Abstract
The results of the study on the distribution and environmental characteristics of Peanut Worms (Phascolosoma arcuatum, Gray 1828) in Can Gio mangrove forest show that: Peanut Worms live in the areas which have flood level < 1m, flood time < 30%, the topography from 0.8m to 1.7m and in the depth from 10 cm to 30 cm. They live in the soil from silty clay loam to clay which is quite porous, high humid, from acidic to neutral, organic-rich, heavy salty and less aluminous. The average density of the Peanut Worms is 7.44 individual/m2. Peanut Worms density in mixed mangrove forest is higher than that in planting Rhizophora apiculata forest and depends on the compartments. It is forecasted that the distribution area of Peanut Worms in Can Gio mangrove forest is about 24,323 ha and the caches of Peanut Worms are about from 285,600 kg to 535,500 kg/year.
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