Thyroid activity in a hypometabolic primate, the owl monkey (Aotus trivirgatus).
Serum levels of triiodothyronine (T3) and tetraiodothyronine (T4) were significantly lower in owl monkeys than in long-tailed macaques. These observations were considered to be consistent with the lower metabolic rate of the owl monkey. However, the absence of a significant difference in the levels of thyroid stimulating hormone (TSH) between the two species suggested a lower thyroid sensitivity to TSH in the owl monkeys. There was an inverse relation between levels of T3 and TSH in the owl monkeys at night and during the day.
D000818:Animals; D001029:Aotus trivirgatus / Q000097:blood*; D002940:Circadian Rhythm; D005260:Female; D013006:Growth Hormone / Q000097:blood; D000882:Haplorhini / Q000097:blood*; D008252:Macaca fascicularis / Q000097:blood; D008297:Male; D013045:Species Specificity; D013961:Thyroid Gland / Q000502:physiology*; D013972:Thyrotropin / Q000097:blood*; D013974:Thyroxine / Q000097:blood*; D014284:Triiodothyronine / Q000097:blood*
D014284:Triiodothyronine; D013972:Thyrotropin; D013006:Growth Hormone; D013974:Thyroxine