scholarly journals Effect of Physical Feed Restriction During Rearing on Large White Turkey Breeder Hens: 1. Growth Performance

2002 ◽  
Vol 81 (1) ◽  
pp. 9-15 ◽  
Author(s):  
A.N. Crouch ◽  
J.L. Grimes ◽  
V.L. Christensen ◽  
K.K. Krueger
2002 ◽  
Vol 81 (12) ◽  
pp. 1792-1797 ◽  
Author(s):  
AN Crouch ◽  
JL Grimes ◽  
VL Christensen ◽  
KK Krueger

2002 ◽  
Vol 81 (1) ◽  
pp. 16-22 ◽  
Author(s):  
A.N. Crouch ◽  
J.L. Grimes ◽  
V.L. Christensen ◽  
K.K. Krueger

2017 ◽  
Vol 49 (8) ◽  
pp. 1685-1688
Author(s):  
R. Santos-Ricalde ◽  
E. Gutiérrez-Ruiz ◽  
W. Novelo-Ucan ◽  
P. Martinez-Romero ◽  
J. Segura-Correa

2013 ◽  
Vol 53 (10) ◽  
pp. 1046 ◽  
Author(s):  
A. Akhlaghi ◽  
M. J. Zamiri ◽  
Y. Jafari Ahangari ◽  
M. R. Mollasalehi ◽  
H. Shojaie ◽  
...  

An association between induced maternal hyperthyroidism and a decreased incidence of cold-induced ascites in broiler chickens has been reported recently. There are also reports suggesting that thyroid hormones have an effect on intestine, a high oxygen-demanding organ. The present study aimed to determine whether the ascites-attenuating effect of maternal hyperthyroidism is associated with morphological changes in intestine and with probable adverse effects on growth performance in progeny chicks. Eighty-eight broiler breeder hens were allotted to control or hyperthyroid [HYPER; thyroxine-treated] groups, and artificially inseminated. Hatching eggs (n = 924) were incubated and day-old male chicks (n = 288) were reared for 42 days under standard or low ambient temperature. Plasma thyroxine was higher in the HYPER hens and their embryos at internal pipping. Maternal hyperthyroidism did not adversely affect the feed : gain ratio and carcass weight, whereas cold stress impaired them. A higher relative weight was found at 42 days of age for all intestinal regions at low ambient temperature. The duodenal and jejunal crypt depths (CD) were lower in HYPER group at 7 days of age. Cold exposure decreased the duodenal and jejunal villus height and CD, and increased the ileal goblet cell number at 21 days. On Day 42, higher values were recorded for CD, goblet cell number, and epithelial thickness of different intestinal regions in cold-exposed birds. In conclusion, growth performance was not adversely influenced by maternal hyperthyroidism and its minimal early effect on intestinal morphology does not appear to be the underlying mechanism for decreased incidence of ascites in broilers.


1999 ◽  
Vol 42 (3) ◽  
pp. 281-294
Author(s):  
Y. Toukourou ◽  
K.-J. Peters

Abstract. Title of the paper: Impaet of feed restriction on the growth performance of goat kids The influence of differential feeding levels on growth performance in 72 goat kids "Bunte Deutsche Edelziege" during the pre-weaning period was examined. The 72 animals were assigned to a control group and two experimental groups that received respectively 20% and 40% less milk/less concentrate compared to the control (fed at 2.4 times energy demand for maintenance). The experimental gained animals significantly less relative to the control group. However, during the subsequent realimentation period when all animals were fed at a energy level of 2.4 times maintenance same treatment, the daily weight gain among the kids was in inverse proportion to the level ofmilk deprivation in the pre-weaning phase. The rapid growth among the experimental animals was such that the initial differences in body weight between the experimental and control groups were fully compensated. Growth performance of kids with respect to different levels of concentrated feed was less clear cut and d.ffered significantly only behveen the group that received the lowest feed level relative to all the other groups.


2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 19-19
Author(s):  
Xianyong Ma ◽  
Zhimei Tian ◽  
Yiyan Cui ◽  
Zhichang Liu ◽  
Huijie Lu

Abstract Object: The aim of this experiment was to study the effects of different levels of glutathione (GSH) on growth performance and intestinal health of piglets. Methods: A total of 180 piglets of 21-day-old (Duroc × Landrace × Large White) were randomly divided into 5 groups. The control group was fed a standard diet based on NRC 2012. The treatment group 1 - 4 was supplemented with 50, 100, 200 and 400mg/kg GSH. The experiment lasted 28 days. Results: Compared with the control group, 50mg/kg GSH significantly increased the piglet’s skin and gross color, average daily gain (ADG) and decreased feed gain ratio (F/G) (P < 0.05), while the effect of 100, 200, 400 mg/kg GSH was contrary. The supplementation of 50mg/kg GSH significantly increased the mucosal villi height, the ratio of villous height to crypt depth (VH/CD) and decreased the crypt depth (P < 0.05) in duodenum, jejunum and ileum (P < 0.05), while the effect of 100, 200, 400 mg/kg GSH was contrary; The supplementation of 50mg/kg GSH decreased the concentration of triglyceride in plasma (P < 0.05); The supplementation of 50, 100, 200, 400mg/kg GSH had no effect on the antioxidative indexes of blood, but 400mg/kg GSH increased the activities of T-AOC, GSH, SOD and decreased MDA content in jejunum and ileum; 400mg/kg GSH increased the content of T-SOD in liver (P < 0.05), while 50mg/kg GSH had no effect on SOD, GSH-PX, GSH-SOD in intestine and liver (P > 0.05). 50mg/kg GSH significantly increased T-AOC activity and decreased MDA content in muscle (P < 0.05). Conclusion: Supplementation of 50mg/kg GSH in piglets` diet was the most appropriate and it could significantly improve skin and gross color, growth performance and intestinal mucosal morphology, it also increased the antioxidation ability in muscle of piglets.


2005 ◽  
Vol 84 (3) ◽  
pp. 485-493 ◽  
Author(s):  
J.L. Godwin ◽  
J.L. Grimes ◽  
V.L. Christensen ◽  
M.J. Wineland

2016 ◽  
Vol 56 (10) ◽  
pp. 1593 ◽  
Author(s):  
H. T. Nie ◽  
Z. Y. Wang ◽  
S. Lan ◽  
H. Zhang ◽  
Y. J. Wan ◽  
...  

This study aimed to evaluate the effect of residual feed intake (RFI) phenotype and nutritional treatment interaction on the growth performance, plasma variables and gene expression levels within the somatotropic axis. Growing ewes [n = 52, initial bodyweight (BW) = 17.5 ± 0.5 kg, 2 months of age] were offered ad libitum access to diets for 63 days and ranked based on RFI phenotype. Thirty ewes with the highest and lowest RFI values were selected and randomly assigned to three nutritional treatments based on dry matter intake (DMI), which are ad libitum (AL), low restriction (LR) and high restriction (HR) groups, respectively. Each nutritional treatment group included ewes with high (n = 5) and low RFI (n = 5) values. During nutritional treatment (from Day 64 to Day 138), plasma samples were obtained to measure metabolite and hormone concentrations. Tissues of the hypothalamus, pituitary, liver, and Longissimus dorsi muscle (LM) were harvested at the end of the experiment (Day 138) to measure the gene expression level within the somatotropic axis. Muscle growth hormone receptor mRNA abundance of low RFI ewes tended to be greater (P = 0.09) under AL feeding, but this difference was abolished by underfeeding (P > 0.10). Low RFI ewes under HR treatment showed slightly greater growth performance, which was accompanied with lower pituitary somatostain receptor 2 mRNA abundance (P < 0.05), plasma non-esterified fatty acid concentration (P < 0.05), and greater concentration of triglyceride (P < 0.05), compared with ewes classified as high RFI group. Our results suggested that ewes categorised as low RFI showed higher resistance to the condition of high feed restriction, which might be attributed to less intensity of fat mobilisation under negative energy balance. The mechanism underlying resistance to such feed restriction was presumably through action of somatostain receptor 2 and was potentially mediated by inhibitory effects of somatostatin on growth hormone release but not basal growth hormone secretion.


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