Effects of temperature on somatic growth, otolith growth, and uncoupling in the otolith to fish size relationship of larval northern pike, Esox lucius L

•Pike larvae were reared from eggs in RAS systems for 28 days in 10, 15, and 22 °C.•Temperature have substantial positive effect on growth rate of pike larvae.•The growth rate of larvae may excide 1 mm·d−1 in 22 °C during first month of life.•The growth rate of sagittae and lapilli accurately reveal somatic growth.•Temperature and somatic growth affect the otolith size-fish size relationship.