Figure 2.2 from The population ecology of fathead minnows (Pimephales promelas) in estrogen contaminated environments

Figure 2.2. Effect of 17α-Ethinylestradiol (EE2) on the male fathead minnow (Pimephales promelas) gonad and effects on secondary sex characteristics. In the control testis (A) arrows outline spermatozoa in the sperm duct indicating normal development. However, life-time exposure to 5.3 - 10.8ng/L EE2 (B) induced the abnormal testis-ova condition (arrows). Normal secondary sex characteristics are represented in the control fish (C), altered sex characteristics are shown in males exposed to 3.2 - 5.3ng/L EE2 (D) and 5.3 - 10.8ng/L EE2 (E). Shown for comparison is a control female (F). Pictured fish are representative of all fish in the treatment (CF). Hematoxylin and Eosin, bars = 250 µm in A&B. Bars = 1 cm in C-F. - "The population ecology of fathead minnows (Pimephales promelas) in estrogen contaminated environments"

Figure 2.2 from The population ecology of fathead minnows (Pimephales promelas) in estrogen contaminated environments

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Figure 2.2 from The population ecology of fathead minnows

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Figure 2.2 from The population ecology of fathead minnows (Pimephales promelas) in estrogen contaminated environments

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Figure 2.2 from The population ecology of fathead minnows