Darwinian fitness

Darwinian fitness refers to an organism’s ability to survive and reproduce successfully in its environment. It doesn’t just mean strength or speed, but how well an individual’s traits help it find resources, avoid predators, and produce offspring who can also survive and reproduce. Traits that improve these chances become more common over generations. Essentially, fitness measures how well an organism is adapted to its surroundings and how effectively it passes its genes to future generations. It’s a key concept in understanding evolution and how species change over time.