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Freshwater Crayfish 24(1): 23-32 (2019)

PEER REVIEWED    RESEARCH ARTICLE

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Flood pulse characteristics and physicochemical influences on harvested Procambarus clarkii and Procambarus zonangulus populations in the Atchafalaya River basin, Louisiana

Kong LM, Ballinger AR and Bonvillain CP  e-mail link

Published Online: 2/22/2019

Abstract

The majority of Louisiana’s wild crayfish landings are harvested from the Atchafalaya River Basin (ARB) during floodplain inundation from the annual flood pulse. Spatial and temporal heterogeneity in ARB physicochemical characteristics are associated with flood pulse characteristics and floodplain inundation, and extensive areas of the ARB experience environmental hypoxia (dissolved oxygen [DO] < 2.0 mg·L-1) for several weeks to months during the annual flood pulse. The purpose of this research was to evaluate the effects of flood pulse characteristics and physicochemistry on harvested crayfish populations at 14 sites in the ARB that were sampled biweekly during the 2016 and 2017 crayfish seasons. Despite dissimilar 2016 and 2017 flood pulse characteristics, red swamp crawfish Procambarus clarkii and southern white river crawfish P. zonangulus carapace length and CPUE were similar between sample years. Comparisons of P. clarkii populations among physicochemical location groupings indicated that DO concentration, particularly chronically hypoxic water, is the principal abiotic variable influencing P. clarkii population characteristics. Although not significant, normoxic locations produced larger crayfish and yielded higher CPUE values for the majority of both crayfish seasons. Furthermore, hemolymph protein concentrations in P. clarkii from normoxic areas were significantly and consistently higher than individuals from chronically hypoxic locations.

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How to Cite

Kong LM, Ballinger AR and Bonvillain CP. (2019). Flood pulse characteristics and physicochemical influences on harvested Procambarus clarkii and Procambarus zonangulus populations in the Atchafalaya River basin, Louisiana. Freshwater Crayfish 24(1):23-32. doi: 10.5869/fc.2019.v24-1.23

 

 

Author Information

Lauren M. Kong, Department of Biological Sciences, Nicholls State University, P.O. Box 2021, Thibodaux, LA, USA70310. E-mail: laurenkong1@gmail.com

Alexa R. Ballinger, Department of Biological Sciences, Nicholls State University, P.O. Box 2021, Thibodaux, LA, USA70310. E-mail: aballinger@its.nicholls.edu

Christopher P. Bonvillain,* Department of Biological Sciences, Nicholls State University, P.O. Box 2021, Thibodaux, LA, USA70310. E-mail: chris.bonvillain@nicholls.edu

Corresponding Author indicated by an *.

 

Publication History

   Manuscript Submitted: 9/27/2019

   Manuscript Accepted: 2/19/2019

   Published Online: 2/22/2019

   Published in Print: 2/28/2019

 

 

Funding Information

No specific funding statement is available for this article.

 

 



 

 

 

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