Rose F L, Harshbarger J C
Science. 1977 Apr 15;196(4287):315-7. doi: 10.1126/science.847473.
Tiger salamanders (Ambystoma tigrinum) inhabiting a sewage sedimentation lagoon become neotenic, and approximately one-third develop neoplastic skin lesions including cancer. Circumstances suggest a chemical etiology for the neoplasms.
栖息在污水沉淀池中的虎螈(钝口螈属虎螈种)会出现幼态持续现象,约三分之一的虎螈会出现包括癌症在内的皮肤肿瘤病变。种种情况表明这些肿瘤的病因是化学因素。