REHABILITATION AND MANAGEMENT OF CORAL REEFS IN SOUTHERN QUI NHON BAY (SOUTH VIETNAM)

Abstract

An extensive rehabilitation was practiced during 2002 - 2004 in southern
Qui Nhon bay of coastal Binh Dinh province where coral reefs had suffered serious degradation due to coral mining, destructive fishing and overfishing. The first experiment indicated that the nearshore reefs in the western part could not be rehabilitated due to environment change during rainy season with large discharge of sediment and freshwater. Transplanted hard corals adapted well in southern part of island Hon Ngang and Hon Nhan with the techniques that used dead coral substratum, concrete plates and revered tubs as the
attachments of corals. Survival rate of branch corals Acropora was quite high in dry season (85- 100%) but reduced during rainy