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The influence of temperature and anaemia on the adrenergic and cholinergic mechanisms controlling heart rate in the rainbow trout

, : The influence of temperature and anaemia on the adrenergic and cholinergic mechanisms controlling heart rate in the rainbow trout. Canadian Journal of Zoology 57(12): 2440-2447

Trout were fitted with chronic dorsal aortic catheters for heart rate and blood pressure measurements. At 5, 12, and 20 deg C, muscarinic cholinergic blockade with atropine caused substantial tachycardia, indicating the presence of cholinergic vagal tone in resting animals. The relative effect of atropine was greater at 5 deg C (+53% of resting heart rate) than at 12 and 20 deg C.


DOI: 10.1139/z79-316

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