title: Distribution of arsenic and other metals in crayfish tissues (Procambarus clarkii) under different production practices.
abstract: Louisiana is one of the world's largest producer of crayfish. Arsenic (As) and other metals (Cd, Cu, Pb and Zn) concentrations were determined in crayfish tissues, plant and soil samples collected from Louisiana paddy rice fields, where crayfish/rice rotation farming is a common practice. The samples were collected from November 2013 to April 2014 from three different crayfish farming systems. Concentration of As in rice grain, rice straw, and native vegetation ranged between 0.33 and 0.41, 3.14-4.93, and 3.26-5.89mgkg-1, respectively. The highest As levels in the crayfish external and internal body parts were found in gill (4.04±1.70mgkg-1), followed by hepatopancreas (3.42±1.57mgkg-1), exoskeleton (1.52±0.85mgkg-1), and muscle (1.50±0.69mgkg-1). Positive correlations between As levels in the crayfish muscle and the plant tissue on which they feed were found in all farming systems (r=0.405-0.438). The biomagnification factor (BMF) of As in different tissues varied between 0.29 and 1.08, having gill and hepatopancreas were the highest As accumulation while the lowest biomagnification was observed in crayfish muscle tissues which is a food source for human. The As levels along with other metals in crayfish muscle tissue were in acceptable levels for human consumption under all crayfish/rice rotation practices. Further studies are needed in determining the percentage of organic and inorganic arsenic in crayfish tissue.
authors.affiliation: College of the Coast and Environment, Wetland Biogeochemistry, Department of Oceanography and Coastal Sciences, Louisiana State University, Baton Rouge, LA, USA; Recep Tayyip Erdoğan University, Faculty of Fisheries, 53100 Rize, Turkey.
authors.forename: Kenan
authors.initials: K
authors.lastname: Gedik
authors.affiliation: H. Rouse Caffey Rice Research Station, Louisiana State University Agricultural Center, Rayne, LA, USA. Electronic address: mkongchum@agcenter.lsu.edu.
authors.forename: Manoch
authors.initials: M
authors.lastname: Kongchum
authors.affiliation: College of the Coast and Environment, Wetland Biogeochemistry, Department of Oceanography and Coastal Sciences, Louisiana State University, Baton Rouge, LA, USA.
authors.forename: Ronald D
authors.initials: RD
authors.lastname: DeLaune
authors.affiliation: H. Rouse Caffey Rice Research Station, Louisiana State University Agricultural Center, Rayne, LA, USA.
authors.forename: John J
authors.initials: JJ
authors.lastname: Sonnier
mesh_terms: D000818:Animals; D001151:Arsenic / Q000378:metabolism*; D003400:Astacoidea / Q000378:metabolism*; D002104:Cadmium; D004784:Environmental Monitoring; D008145:Louisiana; D019216:Metals, Heavy / Q000378:metabolism*; D012275:Oryza; D014018:Tissue Distribution
chemical_list: D019216:Metals, Heavy; D002104:Cadmium; D001151:Arsenic
keywords: Aquaculture; Arsenic; Crayfish; Rice