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Studies on the inorganic constituents of the inter molt cuticle of the crab sudanonautes africanus



Studies on the inorganic constituents of the inter molt cuticle of the crab sudanonautes africanus



Revue de Zoologie Africaine 93(1): 36-52



Levels of Ash, Ca, Mg, Na and K in the intermolt cuticles of the crab S. africanus are presented. Over the ages 2-5 yr there are no significant changes in ash, Ca and Mg in the intermolt carapace integument. Higher ash levels occur during the 2 rainy quarters, April-June and July-Sept. than in the dry quarters Jan.-March and Oct.-Dec. Lower levels of Ca occur in July-Dec. than in Jan.-March and April-July; Mg content shows no significant variation. There were significantly more ash and Mg in the mineralized carapace than in the phenol-tanned dactylus but the latter contains relatively more Ca in ash than the former. A progressive increase in Ca and a decrease in Mg in the exuviae of juveniles of S. africanus are shown with increase in age.

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Accession: 006517922

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