... transporters Ionocyte Nitrogen metabolism The climbing perch, Anabas testudineus (Bloch 1792), is a freshwater teleost belonging to Order Perciformes and Family Anabantidae. It can be found in canals, lakes, ponds, swamps and estuaries in tropical Asia, and can tolerate extremely unfavorable water...

...Yuen K. Ip; Serene M. L. Lee; Wai P. Wong; Shit F. Chew SUMMARY The objective of this study was to examine the effects of 6 days of emersion on nitrogen metabolism and excretion in the Chinese soft-shelled turtle, Pelodiscus sinensis . Despite having a soft shell with a cutaneous surface...

... turtles more than a century after their discovery by Gage and Gage ( Gage and Gage, 1886 ). * Author for correspondence ( dbsipyk@nus.edu.sg ) 1 12 2011 6 8 2012 © 2012. 2012 ammonia buccopharyngeal respiration buccopharyngeal villiform processes nitrogen metabolism...

... ( sfperry@uottawa.ca ) 26 7 2010 © 2010. 2010 gill Rh proteins interlamellar cell mass osmorespiratory compromise nitrogen metabolism Ammonia excretion in fish occurs predominantly at the gill with only a minor fraction (<10%) being excreted by the kidney ( Maetz, 1972...

... for correspondence ( dbsipyk@nus.edu.sg ) 2 9 2009 © 2009. 2009 amino acids freshwater stingray glutamate glutamine glutamine synthetase glutamate dehydrogenase nitrogen metabolism Potamotrygon motoro urea Freshwater fishes undergo hyperosmotic regulation and are confronted...

... elevated in crowded fish. These results suggest that the activities of O–UC enzymes are better predictors for urea production than O–UC enzyme mRNA expression levels. * Author for correspondence (e-mail: tlaberge@rsmas.miami.edu ) 27 4 2009 2009 nitrogen metabolism transcription...

... that M. albus had the capacity to regulate nitrogen metabolism and excretion for osmoregulatory purposes. Indeed, there were increases in various FAA and TFAA content of tissues of fish exposed to 25‰ water. Specifically, there were increases in some non-essential FAAs, which could be synthesized...

... conditions. Moreover, elevation of GSase activities in fore-, mid- and hindbrain in response to environmental ammonia underlines the importance of brain GSase in the ammonia-stress response. ammonia toxicity liver enzyme activity gene expression mRNA nitrogen metabolism glutamine sublethal ammonia...

... signifer nitrogen metabolism osmoregulation urea Marine elasmobranchs are ureogenic because they possess a functional ornithine-urea cycle (OUC) and synthesize urea through carbamoyl phosphate synthetase III (CPS III; Campbell and Anderson, 1991 ; Anderson,2001 ). Their extracellular fluids...

... . Third edition (ed. C. L. Prosser), pp. 279 -316. Philadelphia: Saunders College Publishing. Campbell, J. W. ( 1991 ). Excretory nitrogen metabolism. In Comparative Animal Physiology, vol. 1 Environmental and Metabolic Physiology (ed. C. L. Prosser),pp. 277 -324. New York: Wiley-Liss...

...: Ecosystem Science and Management Program, University of Northern British Columbia, Prince George, BC, Canada V2N 4Z9 23 2 2004 © The Company of Biologists Limited 2004 2004 ornithine–urea cycle arginine urea nitrogen metabolism mitochondrial targeting Oncorhynchus mykiss...

... © The Company of Biologists Limited 2004 2004 aestivation Protopterus dolloi lungfish nitrogen metabolism ammonia excretion urea excretion mucus cocoon Lungfishes (or dipnoans, as they are `dual breathers') are an archaic group of fishes, characterized by the possession...

... amino acid carbamoyl phosphate synthetase elasmobranch Himantura signifer nitrogen metabolism ornithine-urea cycle osmoregulation stingray urea urea excretion The synthesis of excretory urea in certain land planaria( Campbell, 1965 ), earthworms(Bishop and Campbell, 1963 , 1965...

...Marie-Cécile De Cian; Michèle Regnault; François H. Lallier ABSTRACT The distribution of nitrogen metabolism end-products and the associated enzyme activities, free amino acids and purine base catabolites were investigated in all the body compartments (circulating fluids and tissues...

... is able to regulate its internal ammonia levels during such a prolonged emersion, are discussed. * e-mail: durand@sb-roscoff.fr 20 05 1999 19 07 1999 © 1999 by Company of Biologists 1999 air-exposure nitrogen metabolism amino acid urate protein haemolymph muscle...

... in the isotopic differences between locusts and their diet at the biochemical level. * e-mail: Sarah.Webb@ogs.co.uk 16 7 1998 22 9 1998 © The Company of Biologists Limited 1998 diet locust Locusta migratoria substrate recycling carbon metabolism nitrogen metabolism...

... environmental hypercapnia extracellular pH free ADP Gibb’s free energy change of ATP hydrolysis H + transfer intracellular pH metabolic depression nitrogen metabolism phospho-L-arginine ventilation peanut worm Sipunculus nudus The sipunculid worm Sipunculus nudus is exposed to low tide...

... © The Company of Biologists Limited 1997 ammonia taurine clam symbiosis Solemya reidi nitrogen metabolism Solemya reidi is a gutless protobranch clam that inhabits burrows in sulfidic sediments on the Pacific coast of the United States and Canada ( Bernard, 1980 ). Reduction...

...-mail: woodcm@mcmail.cis.mcmaster.ca . 10 01 1997 © The Company of Biologists Limited 1997 urea ureotelism pulsatile excretion toadfish Opsanus beta gills liver cortisol nitrogen metabolism Nitrogen metabolism in the gulf toadfish Opsanus beta is most unusual. Unlike...

... stimulates nitrogen metabolism in the sea raven. Amino acid catabolism may be a major source of substrate for gluconeogenesis and/or oxidation, while fatty acid mobilization may provide the fuel for endogenous use by the liver in cortisol-treated sea raven. These results further support the hypothesis...