... and drinking rates were unaffected. DOM sources tended to stimulate unidirectional Na + influx rate and exerted subtle effects on the concentration-dependent kinetics of Na + uptake, increasing maximum transport capacity. All DOM sources reduced passive Na + efflux rates regardless of pH, but exerted...

... for extracellular fluid volume, glomerular filtration rate and drinking rate. Tests (8 h) on resting freshwater trout showed that when measuring [ 3 H]PEG-4000 clearance from the plasma in the efflux direction, correction for a large excretion via glomerular filtration was essential, necessitating urinary...

... –1 h –1 in 50 ppt. Rectal fluid composition and excretion rates allowed for estimation of drinking rates, which increased with salinity from 1.38±0.30 to 2.60±0.92 and 3.82±0.58 ml kg –1 h –1 in 9, 35 and 50 ppt, respectively. By contrast, the fraction of imbibed water absorbed decreased from 85.9...

.... Drinking rate decreased substantially at 12 h (32% of control value) and remained suppressed after 3 and 7 days in fresh water (34 and 43%). By contrast, there was a transient increase in the capacity for water absorption measured across isolated intestines in vitro (3.3- and 2.6-fold at 12 h and 3 days...

... in drinking rate at low salinities(0–8‰). Diluted seawater enriched in calcium to the concentration present in full-strength seawater (i.e. constant calcium, decreasing salinity)restored intestinal calcium uptake to normal. Extra-intestinal calcium uptake also benefited from calcium addition but to a lesser...

...W. Gary Anderson; Y. Takei; N. Hazon SUMMARY An increase in drinking rate of two species of marine elasmobranch fish, Scyliorhinus canicula and Triakis scyllia , acclimated to 80% sea water was observed following the introduction of 100 % sea water to experimental tanks. The drinking response...

...A. J. H. Van Der Heijden; P. M. Verbost; M. J. C. Bijvelds; W. Atsma; S. E. Wendelaar Bonga; G. Flik ABSTRACT We examined the effects of seawater adaptation and extirpation of the Stannius corpuscles on branchial Ca 2+ flows, gill plasma membrane Ca 2+ transporters and drinking rate of European...