Thyon RujirekagulwatSara E. HugginsMahidol University2018-04-192018-04-191975-01-01General Pharmacology. Vol.6, No.2-3 (1975), 133-140030636232-s2.0-49549145998https://repository.li.mahidol.ac.th/handle/20.500.14594/108251. Serotonin content and concentration for brains of 3-4 year-old crocodiles were determined to be 3·360±0·694 μg and 0·731±0·078 μg/g respectively. 2. No sex-related differences were noted but animals killed in October showed higher concentrations than those killed in other months. 3. Small animals (1 month old) had higher concentrations, 1·481±0·064 μg/g than did the older animals. 4. Highest regional concentrations were found in the cerebrum (1·023±0·362 μg/g) followed in descending order by diencephalon, midbrain tegmentum, midbrain tectum, medulla, pons, cerebellum, and olfactor bulb. © 1975.Mahidol UniversityPharmacology, Toxicology and PharmaceuticsArticleSCOPUS10.1016/0306-3623(75)90044-0