Incidence of marine wood-borers in mangroves in the vicinity of Panaji Coast, Goa

L.N. Santhakumaran

Abstract



A preliminary survey of the mangroves along the Mandovi-Zuari estuaries was conducted with a view to studying the incidence of marine woodborers and the consequent destruction of the vegetation. The study revealed the presence of atleast ten species of molluscan and two species and one variety of crustacean borers in the living mangrove trees, mostly consisting of Avicennia officinalis L. and Rhizophora mucronata Lamk. as well as in dead stumps. The most destructive and dominant borers encountered were Dicyathifer manni, Nausitora hedleyi, Martesia sp. among molluscs and Sphaeroma terebrans and S. annandalei among crustaceans. Lyrodus massa and Martesia sp. have now been recorded for the first time from Indian waters. Similarly Nausitora hedleyi, Bankia carinata, Bactronophorus thoracites, S. annandalei and S. annandalei travancorensis have been reported for the first time from Goa Coast. The morphological differences of Martesia sp which is abundant in the living and dead mangrove trees, from other known species of the genus, have been briefly included. The importance of marine wood-borers in the destruction of mangroves has been high-lighted

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