title: Effect of early feed restriction in male broiler chicks on plasma metabolic hormones during feed restriction and accelerated growth.
abstract: 1. Plasma GH was greater (P less than 0.05) on day 12 in ad libitum-fed birds compared to restricted chicks. Conversely, maximum GH levels were found to occur in the nutrient restricted chicks during the period of accelerated growth (day 42). 2. A significant decline in circulating insulin concentrations with advancing age was evident in both ad libitum-fed and restricted chicks. 3. Feed restriction significantly suppressed circulating T3 in restricted chicks, with concentrations returning to control levels upon refeeding. 4. A significant increase in T4 with advancing age was evident in both treatment groups, with T4 being significantly greater in controls compared to restricted chicks at 54 days of age.
authors.affiliation: USDA-Agricultural Research Service, Beltsville Agricultural Research Center, MD 20705.
authors.forename: J P
authors.initials: JP
authors.lastname: McMurtry
authors.forename: I
authors.initials: I
authors.lastname: Plavnik
authors.forename: R W
authors.initials: RW
authors.lastname: Rosebrough
authors.forename: N C
authors.initials: NC
authors.lastname: Steele
authors.forename: J A
authors.initials: JA
authors.lastname: Proudman
mesh_terms: D000367:Age Factors; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D002645:Chickens / Q000097:blood* / Q000254:growth & development; D005215:Fasting; D013006:Growth Hormone / Q000097:blood; D006728:Hormones / Q000097:blood*; D007328:Insulin / Q000097:blood; D008297:Male; D013974:Thyroxine / Q000097:blood; D014284:Triiodothyronine / Q000097:blood
chemical_list: D006728:Hormones; D007328:Insulin; D014284:Triiodothyronine; D013006:Growth Hormone; D013974:Thyroxine