Toxicity of dangerous prey:: Variation of tetrodotoxin levels within and among populations of the newt Taricha granulosa

被引:87
作者
Hanifin, CT [1 ]
Yotsu-Yamashita, M
Yasumoto, T
Brodie, ED
Brodie, ED
机构
[1] Utah State Univ, Dept Biol, Logan, UT 84322 USA
[2] Tohoku Univ, Fac Agr, Aoba Ku, Sendai, Miyagi 9818555, Japan
[3] Indiana Univ, Dept Biol, Bloomington, IN 47405 USA
基金
美国国家科学基金会;
关键词
Taricha granulosa; Caudata; coevolution; tetrodotoxin; predator-prey; arms race;
D O I
10.1023/A:1021049125805
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The ability to identify and accurately measure traits at the phenotypic interface of potential coevolutionary interactions is critical in documenting reciprocal evolutionary change between species. We quantify the defensive chemical trait of a prey species, the newt Taricha granulosa, thought to be part of a coevolutionary arms race. Variation in newt toxicity among populations results from variation in levels of the neurotoxin tetrodotoxin (TTX). Individual variation in TTX levels occurs within populations. Although TTX exists as a family of stereoisomers, only two of these (TTX and 6-epi-TTX) are likely to be sufficiently toxic and abundant to play a role in the defensive ecology of the newt.
引用
收藏
页码:2161 / 2175
页数:15
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