Effects of temperature and humidity on transpiration in adults of the lesser mealworm, Alphitobius diaperinus (Coleoptera: Tenebrionidae).

摘要: Measurements of water loss were made on adults the lesser mealworm, Alphitobius diaperinus, using a recording micro-electrobalance and programmable heat circulator bath. This species originates in tropical regions infests poultry houses temperate countries. Two routes examined: general cuticle via spiracles. Temperature relative humidity ambient air substantially affect cuticular transpiration (fresh body weights from 12 mg to 22 mg). At near 0% R.H., between 20 40 degrees C rate gradually increased; other hand, insects gained weight an atmosphere close saturation. Above flow abruptly increased coinciding with start vigorous locomotor activity. critical point corresponds opening spiracles which is expelled tracheal system.In dead specimens, killed by cyanide or solvent, vapour slowly diffused out and, as atracheate insects, curves did not show peak temperature was increased.The thermostupor (TSP) occurred became motionless; corresponding significantly affected atmospheric (TSP=47.4+/-0.6 at c. R.H.; TSP=46.6+/-0.7 100% R.H.).The about four times fast specimens treated solvent individuals (live cyanide-killed) that had undamaged water-proof cuticle. has cope double challenge: (i) adapt its physiology ecology poultry-house conditions constitutes extension primary habitats, (ii) survive over winter; high drought resistance tolerance may constitute pre-adaptation conquer anthropogenic air-conditioned sites.