Catch: Then, Now (IMAGE) University of Washington Caption The gray line represents the average trophic level of what was caught worldwide starting in 1950 according to a 1998 Science paper about fishing down the marine food web. Newly revised and updated information, the black line, shows that the average trophic level of what is being caught has, instead, been generally going up since the mid 1980s. Credit Trevor Branch/U of Washington Usage Restrictions Credit required 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.