Radiodiagnostic examination of the swimbladder of some fish species

Radiodiagnostic methods have not been used previously for studying the anat omy and diseases of the swimbladder of freshwater fish species. In this stu dy, the radiographic anatomy of the swimbladder and species-related differe nces in swimbladder structure were studied on plain radiographs taken of 12 Hungarian fish species of major economic importance. Changes observed by r adiography were also studied by conventional parasitological methods. The r adiodiagnostic method reported here appears to be a useful complement to di agnostic examinations that have been based merely on dissection so far. It enables evaluation of the pathological lesions in live condition, without c ausing damage to the fish.