Stone Enrichments (IMAGE) University of Jyväskylä - Jyväskylän yliopisto Caption The research demonstrates that stone enrichments that have been previously conditioned in lake water significantly improve survival of aquaculture fish compared to clean stones. Credit Pekka Hyvärinen/Luke Usage Restrictions None 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.