Effect of Incubation Temperature on Morphology, Growth, and Survival of Juvenile Sceloporus undulatus

Andrews, Robin M.; Mathies, Tom; Warner, Daniel A.

doi:10.2307/1467055

Cited by 154 publications

(163 citation statements)

References 21 publications

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“…It is therefore likely that male disinterest was prompted by more than simple sex misidentification (which additionally could exacerbate rejection of ornamented females in the field, [11]). Delayed laying and hatching of ornamented female clutches may reflect delayed mating owing to male disinterest, and may reduce male (and female) fitness owing to lower offspring survival caused by limited time to secure energetic reserves before overwintering ( [16], but see [17]). …”

Section: Discussionmentioning

confidence: 99%

Bearded ladies: females suffer fitness consequences when bearing male traits

Swierk

Langkilde

2013

Biol. Lett.

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A central assumption in evolutionary biology is that females of sexually dimorphic species suffer costs when bearing male secondary sexual traits, such as ornamentation. Nevertheless, it is common in nature to observe females bearing rudimentary versions of male ornaments (e.g. 'bearded ladies'), as ornaments can be under similar genetic control in both sexes. Here, we provide evidence that masculinized females incur both social and reproductive costs in nature. Male fence lizards (Sceloporus undulatus) discriminated against ornamented females during mate choice. Ornamented females had lower reproductive output, and produced eggs that were laid and hatched later than those of non-ornamented females. These findings support established theories of the evolution of sexual dimorphism and intralocus sexual conflict, and raise questions regarding the persistence of masculinizing ornamentation in females.

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Section: Discussionmentioning

confidence: 99%

Bearded ladies: females suffer fitness consequences when bearing male traits

Swierk

Langkilde

2013

Biol. Lett.

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“…This type of direct effect of temperature on hatchling phenotype in reptiles has been documented numerous times (for a review, see Booth, 2006) and is not limited to body size; temperature also affects shape, color, behavior and growth. Hatchling size, in turn, affects fitness in Uta (Ferguson and Fox, 1984), as well as in other lizards (Andrews et al, 2000;Telemeco et al, 2010), suggesting that climate warming could increase lizard fitness as a result of changes in offspring size alone. Incubation temperature also affects hatchling thermoregulation (Goodman and Walguarnery, 2007) and locomotor performance (Elphick and Shine, 1998;Hare et al, 2008), which could impact fitness.…”

Section: Discussionmentioning

confidence: 99%

Effects of night-time warming on temperate ectotherm reproduction: potential fitness benefits of climate change for side-blotched lizards

Clarke

Zani

2012

Journal of Experimental Biology

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SUMMARYTemperate ectotherms, especially those at higher latitudes, are expected to benefit from climate warming, but few data yet exist to verify this prediction. Furthermore, most previous studies on the effects of climate change utilized a model of uniform annual change, which assumes that temperature increases are symmetric on diurnal or seasonal time scales. In this study, we simulated observed trends in the asymmetric alteration of diurnal temperature range by increasing night-time temperatures experienced by female lizards during their ovarian cycle as well as by the resulting eggs during their incubation. We found that higher night-time temperatures during the ovarian cycle increased the probability of reproductive success and decreased the duration of the reproductive cycle, but did not affect embryo stage or size at oviposition, clutch size, egg mass or relative clutch mass. Furthermore, higher incubation temperatures increased hatchling size and decreased incubation period but had no effect on incubation success. Subsequent hatchlings were more likely to survive winter if they hatched earlier, though our sample size of hatchlings was relatively small. These findings indicate that higher night-time temperatures mainly affect rate processes and that certain aspects of life history are less directly temperature dependent. As our findings confirm that climate warming is likely to increase the rate of development as well as advance reproductive phenology, we predict that warmer nights during the breeding season will increase reproductive output as well as subsequent survival in many temperate ectotherms, both of which should have positive fitness effects. Supplementary material available online at

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“…It has been documented for various species of reptiles that environmental factors can affect the development of certain morphological characters, including some scale counts and certain important features such as sex determination (e.g., Fox, 1948;Osgood, 1978;Bull and Vogt, 1979;and Andrews et al, 2000). Consequently, we considered whether the laboratory environment affected development of some of the characters studied.…”

Section: Did the Laboratory Environment Affect Morphological Characters?mentioning

confidence: 99%

Morphological Variation in a Unisexual Whiptail Lizard (Aspidoscelis exsanguis) and One of Its Bisexual Parental Species (Aspidoscelis inornata) (Reptilia: Squamata: Teiidae): Is the Clonal Species Less Variable?

Cole

Taylor

Townsend

2016

American Museum Novitates

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Two clonal lineages, each comprising multiple generations of unisexual A. exsanguis, were produced in the laboratory from two lizards that were collected at the same locality in the field. Based on 10 meristic and four additional characters, we assessed morphological scores and relative variation as follows: (1) between the two laboratory lineages; (2) between these lineages pooled and samples of A. exsanguis and the bisexual (gonochoristic) A. inornata from the field; and (3) between field samples of the clonal lizards and A. inornata from a nearby locality. The two lineages differed significantly in the means and variances of two univariate characters and the two most informative multivariate characters. Contrary to expectations, the pooled sample of cloned laboratory lineages of A. exsanguis were as variable as the bisexual species in all 10 univariate characters and four important multivariate characters.

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Effect of Incubation Temperature on Morphology, Growth, and Survival of Juvenile Sceloporus undulatus

Cited by 154 publications

References 21 publications

Bearded ladies: females suffer fitness consequences when bearing male traits

Bearded ladies: females suffer fitness consequences when bearing male traits

Effects of night-time warming on temperate ectotherm reproduction: potential fitness benefits of climate change for side-blotched lizards

Morphological Variation in a Unisexual Whiptail Lizard (Aspidoscelis exsanguis) and One of Its Bisexual Parental Species (Aspidoscelis inornata) (Reptilia: Squamata: Teiidae): Is the Clonal Species Less Variable?

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