Adrenaline and Branchial Nerve Stimulation Inhibit 45Ca Influx into the Gills of Rainbow Trout, Salmo Gairdneri
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چکیده
منابع مشابه
Water flow and gas exchange at the gills of rainbow trout, Salmo gairdneri.
The Fick principle has often been used to estimate the volume flow of water per unit time over the gills of fishes. Application of the Fick principle requires accurate measurement of mean oxygen tensions in water entering and leaving the gills and of total oxygen uptake. Cannulae of various types have frequently been used to sample water entering and leaving the gills (van Dam, 1938; Holeton & ...
متن کاملOn the Mechanisms of Sodium Ion Transport by the Irrigated Gills of Rainbow Trout (Salmo gairdneri)
Sodium uptake by rainbow trout gills has been investigated with a small-volume system enabling rapid, successive flux measurements in different solutions. Sodium influx obeys a Michaelis-Menten type relation, with a K(m) of 0.46 mM, and uptake proceeds unimpaired in the absence of penetrating counter-ions. This suggests a coupled cation exchange. Ammonia output is about the same as the Na(+) in...
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Active sodium uptake from dilute media has been described extensively in a number of aquatic vertebrates, and we have some understanding of the cellular mechanisms involved (Koefoed-Johnsen & Ussing, 1958; Ussing & Windhager, 1964; Biber, Chez & Curran, 1966). While chloride transport has been neglected by comparison, chloride uptake systems are found in diverse groups of animals and deserve mo...
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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...
متن کاملToxicokinetics 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...
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ژورنال
عنوان ژورنال: Journal of Experimental Biology
سال: 1989
ISSN: 1477-9145,0022-0949
DOI: 10.1242/jeb.141.1.441