Stable hydrogen isotope analysis of bat hair as evidence for seasonal molt and long-distance migration

被引:117
作者
Cryan, PM
Bogan, MA
Rye, RO
Landis, GP
Kester, CL
机构
[1] US Geol Survey, Ft Collins Sci Ctr, Ft Collins, CO 80526 USA
[2] Univ New Mexico, US Geol Survey, Arid Lands Field Stn, Ft Collins Sci Ctr,Dept Biol, Albuquerque, NM 87131 USA
[3] US Geol Survey, Stable Isotope & Gas Chem Lab, Denver Fed Ctr, Lakewood, CO 80225 USA
关键词
deuterium; hoary bat; hydrogen; Lasiurus cinereus; migration; molt; stable isotopes;
D O I
10.1644/BRG-202
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
Although hoary bats (Lasiurus cinereus) are presumed to be migratory and capable of long-distance dispersal, traditional marking techniques have failed to provide direct evidence of migratory movements by individuals. We measured the stable hydrogen isotope ratios of bat hair (deltaD(h)) and determined how these values relate to stable hydrogen isotope ratios of precipitation (deltaD(p)). Our results indicate that the major assumptions of stable isotope migration studies hold true for hoary bats and that the methodology provides a viable means of determining their migratory movements. We present evidence that a single annual molt occurs in L. cinereus prior to migration and that there is a strong relationship between deltaD(h) and deltaD(p) during the molt period. This presumably reflects the incorporation of local deltaD(p) into newly grown hair. Furthermore, we present evidence that individual hoary bats are capable of traveling distances in excess of 2,000 km and that hair is grown at a wide range of latitudes and elevations. Stable hydrogen isotope analysis offers a promising new tool for the study of bat migration.
引用
收藏
页码:995 / 1001
页数:7
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