The spawn is taking place on some northeastern wild brook trout streams. I recently fished a brook on consecutive Thursdays, and the changes over the course of a week were dramatic. Seven days ago, there were only a few leaves in the water and no visible signs of spawning activity. A week later, the brook was congested with foliage and several redds were apparent. I spotted a large hen on one, and a few active fish on another.
In case you don’t know, a redd is a spawning bed. The fish select an area with enough water and current and the right size gravel, then clear the area of debris and other sediment before depositing eggs and spreading milt. (This is why spawning and post-spawn fish often present with scraped bellies and frayed fins.) Redds are fairly easy to spot; they look like light colored patches contrasting against much darker substrate. On a small stream, redds may be anywhere from a couple of square feet in area to significantly larger. A distinct light colored patch with fish darting about on the bottom nearby is a sure sign that you’ve discovered a redd.
Maintaining the integrity of redds and protecting spawning fish is vital to the future of any wild trout stream. The stocking truck is not coming to replenish what humans destroy! Here’s what to do if you see a redd: First, leave it and the fish that are near it alone. Don’t try to catch spawning fish. Let nature take its course. Next, make a mental note of the location. Chances are that the fish have been using the general area to spawn for dozens or hundreds or thousands of generations. Finally, stay out of the water near the redd for the remainder of the fall, winter, and early spring. If you crush the eggs or the developing fry, that would be bad.
Besides, it’s pretty cool to simply sit on a rock and watch the beginnings of the next generation of Salvelinus fontinalis.