At what age do catfish mature to a state where they are ready to spawn?

• one to two years
  Catfish mature at around three or four years of age, although females may mature sooner and some can take six years. Most catfish are sexually mature once they reach a length of about 12 inches (5 centimeters).
• two to three years
  Catfish mature at around three or four years of age, although females may mature sooner and some can take six years. Most catfish are sexually mature once they reach a length of about 12 inches (5 centimeters).
• three to four years
  Catfish mature at around three or four years of age, although females may mature sooner and some can take six years. Most catfish are sexually mature once they reach a length of about 12 inches (5 centimeters).