![]() ![]() An integrated approach of flow cytometry, osmolality and metabolomics, along with behavioural assessments was used. In this study, the physiological responses of juvenile geoducks following emersion (3- and 8-h), and recovery (1- and 5-days) were investigated. Stress accumulated during transport of juveniles to grow-out sites represent a bottleneck in the aquaculture process. The New Zealand geoduck clam is a unique seafood delicacy, with animals selling for up to $US 220–330/kg. Overall, the composition and textural differences recorded are commensurate with differences in anatomic functions of the siphon and the mantle in live geoduck clams. After freezing, hardness values for the mantle significantly increased, and this finding is in line with Southeast Alaska geoduck processor observations. ![]() There were also textural differences in hardness and shear energy, with the siphon presenting significantly higher values than the mantle. Large differences were observed in the electrophoretic profiles of the contractile siphon, which had a greater abundance of higher molecular weight proteins than the mantle. Protein content was similar between tissues, but soluble protein content in the siphon was significantly higher than in the mantle. The mantle had significantly higher contents of carbohydrates and lipids, whereas the siphon had a higher moisture content. The mantle significantly differed in composition and texture from the siphon. Live geoducks were processed using standard industry practices and analyzed either fresh or after 90 days of frozen storage. ![]() The objectives of this study were to determine chemical composition of the siphon and the mantle of commercial-size geoducks clams harvested in Southeast Alaska, and to measure textural differences between the two muscle tissues, comparing them with their frozen counterparts. ![]()
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