• T Thangaraj

      Articles written in Proceedings – Animal Sciences

    • Effect of temperature on food intake, growth and conversion

      S Palanichamy R Ponnuchamy T Thangaraj

      More Details Abstract Fulltext PDF

      The effect of temperature on food intake, growth and conversion efficiency has been studied in the final instar male and female larvae cfEupterote mollifera. Food consumed, assimilated and metabolised decreased with increase in temperature. The larval duration decreased from 12 days for the group reared at 22° C to 5 days for the group reared at 37δ C. While the rates of feeding, assimilation and conversion increased with increase in temperature, high conversion efficiencies (K1 and K2) were observed for the larvae reared at 27 and 32° C.

    • Characteristics of phenoloxidases in larval cuticle of the coconut pest,Oryctes rhinoceros

      R Jeyaraj T Thangaraj C A Vasuki M Aruchami

      More Details Abstract Fulltext PDF

      Characteristics of cuticular phenoloxidases of the coconut pest,Oryctes rhinoceros were studied biochemically with respect to substrate specificity, pH optima, thermostability and the behaviour of the enzyme in the presence of various chemicals. Biochemical studies indicate that the larval cuticle contains tyrosinase (EC, 1·10·3·1 Ortho diphenol: O2 oxidoreductase), and laccase type of enzymes (EC, 1·10·3·2. Para diphenol: O2 oxidoreductase). These enzymes showed similarity to enzyme types A and C with respect to the enzyme activity in the larval cuticle ofCalliphora vicina. In the electrophoretic study two fractions are discernable in the gel which confirms the occurrence of two enzymes namely tyrosinase and laccase types.

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