A qualitative assessment of the Eurasian perch Perca fluviatilis semen describing the basic parameters of seminal plasma was completed. The histological methods used in this study showed changes in perch gonads during a spawning and post-spawning period. At the late period of the spawning season. the structure of testes was clearly loosened and spermatozoa did not fill uniformly all t... https://parisnaturalfoodes.shop/product-category/sytrinol/