新热带地区新生和小体型蜥蜴体型的生态后果

IF 1.1 2区 生物学 Q3 ZOOLOGY
L. Vitt
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引用次数: 58

摘要

我研究了蜥蜴身体大小和猎物大小之间的关系,特别是它与新热带地区新生蜥蜴面临的挑战有关。在体型庞大的蜥蜴中,幼蜥捕食的猎物比成年蜥小,但成年蜥继续捕食幼蜥吃的猎物。成年人吃无脊椎动物和脊椎动物,包括其他蜥蜴,就每单位风险获得的能量而言,这些动物的回报可能要高得多。在库拉乌纳附近的亚马逊雨林中,各种蜥蜴的猎物类型和大小各不相同。体型较大的蜥蜴以体型较大的猎物为食,体型较小的蜥蜴由于体型较小,不能以体型较大的蜥蜴捕食的许多猎物为食。大型蜥蜴继续捕食小型猎物。在这个组合中,蜥蜴捕食的较大的非脊椎动物主要是蜘蛛和蜈蚣,其中许多比较小的蜥蜴物种和个体要大。来自许多新热带地区的综合数据集表明,在库鲁瓦-乌纳观察到的趋势是普遍的,尽管最小的蜥蜴分支所吃的猎物比仅根据体型预测的要小。我认为小型蜥蜴,尤其是新生蜥蜴,在不同的蜥蜴群落中面临着巨大的风险,因为它们的体型相对于其他生物而言。它们可能会与自己的成年动物和其他物种竞争食物,它们被大型蜥蜴和其他脊椎动物吃掉,它们可能是大量食肉节肢动物的猎物,尤其是蜘蛛和蜈蚣。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
ECOLOGICAL CONSEQUENCES OF BODY SIZE IN NEONATAL AND SMALL-BODIED LIZARDS IN THE NEOTROPICS
I investigated the relationship between lizard body size and prey size, particularly as it relates to challenges faced by neonatal lizards in the Neotropics. Within the large-bodied teiid lizard Ameiva ameiva, juveniles feed on smaller prey than adults, but adults continue to feed on prey eaten by juveniles. Adults eat invertebrates and vertebrates, including other lizards, and these likely have a much higher payoff in terms of energy gained per unit risk. Prey types and sizes vary among lizard species in an Amazonian rain forest near the Rio Curua-Una. Larger lizard species feed on larger prey, and smaller lizards, by virtue of their small body sizes, cannot feed on many prey taken by large lizards. Large lizards continue to take small prey. The larger non-vertebrate prey taken by lizards in this assemblage are mostly spiders and centipedes, many of which are larger than smaller lizard species and individuals. A combined data set from numerous Neotropical sites shows that the trend observed at the Curua-Una is a general one even though the smallest clade of lizards eat prey smaller than predicted based on body size alone. I suggest that small lizards, neonates in particular, are at great risk in diverse lizard assemblages because of their body size relative to other organisms. They likely compete with adults of their own and other species for food, they are eaten by larger lizards and other vertebrates, and they are likely prey for numerous highly abundant predaceous arthropods, especially spiders and centipedes.
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来源期刊
Herpetological Monographs
Herpetological Monographs 生物-动物学
CiteScore
5.40
自引率
0.00%
发文量
2
审稿时长
>12 weeks
期刊介绍: Since 1982, Herpetological Monographs has been dedicated to original research about the biology, diversity, systematics and evolution of amphibians and reptiles. Herpetological Monographs is published annually as a supplement to Herpetologica and contains long research papers, manuscripts and special symposia that synthesize the latest scientific discoveries.
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