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The proximate and mineral composition of the anatomical parts of adult male and female Sudananautes africanus africanus (common West African fresh water crab) were determined. The mineral composition of the ambient water was also determined. The lifeweights of the males varied between 92.18 and 140.36 g and the values ranged between 56.95 and 102.61 g in the females. The cheliped muscle recorded the highest value for protein and the lowest value for the total ash in both sexes, correlation coefficients (rMF) were positively related and high for protein (0.99), crude fat (0.84), total ash (0.99) and fibre (0.99) but negatively related in carbohydrate (-0.49) between the two sexes. The following minerals were highly concentrated in both sexes: Ca, Mg, Zn, Ni, P, Fe, Cu, Na and K with significant differences occurring in Ca, Mg, Zn, Ni, P, Fe, Cu and K at alpha < 0.05. Bioconcentration factors were found to be particularly high in the trace heavy metals: Co, Ni and Cu. All the various parts studied were found to be very good sources of the minerals examined with the exception of Co.

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Abstract. This paper reports on amino acid profiles of the flesh of heterosexuals of porcellanids collected from the Atlantic Ocean at Orimedu beach in Ibeju-Lekki, Lagos, Nigeria. Results showed that high values of amino acids were observed in the heterosexual flesh of Neopetrolisthes maculatus (g 100g -1 protein): 17.7 -17.8 (Glu), 9.90 -10.0 (Asp), 8.70 -9.07 (Arg), 7.23 -7.94 (Leu) and 5.81 -6.06 (Gly). Total essential amino acid values ranged from 45.2 to 46.2 g 100 -1 g. Predicted protein efficiency ratio was 3.82 -4.14, the range of essential amino acid index was 86.9 -89.9, the biological values ranged from 83.0 to 86.3. The Lys/Trp was 3.31-4.27. Serine was limiting amino acid (0.513 -0.516) in the egg score comparison; under the essential amino acids scores, Lys (0.840) was limiting in female but Val (0.823) was limiting in the male; Lys (0.796 -0.905) was limiting in both samples in the pre-school child amino acid requirements. It was observed that out of the twenty parameters determined, male flesh was more concentrated in 60% values than the female flesh and 40% better in female than male. Correlation coefficient result showed that significant differences existed in the amino acids composition at r = 0.01 of the N. maculatus samples.