HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) All Versions of this Article: 285/4/R897    most recent 00161.2003v1 Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Web of Science (19) Citing Articles via Google Scholar Google Scholar Articles by Sangiao-Alvarellos, S. Articles by Soengas, J. L. Search for Related Content PubMed PubMed Citation Articles by Sangiao-Alvarellos, S. Articles by Soengas, J. L.

THIRST AND VOLUME, ELECTROLYTE HOMEOSTASIS

Acclimation of S. aurata to various salinities alters energy metabolism of osmoregulatory and nonosmoregulatory organs

¹Laboratorio de Fisioloxía Animal, Facultade de Ciencias, Universidade de Vigo, 36200 Vigo; and²Departamento de Biología, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain

Submitted 31 March 2003 ; accepted in final form 18 June 2003

The impact of different environmental salinities on the energy metabolism of gills, kidney, liver, and brain was assessed in gilthead sea bream (Sparus aurata) acclimated to brackish water [BW, 12 parts/thousand (ppt)], seawater (SW, 38 ppt) and hyper saline water (HSW, 55 ppt) for 14 days. Plasma osmolality and levels of sodium and chloride presented a clear direct relationship with environmental salinities. A general activation of energy metabolism was observed under different osmotic conditions. In liver, an enhancement of glycogenolytic and glycolytic potential was observed in fish acclimated to BW and HSW compared with those in SW. In plasma, an increased availability of glucose, lactate, and protein was observed in parallel with the increase in salinity. In gills, an increased Na⁺-K⁺-ATPase activity, a clear decrease in the capacity for use of exogenous glucose and the pentose phosphate pathway, as well as an increased glycolytic potential were observed in parallel with the increased salinity. In kidney, Na⁺-K⁺-ATPase activity and lactate levels increased in HSW, whereas the capacity for the use of exogenous glucose decreased in BW- and HSW- acclimated fish compared with SW-acclimated fish. In brain, fish acclimated to BW or HSW displayed an enhancement in their potential for glycogenolysis, use of exogenous glucose, and glycolysis compared with SW-acclimated fish. Also in brain, lactate and ATP levels decreased in parallel with the increase in salinity. The data are discussed in the context of energy expenditure associated with osmotic acclimation to different environmental salinities in fish euryhaline species.

Gilthead sea bream; Sparus aurata; osmoregulation; energy metabolism

This article has been cited by other articles:

				Y.-C. Tseng, C.-J. Huang, J. C.-H. Chang, W.-Y. Teng, O. Baba, M.-J. Fann, and P.-P. Hwang Glycogen phosphorylase in glycogen-rich cells is involved in the energy supply for ion regulation in fish gill epithelia Am J Physiol Regulatory Integrative Comp Physiol, July 1, 2007; 293(1): R482 - R491. [Abstract] [Full Text] [PDF]

				E. E. Deane and N. Y. S. Woo Differential gene expression associated with euryhalinity in sea bream (Sparus sarba) Am J Physiol Regulatory Integrative Comp Physiol, November 1, 2004; 287(5): R1054 - R1063. [Abstract] [Full Text] [PDF]