Behavioral Changes and Acute Toxicity to the Freshwater Shrimp Atyaephyra desmaresti Millet (Decapoda: Natantia) from Exposure to Acid Mine Drainage

摘要: Short-term 48 h laboratory bioassays with water from an acid mine drainage (AMD: pH 3.3, 4.4, 5.0, 5.5, 6.4, control) and arsenic containing reservoir were performed the freshwater shrimp Atyaephyra desmaresti Millet, validated in situ compared to acidified control (ACID). Behaviour, mortality time death monitored Multispecies Freshwater Biomonitor (MFB). The shrimps had equal 24 h-LC50s at 4 AMD ACID. However, after proved more toxic (48 h-LC50 5.2) than ACID 4.5). Stress behaviour consisted < or = 6.4 of a pH-dependent decrease activity, disappearance circadian rhythmicity, 4.4 clear increase ventilation. At 5.5 bioaccumulation metals was higher locomotion lower 5.0. In ACID, only became abated arythmic. Locomotion field laboratory, whereas ventilation laboratory. A. is valuable species be used short term behavioural Europe.