Melatonin suppresses the plasma calcium level in female goldfish during the late and post-reproductive stages. - Maruyama, Yusuke; Watanabe, Kazuki; Matsuoka, Risa; Kuroda, Kohei; Matsubara, Hajime; Suzuki, Nobuo; Hattori, Atsuhiko; Hirayama, Jun (Scientific Reports, 2025)