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: Cultured Siberian sturgeon (Acipenser baeri), Adriatic sturgeon (Acipenser naccarii) and white sturgeon (Acipenser transmontanus) of market size were examined for condition factor, eviscerated and dressed yields, white Ñesh yield, viscera-, hepato-somatic-and gonado-somatic indices. Muscle pH, chemical composition, cholesterol content and fatty acid proÐle of Ñesh were also determined. SigniÐcant di †erences were noted between species in eviscerated yield and white Ñesh yield (lowest in A naccarii, highest in A transmontanus), viscera index and gonado-somatic index (lowest in A transmontanus), but not in dressed yield. Muscle lipid content was 77É6, 106É4 and 44É9 g kg~1 wet weight in A baeri, A naccarii and A transmontanus, respectively. Acipenser baeri had the lowest saturated and the highest polyunsaturated fatty acid content, especially of the u-3 series (as % total fatty acid methyl esters). Given the di †erences that emerged under uniform feeding regimen and environmental conditions, it would be reasonable to market the three species under their proper names, rather than under the generic term of "sturgeonÏ as is presently done in Italy.

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