Effects of zeranol on serum concentrations of growth hormone, IGF-I and metabolites and on carcass composition of lambs fed at two levels of intake /
(12 mg) at 30-d intervals and fed at two levels of feed
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1995.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | (12 mg) at 30-d intervals and fed at two levels of feed (P <.001), plasma glucose (P <.05), mean serum growth < .06) feed to gain (45%), percentage carcass ash (12%), and <.05) daily fat gain (40%) and CP gain (32%) but increased (P access to feed. Lambs with ad libitum and restricted access administration of zeranol alters the GH-IGF-I axis regulation amplitude (P < .05), and insulin-like growth factor-I (IGF-1; arrangement of treatments. Restricted fed lambs were fed to at two levels of feeding: Lambs were implanted with zeranol by 16%. These results indicate that continuous by 20 (P <.05) and 17% (P < .03), respectively. Carcass fat carcass protein by 33%(P<.10). Restricted feeding reduced (P composition and metabolite concentrations in blood when fed dressing percentage (9%). Zeranol increased pituitary weight Forty crossbred wether lambs (average initial weight = 30 kg) gain 50% of body weight gained by lambs allowed ad libitum hormone (GH; P < .05), baseline GH (P < .05), GH pulse however, there was no difference in daily fat gain (g/d) in implanted vs non implanted lambs. Yet zeranol increased intake (restricted and ad libitum) in a 2 x 2 factorial of growth and carcass composition in lambs. P < .00 1) levels by 40%, 13 %, 42%, 7 1 %, 33%, and 53%, percentage tended to be reduced by 7.4% in implanted lambs, respectively. Restricted feeding reduced(P<.10)serum IGF-I to feed were slaughtered after 98 and 154 d, respectively. were used to determine the effects of zeranol on carcass Zeranol increased average daily gains (ADG) and gain to feed |
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| Item Description: | "Major subject: Nutrition". Vita. |
| Physical Description: | viii, 52 leaves : illustrations ; 28 cm. Also available online. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references. |