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The effect of particle size frequency distribution of the substratum on the burrowing ability of chiridota rigida echinodermata holothuroidea

, : The effect of particle size frequency distribution of the substratum on the burrowing ability of chiridota rigida echinodermata holothuroidea. Marine Behaviour and Physiology 4(4): 305-312

C. rigida (Semper) burrows easily into well-sorted substrata, moving between particles in coarse substrata and pushing aside particles in fine substrata. C. rigida does not burrow easily into poorly sorted substrata because spaces which can be penetrated are not available and because the particles cannot be moved as a result of increased stability of the substratum. In poorly sorted substrata, burrowing ability increases with increases in the proportion of fine particles. It would appear that the distribution and abundance of C. rigida and other chiridotids would be affected by the effect of the substratum on their ability to burrow.


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