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Photoperiodic control of endocrine function of the gonads in silver foxes and its alteration during domestication



Photoperiodic control of endocrine function of the gonads in silver foxes and its alteration during domestication



Zhurnal Evolyutsionnoi Biokhimii i Fiziologii 24(2): 176-183



Studies have been made on the level of estradiol and progesteron in domesticated and undomesticated female silver foxes under different photoperiodic regime. The duration of the "light.sbd.darkness" cycle was equal to 24 h. Total duration of the light period was equal to 9 1/2 h; illumination was natural for 7 h, being artificial for the rest 2 1/2 h in a dark part of a day. It was demonstrated that additional illumination affects the hormonal level and sexual activity, the effect being dependent on the particular time of illumination. Nocturnal illumination significantly increased the level of sex hormones in the blood, domesticated animals being more sensitive as compared to undomesticated ones.

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Accession: 006111338

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