QUICK SEARCH:   [advanced] Author: Keyword(s):
Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents

This Article Summary Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Gibbs, A. G. Articles by Matzkin, L. M. Search for Related Content PubMed PubMed Citation Articles by Gibbs, A. G. Articles by Matzkin, L. M.

Evolution of water balance in the genus Drosophila

Allen G. Gibbs^1,2,* and Luciano M. Matzkin³

¹ Center for Insect Science and
² Department of Ecology and Evolutionary Biology, 1041 E. Lowell Street, University of Arizona, Tucson, AZ 85721, USA and
³ Department of Ecology and Evolution, State University of New York-Stony Brook, Stony Brook, NY 11794, USA

View larger version (23K): [in a new window]   Fig. 1. Phylogeny of the Drosophila species used in this study. Collection data and further information are provided in Table1.

View larger version (17K): [in a new window]   Fig. 2. Relationship between body mass and desiccation resistance (survival time) in 20 Drosophila species. Open symbols, males; filled symbols, females. Circles, mesic species; triangles, desert species. Regression equations were: males, T=5.70+8.71M; r2=0.20, P=0.058; females, T=4.34+8.43M; r2=0.27, P=0.020, where T is survival time and M is body mass.

View larger version (17K): [in a new window]   Fig. 3. Relationship between body mass and rates of water loss in 29 Drosophila species. Open symbols, males; filled symbols, females. Circles, mesic species; triangles, desert species.

View larger version (13K): [in a new window]   Fig. 4. Relationship between body mass and water content in 29 Drosophila species. Open symbols, males; filled symbols, females. Circles, mesic species; triangles, desert species. The regression line for the combined data from both sexes is W=0.0418+0.6305M; r2=0.986, P=4.74x10-53, where W is water content and M is body mass.

View larger version (15K): [in a new window]   Fig. 5. Relationship between body mass and dehydration tolerance (proportion of initial water remaining) in 20 Drosophila species. Open symbols, males; filled symbols, females. Circles, mesic species; triangles, desert species.

View larger version (18K): [in a new window]   Fig. 6. Correlations between desiccation resistance and components of water balance in Drosophila species. To correct for the effects of body size, residuals from linear regressions are used for desiccation resistance, rate of water loss and water content. Open symbols, males; filled symbols, females. Solid lines, males; dashed line, females. See text for further details.

View larger version (19K): [in a new window]   Fig. 7. Relationship between desiccation resistance and rate of water loss in 20 Drosophila species analyzed using the method of phylogenetically independent contrasts. Open symbols, males; filled symbols, females. Separate regression lines are drawn for males and females. See text for further details.

View larger version (19K): [in a new window]   Fig. 8. Relationship between desiccation resistance and water content in 20 Drosophila species analyzed using the method of phylogenetically independent contrasts. Open symbols, males; filled symbols, females. Regression line is drawn for males. See text for further details.

View larger version (18K): [in a new window]   Fig. 9. Relationship between desiccation resistance and dehydration tolerance in 20 Drosophila species analyzed using the method of phylogenetically independent contrasts. Open symbols, males; filled symbols, females. See text for further details.