Chemistry Commons^™

The Influence Of Dissolved Organic Matter (Dom) On Sodium Regulation And Nitrogenous Waste Excretion In The Zebrafish (Danio Rerio), Hassan A. Al-Reasi, Scott D. Smith, Chris M. Wood

Chemistry Faculty Publications

Dissolved organic matter (DOM) is both ubiquitous and diverse in composition in natural waters, but its effects on the branchial physiology of aquatic organisms have received little attention relative to other variables (e.g. pH, hardness, salinity, alkalinity). Here, we investigated the effects of four chemically distinct DOM isolates (three natural, one commercial, ranging from autochthonous to highly allochthonous, all at ∼6 mg C l⁻¹) on the physiology of gill ionoregulation and nitrogenous waste excretion in zebrafish acclimated to either circumneutral (7.0–8.0) or acidic pH (5.0). Overall, lower pH tended to increase net branchial ammonia excretion, net K^{+ …}