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Keywords: ammonia
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Journal Articles
J Exp Biol (2019) 222 (3): jeb194787.
Published: 1 February 2019
... nitrogen in the gills, kidney, rectal gland and gut, but as yet, the latter are not well characterized. Intestinal sac preparations of the Pacific spiny dogfish shark ( Squalus acanthias suckleyi ) incubated in vitro strongly reabsorbed urea from the lumen after feeding, but mucosal fluid ammonia...
Journal Articles
J Exp Biol (2018) 221 (19): jeb185553.
Published: 5 October 2018
... oxygen consumption and ammonia excretion rates in the two compartments and found that, at rest, squid only obtain enough oxygen cutaneously to meet the demand of the skin tissue locally (12% of total) and excrete little ammonia across the skin. The majority of oxygen is obtained via the traditional...
Journal Articles
Journal Articles
J Exp Biol (2016) 219 (18): 2814–2818.
Published: 15 September 2016
...Alexander M. Clifford; Alex M. Zimmer; Chris M. Wood; Greg G. Goss ABSTRACT Hagfish skin has been reported as an important site for ammonia excretion and as the major site of systemic oxygen acquisition. However, whether cutaneous O 2 uptake is the dominant route of uptake remains under debate; all...
Includes: Supplementary data
Journal Articles
Journal Articles
J Exp Biol (2013) 216 (21): 4025–4037.
Published: 1 November 2013
...Li Zhang; C. Michele Nawata; Chris M. Wood SUMMARY Ammonia has been documented as a respiratory gas that stimulates ventilation, and is sensed by peripheral neuroepithelial cells (NECs) in the gills in ammoniotelic rainbow trout. However, the hyperventilatory response is abolished in trout...
Journal Articles
J Exp Biol (2013) 216 (15): 2821–2832.
Published: 1 August 2013
...Carol Bucking; Christophe M. R. LeMoine; Paul M. Craig; Patrick J. Walsh SUMMARY Digestion affects nitrogen metabolism in fish, as both exogenous and endogenous proteins and amino acids are catabolized, liberating ammonia in the process. Here we present a model of local detoxification of ammonia...
Journal Articles
J Exp Biol (2012) 215 (21): 3723–3733.
Published: 1 November 2012
... in water. Buccopharyngeal urea excretion in P. sinensis was highly efficient during emersion because the sum total of nitrogenous (ammonia-N + urea-N) excretion through the mouth and the urine ( Table 2 ) during forced emersion accounted for >90% of the nitrogenous wastes excreted by control turtles...
Includes: Supplementary data
Journal Articles
J Exp Biol (2012) 215 (2): 314–323.
Published: 15 January 2012
...Tamara M. Rodela; M. Danielle McDonald; Patrick J. Walsh; Kathleen M. Gilmour SUMMARY In their native environment, gulf toadfish excrete equal quantities of ammonia and urea. However, upon exposure to stressful conditions in the laboratory (i.e. crowding, confinement or air exposure), toadfish...
Includes: Supplementary data
Journal Articles
Journal Articles
J Exp Biol (2011) 214 (23): 4048–4054.
Published: 1 December 2011
...Quanxi Zhang; Ziqiang Meng SUMMARY Ammonia (NH 3 ) is a common exogenous gas in the atmosphere, as well as an endogenous chemical produced by amino acid catabolism and other pathways in vivo . Physiological and pathophysiological roles of NH 3 in the nervous system have been studied. Recently...
Journal Articles
J Exp Biol (2011) 214 (22): 3775–3781.
Published: 15 November 2011
...L. Gerardo Herrera M.; Jazmín Osorio M.; Carlos A. Mancina G. SUMMARY We tested the role of increased ammonia in urine as an energy- and/or nitrogen (N)-saving mechanism in the great fruit-eating bat Artibeus lituratus (Phyllostomidae). We compared N excretion in two groups of bats fed energy-rich...
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Journal Articles
J Exp Biol (2009) 212 (15): 2394–2402.
Published: 1 August 2009
...Tammy Laberge; Patrick J. Walsh; M. Danielle McDonald SUMMARY The gulf toadfish ( Opsanus beta ) is a facultatively ureotelic fish that excretes primarily urea under conditions of crowding or confinement. To examine the relationship between ammonia production, urea production and the ornithine–urea...
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J Exp Biol (2006) 209 (21): 4254–4261.
Published: 1 November 2006
...John F. Barimo; Patrick J. Walsh SUMMARY Because urea is bioenergetically expensive to synthesize, few aquatic teleostean (bony) fish make or excrete much urea beyond early development and excrete the majority of nitrogenous waste as the readily diffusible ammonia. The gulf toadfish is one of a few...
Includes: Multimedia, Supplementary data
Journal Articles
J Exp Biol (2006) 209 (7): 1179–1184.
Published: 1 April 2006
...D. J. Randall; T. K. N. Tsui SUMMARY The gills are the major site of acid–base regulation in most fish. Acid–base transfer across fish gills is dominated by carbon dioxide and ammonia excretion, especially the former. Bicarbonate buffering in the blood is less than that found in mammals; regulation...
Journal Articles