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The behavioural and physiological response of Atlantic cod Gadus morhua L. to short‐term acute hypoxia
Author(s) -
Johansen J. L.,
Herbert N. A.,
Steffensen J. F.
Publication year - 2006
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.2006.01080.x
Subject(s) - gadus , atlantic cod , biology , hypoxia (environmental) , physiological stress , fishery , fight or flight response , zoology , medicine , oxygen , physiology , biochemistry , fish <actinopterygii> , chemistry , organic chemistry , gene
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 ).