Ontogenetic Changes in Diet, Field Metabolic Rate, and Water Flux in the                Herbivorous Lizard Dipsosaurus dorsalis

Mautz, William J.; Nagy, Kenneth A.

doi:10.1086/physzool.60.6.30159980

Cited by 55 publications

(32 citation statements)

References 12 publications

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“…Extensive use of plant matter, as a main food resource, is constrained by body size (allometric constraint hypothesis). Smaller lizards have higher energy requirements relative to body size (Pough, 1973;Troyer, 1984;Mautz and Nagy, 1987;Zimmerman and Tracy, 1989;Zari, 1991) and for this reason, the majority of 'small' species show a marked preference for a diet based on invertebrates (Ostrom, 1963;Sokol, 1967;Pough, 1973;Greene, 1982;Demment and Van Soest, 1985;Bozinovic, 1993;King, 1996;Van Damme, 1999). Furthermore, Ostrom (1963) and Sokol (1967) indicated that smaller lizards do not have suf cient jaw power to crush plant matter ef ciently; therefore, only large lizards can successfully exploit it.…”

Section: Morphological and Anatomical Traitsmentioning

confidence: 99%

“…However more extreme deviations from this model are known, and expected, under particular ecological situations, such as low predation risk, behavioral and/or physiological mechanisms, resource availability and thermoregulatory behavior (Pough, 1973;Throckmorton, 1973;Johnson and Lillywhite, 1979;Greene, 1982;Van Devender, 1982;Schluter, 1984;Waldschmidt et al, 1986;Mautz and Nagy, 1987;Zimmerman and Tracy, 1989;Van Marken Lichtenbelt, 1992;Bozinovic, 1993;Dearing, 1993;Van Damme, 1999). Furthermore, it is interesting to note that those lizard species in which poor-ber plant parts (fruits and owers) constitute the main part of the plant component do not show speci c anatomical traits to digest cellulose as occurs in folivorous lizard species (Iverson, 1982;Cooper and Vitt, 2002).…”

Section: Morphological and Anatomical Traitsmentioning

confidence: 99%

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Digestive ecology of two omnivorous Canarian lizard species (Gallotia, Lacertidae)

Valido¹,

Nogales²

2003

Amphib Reptilia

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Abstract. Omnivorous endemic Canarian lacertids (Gallotia atlantica and G. galloti) do not present any speci c digestive and physiological adaptations to herbivorous diet, compared to species and populations with a different degree of herbivory in the Canarian archipelago. The only characteristics that could be related to the type of diet were the number of cusps per tooth (between species) and the number of small stones contained in droppings (between species and populations). The rest of measured traits were correlated with lizard size and for this reason G. galloti has longer intestines, heavier stomachs and livers, more teeth and cusps, and longer gut passage. These data suggest that body size is a major determinant of the reliance on plant food (mainly eshy fruits) in these lizards and facilitates mutualistic interactions with eshy-fruited plant species.

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Section: Morphological and Anatomical Traitsmentioning

confidence: 99%

Section: Morphological and Anatomical Traitsmentioning

confidence: 99%

Digestive ecology of two omnivorous Canarian lizard species (Gallotia, Lacertidae)

Valido¹,

Nogales²

2003

Amphib Reptilia

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“…The lizard studies that have subdivided the total daily energy expenditure into its components have demonstrated that widely foraging species have higher %ARs than sit-and-wait foragers (Anderson & Karasov 1981;Nagy, Huey & Bennett 1984) and that the proportion of energy used in activity (as well as the daily total) can change seasonally (Alexander & Whitford 1968;Merker & Nagy 1984;Christian & Tracy 1985;Mautz & Nagy 1987;Christian & Weavers 1994;Christian et al 1995;Christian, Griffiths & Bedford 1996a;Christian et al 1996b,c).…”

Section: Introductionmentioning

confidence: 99%

Energetic costs of activity by lizards in the field

Christian¹,

Baudinette

Pamula

1997

Functional Ecology

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Summary 1.The available data related to the activity energetics of lizards in the field were collated with respect to three indices of activity energetics: the ecological cost of transport (ECT) expressed as a percentage of the total energy, the proportion of total energy used in all forms of activity (%AR), and the sustained metabolic scope (SusMS), defined as the ratio of the total energy expenditure to the total resting metabolism. 2. The ECT values of lizards ranged from 3 to 36% with five of 11 species having values >20%. The percentage AR ranged from 23 to 80% for lizards during active seasons, with most species having values > 50%. The SusMS ranged from 1·1 to 5·1. 3. Values of ECT are higher for lizards than for mammals, in part because the costs of maintenance metabolism are higher in mammals. 4. The percentage AR and SusMS values of mammals are higher than those of lizards. 5. It follows from the previous two points that the proportion of the total daily energy that is expended in non-locomotory activities is disproportionately higher in mammals compared with lizards. 6. The energy expended in locomotion is a significant portion of the energy budget of lizards. This is generally true for all seasons in which there is activity.

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“…The values are comparable to those of herbivorous iguanids (Mautz and Nagy, 1987;Durtsche, 2000). Within Teiidae, two species of Caribbean Cnemidophorus are considered to be strict herbivores as adults, whereas juveniles are insectivorous (Vitt et al, 2005).…”

Section: Discussionmentioning

confidence: 66%

“…Body temperature of D. guttulatum was on average 32.2 6 1.8uC during activity in Bayovar. The similar-sized herbivorous iguanid Dipsosaurus dorsalis has an energy expenditure of 3.66 kJ day 21 for adults with body temperature of 30uC and 6.2 kJ day 21 with a body temperature of 35uC (Mautz and Nagy, 1987 , with the assumption that the energetic content of other diet items combined is equal to that of P. pallida leaves on average. Prosopis pallida seedlings in Piura had an aboveground growth rate of only 0.009-0.016 g DM day 21 (Squeo et al, 2007;Havik, 2010).…”

Section: Discussionmentioning

confidence: 99%

Spatial, Ontogenetic, and Sexual Effects on the Diet of a Teiid Lizard in Arid South America

Leeuwen

Catenazzi

Holmgren

2011

Journal of Herpetology

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Ontogenetic Changes in Diet, Field Metabolic Rate, and Water Flux in the Herbivorous Lizard Dipsosaurus dorsalis

Cited by 55 publications

References 12 publications

Digestive ecology of two omnivorous Canarian lizard species (Gallotia, Lacertidae)

Digestive ecology of two omnivorous Canarian lizard species (Gallotia, Lacertidae)

Energetic costs of activity by lizards in the field

Spatial, Ontogenetic, and Sexual Effects on the Diet of a Teiid Lizard in Arid South America

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