[Growth and oxygenium-consum of the larvae of Hyderma bovis (De Geer) (Diptera, Hypodermatidae)]

At the end of their migration larvae of Hypoderma bovis have reached about 42% of their final length, but only 10% of their final body-weight. Oxygenium-consum/mg body-weight decreased during the larval development: a larva of 50 mg weight needs 800 mm³/mg·h, one of 1500 mg weight only 100 mm³/mg·h. Third instar larvae have a much higher oxygenium-consum after moulting than second instar larvae have just before. The relation of oxygenium-consum/body-weight differs in the two larval stages. Respiration depends on the temperature, its maximum is between 32°C and 37°C. Young animals have a higher maximum than old ones.