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Table 2.

Plasma adrenaline and noradrenaline concentrations,adrenaline:noradrenaline ratio and total catecholamine concentrations, in the winter flounder at rest, after 60 s of net stress, after 90 s of chasing, and after an injection of catecholamines

A (nmol l–1)NA (nmol l–1)A:NATotal CA (nmol l–1)
Rest 4.6±0.7a 5.2±1.0a 1.1±0.3a 9.8±1.1a 
Net stress 15.0±7.0b 11.6±3.4b 1.3±0.4a,b 26.6±9.5b 
Chasing 20.7±5.1b 14.0±5.0b 2.0±0.4b 34.6±8.4b 
Dose 5 11.5±2.3b 13.7±3.6b 1.0±0.1a 25.2±5.8b 
A (nmol l–1)NA (nmol l–1)A:NATotal CA (nmol l–1)
Rest 4.6±0.7a 5.2±1.0a 1.1±0.3a 9.8±1.1a 
Net stress 15.0±7.0b 11.6±3.4b 1.3±0.4a,b 26.6±9.5b 
Chasing 20.7±5.1b 14.0±5.0b 2.0±0.4b 34.6±8.4b 
Dose 5 11.5±2.3b 13.7±3.6b 1.0±0.1a 25.2±5.8b 

A, adrenaline; NA, noradrenaline; A:NA, adrenaline:noradrenaline ratio; CA,total catecholamines (dose 5: 0.4 μg kg–1 of A and 0.2μg kg–1 of NA). Values are presented as means ±s.e.m. Different superscript letters indicate a significant difference(P<0.05) between treatments

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