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