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Keywords: Ammonia excretion
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Journal Articles
J Exp Biol (2018) 221 (20): jeb184655.
Published: 23 October 2018
... in the gills. To further characterize the role of Pt Rh in ammonia metabolism and excretion, double-stranded RNA-mediated RNA interference of Pt Rh was employed. Knockdown of Pt Rh upregulated mRNA expression of ammonia excretion-related genes encoding aquaporin (AQP), K + channels and vesicle-associated...
Includes: Supplementary data
Journal Articles
J Exp Biol (2018) 221 (2): jeb169219.
Published: 29 January 2018
...Dirk Weihrauch; Garett J. P. Allen ABSTRACT Invertebrates employ a variety of ammonia excretion strategies to facilitate their survival in diverse aquatic environments, including freshwater, seawater and the water film surrounding soil particles. Various environmental properties set innate...
Journal Articles
J Exp Biol (2017) 220 (18): 3270–3279.
Published: 15 September 2017
... active Na + uptake are quite well understood in freshwater teleosts; however, the mechanisms employed by invertebrates are not. Pharmacological and molecular approaches were used to investigate Na + uptake mechanisms and their link to ammonia excretion in the ribbon leech Nephelopsis obscura...
Journal Articles
J Exp Biol (2015) 218 (24): 3931–3940.
Published: 1 December 2015
..., across biological membranes. Zebrafish embryos were microinjected with a translation-blocking morpholino oligonucleotide targeted to AQP1a1. Knockdown of AQP1a1 significantly reduced rates of CO 2 and ammonia excretion, as well as water fluxes, in larvae at 4 days post fertilization (dpf). Because AQP1a1...
Includes: Supplementary data
Journal Articles
J Exp Biol (2014) 217 (18): 3283–3292.
Published: 15 September 2014
... metabolic rate (RMR) in FT phenotypes when fasting, and (2) tolerance reflects differences in substrate utilisation; FT phenotypes use relatively less proteins as metabolic fuels during fasting, measured as their ammonia quotient (AQ), the simultaneous ratio of ammonia excretion to RMR...
Journal Articles
J Exp Biol (2007) 210 (14): 2419–2429.
Published: 15 July 2007
...C. Y. C. Hung; K. N. T. Tsui; J. M. Wilson; C. M. Nawata; C. M. Wood; P. A. Wright SUMMARY The mechanism(s) of ammonia excretion in the presence of elevated external ammonia are not well understood in fish. Recent studies in other organisms have revealed a new class of ammonia transporters, Rhesus...
Journal Articles
J Exp Biol (2006) 209 (14): 2704–2712.
Published: 15 July 2006
... tested the prediction that RU-486, a cortisol receptor antagonist, will cause a dose-dependent increase in urea,but not ammonia, excretion rates. Second, exposure to ketanserin, a 5-HT 2 receptor antagonist, will cause a dose-dependent decrease in urea excretion rates, but not ammonia excretion rates...
Journal Articles
J Exp Biol (2006) 209 (14): 2696–2703.
Published: 15 July 2006
... and dark, respectively. Values are expressed as means ± s.e.m.(N=8). Jurea values followed a significant rhythm(F2,9=39.6, P=0.00003). In fasted D. rerio , there was no significant circadian rhythm in urea and ammonia excretion ( F 2,9 =2.33, P =0.15, F 2,9 =1.28, P =0.33; Fig. 5A,B...
Journal Articles
J Exp Biol (2006) 209 (9): 1737–1745.
Published: 1 May 2006
... for correspondence (e-mail: patwrigh@uoguelph.ca ) 7 3 2006 © The Company of Biologists Limited 2006 2006 NH 3 volatilization nitrogen excretion ammonia excretion water pH fish skin boundary layer amphibious fish Rivulus marmoratus It has long been known that ammonia...
Journal Articles
J Exp Biol (2004) 207 (26): 4491–4504.
Published: 15 December 2004
...Dirk Weihrauch; Steve Morris; David W. Towle SUMMARY The excretory transport of toxic ammonia across epithelia is not fully understood. This review presents data combined with models of ammonia excretion derived from studies on decapod crabs, with a view to providing new impetus to investigation...
Journal Articles
J Exp Biol (2004) 207 (17): 3015–3023.
Published: 1 August 2004
... ammonia ammonia excretion feeding glutamine mudskipper nitrogen metabolism ornithine-urea cycle Periophthalmodon schlosseri urea When confronted with aerial exposure, tropical air-breathing fishes would be expected to have difficulties excreting ammonia, resulting in an accumulation...
Journal Articles
J Exp Biol (2004) 207 (5): 777–786.
Published: 15 February 2004
... 11 2003 © 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...
Journal Articles
J Exp Biol (2003) 206 (20): 3625–3633.
Published: 15 October 2003
... Limited 2003 2003 ammonia ammonia detoxification ammonia excretion 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...
Journal Articles
J Exp Biol (2003) 206 (9): 1523–1533.
Published: 1 May 2003
... mechanism in the gill of the toadfish. glutamine synthetase toadfish ureotely ornithine–urea cycle ammonia detoxification Opsanus beta ammonia excretion gill ORF UTR * Author for correspondence (e-mail: pwalsh@rsmas.miami.edu ) 21 1 2003 © The Company of Biologists...
Journal Articles
J Exp Biol (2002) 205 (19): 3039–3054.
Published: 1 October 2002
... by DPC (10 -4 mol l -1 ) and thiocyanate (10 -4 mol l -1 ). Ammonia excretion was unresponsive to large changes in water Na + concentration, but was elevated by 70% during acute exposure to pH 4.0 and transiently inhibited by approximately 50% by amiloride and its analogues. The strategy of adaptation...
Journal Articles
J Exp Biol (2002) 205 (18): 2765–2775.
Published: 15 September 2002
...Dirk Weihrauch; Andreas Ziegler; Dietrich Siebers; David W. Towle SUMMARY Although aquatic animals are generally believed to export nitrogenous waste by diffusion of NH 3 or NH 4 + across external epithelia, evidence for active ammonia excretion has been found in a number of species...
Journal Articles
J Exp Biol (2001) 204 (24): 4281–4289.
Published: 15 December 2001
..., oxygen consumption and ammonia excretion rates increased approximately twofold following exhaustive exercise. Post-exercise oxygen consumption rates decreased to control levels within 30 min in both sturgeon species, but post-exercise ammonia excretion rates remained high in Atlantic sturgeon throughout...
Journal Articles
J Exp Biol (1990) 151 (1): 361–369.
Published: 1 July 1990
... unusual amongst aquatic animals in its adverse response to neutral water. 20 2 1990 © 1990 by Company of Biologists 1990 urea excretion ammonia excretion swimming speed Lake Magadi soda lake J. exp. Biol. 151, 361-369 (1990) 3 6 1 Printed in Great Britain © The Company...
Journal Articles
J Exp Biol (1988) 136 (1): 461–481.
Published: 1 May 1988
... correlated well with [Na + -Cl − ] net flux, in accord with strong ion difference theory. 11 1 1988 © 1988 by Company of Biologists 1988 gills kidney trout acid-base regulation ionoregulation ammonia excretion J. exp. Biol. 136, 461-481 (1988) 4 6 1 Printed in Great Britain ©...