Ecology of the Columbia spotted frog in northeastern Oregon.

Treesearch Home

About Treesearch

Research & Development

	Forest Products Lab
	International Institute of Tropical Forestry
	Northern
	Pacific Northwest
	Pacific Southwest
	Rocky Mountain
	Southern

Help


	All Treesearch publications were written or produced by Forest Service personnel and are in the public domain.

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

Publication Information

Title:	Ecology of the Columbia spotted frog in northeastern Oregon.
Author(s):	Bull, Evelyn L.
Date:	2005
Source:	Gen. Tech. Rep. PNW-GTR-640. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 46 p
Station ID:	GTR-PNW-640
Description:	The Columbia spotted frog (Rana luteiventris) is one of several amphibians in the Western United States experiencing population declines. The breeding, postbreeding, and overwintering habitat and ecology of this species were investigated in 10 study sites in northeastern Oregon from 1997 through 2004. A variety of habitats with permanent water were used as breeding sites and as postbreeding habitat during the summer. Ice-covered ponds, warm springs, rivers, and seeps in forested habitats were used for overwintering. Diet consisted of a wide variety of mollusks and arthropods with beetles, ants, wasps, and flies composing more than 50 percent. Population size was as high as 135 females at one site, and ratios of males to females ranged from 1.0 to 2.8. The oldest male and female were 9.7 and 8.7 years old, respectively, based on skeletochronology. Males reached sexual maturity at 1 year 9 months after metamorphosis and most females at 2 years 9 months after metamorphosis. One female laid eggs in up to 3 consecutive years. Size (snout-vent length) was not a good indicator of age in frogs older than 2 years. Long-term monitoring is necessary to determine the effects of a variety of disturbance factors and chytrid fungus that could influence spotted frog populations in northeastern Oregon.
Keywords:	Columbia spotted frog, Rana luteiventris, northeastern Oregon, amphibian ecology
	View and Print this Publication (1.84 MB)
Publication Notes:	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. You may send email to pubrequest@fs.f ed.us to request a hard copy of this publication. (Please specify exactly which publication you are requesting and your mailing address.)
	Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

Citation

Bull, Evelyn L. 2005. Ecology of the Columbia spotted frog in northeastern Oregon.. Gen. Tech. Rep. PNW-GTR-640. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 46 p

US Forest Service - Research & Development
Last Modified: January 12, 2009