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Freshwater Crayfish 17(1): 183-186 (2010)

PEER REVIEWED    RESEARCH ARTICLE

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Seasonal migrations of introduced Orconectes limosus (Rafinesque) to a small tributary of a large river

Buřič M, Kouba A and Kozák P  e-mail link

Published Online: 12/31/2010

Abstract

A seasonal migration of introduced Orconectes limosus (Rafinesque) between a brook and reservoir was observed in a small tributary of a large reservoir in southwest Czech Republic that was identified as suitable habitat for indigenous crayfish. Sixteen capture events (between April 2007 and October 2008) and one radio-telemetry study (from October to November 2007) were conducted. A significant trend of downstream migration to the reservoir was found in autumn. Orconectes limosus showed the ability to move downstream rapidly (max. 139 m per day). Seasonal fluctuations in crayfish density were observed and suggested that the occurrence of crayfish in the brook goes through periodic changes. A lower water temperature in the brook throughout the year, and possible fish predation pressure in the reservoir, could contribute to this phenomenon. The occurrence of O. limosus in reservoirs of big rivers, its periodic migrations, as well as the threat of potential crayfish plague transmission, accentuate their serious threat to indigenous crayfish.

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How to Cite

Buřič M, Kouba A and Kozák P. (2010). Seasonal migrations of introduced Orconectes limosus (Rafinesque) to a small tributary of a large river. Freshwater Crayfish 17(1):183-186. doi: 10.5869/fc.2010.v17.183

 

 

Author Information

Buřič M, Kouba A and Kozák P

 

Publication History

   Manuscript Submitted: 10/20/2008

   Manuscript Accepted: 7/30/2009

   Published Online: 12/31/2010

   Published in Print: 12/31/2010

 

 

Funding Information

No specific funding statement is available for this article.

 

 



 

 

 

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