AMMAN, Jordan — Thirty-seven Islamist and other government critics were victorious in parliamentary elections that were boycotted, injecting a degree of dissent into Jordan’s newly empowered Parliament. The king has portrayed the assembly as a centerpiece of his reform package, but the opposition says it’s not enough and vowed Thursday to stage more street protests.

Initial results released Thursday showed the Islamists — who are not linked to the fundamentalist Muslim Brotherhood — and other opposition figures winning more than 25 percent of the 150-seat Parliament, in sharp contrast to the outgoing legislature, which was almost entirely composed of the king’s supporters.