Studies on the nutrition of salmonid fish. The magnesium requirement of rainbow trout (Salmo gairdneri)

Studies on the nutrition of rainbow trout (Salmo gairdneri). Magnesium deficiency: the effect of feeding with a Mg-supplemented diet.

The production of renal calcinosis by magnesium deficiency in rainbow trout (Salmo gairdneri).

1. Replicate groups of rainbow trout (Salmo gairdneri) were given one of five experimental diets (diets 1-5) for 16 weeks. The diets contained different amounts of calcium, phosphorus and magnesium and were prepared so that there were three levels of Ca (g/kg): 14 (diet l) , 26 (diets 2 and 3) and 40 (diets 4 and 5) , Ca:P being approximately 1 : I in all diets. Diets 1, 2 and 4 had basal Mg le...

Studies on the glomerular filtration rate of rainbow trout (Salmo gairdneri).

The rainbow trout (Salmo gairdneri) and its anadromous form, the steelhead trout, maintain their milieu intbrieur hypotonic to the environment after transfer to sea water (Houston, 1959, i960). Such a transfer involves the physiological adjustment from a condition of continual hydration and electrolyte depletion to the opposite circumstance of a sustained tendency towards dehydration and excess...

Lactate and Proton Dynamics in the Rainbow Trout (salmo Gairdneri)

Chronically cannulated rainbow trout were subjected to 6 min of severe burst exercise and monitored over a 12 h recovery period. There were shortlived increases in haematocrit, haemoglobin, plasma protein, Na and Cl~ levels. Plasma [Cl~] later declined below normal as organic anions accumulated. A much larger and more prolonged elevation in plasma [K] probably resulted from intracellular acidos...

Toxicokinetics of Fenvalerate in Rainbow Trout (Salmo Gairdneri)

An in vivo rainbow trout (Salmo gairdneri) preparation was used to evaluate the gill uptake and toxicokinetics of [3H]fenvalerate ([R,S]-α-cyano-3-phenoxybenzyl [R,S]-2-[4-chloro-phenyl]-3-methylbutyrate), a synthetic pyrethroid insecticide. Fish were exposed to technical-grade fenvalerate (0.28 or 23 ng/L) or an emulsifiable-concentrate formulation (16 ng/L) for 36 to 48 h. No significant effe...