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Freshwater Crayfish 21(1): 83-93 (2015)

PEER REVIEWED    RESEARCH ARTICLE

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Associated habitat and population characteristics of the Hiwassee headwater crayfish, Cambarus parrishi, in north Georgia

Davis JG, Cash K, Henry B and Weaver S  e-mail link

Published Online: 12/31/2015

Abstract

Cambarus parrishi is a rare, stream-dwelling crayfish endemic to the upper Hiwassee River watershed in northeastern Georgia and western North Carolina. A two year survey of C. parrishi at 22 sites across 4 streams was conducted to identify microhabitat associations and population characteristics, and represents the most comprehensive study of this species within Georgia. Field sampling expanded the range of C. parrishi to four separate streams in Georgia and resulted in the capture of 141 individuals. Generalized linear modeling of C. parrishi density demonstrated strong associations near stream banks with rough substrates composed of abundant cobbles and small boulders. Cambarus parrishi were reproductively active from September through October and reached sexual maturity earlier than indicated by historical data. Five possible age classes were defined with an unbalanced 1.7:1 (females:males) sex ratio. Cambarus parrishi exists mostly on federally-managed lands at high elevations. However, development activities that introduce fine substrates and eliminate heterogeneous habitats preferred by most stream-dwelling crayfishes could threaten this species. Although this study increased knowledge of the range of C. parrishi, additional data on population, habitat use, life history, and occurrences in other tributaries within the watershed are still needed.

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How to Cite

Davis JG, Cash K, Henry B and Weaver S. (2015). Associated habitat and population characteristics of the Hiwassee headwater crayfish, Cambarus parrishi, in north Georgia. Freshwater Crayfish 21(1):83-93. doi: 10.5869/fc.2015.v21-1.83

 

 

Author Information

Johnathan G. Davis,* Biology, Young Harris College, 1 College Street, Young Harris, Georgia, United States30582. E-mail: jgdavis@yhc.edu

Kaycee  Cash, Bio, Young Harris College, 1 College Street, Young Harris, Georgia, United States30582. E-mail: krcash@yhc.edu

Sydnee  Weaver, Biology, Young Harris College, 1 College Street, Young Harris, Georgia, United States30582. E-mail: jgdavis@yhc.edu

Brittany  Henry, Biology, Young Harris College, 1 College Street, Young Harris, Georgia, United States30582. E-mail: bnhenry@yhc.edu

Corresponding Author indicated by an *.

 

Publication History

   Manuscript Submitted: 6/8/2015

   Manuscript Accepted: 12/1/2015

   Published Online: 12/31/2015

   Published in Print: 12/31/2015

 

 

Funding Information

No specific funding statement is available for this article.

 

 



 

 

 

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