Change in translucency of squid [Todarodes pacificus] mantle muscle upon storage
2003
Yoshioka, T. (Hokkaido. Industrial Technology Center, Hakodate (Japan)) | Kinoshita, Y. | Yoshino, H. | Park, S. | Konno, K. | Seki, N.
ABSTRACT: Change in the translucency of squid mantle muscle during its storage at 0 deg C was studied by monitoring L sup* value and turbidity. Two indicators showed that squid mantle muscle lost its translucency and reached maximal turbidity within 24 h of storage. Thickness of mantle muscle also increased by 15% in 12 h, earlier than the loss of translucency. ATP content decreased with storage time and was completely lost in almost 24 h, a similar period to translucency loss, but later than rigor contraction. Development of black color on skin surface by chromatophores was fully achieved in 24 h. It was thus concluded that ATP content was well correlated with a loss of translucency or increase in the turbidity of mantle muscle and development of dark color on the surface skin of mantle.
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