MINERALS AND XENOBIOTIC RESIDUES IN THE EDIBLE TISSUES OF WILD AND POND‐RAISED LOUISIANA CRAYFISH¹

Abstract

The popularity of Cajun cuisine has promoted the consumption of Louisiana crayfish, Procambarus clarkii. Tail meat and hepatopancreatic tissues of crayfish captured from two locations in the Atchafalaya River Basin and four open ponds were analyzed separately for xenobiotic metal and mineral composition using an inductively coupled plasma emission spectrometer (ICP) and chlorinated hydrocarbons by gas chromatograph (GC) with electron capture detector. Less than 3 mg/kg of toxic xenobiotic metals were found in the tail meats and less than 5 mg/kg in the hepatopancreatic tissues. Mineral concentrations were similar to those reported for other crustacean species. Occasional trace amounts of DDD and DDE were found present in tissue samples.

Trace element concentrations in red swamp crayfish (Procambarus clarkii) and surface sediments in Lake Preola and Gorghi Tondi natural reserve, SW Sicily

“…2 and Table 7, relatively high trace element concentrations were found in P. clarkii tissues after comparison with threshold concentrations for human consumption and trace element concentrations found previously in crayfish from other freshwater systems. Specifically, the concentrations of Zn fall well within the range of concentrations found by previous authors in highly industrialized areas, although they were higher than concentrations found by Sánchez-López et al (2004) in a mining spill area and by Madden et al (1991) in an unpolluted area. Copper concentrations in muscle tissues seem comparable with concentration levels reported from other studies, but the great variability in the few data on Cu concentrations in hepatopancreas tissues make even a tentative comparison difficult.…”

“…Despite the low Ni concentrations found in the sediment samples, Ni concentrations found in muscle tissues fall within the range of concentrations found by previous authors in heavily polluted waters (Table 7). Moreover, concentrations found in hepatopancreas tissues were higher than those found by Finerty et al (1990) in a heavy industrialized area and by Madden et al (1991) in an unpolluted area. Due to the absence of standard toxicity values for Ni concentrations in crustacean muscles, it is difficult to establish if the concentrations found here could be considered harmful.…”

Bioaccumulation and Effects of Heavy Metals in Crayfish: A Review

“…It is a component of the respiratory metalloprotein-hemocyanin in crustaceans (White and Rainbow 1982;Rainbow 2002); hence, relatively high copper levels are found in tissues of crayfish, especially in hepatopancreas (Bagatto and Alikhan 1987a;Madden et al 1991;Bruno et al 2006).…”

Accumulation of Copper, Lead, Chrome, Cadmium in Some Tissues of <i>Procambarus clarkii</i> in Rharb Region in Morocco

“…The least affected tissues were abdominal muscles [27]. Cadmium levels in abdominal muscles and hepatopancreas in Procambarus clarkii were in Spain from an unpolluted locality (0.02 μg/g dry weight) in abdominal muscles [28], in USA from an unpolluted locality (0.73 -0.33 μg/g) in abdominal muscles and (0.30 -0.26 µg/g dry weight) in hepatopancreas [29] And (0.0005 µg/g dry weight) in abdominal muscles [30] and (0.1 µg/g dry weight) in hepatopancreas [30] and (0.03 µg/g dry weight) in abdominal muscles [30], in Egypt (1.97 µg/g wet weight) in abdominal muscles [31].…”

“…The metal was accumulated primarily in the hepatopancreas, carapace, and gills and reached only low concentrations in the hindgut and muscle [1]. Mean lead concentrations in abdominal muscle and hepatopancreas of crayfish expressed as mg/kg dry tissue weight respectively were in USA (<5.0 mg/kg, <5.0 mg/kg) [29], (0.06 and 0.04 mg/kg) from an unpolluted locality, (<0.19 mg/kg wet weight) in abdominal Muscle [30] and in Egypt (15.93 mg/kg wet weight) in abdominal muscle [31].…”