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Abstract

PROXIMATE COMPOSITION OF THREE COMMERCIALLY IMPORTANT SPECIES OF A GENUS GRACILARIA FROM RAMESHWARAM COASTAL REGIONS, TAMIL NADU, INDIA

A. Nagaraj, Dr. K. Parvathi, M. Logeshwari, M. Atchaya, S. Ashwathaman, Dr. G. Subramanian*

ABSTRACT

The present study investigates the preliminary information of the proximate composition of three red algal seaweeds collected from Rameshwaram coastal regions, Tamil Nadu, India. The proximate composition (moisture, protein, total soluble carbohydrates, lipids, fiber and ash) of the marine red algal samples; Gracilaria corticata, Gracilaria edulis, and Gracilaria salicornia were analyzed. It was observed that the moisture content was high, ranging from 86.20% to 93.55%. High moisture content was found in G. corticata and minimum in G. salicornia. Carbohydrate content of seaweeds ranged from 25.95% to 37.55%. The maximum carbohydrate was recorded in G. edulis and minimum of carbohydrate was G. salicornia recorded. Quantitative analysis of protein content ranged from 7.88% to 14.25%. High protein was found in G. edulis and low in G. salicornia. The lipid content varied from 1.99% to 3.45%, high in G. salicornia and lower in G.corticata. Ash content was observed to range from 28.87% to 55.45%. The maximum ash content was recorded in G. corticata and G. salicornia recorded the minimum content. The fiber content ranged from 5.67% to 21.56%; high in red alga G. salicornia and lower in G. corticata. The moisture and ash contents were recorded higher in G. corticata than G. edulis and G. salicornia. The results of the present work indicates that, the seaweeds from Ramehwaram coastal regions an alternative nutritional source. Various environmental factors, as well as climatic changes, affect the seaweed composition; especially minerals present in Rameshwaram coastal regions are the major parameters for the ash content.

Keywords: Proximate composition, Seaweeds, Gracilaria, G. edulis, G. corticata, and G. salicornia, Rameshwaram.


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