Abstract
1. 1.|Embryonic development of Kiefferulus barbitarsis lasted for 3, 2 and 1 day at 27, 32 and 35°C, respectively. 2. 2.|At all the tested temperatures, with advancing development, fat content of the embryo rapidly decreased, while the water content steadily increased. 3. 3.|The embryo expended energy on metabolism at the rate of 2.6, 4.3 and 9.0 J mg −1 day −1 at 27, 32 and 35°C. 4. 4.|About 73–87% of the energy expended was derived from the oxidation of fat, which in turn increased the water content of the embryo. 5. 5.|The generally accepted view that protein serves as the source of energy for the embryonic metabolism in aquatic eggs does not hold good for K. barbitarsis and other freshwater insects.
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