Abstract
The nutritional composition of muscles from three farmed pufferfish species, Fugu obscurus, Fugu flavidus and Fugu rubripes, was investigated. All three species had high crude protein contents ranging between 17.8g/100g and 18.9g/100g (with the highest for F. rubripes), and low crude fat contents, 0.73g/100g to 0.83g/100g for adults, and 0.21g/100g to 0.29g/100g for juveniles. Significant differences (P<0.05) in macroelement contents and no significant differences (P>0.05) in microelement contents were found among the three species. It was found that K was the most abundant macroelement, ranging from 287mg/100g to 402mg/100g, while Fe was the most abundant microelement, 1.52mg/100g to 2.11mg/100g. Total amino acid (TAA) contents of three species were between 51.7g/100g and 62.9g/100g dry weight. The ratios of total essential amino acids to TAA were between 0.43 and 0.50, and F. flavidus had the highest ratio. The ratios of total umami amino acids to TAA were between 0.36 and 0.45, with the highest for F. rubripes. In eight amino acid scores (AAS), six AAS of three adult pufferfish were close to 1.00, but two AAS of valine and sum of phenylalanine and tyrosine of juveniles were close to 1.00. This study shows that the three pufferfish species under investigation have high nutritional qualities and are good protein resources.
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