Fig. 2
Summary of relevant reports on swim bladder-derived materials retrieved from Web of Science (WOS) on the topic, among which the number of review papers is counted (A, January 1, 1900–December 31, 2023). Statistical data of publications per 20-year span containing the words "swim bladder" B or "fish bladder" C and "material" (January 1, 1900–December 31, 2023), and the data between January 1, 2014, and December 31, 2023 (inserted images in B and C)