title: [Cytological State of Gonads and Level of Thyroid and Sex Steroid Hormones in Black Sea Trout Salmo trutta labrax Pall].
abstract: Cytological state of the gonads and hormonal state of hatchery Black Sea trout before differentiation into resident and anadromous forms (parr) at an age of 15 months have been examined. It has been shown that the hormonal changes associated with the choice of life strategy in the Black Sea trout females and males are pronounced to different degrees. As compared with the resident and anadromous individuals; the female parr display a low rate of oogenesis and similar hormonal status, while characteristic of the male parr are an intermediate rate of spermatogenesis, a low level of thyroid hormones and estradiol, and a medium testosterone level. As has been found, the undifferentiated Black Sea trout individuals predominantly develop into the resident form.
authors.forename: E D
authors.initials: ED
authors.lastname: Pavlov
authors.forename: E V
authors.initials: EV
authors.lastname: Ganzha
authors.forename: V V
authors.initials: VV
authors.lastname: Kostin
authors.forename: D S
authors.initials: DS
authors.lastname: Pavlov
mesh_terms: D000818:Animals; D005260:Female; D012739:Gonadal Steroid Hormones / Q000378:metabolism*; D008297:Male; D009866:Oogenesis / Q000502:physiology; D010053:Ovary / Q000166:cytology / Q000378:metabolism; D012474:Salmon / Q000378:metabolism*; D013091:Spermatogenesis / Q000502:physiology; D013737:Testis / Q000166:cytology / Q000378:metabolism; D013963:Thyroid Hormones / Q000378:metabolism*
chemical_list: D012739:Gonadal Steroid Hormones; D013963:Thyroid Hormones