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The article discusses a study on the exposure of white shrimp Litopenaeus vannamei juveniles to Cu2+ concentrations for 25 days. It cites the use of Cu2+ concentrations in Mexican shrimp farms to assess the possible histological effects on shrimp. The sampling procesures and acclimation of seas-water grown Litopenaeus vannamei juveniles are discussed. The study showed the absence of mortalities in controls and treatments and the lack of histological alterations in the shrimps' midgut, gills and hepatopancreas.

This article presents a study which evaluated the cadmium (Cd), copper (Cu), lead (Pb) and zinc (Zn) contents of the white shrimp Litopenaeus vanamei from commercial landings from six lagoons of Sinaloa in Mexico and determined possible health risks for consumers. The organisms were dissected and the abdominal muscles and hepatopancreas were separated, freeze-dried, ground and homogenized in a Teflon mortar, giving three composite samples of each tissue for each lagoon. Study results reveal that the mean contents of all metals are lower in the muscle than in the corresponding hepatopancreas samples.

The article focuses on a study which evaluated the mean content of cadmium, copper, lead and zinc in the hepatopancreas of the white shrimp, Litopenaeus vannamei, from commercial landings from six lagoons of Sinaloa, northwestern Mexico. Shrimp samples were obtained from local fishermen operating in different areas of each lagoon between September and October 2006. It was found that the mean contents of all metals were lower in the muscle than in the corresponding hepatopancreas samples. No significant correlations were seen between the metal contents of the two tissues. This lack of correlation may be linked to different stages of the kinetic mechanisms associated to metal uptake, transport, storage and release.