Figure 3 (IMAGE) Kobe University Caption A and B: The relationship between the size of fish in fall (October) and the probability of smoltification for the hatchery groups. C and D: Size groupings for fish recaptured from natural streams. In A and B, the vertical dashed line shows the size (=threshold size) at which the probability of smoltification is 50%. Credit Tatsuya Tanaka Usage Restrictions Please credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.