title: Seasonal cycles in melatonin synthesis by the pineal gland as related to testicular function in the house sparrow (Passer domesticus).
mesh_terms: D000818:Animals; D001717:Birds / Q000502:physiology*; D008027:Light; D008297:Male; D008550:Melatonin / Q000096:biosynthesis*; D008780:Methyltransferases / Q000378:metabolism; D009929:Organ Size; D010870:Pineal Gland / Q000201:enzymology / Q000378:metabolism*; D011830:Radiation Effects; D012621:Seasons; D013737:Testis / Q000033:anatomy & histology / Q000254:growth & development / Q000502:physiology* / Q000528:radiation effects; D013739:Testosterone / Q000494:pharmacology; D014166:Transferases / Q000378:metabolism*
chemical_list: D013739:Testosterone; D014166:Transferases; D008780:Methyltransferases; D008550:Melatonin