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

• Published in: Journal of Fish Biology
• Main Authors: Johansen, J. L., Herbert, N. A., Steffensen, J. F.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 2006
• Subjects: atlantic cod; Gadus morhua
• Online Access: http://dx.doi.org/10.1111/j.1095-8649.2006.01080.x; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.2006.01080.x; https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.2006.01080.x

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, , reduced from 20·9 to 4·3 kPa within 1 h at 10° 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 ).