... a potential role in potassium balance. Potassium regulation Fresh water Acid–base regulation In the aquatic environment, fishes are exposed to many challenges that require regulation of ions and acid–base balance ( Evans et al., 2005 ; Marshall and Grosell, 2005 ). In fresh water (FW), fishes...

... the deuterium oxide dilution technique. Rates were quantified in animals using four experimental treatments: (1) held in fresh water and fed lettuce ( N =4), (2) held in salt water and fed lettuce ( N =2), (3) acutely exposed to salt water and fed lettuce ( N =4), and (4) chronically exposed to salt water...

... cytoskeleton fresh water confocal microscopy colchicine wheat germ agglutinin ionic regulation tilapia Oreochromis mossambicus The gill is the major organ specialized for ionic regulation in fish. In gills, the mitochondria-rich (MR) cell, also known as the chloride cell, is a maturely...

... MR cells that are in contact with the water (cells labelled with both DASPMI and Concanavalin-A) and those that are not (DASPMI-positive only). This method was used to describe differences in MR cell density that occur in the gills of tilapia Oreochromis mossambicus adapted to fresh water or sea...

... © 1993 by Company of Biologists 1993 tilapia Oreochromis mossambicus recombinant growth hormone fresh water chloride cells growth calcium flux A characteristic of the members of the prolactin gene family is their pleiotropic nature. In fish, growth hormone (GH) acts...

...William S. Marshall; Sharon E. Bryson; Chris M. Wood ABSTRACT The skin overlying the cleithrum bone of freshwater-acclimated rainbow trout contains numerous mitochondria-rich (MR) cells, as detected by DASPEI fluorescence. This tissue was mounted in vitro in an Ussing-style chamber with fresh water...

...J. A. Van Der Velden; F. A. T. Spanings; G. Flik; S. E. Wendelaar Bonga ABSTRACT Carp eggs, fertilized in vitro , were allowed to develop in fresh water with magnesium concentrations varying from 0·001 to 0·100 mmol l −1 . Magnesium concentrations below 0·010 mmol l −1 seriously impeded carp...

... sodium, proton and ammonia transport through the gill epithelium is proposed. 1 11 1988 © 1989 by Company of Biologists 1989 fresh water trout isolated head ammonia sodium protons Freshwater teleosts compensate for the constant diffusional loss of ions by active branchial...

... excretion sea water fresh water Exhaustive exercise in fish leads to a marked extracellular acidosis of respiratory and metabolic origin. The nature, severity and duration of this acid-base disturbance have been well characterized (see reviews by Wood & Perry, 1985 ; Heisler, 1986...