The behavioural and physiological response of Atlantic cod Gadus morhua L. to short-term acute hypoxia.

摘要

The average rate of swimming speed and the physiological status or stress of individual Atlantic cod Gadus morhua was monitored in response to short-term acute (STA) hypoxia (i.e. partial pressure of oxygen, PO2, reduced from 20.9 to 4.3 kPa within 1 h at 10 degrees C). The STA hypoxic response of Atlantic cod was associated with a large primary increase (+29%) and a large secondary decrease (-54%) in swimming speed as well as major physiological stress (e.g. plasma cortisol=214.7 ng ml-1 and blood lactate=2.41 mmol l-1)..