Temperature dependency equation for chub mackerel (Scomber japonicus) identified by a laboratory rearing experiment and microscale analysis

In this study, juveniles of chub mackerel (Scomber japonicus) were reared from eggs in six different temperature treatments, and their otoliths were subjected to micromilling and microvolume stable oxygen isotope (δ18O) analysis. We determined the δ18O values of otoliths (δ18Ootolith) formed at mean temperatures of 16.3, 17.6, 18.3, 20.0, 24.0 and 26.5°C and identified a linear relationship between rearing water temperature (T, °C) and δ18Ootolith as follows: δ18Ootolith (VPDB) – δ18Owater (VSMOW) =–0.25 (±0.01)T+4.46 (±0.21) (R2=0.96, P