Efek Kuning Telur Puyuh sebagai Krioprotektan Alami terhadap Kualitas Spermatozoa Ikan Kancra (Tor soro Valenciennes, 1842) Pascakriopreservasi = The Effect of Quail Egg Yolk as Natural Cryoprotectant for The Quality of Kancra Fish (Tor soro Valenciennes, 1842) Spermatozoa Post-cryopreservation.