Stoimenow's unknotting-number conjecture for positive fibered knots

Let $K$ be a positive fibered knot. Its unknotting number is denoted by $u(K)$, and its 3-genus by $g(K)$. Stoimenow's conjecture.

$$u(K)=g(K).$$

The conjecture extends the equality known for braid-positive knots. The paper disproves the conjecture by exhibiting a positive fibered knot whose unknotting number exceeds its genus.