About winter, the eggs hatch into really tiny salmon called alevin which even now have their yolk sac hooked up. Alevins stay close to the redd for your few months hiding from predators during the spaces in between gravel. For the duration of this phase they take in the yolk https://jaredzlhtd.blogsumer.com/30441741/the-5-second-trick-for-glazed-fresh-atlantic-salmon