Abstract
Males and females of the Amphipod crustacean Orchestia gammarella (Talitridae) in period of sexual activity were isolated and compressed in an experimental hyperbaric chamber at pressures between 20 and 110 ATA with oxygen-helium (heliox) mixture (PIo2 = 300 torr). Stay duration under pressure was 16 days. This stay under pressure did not induce any important disorder like a high pressure nervous syndrome except excitement during compression between 70 and 110 ATA; phenomena of shedding of skin and reproduction did not change; rate of masculinity of the lineage was not modified. Slow decompression did not bring out bends. 110 ATA pressure with heliox mixture does not appear to induce obvious deterioration neither in cellular metabolism nor in physiological functions for instance, the intricate functions of reproduction.
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