title: Circannual changes in serum concentrations of thyroxine, calcitonin and parathormone in immature and mature red deer females (Cervus elaphus).
abstract: The aim of this study was to determine circannual changes in the serum concentrations of thyroxine, calcitonin and parathormone in mature and immature red deer females. Blood samples from 8 hinds were collected monthly for 26 months. Secretions of thyroxine and calcitonin showed circannual rhythms with significantly higher levels in the immature hinds compared to the mature animals (p<0.05). For thyroxine, the concentration was higher in the winter/spring period than in summer/autumn (p<0.05), while for calcitonin the concentration profile was the opposite (p<0.05). The concentration of parathormone was significantly higher in summer/autumn that in the other months of the experiment (p<0.01). These results may indicate that the hormones investigated may be involved in the regulation of seasonal reproductive activity and in processes contributing to entering puberty in red deer females.
authors.forename: J
authors.initials: J
authors.lastname: Kuba
authors.forename: B
authors.initials: B
authors.lastname: Błaszczyk
authors.forename: T
authors.initials: T
authors.lastname: Stankiewicz
authors.forename: E
authors.initials: E
authors.lastname: Kwita
authors.forename: J
authors.initials: J
authors.lastname: Udała
mesh_terms: D000818:Animals; D002116:Calcitonin / Q000097:blood*; D003670:Deer / Q000097:blood* / Q000502:physiology; D005260:Female; D010281:Parathyroid Hormone / Q000097:blood*; D011374:Progesterone / Q000097:blood; D012621:Seasons; D012741:Sexual Maturation / Q000502:physiology; D013974:Thyroxine / Q000097:blood*; D013997:Time Factors
chemical_list: D010281:Parathyroid Hormone; D011374:Progesterone; D002116:Calcitonin; D013974:Thyroxine