Kidney function in response to salt feeding in rainbow trout (Salmo gairdneri richardson)

The effects of salt-induced hypertension on α1-adrenoreceptor expression and cardiovascular physiology in the rainbow trout (Oncorhynchus mykiss)

“…The influx of water across the gills would be further increased, owing to an increased osmotic gradient associated with salt loading. Although a previous study showed that urine flow rate increased by ϳ33% in trout fed a high-salt diet (17), this diuresis would not appear to be sufficient to restore vascular fluid volume and hence cardiac output. Thus, unlike in mammalian models that generally require experimentally induced renal dysfunction, salt-induced hypertension can occur in fish possessing a fully functional kidney.…”

The effects of salt-induced hypertension on α1-adrenoreceptor expression and cardiovascular physiology in the rainbow trout (Oncorhynchus mykiss)

“…The influx of water across the gills would be further increased, owing to an increased osmotic gradient associated with salt loading. Although a previous study showed that urine flow rate increased by ϳ33% in trout fed a high-salt diet (17), this diuresis would not appear to be sufficient to restore vascular fluid volume and hence cardiac output. Thus, unlike in mammalian models that generally require experimentally induced renal dysfunction, salt-induced hypertension can occur in fish possessing a fully functional kidney.…”

Susceptibility of Nile tilapia (Oreochromis niloticus) fed with dietary sodium chloride to nitrite toxicity

“…Dietary supplementation of sodium chloride has been shown to improve growth of other fish species as well, such as sea bass (Eroldogan et al 2005) and Indian carp, (Nandeesha et al 2000). In rainbow trout, however, the results have been mixed (MacLeod 1978;Salman and Eddy 1988) and may be dependent upon fish size, with small trout (1.7 g) showing improvement and larger fish (59 g) exhibiting negative effects of dietary sodium chloride on growth (Park et al 1998). Tilapia at the end of this study were approximately 65 g in the 6% NaCl group, suggesting that the effect of NaCl supplementation on tilapia growth is likely not limited by size.…”

Weaning of Burbot, Lota lota (L.) from Live to Dry Feed Using NaCl as Dietary Attractant

“…Elevated NaCl concentrations of 10% and prolonged feeding with diets containing 5% NaCl (see large scale weaning experiments) were also suboptimal as they led to stagnation in growth. Data on the organismic response to dietary salt uptake are available for rainbow trout (Salman & Eddy, 1988;James-Curtis & Wood, 1992). For trout fed a dietary NaCl concentration of 5% branchial Na + influx rates were reduced to compensate for the NaCl uptake across the digestive tract.…”

“…For trout fed a dietary NaCl concentration of 5% branchial Na + influx rates were reduced to compensate for the NaCl uptake across the digestive tract. All of the dietary NaCl was reabsorbed by the kidney tubules, indicating that this organ removed NaCl from the urine, regardless of the NaCl concentration (Salman & Eddy, 1988;James-Curtis & Wood, 1992). NaCl concentrations > 5% induced an elevation in plasma Na + concentration, increased gill efflux and decreased branchial Na + uptake indicating disturbance in osmotic equilibrium (Salman & Eddy, 1988;James-Curtis & Wood, 1992).…”

The effects of salt-induced hypertension on α1-adrenoreceptor expression and cardiovascular physiology in the rainbow trout (Oncorhynchus mykiss)

“…The influx of water across the gills would be further increased, owing to an increased osmotic gradient associated with salt loading. Although a previous study showed that urine flow rate increased by ϳ33% in trout fed a high-salt diet (17), this diuresis would not appear to be sufficient to restore vascular fluid volume and hence cardiac output. Thus, unlike in mammalian models that generally require experimentally induced renal dysfunction, salt-induced hypertension can occur in fish possessing a fully functional kidney.…”

Susceptibility of Nile tilapia (Oreochromis niloticus) fed with dietary sodium chloride to nitrite toxicity

“…Dietary supplementation of sodium chloride has been shown to improve growth of other fish species as well, such as sea bass (Eroldogan et al 2005) and Indian carp, (Nandeesha et al 2000). In rainbow trout, however, the results have been mixed (MacLeod 1978;Salman and Eddy 1988) and may be dependent upon fish size, with small trout (1.7 g) showing improvement and larger fish (59 g) exhibiting negative effects of dietary sodium chloride on growth (Park et al 1998). Tilapia at the end of this study were approximately 65 g in the 6% NaCl group, suggesting that the effect of NaCl supplementation on tilapia growth is likely not limited by size.…”

Weaning of Burbot, Lota lota (L.) from Live to Dry Feed Using NaCl as Dietary Attractant

“…Elevated NaCl concentrations of 10% and prolonged feeding with diets containing 5% NaCl (see large scale weaning experiments) were also suboptimal as they led to stagnation in growth. Data on the organismic response to dietary salt uptake are available for rainbow trout (Salman & Eddy, 1988;James-Curtis & Wood, 1992). For trout fed a dietary NaCl concentration of 5% branchial Na + influx rates were reduced to compensate for the NaCl uptake across the digestive tract.…”

“…For trout fed a dietary NaCl concentration of 5% branchial Na + influx rates were reduced to compensate for the NaCl uptake across the digestive tract. All of the dietary NaCl was reabsorbed by the kidney tubules, indicating that this organ removed NaCl from the urine, regardless of the NaCl concentration (Salman & Eddy, 1988;James-Curtis & Wood, 1992). NaCl concentrations > 5% induced an elevation in plasma Na + concentration, increased gill efflux and decreased branchial Na + uptake indicating disturbance in osmotic equilibrium (Salman & Eddy, 1988;James-Curtis & Wood, 1992).…”

The effects of salt-induced hypertension on α1-adrenoreceptor expression and cardiovascular physiology in the rainbow trout (Oncorhynchus mykiss)

“…The influx of water across the gills would be further increased, owing to an increased osmotic gradient associated with salt loading. Although a previous study showed that urine flow rate increased by ϳ33% in trout fed a high-salt diet (17), this diuresis would not appear to be sufficient to restore vascular fluid volume and hence cardiac output. Thus, unlike in mammalian models that generally require experimentally induced renal dysfunction, salt-induced hypertension can occur in fish possessing a fully functional kidney.…”

Susceptibility of Nile tilapia (Oreochromis niloticus) fed with dietary sodium chloride to nitrite toxicity

“…Dietary supplementation of sodium chloride has been shown to improve growth of other fish species as well, such as sea bass (Eroldogan et al 2005) and Indian carp, (Nandeesha et al 2000). In rainbow trout, however, the results have been mixed (MacLeod 1978;Salman and Eddy 1988) and may be dependent upon fish size, with small trout (1.7 g) showing improvement and larger fish (59 g) exhibiting negative effects of dietary sodium chloride on growth (Park et al 1998). Tilapia at the end of this study were approximately 65 g in the 6% NaCl group, suggesting that the effect of NaCl supplementation on tilapia growth is likely not limited by size.…”

Weaning of Burbot, Lota lota (L.) from Live to Dry Feed Using NaCl as Dietary Attractant

“…Elevated NaCl concentrations of 10% and prolonged feeding with diets containing 5% NaCl (see large scale weaning experiments) were also suboptimal as they led to stagnation in growth. Data on the organismic response to dietary salt uptake are available for rainbow trout (Salman & Eddy, 1988;James-Curtis & Wood, 1992). For trout fed a dietary NaCl concentration of 5% branchial Na + influx rates were reduced to compensate for the NaCl uptake across the digestive tract.…”

“…For trout fed a dietary NaCl concentration of 5% branchial Na + influx rates were reduced to compensate for the NaCl uptake across the digestive tract. All of the dietary NaCl was reabsorbed by the kidney tubules, indicating that this organ removed NaCl from the urine, regardless of the NaCl concentration (Salman & Eddy, 1988;James-Curtis & Wood, 1992). NaCl concentrations > 5% induced an elevation in plasma Na + concentration, increased gill efflux and decreased branchial Na + uptake indicating disturbance in osmotic equilibrium (Salman & Eddy, 1988;James-Curtis & Wood, 1992).…”