Brain monoamine concentrations as predictors of growth inhibition in channel catfish exposed to ammonia

Heidi L. Atwood, Joseph R. Tomasso, Patrick J. Ronan, Bruce A. Barton, Kenneth J. Renner

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

Fingerlings of channel catfish Ictalurus punctatus exhibited a significant exposure-dependent decrease in growth (measured by weight gain and increase in total length) and condition factor after 9 weeks of exposure to environmental ammonia. Concentrations of 5-hydroxytryptamine (5- HT) and dopamine in the brain decreased significantly whereas the ratio of 5-hydroxyindoleacetic acid (5-HIAA) to 5-HT increased significantly in exposure-dependent manners. The brain dopamine concentrations and the 5-HIAA;5-HT ratio collectively explained 88% of the variation in growth due to ammonia exposure. This study demonstrates the potential to predict ammonia-induced inhibition of growth in channel catfish with physiological changes.

Original languageEnglish (US)
Pages (from-to)69-73
Number of pages5
JournalJournal of Aquatic Animal Health
Volume12
Issue number1
DOIs
StatePublished - 2000

ASJC Scopus subject areas

  • Aquatic Science

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