Survival costs associated with wood frog breeding migrations: effects of timber harvest and droughtAuthor(s): Tracy A.G. Rittenhouse; Raymond D. Semlitsch; Frank R. III Thompson
Source: Ecology. 90(6): 1620-1630.
Publication Series: Scientific Journal (JRNL)
Station: Northern Research Station
PDF: Download Publication (184.04 KB)
Migration presents a trade-off for individuals between the potential fitness benefits of reaching high-quality habitat vs. the potential costs of migration. Within an information-theoretic framework, we examined the costs of migration for adult wood frogs (Rana sylvatica) in response to timber harvest and annual weather conditions using Cox proportional-hazard estimates of survival. In 2004 prior to timber harvest, survival did not differ between the inside (0.75, SE = 0.078) and outside (0.73, SE = 0.235) of the circular timber harvest arrays (each 164 m radius). Following timber harvest, survival inside arrays in both 2005 and 2006 (0.22, SE=0.065; 0.42, SE=0.139) was lower than survival outside of the arrays and prior to harvest. Sources of mortality included predation in all years and desiccation in the drought year of 2005. The most-supported models for explaining both predation and desiccation risks reflected behaviors as opposed to timber harvest or weather conditions. Both predation and desiccation risks increased when frogs made frequent movements or were located near breeding ponds.
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, email@example.com if you notice any errors which make this publication unusable.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationRittenhouse, Tracy A.G.; Semlitsch, Raymond D.; Thompson, Frank R. III. 2009. Survival costs associated with wood frog breeding migrations: effects of timber harvest and drought
Keywordsanuran, desiccation, drought, predation, radiotelemetry, Rana sylvatica, timber harvest, wood frogs
- Differences in sensitivity to the fungal pathogen Batrachochytrium dendrobatidis among amphibian populations
- A telemetric study of the movement patterns and habitat use of Rana muscosa, the mountain yellow-legged frog, in a high-elevation basin in Kings Canyon National Park, California
- The response of Rana muscosa, the mountain yellow-legged frog, to short distance translocations.
XML: View XML