Effect of environmental osmotic pressure on kidney histology in rainbow trout, Salmo gairdneri Richardson

The Effect of Osmotic and Ion-osmotic Stresses on the Mortality of Rainbow Trout (salmo Gairdneri)

I. The possibility that costs of Ionic and osmotic regulation are different in fish was assessed using mortality rates of rainbow trout exposed to an ionically active substance, sodium chloride and a non-electrolyte. mannitol, in the ambient water. 2. A 24.hr LC,, of 175 mOsm was calculated from data for fish exposed to sodium chloride concns of 400.450. 500. 550. 600,650 and 700 mOsm. 3. Simil...

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...

Nocardial Infection in Hatchery-reared Fingerling Rainbow Trout (salmo Gairdneri).

Analysis of an Hertwig effect in the rainbow trout (Salmo gairdneri Richardson) after fertilization with gamma-irradiated sperm.

In this work, we tried to optimize y-treatment of sperm to obtain large numbers of haploid gynogenetic embryos after fertilization. The analysis of increasing doses showed a typical « Hertwig effect)) in all cases, but we found wide between-male variations in the most efficient dose. This variability was reduced by mixing several irradiated samples collected from different males or given differ...

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...