listed as near-threatened due to decreasing populations. This study is the first to document the thermal biology of these breeding adults in relation to size, sex, and reproductive status. A t test was used to determine whether sexual dimorphism was present in the sampled S. woodi. Full linear mixed-effects models were used to test the influence of size, sex, and reproductive status on the thermal biology of S. woodi. Despite femalebiased sexual size dimorphism, there were no sex-based differences in body temperature in the studied population. Interestingly, reproductive status influenced thermal biology of females during the breeding season, with gravid females maintaining lower body temperatures compared to nongravid females. However, gravid females did not regulate their body temperatures more precisely compared to nongravid females. These results indicate the population viability of this endemic species is potentially linked to the different thermoregulatory requirements of gravid females as compared to other adults. Lower body temperatures of gravid females, exacerbated by their lack of thermal precision, have disconcerting conservation implications in the face of climate warming. Future studies focusing on gravid females are warranted to attain effective biodiversity conservation strategies mitigating the impacts of climate warming.

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Do gravid female Anolis nebulosus thermoregulate differently than males and non-gravid females?

Woolrich-Piña¹,

Smith

Lemos‐Espinal

et al. 2015

Journal of Thermal Biology

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Ecologia térmica do lagarto Sceloporus gadoviae (Squamata: Phrynosomatidae) em uma região semi-árida do sul de Puebla, México.

Cited by 4 publications

References 21 publications

Differences in the thermal physiology of adult Yarrow's spiny lizards (Sceloporus jarrovii) in relation to sex and body size

Differences in the thermal physiology of adult Yarrow's spiny lizards (Sceloporus jarrovii) in relation to sex and body size

Influence of size, sex, and reproductive status on the thermal biology of endemic Florida scrub lizards

Do gravid female Anolis nebulosus thermoregulate differently than males and non-gravid females?

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