Biomass variation (IMAGE) University of Tokyo Caption The graph on the left shows the change in biomass of the fish studied, i.e., the total weight of each species (unit: 1,000 tons). The graph on the right shows the relationship between the total biomass and individual weight. The red line shows the total biomass of sardine, mackerel and anchovy, while the black line shows the fluctuating and decreasing individual weight. Credit 2024 Zhen and Ito/Fish and Fisheries Usage Restrictions Credit must be given to the creator. License CC BY 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.