. Advances in herpetology and evolutionary biology : essays in honor of Ernest E. Williams. Williams, Ernest E. (Ernest Edward); Herpetology; Evolution. Physiological Ecology of a Lizard • Huey 485 eralized to incorporate additional physi- ological (, digestion, growth, repro- duction) and ecological (, environ- mental productivity, risks of predation) information (Huey and Slatkin, 1976). BACKGROUND ECOLOGICAL DATA The body temperature (T^) of the trunk-ground lizard Anolis cristatellus depends upon habitat, time of day, and thermoregulatory behavior. In open habi- tats where basking
. Advances in herpetology and evolutionary biology : essays in honor of Ernest E. Williams. Williams, Ernest E. (Ernest Edward); Herpetology; Evolution. Physiological Ecology of a Lizard • Huey 485 eralized to incorporate additional physi- ological (, digestion, growth, repro- duction) and ecological (, environ- mental productivity, risks of predation) information (Huey and Slatkin, 1976). BACKGROUND ECOLOGICAL DATA The body temperature (T^) of the trunk-ground lizard Anolis cristatellus depends upon habitat, time of day, and thermoregulatory behavior. In open habi- tats where basking sites are frequently available on lower tree trunks, these liz- ards bask early and late in the day and behaviorally control body temperatures at relatively high and constant levels (Fig. 1, from Huey, 1974). However, in a nearby forest where basking sites are few and distant, these lizards rarely bask, and thus are thermoconformers. Consequent- ly, average body temperatures in the forest are relatively low and variable (Fig. 1). (Males and females did not differ significantly in T, in any census.) Com- parable patterns have been documented for other Anolis (Lister, 1976; Lee, 1980; Hertz and Huey, 1981). In laboratory thermal gradients, lizards from both forest and open habitats prefer "32 i;30- E •"26 m24 open park 1 .^*—k^^^ -\- J L Anolis cristatellus J L 0800 1200 1600 Time of Day Figure 1. Body temperatures of AnoWs cristatellus in an open and in a forest habitat in lowland Puerto Rico (redrawn from Huey, 1974). Vertical lines represent range, horizontal lines indicate means, and boxes en- close 95% confidence limits of the means. an average body temperature of °C (Huey and Webster, 1976). In nature, liz- ards in the open habitat reach these temperatures very early in the day by basking (Fig. 1). However, the high en- vironmental temperatures in this habitat at midday apparently force these lizards to be active at temperatures a few de- grees
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Keywords: ., bookauthorharvarduniver, bookcentury1900, booksubjectherpetology
