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  • 1
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    Mechanisms of adaptation in a predator-prey arms race: TTX-resistant sodium channels (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-08-24
    Description: Populations of the garter snake Thamnophis sirtalis have evolved geographically variable resistance to tetrodotoxin (TTX) in a coevolutionary arms race with their toxic prey, newts of the genus Taricha. Here, we identify a physiological mechanism, the expression of TTX-resistant sodium channels in skeletal muscle, responsible for adaptive diversification in whole-animal resistance. Both individual and population differences in the ability of skeletal muscle fibers to function in the presence of TTX correlate closely with whole-animal measures of TTX resistance. Demonstration of individual variation in an essential physiological function responsible for the adaptive differences among populations is a step toward linking the selective consequences of coevolutionary interactions to geographic and phylogenetic patterns of diversity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Geffeney, Shana -- Brodie, Edmund D Jr -- Ruben, Peter C -- Brodie, Edmund D 3rd -- New York, N.Y. -- Science. 2002 Aug 23;297(5585):1336-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Utah State University, Logan, UT 84322, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12193784" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Adaptation, Physiological ; Animals ; *Biological Evolution ; Colubridae/*physiology ; Drug Resistance ; Linear Models ; Locomotion/drug effects ; Muscle Fibers, Skeletal/drug effects/physiology ; Muscle, Skeletal/drug effects/*physiology ; Neuromuscular Junction/drug effects/physiology ; Predatory Behavior ; *Salamandridae/metabolism ; Skin/chemistry ; Sodium Channels/*drug effects/physiology ; Tetrodotoxin/*toxicity ; United States
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    How the horned lizard got its horns (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-04-03
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Young, Kevin V -- Brodie, Edmund D Jr -- Brodie, Edmund D 3rd -- New York, N.Y. -- Science. 2004 Apr 2;304(5667):65.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Utah State University, Logan, UT 84322-5305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15001716" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Female ; Lizards/*anatomy & histology ; Male ; *Predatory Behavior ; *Selection, Genetic ; *Songbirds
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Parent-offspring coadaptation and the dual genetic control of maternal care (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-06-02
    Description: In many animal species, the amount of care provided by parents is determined through a complex interaction of offspring signals and responses by parents to those signals. As predicted by honest signaling theory, we show that in the burrower bug, Sehirus cinctus, maternal provisioning responds to experimental manipulations of offspring condition. Despite this predicted environmental influence, we find evidence from two cross-foster experiments that variation in maternal care also stems from two distinct genetic sources: variation among offspring in their ability to elicit care and variation among parents in their response to offspring signals. Furthermore, as predicted by maternal-offspring coadaptation theory, offspring signaling is negatively genetically correlated with maternal provisioning.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Agrawal, A F -- Brodie, E D 3rd -- Brown, J -- New York, N.Y. -- Science. 2001 Jun 1;292(5522):1710-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology and Center for the Integrative Study of Animal Behavior, Indiana University, Bloomington, IN 47405-3700, USA. aagrawal@bio.indiana.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11387474" target="_blank"〉PubMed〈/a〉
    Keywords: *Adaptation, Physiological ; Animals ; Biological Evolution ; Cues ; Feeding Behavior ; Female ; *Genetic Variation ; Hemiptera/*genetics/*physiology ; *Maternal Behavior ; Phenotype
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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