Abstract
Two shrimp surveys have been made in the Tokar Delta region of the Sudanese Red Sea. Sediment samples from the areas covered by these surveys have been analysed to give particle size distributions, organic carbon content, CaCo3 content and visual estimates of composition. The abundance of shrimp was found to increase with increasing fineness of sediment (correlation coefficient 0·92) and with increasing organic carbon content (correlation coefficient 0·73). No significant relationships were found between organic carbon content, CaCO3 content, particle size distribution and visual estimates of the composition of sediments. Penaeus semisulcatus, P. latisulcatus and Metapenaeus monoceros are the dominant species and the abundance of each varies with different particle size distributions.
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