The Quality of Sperm and Eggs and Their Evaluation Criterions in Fish

One of the most important factors affecting reproduction in fish is the quality of sperm and eggs. therefore, getting information on the quality of sperm and eggs of broodstocks, and their evaluation criterions has a great importance. this review includes information on quality evaluation criterions before fertilization; macroscopic and microscopic examination of sperm, mass movement of sperm, sperm motility, sperm density, dead spermatozoon ratio to alive spermatozoon; examination of physical and chemical characteristics of sperm; fertilization and being inseminated success; determination of alive embryo rates.