Bay-Delta Fish Monitoring (IMAGE) NOAA Fisheries West Coast Region Caption Delta Juvenile Fish Monitoring Program biologists count, measure, and collect tissue samples from juvenile salmon outmigrating from the San Francisco Bay-Delta. The tissue sample will be analyzed in a genetic laboratory to determine whether juveniles are winter, spring or fall/late-fall Chinook salmon. Credit US Fish and Wildlife Service Usage Restrictions CREDIT: US Fish and Wildlife Service 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.