Biodeterioration of cellulose materials in the Badagara and Korapuzha estuaries

N.B. Nair


The nature of destruction of cellulose materials in the Badagara and Korapuzha backwaters of the south-west coast of India has been examined in detail. The spatial incidence of the different species of boares was determined in relation to the salinity profile of the estuary. In the Badagara Estuary, Dicyathifer manni, Lyrodus pedicellatus, Teredo furcifera and Nausitora hedleyi were the shipworms; Martesia (Particoma) nairi, M. striata, represented the pholads, while Sphaeroma terebrans and S. annandalei were the isopod borers. Incidence of pholads (55%) was higher than that of shipworms (34%). The occurrence of sphaeromatids was low constituting only 10% of the total density of borers. In the Korapuzha Estuary N. hedleyi was replaced by Lyrodus massa. Shipworms constituted 28%, pholads 23%, while sphaeromatids (49%) dominated. The trend in distribution indicates noticeable differences in species dominance even in adjoining backwaters


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