Testosterone kills, elevated testosterone really messes you up.
Just ask Floyd Landis...
This darter seem like the orangethroat variant that ceas was describing. Shape is right, body pretty much matches the orangethroats and headwaters I've seen, definitely have orange throats, but color is definitely not your garden variety orangethroat.
As for getting them... wolf creek is packed with these things, and from what Gus said, they're also found in Elkhorn creek, which Wolf creek dumps into. I was surprised at that, as Wolf is so close to a metropolitan area, and they usually pollute the daylights out of a stream, one way or another.
My feeling is - the more people who know about these beautiful little fish, the more people who will support measures to protect them. Most people here in KY don't even know darters exist, except for vague references to 'snail darter' (which is in TN). If only they knew what they were missing.
Lifespan? I have a pair of variegate darters that are almost 2 years old. Looking a bit tired right now, but they were full size when I found them, so who knows how old they are? As I recall, some African killies hatch when the spring rains revive the streams. They live long enough to spawn, then the summer drought dries up the stream and kills them. But the eggs survive.