Cadmium content in fresh and canned squid (Loligo opalescens) from the Pacific coastal waters of California (USA).
Cadmium (Cd) levels were determined in 70 samples of mantle tissue and 70 whole individual squid (Loligo opalescens; commercially known as California squid). Samples were collected from the coastal zones of California (USA) during the period 2007/2008. To further investigate consumer exposure to processed fishery products, cadmium concentration was also determined in 200 canned samples of squid. Cd concentrations in raw mantle were low, between 0.01 and 0.29 mg kg(-1) and below the tolerance limit of current regulations (1 mg kg(-1)). Respective concentrations in whole individuals were significantly higher, ranging from 0.51 to 1.18 mg kg(-1), attributed to the presence of the visceral portion in whole squid samples. Cd concentrations varied in relation to age and sex of squid, indicating that several physiological factors may influence accumulation. Furthermore, canning of squid substantially enhanced Cd levels. Cd concentration ranged 0.17-0.67 mg kg(-1) in canned mantle tissue and 0.86-2.07 mg kg(-1) in canned whole squid samples, due to both concentration after canning and movement of the metal between different tissues. Several biological compounds, including metallothioneins, nucleic acids and enzymes, may affect Cd concentrations in commercial fishery products.
a Northern Aegean Canneries, Kilkis Industrial Area , 61100 Kilkis , Greece.
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A
Galitsopoulou
D
D
Georgantelis
M G
MG
Kontominas
D000818:Animals; D002104:Cadmium / Q000032:analysis* / Q000633:toxicity; D002140:California; D049832:Decapodiformes / Q000737:chemistry*; D005260:Female; D005398:Fisheries; D005506:Food Contamination / Q000032:analysis*; D005511:Food Handling; D006801:Humans; D008297:Male; D008452:Maximum Allowable Concentration; D010140:Pacific Ocean; D012758:Shellfish / Q000032:analysis* / Q000633:toxicity; D014018:Tissue Distribution
D002104:Cadmium
cadmium; canning; cephalopods; graphite furnace atomic absorption spectrometry