Influence of Copper Exposure on Whole-Body Sodium Levels in Larval Fathead Minnows (Pimephales promelas)

2007 ◽  
Vol preprint (2008) ◽  
pp. 1
Author(s):  
Eric VanGenderen ◽  
Joseph Tomasso ◽  
Stephen Klaine
Keyword(s):  
Pimephales Promelas ◽  
Whole Body ◽  
Copper Exposure ◽  
Fathead Minnows ◽  
Body Sodium

INFLUENCE OF COPPER EXPOSURE ON WHOLE-BODY SODIUM LEVELS IN LARVAL FATHEAD MINNOWS (PIMEPHALES PROMELAS)

2008 ◽  
Vol 27 (6) ◽  
pp. 1442 ◽  
Author(s):  
Eric J. Van Genderen ◽  
Joseph R. Tomasso ◽  
Stephen J. Klaine
Keyword(s):  
Pimephales Promelas ◽  
Whole Body ◽  
Copper Exposure ◽  
Fathead Minnows ◽  
Body Sodium

WHOLE-BODY SODIUM CONCENTRATION IN LARVAL FATHEAD MINNOWS (PIMEPHALES PROMELAS) DURING AND FOLLOWING COPPER EXPOSURE

2006 ◽  
Vol 25 (6) ◽  
pp. 1635 ◽  
Author(s):  
Holly M. Zahner ◽  
Eric J. VanGenderen ◽  
Joseph R. Tomasso ◽  
Stephen J. Klaine
Keyword(s):  
Pimephales Promelas ◽  
Sodium Concentration ◽  
Whole Body ◽  
Copper Exposure ◽  
Fathead Minnows ◽  
Body Sodium

Acclimation to Copper by Rainbow Trout, Salmo gairdneri: Physiology

1987 ◽  
Vol 44 (1) ◽  
pp. 99-104 ◽  
Author(s):  
Darrel Jon Laurén ◽  
D. G. McDonald
Keyword(s):  
Rainbow Trout ◽  
Kinetic Parameters ◽  
Maximum Rate ◽  
Sodium Concentration ◽  
Whole Body ◽  
Salmo Gairdneri ◽  
Copper Exposure ◽  
Sodium Efflux ◽  
Sodium Uptake ◽  
Body Sodium

Juvenile rainbow trout (Salmo gairdneri) were exposed to 55 μg copper∙L−1 for 28 d and then transferred to uncontaminated water for 7 d. Whole body sodium concentration and sodium uptake (Jin) were measured at weekly intervals; Jin was measured at various Na+ concentrations and kinetic parameters estimated. After 24 h of copper exposure, the maximum rate of sodium uptake (Jmax) was inhibited by 55%, the affinity for sodium (Km) reduced by 49%, and whole body Na+ decreased by about 12.5%. After 7 d of exposure, whole body Na+ had returned to control values, but Jmax was still inhibited by 41%. Recovery of whole body Na+ occurred largely by a reduction of sodium efflux (Jout). Both Jmax and Km continued to recover until day 28, at which time Jin had returned to control values. We conclude that acclimation to sublethal copper depends on changes in both Na+ transport and permeability.

Development of apical pits in chloride cells of the gills of Pimephales promelas after chronic exposure to acid water

1983 ◽  
Vol 41 ◽  
pp. 462-463
Author(s):  
Richard L. Leino ◽  
Jon G. Anderson ◽  
J. Howard McCormick
Keyword(s):  
Confidence Interval ◽  
Chronic Exposure ◽  
Lake Superior ◽  
Pimephales Promelas ◽  
Chloride Cells ◽  
Fathead Minnows ◽  
Secondary Lamellae ◽  
Untreated Water ◽  
Water Ph ◽  
Flow Through

Groups of 12 fathead minnows were exposed for 129 days to Lake Superior water acidified (pH 5.0, 5.5, 6.0 or 6.5) with reagent grade H2SO4 by means of a multichannel toxicant system for flow-through bioassays. Untreated water (pH 7.5) had the following properties: hardness 45.3 ± 0.3 (95% confidence interval) mg/1 as CaCO3; alkalinity 42.6 ± 0.2 mg/1; Cl- 0.03 meq/1; Na+ 0.05 meq/1; K+ 0.01 meq/1; Ca2+ 0.68 meq/1; Mg2+ 0.26 meq/1; dissolved O2 5.8 ± 0.3 mg/1; free CO2 3.2 ± 0.4 mg/1; T= 24.3 ± 0.1°C. The 1st, 2nd and 3rd gills were subsequently processed for LM (methacrylate), TEM and SEM respectively.Three changes involving chloride cells were correlated with increasing acidity: 1) the appearance of apical pits (figs. 2,5 as compared to figs. 1, 3,4) in chloride cells (about 22% of the chloride cells had pits at pH 5.0); 2) increases in their numbers and 3) increases in the % of these cells in the epithelium of the secondary lamellae.

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