Density of Boring Marine Bivalves in Pieces of Wood Inside and Outside Pelabuhan Ratu Harbour, West Java, Indonesia

Abstract

Six species of boring marine bivalves, Teredo navalis Spengler, Teredo stutchburyi "Leach" de Blainville, Bankia syriaca Roch, Bankia minima de Blainville, Bankia zeteki Bartsch and Martesia striata Linne, were found in wood pieces soaked in sea water for three months. The average density of boring organisms in four kinds of wood was higher in the harbour (232 individuals 150 cm at the power of-2), than outside it (144 individuals 150 cm at the power of - 2). The same tendency is shown by attack intensity. The level is higher on wood soaked in the harbour than outside it. Most of the boring organisms prefer wood of Indonesian merbau (Intsia bijuga) and red mirabow (Shorea leprosula) to balau (Shorea eliptica) and Indonesian keruing (Dipterocarpus confertus).