The effect of sea cucumber Holothuria Tubulosa G. 1788 on nutrient and organic matter contents of bottom sediment of oligotrophic and hypereutrophic shores

Two sets of hypereutrophic and oligotrophic aquariums with and related controls without sea cucumbers were designed in order to test their effects on water quality and sediments. Water and sediment samples were daily analyzed, with respect to nitrogenous materials and organic carbon. The differences between the initial and final concentrations of organic matter, ammonium, nitrate, nitrite and phosphate were significant at the end of experiments. Observing the effects of H. tubulosa on the water quality of both environments at the 30 super(th) day when the organic material was low for sea cucumbers and black sediment turned into white-coloured one completely, it was concluded that sea cucumbers might be successfully used for the improvement of coastal regions, especially in the areas with fish-farming.