... pathways, ion and ammonia transporters, hemolymph osmolality and ammonia concentration in Litopenaeus vannamei after injection of 10 −7 and 10 −6 mol DA per shrimp. The data showed a significant increase in crustacean hyperglycemic hormone (CHH) concentration at 1–12 h and a transient significant decrease...

...Lingjun Si; Luqing Pan; Hongdan Wang; Xin Zhang ABSTRACT Effects of ammonia-N (0.05, 2, 10 and 20 mg l −1 ) on the neuroendocrine regulation of ammonia transport were investigated in Litopenaeus vannamei . The results showed that corticotrophin-releasing hormone, adrenocorticotropic hormone...

... declared. 30 7 2012 2 4 2013 © 2013. Published by The Company of Biologists Ltd 2013 high environmental ammonia high alkalinity ammonia transport urea transport gills Na + ,K + -ATPase Alcolapia grahami Only recently has it been realized that ammonia excretion across...

... basolateral ( Rhbg ; Fig. 8B ) and apical ( Rhcg2 ; Fig. 8D ) ammonia transporters, as well as apical H + -ATPase ( Fig. 9B ), thought to be a key mechanism for acidifying the boundary layer and energizing Na + uptake in FW trout ( Parks et al., 2007 ; Parks et al., 2008 ). As part of the Na + /NH 4...

...C. Michele Nawata; Shigehisa Hirose; Tsutomu Nakada; Chris M. Wood; Akira Kato SUMMARY Rhesus (Rh) protein involvement in ammonia transport processes in freshwater fish has received considerable attention; however, parallel investigations in seawater species are scant. We exposed pufferfish to high...

...C. Michele Nawata; Chris M. Wood; Michael J. O'Donnell SUMMARY Recent experimental evidence from rainbow trout suggests that gill ammonia transport may be mediated in part via Rhesus (Rh) glycoproteins. In this study we analyzed the transport properties of trout Rh proteins (Rhag, Rhbg1, Rhbg2...

... 8 2009 © 2009. 2009 Rh glycoproteins urea transporter ammonia transport gills gene expression How animals excrete the toxic products of amino acid catabolism (specifically ammonia and urea) has been a topic of study for nearly a century ( Smith, 1929 ). While...

...Patricia A. Wright; Chris M. Wood SUMMARY Ammonia excretion at the gills of fish has been studied for 80 years, but the mechanism(s) involved remain controversial. The relatively recent discovery of the ammonia-transporting function of the Rhesus (Rh) proteins, a family related to the Mep/Amt...

...@uottawa.ca ) 19 11 2008 2009 fish crustaceans gills ammonia transport urea transport UT Rh proteins Nitrogenous waste excretion in aquatic species is accomplished largely at the gills. Because these species have very large convective water volume requirements in order...

...-treatment with apical freshwater low in [Na + ] caused increases in both Rhcg2 mRNA expression and ammonia efflux without change in paracellular permeability. These data suggest that Rhesus glycoproteins are important for ammonia transport in the freshwater trout gill, and may help to explain in vivo data...

..., mirroring those in trout exposed to high environmental ammonia. Therefore a dual function for gill and skin Rh proteins in CO 2 and ammonia transport is not evident from these results. Rhag expression, however, responded differentially to high CO 2 and high ammonia, suggesting a possible dual role...

... the conversion of NH 3 to NH 4 + upon entry into the USL. * Author for correspondence: e-mail: patwright@uoguelph.ca . 13 08 1996 ©The Company of Biologists Limited 1996 ammonia transport ammonia excretion yolk perivitelline fluid pH amiloride acid unstirred layer electrical...

..., Hamilton, Ontario, Canada L8S 4K1. 13 10 1992 © 1993 by Company of Biologists 1993 ammonia transport NH 3 NH 4 + urea alkaline water pH Na + /NH 4 + exchange nitrogen excretion trout Oncorhynchus clarki henshaw Ammonia excretion in aquatic animals is strongly...