My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
9638
CWCB
>
UCREFRP
>
Copyright
>
9638
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
8/11/2009 11:26:21 AM
Creation date
8/10/2009 5:09:26 PM
Metadata
Fields
Template:
UCREFRP
UCREFRP Catalog Number
9638
Author
Mueller, G. A., J. Carpenter and D. Thornbrugh
Title
Bullfrog Tadpole (Rana Catesbeiana) And Red Swamp Crayfish (Procambarus ClarkII) Predation On Early Life Stages On Endangered Razorback Sucker (Xyrauchen Texanus)
USFW Year
n.d.
USFW - Doc Type
The Southwestern Naturalist
Copyright Material
YES
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
4
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
Show annotations
View images
View plain text
Jeff P_ 6- <br />258 <br />The Sbuthurestern. Naturalist <br /> <br />vol. 51, no. 2 <br />BULLFROG TADPOLE (RANA CATESBEIANA) AND RED SWAMP <br />CRAYFISH (PROCAMBARU.S CLARKin PREDATION ON EARLY LIFE <br />STAGES OF ENDANGERED RAZORBACK SUCKER <br />(XYRA UCHFN TEXANU.S) <br />GORDON A. MUELLER,* JEANETTE CARPENTER, AND DARREN Tt 1ORNBRUGH <br />United States Geological Survey, Box 250071)-8220, Denver, CO 80225 (GAM) <br />United States Geological -Survey, Fort Collins Research Center, 21.50 Centre Avenue, Building C, <br />Fort Collins, CO 800526 (JC) <br />Kansas State University, Division of Biology, 232 Ackert Hall, Manhattan, KS 66506 (DT) <br />*Correspondent: Gordan--LAluellerCusgs.gov <br />ABSTRacT-Bullfrog tadpoles (Rasta catesMana) and red swamp crayfish (T'vcartibarrrs clw-kii) are <br />widespread introduced taxa that are problematic throughout the western United States. Their <br />impact on native amphibians and crustaceans is well documented, but less is known regarding <br />their influence on native fishes. Predator-prey tank tests showed both species consumed eggs and <br />larvae of the endangered razorback sucker (Xyrauchen texanus) in a laboratory setting. Tadpoles <br />consumed 2.2 razorback sucker eggs/d and 1.4 razorback sucker larvue/d, while crayfish ate 6.0 <br />eggs/d and 3.5 larvae/d. Relatively high densities of bullfrog tadpoles and crayfish in razorback <br />sucker spawning areas suggest that these nonnative taxa might pose a threat to the recruitment <br />success of this and other imperiled native fish. <br />RcsustEN-Los renacuajos de la rana toro (Rana ca.tesbeiana) y una especie de cangrejo de rio <br />(Procambarus clarhii) son taxa no nativos problematicos con una distribuci6n geografica amplia en <br />el oeste de los Estados Unidos. Su impacto sobre anfibios y crustaceos nativos esta bien documen- <br />tado, pero su influencia sobre peces nativos es casi desconocida. Pruebas en tanques de depre- <br />dador-presa mostraron que ambas especies consumieron huevos y larvas del matalote jorobado <br />( `yrauchen texanus), una especie amenazada. Los renacuajos consumieron 2.2 huevos de X. tex- <br />an.us/dia y 1..4 larval/dia, mientras los cangrejos comieron 6.0 huevos/dia y 3.5 larvas/dia. Las <br />densidades relativamente altar de los ranacuajos de I1. catesbeiana y P. clarkii en zonas del desove <br />de X. texanus sugieren que estas especies no nativas tal vez sean una amenaza al exit.o de reclu- <br />tamiento de este y otros peces nativos amenazados. <br />Razorback sucker (Xyrauchen texanrts) is en- <br />demic to the Colorado River. Dramatic de- <br />clines in their number and range caused it to <br />be federally listed as endangered in 1991 (56 <br />FR 54957). The absence of young in the wild <br />has been attributed to predation by nonnative <br />fish (Minckley et al., 1991; Tyus and Sanders, <br />2000; Minckley et al., 2003). Recruitment levels <br />necessary to sustain populations have only oc- <br />curred in recent years in isolated ponds where <br />nonnative fishes are absent (Minckley et al., <br />1991; Minckley et al., 2003; Marsh and Pacey, <br />2005). <br />Cibola High Levee Pond (Cibola HLP) is a <br />2.3-ha human-made oxbow located on the low- <br />er Colorado River along the Arizona-Califor- <br />nia border and represents one isolated loca- <br />tion where sustainable recruitment has oc- <br />curred; however, survival of young razorback <br />suckers is intermittent. Nonnative fish are rare <br />(Mueller et al., 2005), suggesting other pred- <br />ators or factors might be responsible for the <br />periodic absence of young fish. For instance, <br />Horn et al. (1994) illustrated that razorback <br />sucker larvae are highly susceptible to odonate <br />nymphs and suggested they might also be vul- <br />nerable to other nontraditional predators. Our <br />discovery of bullfrog (Puma catesbeiana) tad- <br />poles and red swamp crayfish (Procambarus dar= <br />kii) among spawners prompted our curiosity <br />whether these introduced taxa could also <br />threaten early life stages of native fishes. <br />Laboratory Testsa-Large numbers of bullfrog <br />tadpoles and sexually ripe razorback suckers <br />were collected at Cibola HLP during routine <br />sampling in 2003. Several hundred eggs dis-
The URL can be used to link to this page
Your browser does not support the video tag.