Seasonal flexibility of organ mass and intestinal function for the Andean lizard Liolaemus nigroviridis
Identifieur interne : 000950 ( Main/Merge ); précédent : 000949; suivant : 000951Seasonal flexibility of organ mass and intestinal function for the Andean lizard Liolaemus nigroviridis
Auteurs : Daniel E. Naya [Chili, Uruguay] ; Claudio Veloso [Chili] ; Pablo Sabat [Chili] ; Francisco Bozinovic [Chili]Source :
- Journal of Experimental Zoology Part A: Ecological Genetics and Physiology [ 1932-5223 ] ; 2009-04-01.
Abstract
One of the most fundamental questions in organismal ecology is how animals work in a continuously changing environment. In order to contribute to the current understanding of this question, this study evaluated seasonal changes in digestive enzymes activities, organs size, and energy reserves in Liolaemus nigroviridis, a medium‐size lizard that inhabit extreme environments in the Andes range. We found that digestive enzymes (trehalase, maltase, and aminopeptidase‐N) hydrolytic activities, dry masses of digestive organs and liver, and energy reserve (dry mass of fat bodies and tail energy density) were greater during summer than during winter months. By contrast, dry mass of the kidneys, lungs, heart, and gonads were greater during winter (though significance was reach only for the last two organs). In summary, obtained results reinforce the idea that hibernation is connected with phenotypic adjustments at different organizational levels, which in turn, potentially affects rates of energy acquisition and expenditure, organisms' fitness, and, ultimately, ecological and evolutionary success of species living in highly seasonal environments. We suggest that, owing to the pressing need to explain and predict the impact of climatic change on the biota, more studies destined to determine the levels and limits of physiological flexibility are necessary. J. Exp. Zool. 311A:270–277, 2009. © 2009 Wiley‐Liss, Inc.
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DOI: 10.1002/jez.525
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Naya</name></author><author><name sortKey="Veloso, Claudio" sort="Veloso, Claudio" uniqKey="Veloso C" first="Claudio" last="Veloso">Claudio Veloso</name></author><author><name sortKey="Sabat, Pablo" sort="Sabat, Pablo" uniqKey="Sabat P" first="Pablo" last="Sabat">Pablo Sabat</name></author><author><name sortKey="Bozinovic, Francisco" sort="Bozinovic, Francisco" uniqKey="Bozinovic F" first="Francisco" last="Bozinovic">Francisco Bozinovic</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:C5D0F2C0AD15553A780C3B776168FBC590D42701</idno><date when="2009" year="2009">2009</date><idno type="doi">10.1002/jez.525</idno><idno type="url">https://api.istex.fr/document/C5D0F2C0AD15553A780C3B776168FBC590D42701/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000C84</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000C84</idno><idno type="wicri:Area/Istex/Curation">000C82</idno><idno type="wicri:Area/Istex/Checkpoint">000411</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">000411</idno><idno type="wicri:doubleKey">1932-5223:2009:Naya D:seasonal:flexibility:of</idno><idno type="wicri:Area/Main/Merge">000950</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Seasonal flexibility of organ mass and intestinal function for the Andean lizard Liolaemus nigroviridis</title><author><name sortKey="Naya, Daniel E" sort="Naya, Daniel E" uniqKey="Naya D" first="Daniel E." last="Naya">Daniel E. 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Exp. Zool.</title><idno type="ISSN">1932-5223</idno><idno type="eISSN">1932-5231</idno><imprint><publisher>Wiley Subscription Services, Inc., A Wiley Company</publisher><pubPlace>Hoboken</pubPlace><date type="published" when="2009-04-01">2009-04-01</date><biblScope unit="volume">311A</biblScope><biblScope unit="issue">4</biblScope><biblScope unit="page" from="270">270</biblScope><biblScope unit="page" to="277">277</biblScope></imprint><idno type="ISSN">1932-5223</idno></series><idno type="istex">C5D0F2C0AD15553A780C3B776168FBC590D42701</idno><idno type="DOI">10.1002/jez.525</idno><idno type="ArticleID">JEZ525</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">1932-5223</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">One of the most fundamental questions in organismal ecology is how animals work in a continuously changing environment. In order to contribute to the current understanding of this question, this study evaluated seasonal changes in digestive enzymes activities, organs size, and energy reserves in Liolaemus nigroviridis, a medium‐size lizard that inhabit extreme environments in the Andes range. We found that digestive enzymes (trehalase, maltase, and aminopeptidase‐N) hydrolytic activities, dry masses of digestive organs and liver, and energy reserve (dry mass of fat bodies and tail energy density) were greater during summer than during winter months. By contrast, dry mass of the kidneys, lungs, heart, and gonads were greater during winter (though significance was reach only for the last two organs). In summary, obtained results reinforce the idea that hibernation is connected with phenotypic adjustments at different organizational levels, which in turn, potentially affects rates of energy acquisition and expenditure, organisms' fitness, and, ultimately, ecological and evolutionary success of species living in highly seasonal environments. We suggest that, owing to the pressing need to explain and predict the impact of climatic change on the biota, more studies destined to determine the levels and limits of physiological flexibility are necessary. J. Exp. Zool. 311A:270–277, 2009. © 2009 Wiley‐Liss, Inc.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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