title: Testicular metamorphosis and prolongation of spermatogenesis in starlings (Sturnus vulgaris) in the absence of daily photostimulation.
mesh_terms: D000818:Animals; D001717:Birds / Q000502:physiology*; D002940:Circadian Rhythm; D003624:Darkness; D008027:Light; D008297:Male; D010775:Photic Stimulation; D013091:Spermatogenesis; D013737:Testis / Q000033:anatomy & histology / Q000254:growth & development / Q000502:physiology*