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Branchial morphological and endocrine responses of rainbow trout (Oncorhynchus mykiss) to a long-term sublethal acid exposure in which acclimation did not occur



Branchial morphological and endocrine responses of rainbow trout (Oncorhynchus mykiss) to a long-term sublethal acid exposure in which acclimation did not occur



Canadian Journal of Fisheries and Aquatic Sciences 50(1): 198-209



Changes in branchial morphology and in plasma cortisol, adrenaline, and noradrenaline were quantified throughout an 81-d exposure of rainbow trout (Oncorhynchus mykiss) to sublethal acidity (pH 4.8) in artificial soft water and after a 5-h acid challenge (pH 4.0) of naive fish and 81 -d acid-preexposed fish. Changes in branchial morphology at pH 4.8 were generally very mild and characterized by slight increases in filamental mucous cells and decreases in lamellar mucous cells.

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Accession: 008244122

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DOI: 10.1139/f93-022


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