Effect of elevated ammonia on tissue nitrogen metabolites in the ureotelic gulf toadfish (Opsanus beta) and the ammoniotelic midshipman (Porichthys notatus)

CM Veauvy, PJ Walsh… - Physiological and …, 2009 - journals.uchicago.edu
We investigated possible biochemical pathways explaining extreme ammonia tolerance by
the gulf toadfish and specifically tested the prediction that the gulf toadfish Opsanus beta is …

Isolated and combined exposure to ammonia and nitrite in rainbow trout (Oncorhynchus mykiss): effects on electrolyte status, blood respiratory properties and brain …

NE Vedel, B Korsgaard, FB Jensen - Aquatic Toxicology, 1998 - Elsevier
Rainbow trout (Oncorhynchus mykiss) were exposed for up to 4 days to 100, 300 and 500
μM ammonia and 0, 300 and 600 μM nitrite. Each ammonia concentration was combined …

Short-term physiological changes in turbot and seabream juveniles exposed to exogenous ammonia

JP Le Ruyet, G Boeuf, JZ Infante, S Helgason… - … and Physiology Part A …, 1998 - Elsevier
Seabream and turbot juveniles (40–520 g) were exposed to constant exogenous NH3-N
concentrations (1.27–4.27 mmol/l; pH, 8.15). In 96 hr acclimated fish, plasma TA-N (total …

Comparative acute ammonia toxicity in marine fish and plasma ammonia response

J Person-Le Ruyet, H Chartois, L Quemener - Aquaculture, 1995 - Elsevier
Using a continuous-flow method a total of 14 acute toxicity bioassays were conducted using
seabass (Dicentrarchus labrax), seabream (Spams aurata) and turbot (Scophthalmus …

Inhibition of glutamine synthetase during ammonia exposure in rainbow trout indicates a high reserve capacity to prevent brain ammonia toxicity

LA Sanderson, PA Wright… - Journal of …, 2010 - journals.biologists.com
Glutamine synthetase (GSase), the enzyme that catalyses the conversion of glutamate and
ammonia to glutamine, is present at high levels in vertebrate brain tissue and is thought to …

Five tropical air-breathing fishes, six different strategies to defend against ammonia toxicity on land

YK Ip, SF Chew, DJ Randall - … and Biochemical Zoology, 2004 - journals.uchicago.edu
Most tropical fishes are ammonotelic, producing ammonia and excreting it as NH3 by
diffusion across the branchial epithelia. Hence, those air-breathing tropical fishes that …

Plasma ammonia concentration in brown trout in soft acidic water and its relationship to decreased swimming performance

MW Beaumont, PJ Butler… - Journal of Experimental …, 1995 - journals.biologists.com
ABSTRACT Adult brown trout (300–600 g) were acclimated for 2 weeks to an artificial soft
water (Ca2+, 50 μ mol l− 1) and maintained at either 5° C (October to March) or 15° C (May …

Nitrogen excretion and defense against ammonia toxicity

SF Chew, JM Wilson, YK Ip, DJ Randall - Fish physiology, 2005 - Elsevier
Publisher Summary Ammonia is mainly produced in fish through catabolism of amino acids.
Ingested proteins are hydrolyzed producing amino acids, the catabolism of which leads to …

Strategies for Surviving High Concentrations of Environmental Ammonia in the Swamp Eel Monopterus albus

YK Ip, ASL Tay, KH Lee… - … and Biochemical Zoology, 2004 - journals.uchicago.edu
The swamp eel Monopterus albus lives in muddy ponds, swamps, canals, and rice fields in
the tropics. It encounters high concentrations of environmental ammonia (HEA) during dry …

Excretory nitrogen metabolism and defence against ammonia toxicity in air‐breathing fishes

SF Chew, YK Ip - Journal of fish biology, 2014 - Wiley Online Library
With the development of air‐breathing capabilities, some fishes can emerge from water,
make excursions onto land or even burrow into mud during droughts. Air‐breathing fishes …