DAO prepress abstract  -  DOI: https://doi.org/10.3354/dao03187

Buoyancy disorders in pet axolotls Ambystoma mexicanum: three cases

Yoshinori Takami, Yumi Une*

*Email: une@azabu-u.ac.jp

ABSTRACT: As far as we are aware, there are no reports on the pathologic conditions of buoyancy disorders in Ambystoma mexicanum. Herein, we describe various clinical test results, clinical outcomes, and the pathological findings of an experimental pneumonectomy procedure in three A. mexicanum exhibiting abnormal buoyancy. The three pet A. mexicanum were adults, and their respective ages and body weights were 1, 5, and 6 years and 48, 55, and 56 g. Two of these cases were confirmed to have free air within the body cavity via radiographic examination, and all three cases were found to have an acoustic shadow within the body cavity via ultrasonography, and they were diagnosed with pneumocoelom. Lung perforations were detected macroscopically in two of the cases, and all three cases had fibrosis in the ends of the lungs. Removal of the lung lesions eliminated the abnormal buoyancy in all three cases. We concluded that air had leaked into the body cavity from the lungs, and we propose that lung lesions are an important cause of buoyancy disorders in A. mexicanum