Title: Egg mass drift increases vulnerability during early development of Cascades frogs (Rana casadae).
Author: Justin M. Garwood; Clara A. Wheeler; Ryan M. Bourque; Monty D. Larson; and Hartwell H. Welsh, Jr.
Source: Northwestern Naturalist 88:95-97
Description: Many anuran species exhibit oviposition site selection. Female selection of oviposition sites may influence the success of offspring and increase overall fitness (Resetarits 1996). Egg mass placement (location and attachment substrate) may be determined by a number of factors including detectability by predators, water velocity, risk of desiccation or flooding, and temperature (Stebbins and Cohen 1997). Some lentic breeding anurans do not always attach their egg masses to substrates (Briggs 1987; Olson 2005; Reaser and Pilliod 2005; Wind 2005), making them vulnerable to involuntary displacement. The movement of egg masses to areas of sub-optimal conditions (for example, colder water or desiccation from stranding) may affect hatching success and overall survival of individuals (Licht 1971; Sype 1974). Here, we document high occurrences of egg mass displacement in a high-elevation breeding population of Rana cascadae (Cascades Frog).
Keywords: Cascades Frog, Rana cascadae, oviposition, reproduction, California
View and Print this Publication (43 KB)
- 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.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility
Justin M. Garwood; Clara A. Wheeler; Ryan M. Bourque; Monty D. Larson; and Hartwell H. Welsh, Jr. 2007. Egg mass drift increases vulnerability during early development of Cascades frogs (Rana casadae).. Northwestern Naturalist 88:95-97.