Arid
How often do lizards "run on empty"?
Huey, RB; Pianka, ER; Vitt, LJ
通讯作者Huey, RB
来源期刊ECOLOGY
ISSN0012-9658
出版年2001
卷号82期号:1页码:1-7
英文摘要

Energy balance is relevant to diverse issues in ecology, physiology, and evolution. To determine whether lizards are generally in positive energy balance, we synthesized a massive data set on the proportion of individual lizards (N = 18 223) with empty stomachs (127 species), representing nine families distributed on four continents, primarily in temperate zone deserts but also in the neotropics. The average percentage of individuals with empty stomachs is low (13.2%) across all species, even among desert lizards, suggesting that most lizards are in positive energy balance. Nevertheless, species vary substantially in this regard (among all species, 0% to 66% of individuals have empty stomachs). Several patterns are detectable among species with unusually high frequencies of empty stomachs. In particular, nocturnal lizards "run on empty" more often on average than do diurnal species (24.1% vs. 10.5%); and this pattern holds even for nocturnal vs. diurnal geckos (21.2% vs. 7.2%, respectively). Several (but not all) top predators have a higher frequency of empty stomachs than do species that feed at lower trophic levels. Diet breadth and body size appear unrelated to frequency of empty stomachs. Widely foraging species sometimes have a high frequency of empty stomachs relative to sit-and-wait species, but patterns vary among continents and appear to be confounded by phylogeny and trophic level. Ant-eating specialists have uniformly low frequencies of empty stomachs. Diurnal termite specialists also have low frequencies of empty stomachs, but nocturnal ones have high frequencies. Lizards from certain families (Gekkonidae [including Pygopodidae],Gymnophthlamidae, and Varanidae) are more likely to have empty stomachs than an those of other families (Agamidae, Iguanidae, Lacertidae, Scincidae, and Teiidae).


英文关键词body size, impact on feeding success dietary specialization, impact on feeding success energetics energy balance of individual lizards feeding success, diurnal vs. nocturnal lizards feeding success of lizards, desert and Neotropical lizards, diet and energetics nocturnality trophic level, impact on feeding success
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000166488200001
WOS关键词FIELD ENERGETICS ; FORAGING MODE ; ADAPTATION ; ENERGY ; GECKO
WOS类目Ecology
WOS研究方向Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/140616
作者单位(1)Univ Washington, Dept Zool, Seattle, WA 98195 USA;(2)Univ Texas, Sect Integrat Biol, Sch Life Sci, Patterson Labs, Austin, TX 78712 USA;(3)Univ Oklahoma, Sam Noble Oklahoma Museum Nat Hist, Norman, OK 73072 USA;(4)Univ Oklahoma, Dept Zool, Norman, OK 73072 USA
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GB/T 7714
Huey, RB,Pianka, ER,Vitt, LJ. How often do lizards "run on empty"?[J],2001,82(1):1-7.
APA Huey, RB,Pianka, ER,&Vitt, LJ.(2001).How often do lizards "run on empty"?.ECOLOGY,82(1),1-7.
MLA Huey, RB,et al."How often do lizards "run on empty"?".ECOLOGY 82.1(2001):1-7.
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