Abstract
Physical and tensile properties of Loligo and Illex squid mantles were evaluated during refrigerated storage and after various heat treatments. A major decrease in ultimate tensile strength of the mantle occurred between 50° and 60°C in a direction parallel to the longitudinal axis of the mantle. After storage for more than 4 days at 4°C, the ultimate tensile strength of the mantle decreased significantly in the longitudinal but not the transverse direction. In addition, heating of mantle (100°C for 2 min) stored for more than 4 days led to greater strength loss than observed in heated, nonstored mantle, indicating that refrigerated storage produces changes in collagen that make it more susceptible to the effects of high temperature. Strength loss in the transverse direction after heating was observed in mantle of Loligo but not Illex.
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