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Two commercially important species of Louisiana crayfish, Procambarus clarkii (Girard) and P. acutus acutus (Girard), from the Atchafalaya River Basin, from open ponds and from the sediment and water of these environs were sampled three times during two consecutive fishing (production) seasons. The abdominal muscle and hepatopancreatic tissue were analyzed separately. Lead, mercury, and cadmium, if present, were in concentrations below the detection limit. In the hepatopancreatic tissue, barium was present in concentrations below 8 mg/kg, copper 11-15 mg/kg, and iron below 640 mg/kg. Abdominal muscle samples had less than 3 mg/kg of most metals. Locations with the highest levels of metal residues in sediment were not necessarily locations where crayfish had the highest levels in their tissues.

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.

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The feasibility of thermally processing fresh and frozen mullet was investigated. The average time to reach a 12D process at 121°C (15 psi) was 54 min. Various pre-can tripolyphosphate treatments were used to improve final product quality. Most changes in Hunter color difference values due to treatment or to storage period were insignificant. Pretreatment with sodium trioolvohosohate (0.07-0.19% P,Oc). <. . \ --, significantly improved texture (p