Article (Scientific journals)
The invasive crayfish Cherax quadricarinatus facing chlordecone in Martinique: Bioaccumulation and depuration study
Baudry, Thomas; Gismondi, Eric; Goût, Jean-Pierre et al.
2022In Chemosphere, 286, p. 131926
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Abstract :
[en] The redclaw crayfish, Cherax quadricarinatus, was introduced to Martinique Island for aquaculture purposes at the beginning of the 21st century, in an attempt to revitalize the freshwater crustacean aquaculture sector. Mainly due to its high economical value, it was intentionally released in the wild and was caught and sold by fishermen. Martinican rivers are polluted by chlordecone, considered as one of the worst Persistant Organic Pollutants (POP). Despite its dangerousness, it was used until 1993 in the French West Indies against a banana pest and was always found in the ecosystems. This study aimed to investigate the level of contamination in the muscle of crayfish caught in the wild, as well as the potential of bioconcentration and depuration in the C. quadricarinatus muscle. This study could allow us to quantify the risk for consumers but also, to evaluate a depuration process to reduce the risk related to its consumption. Using both in-vitro and in-situ experiments, results highlighted the importance of the chlordecone concentration in the water and the time of exposure to the pollutant. The bioconcentration seems to be very quick and continuous in crayfish muscle, as chlordecone can be detectable as early as 6 h of exposure, whatever the concentration tested. Finally, it appears that, even after 20 days of depuration in chlordecone-free water, chlordecone concentrations remained higher to the residual maximum limit (i.e. 20 ng/g wet weight), concluding that the decontamination of the muscle seems not very efficient, and the risk for the Martinican people could be serious.
Research center :
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
Disciplines :
Environmental sciences & ecology
Author, co-author :
Baudry, Thomas
Gismondi, Eric ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Ecologie animale et écotoxicologie
Goût, Jean-Pierre
Arqué, Alexandre
Smith-Ravin, Juliette
Grandjean, Frédéric
Language :
English
Title :
The invasive crayfish Cherax quadricarinatus facing chlordecone in Martinique: Bioaccumulation and depuration study
Publication date :
January 2022
Journal title :
Chemosphere
ISSN :
0045-6535
eISSN :
1879-1298
Publisher :
Elsevier, Oxford, United Kingdom
Volume :
286
Pages :
131926
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 01 September 2021

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