Oocyte atresia and reproductive success in fathead minnows (Pimephales promelas) exposed to acidified hardwater environments

1989 ◽  
Vol 18 (1-2) ◽  
pp. 207-214 ◽  
Author(s):  
J. Howard McCormick ◽  
Gertrude N. Stokes ◽  
Roger O. Hermanutz
Keyword(s):  
Reproductive Success ◽  
Pimephales Promelas ◽  
Fathead Minnows

scholarly journals Waterborne 17α-Ethynylestradiol Affects Aggressive Behaviour of Male Fathead Minnows (Pimephales promelas) under Artificial Spawning Conditions

2002 ◽  
Vol 37 (4) ◽  
pp. 697-710 ◽  
Author(s):  
Andrew R. Majewski ◽  
Paul J. Blanchfield ◽  
Vince P. Palace ◽  
Kerry Wautier
Keyword(s):  
Treatment Group ◽  
Reproductive Success ◽  
Low Dose ◽  
Nest Site ◽  
Pimephales Promelas ◽  
High Dose ◽  
Fathead Minnows ◽  
Exposed Fish ◽  
Solitary Males ◽  
Dose Experiment

Abstract Among fishes, courtship behaviour and nesting defense are strong predictors of reproductive success. We conducted three experiments to assess the impacts of exposure to 17α-ethynylestradiol (EE2) on the ability of male fathead minnows (Pimephales promelas) to establish and defend a spawning territory. Fish were exposed to EE2 (2 or 8 ng L-1) for 27 days, while spawning conditions were gradually optimized. Control (ethanol only) males (C) were paired with treated males (L = low dose, H = high dose) (experiment 1) or individuals from their own treatment group (experiment 2) in competition for a nest site. Solitary males occupied a nest site prior to adding a second male from the same treatment group in experiment 3. Behaviour was quantified from video records. Exposure to EE2 impaired a male's ability to compete and acquire territories compared to unexposed individuals (experiment 1), but was similar when males were paired with like-treated conspecifics (experiments 2 and 3). Higher levels of overall aggression (aggression rates of both fish) occurred in Cvs.L and Cvs.H than Cvs.C trials (experiment 1). Induction of vitellogenin was significantly higher in exposed fish relative to controls.

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.

Acidification effects on macroinvertebrates and fathead minnows (Pimephales promelas) in outdoor experimental channels

1983 ◽  
Vol 17 (1) ◽  
pp. 47-63 ◽  
Author(s):  
James A. Zischke ◽  
John W. Arthur ◽  
Kathleen J. Nordlie ◽  
Roger O. Hermanutz ◽  
Douglas A. Standen ◽  
...  
Keyword(s):  
Pimephales Promelas ◽  
Fathead Minnows

INFLUENCE OF MULTIPLE WATER-QUALITY CHARACTERISTICS ON COPPER TOXICITY TO FATHEAD MINNOWS (PIMEPHALES PROMELAS)

2004 ◽  
Vol 23 (12) ◽  
pp. 2900 ◽  
Author(s):  
Katherine L. Sciera ◽  
J. Jeffery Isely ◽  
Joseph R. Tomasso ◽  
Stephen J. Klaine
Keyword(s):  
Water Quality ◽  
Pimephales Promelas ◽  
Copper Toxicity ◽  
Quality Characteristics ◽  
Fathead Minnows
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