title: Effects of hydrostatic pressure per se (101 ATA) on energetic processes in fish.
abstract: Nucleotides concentrations (ATP, ADP, AMP) have been measured in brain and muscle of eels exposed to 101 ATA of hydrostatic pressure (HP) for 3 hr. Survival times (ST) and oxygen arterial content (CaO2) have been measured in trouts exposed to HP = 101 ATA. The results show that at HP = 101 ATA, AMP increases (P less than 0.05) and ATP decreases (-12%; NS) in muscle but are not modified in brain; ST values are similar in normoxic and hyperoxic conditions, and CaO2 are similar at 1 ATA and 101 ATA of HP. It is concluded that HP tends to decrease aerobic production of energy. This phenomenon is not due to a failure in O2 transport from ambient medium to the cell but to a possible perturbation of the aerobic cellular processes leading to energy production (Krebs cycle and/or respiratory chain coupled to oxidative phosphorylation.
mesh_terms: D000227:Adenine Nucleotides / Q000378:metabolism; D000818:Animals; D001921:Brain / Q000378:metabolism; D004524:Eels / Q000378:metabolism*; D004734:Energy Metabolism; D005880:Gills / Q000378:metabolism; D006874:Hydrostatic Pressure; D009132:Muscles / Q000378:metabolism; D010101:Oxygen Consumption; D012487:Salmonidae / Q000378:metabolism*; D014337:Trout / Q000378:metabolism*
chemical_list: D000227:Adenine Nucleotides