Abstract
ABSTRACT The variation in the nutritional composition of hard and soft shell blue swimming crabs was examined. The protein content varied significantly in hard (13.64%) and soft shell BSC (9.34%). Sarcoplasmic proteins ranged from 43–45%, myofibrillar 25–30%, alkali soluble 24–25%, and acid soluble protein 2–6%. Magnesium and calcium were the major and iron and zinc were minor minerals. Hard shell crabs had more zinc (2.35 mg/100 g), while soft shell crabs contained more iron (1.98 mg/100 g). Saturated fatty acids, monounsaturated fatty acids, and polyunsaturated acids were 53.89%, 25.56%, and 9.72%, respectively, in hard shell crabs. In soft shell crabs, methionine was the major essential amino acid (8.49 mg/100 mg), while leucine was the major amino acid in hard shell crabs (8.72 mg/100 mg). The hard crabs contain more proteins, amino acids and fatty acids whereas soft crabs are rich in minerals and have similar protein fractions.
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