This Canadian research found that smallmouth bass, played to exhaustion by anglers, took four times longer to return to protect their nesting young. This left the offspring open to attack from predators.
"Smallmouth bass were hooked and then played either briefly (<20s) or to exhaustion (2 min)."
"Fish played to exhaustion took four times longer to return to their nests than did fish played briefly. As a result, offspring in the nests of fish played to exhaustion were exposed to more predation risk. The physiological and behavioral effects of exhaustive exercise induced by angling indicate the potential for catch-and-release angling of smallmouth bass during their spawning season to negatively affect reproductive success."