태반성 성선자극 호르몬(Human chorionic gonadotropin) 처리에 의한 미꾸라지의 산란 유도 및 연중 다산란 유도를 위한 연구

Abstract

Effects of intraperitonial infections of human chorionic gonadotropin (HCG) on ovulation and spawning of the loach, Misgurnus mizolepis, were investigated. Matured females were spawned successfully by a single does of 6 IU (HCG) per g body weight. Spawning was usually occurred 13 to 25 hours after hormone injection. Most of the eggs were fertilized and hatched normally. Fertilization rate, haching percentage and pseudogonadosomatic index were not correlated with increasing HCG doses. For the study of multiple spawning of this fish, fatness, hepatosomatic and gonadosomatic indices of artificially spawned females were checked for 42 days after first spawning. According to this result, females could spawning again 40 days after first spawning.