Effects of level and source of dietary selenium on maternal and fetal body weight, visceral organ mass, cellularity estimates, and jejunal vascularity in pregnant ewe lambs1

2008 ◽  
Vol 86 (4) ◽  
pp. 890-901 ◽  
Author(s):  
T. L. Neville ◽  
M. A. Ward ◽  
J. J. Reed ◽  
S. A. Soto-Navarro ◽  
S. L. Julius ◽  
...  
Keyword(s):  
Body Weight ◽  
Visceral Organ ◽  
Dietary Selenium ◽  
Organ Mass ◽  
Pregnant Ewe

Effect of rate of body weight gain of steers during the stocker phase. II. Visceral organ mass and body composition of growing-finishing beef cattle

2013 ◽  
Vol 91 (5) ◽  
pp. 2355-2366 ◽  
Author(s):  
E. D. Sharman ◽  
P. A. Lancaster ◽  
C. P. McMurphy ◽  
G. G. Mafi ◽  
J. D. Starkey ◽  
...  
Keyword(s):  
Body Composition ◽  
Body Weight ◽  
Weight Gain ◽  
Beef Cattle ◽  
Phase Ii ◽  
Body Weight Gain ◽  
Visceral Organ ◽  
Organ Mass ◽  
Finishing Beef Cattle

Influence of pregnancy on body weight, ruminal characteristics, and visceral organ mass in beef heifers.

2001 ◽  
Vol 79 (9) ◽  
pp. 2481 ◽  
Author(s):  
A N Scheaffer ◽  
J S Caton ◽  
M L Bauer ◽  
L P Reynolds
Keyword(s):  
Body Weight ◽  
Visceral Organ ◽  
Beef Heifers ◽  
Organ Mass

Effects of feeding different levels of chromium-enriched live yeast in hairy lambs fed a corn-based diet: effects on growth performance, dietary energetics, carcass traits and visceral organ mass

2013 ◽  
Vol 53 (4) ◽  
pp. 308 ◽  
Author(s):  
A. Estrada-Angulo ◽  
Y. S. Valdés ◽  
O. Carrillo-Muro ◽  
B. I. Castro-Perez ◽  
A. Barreras ◽  
...  
Keyword(s):  
Growth Performance ◽  
Dry Matter ◽  
Carcass Traits ◽  
Dry Matter Intake ◽  
Longissimus Muscle ◽  
Visceral Organ ◽  
Muscle Area ◽  
Organ Mass ◽  
Different Levels ◽  
Live Yeast

Forty Pelibuey × Kathdin lambs (35.5 ± 0.4 kg) were used in a 56-day feeding experiment to assess the effects of feeding different levels of chromium-enriched live yeast (Cr-YC) on growth performance, dietary energetics, carcass traits and visceral organ mass. The Cr-YC source contained 5.5 × 109 colony forming units (CFU) and 0.40 mg of Cr per gram. Treatments consisted of a dry rolled corn-based finishing diet supplemented with 0, 1, 2 or 3 g Cr-YC/lamb.day. Total daily dosages were: 5.5 × 109 CFU and 0.4 mg; 1.1 × 1010 CFU and 0.8 mg Cr, and 1.65 × 1010 CFU and 1.2 mg Cr for supplementation levels of 1, 2 or 3 g Cr-YC/lamb.day, respectively. There were no treatments effects on dry matter intake. As the level of Cr-YC supplementation increased, average daily gain, gain to feed and dietary net energy were linearly increased, and observed/expected dry matter intake was linearly decreased. Chromium-enriched live yeast supplementation increased empty bodyweight (EBW), gastrointestinal fill and full viscera weight, but did not influence organ weights as a proportion of EBW (g/kg EBW). Cr-YC level did not affect carcass length, backfat thickness, kidney, pelvic and heart fat or body wall thickness, but increased hot carcass weight and longissimus muscle area. In general, treatment effects on percentage yield of wholesale cuts (tissue weight as a percentage of cold carcass weight) were small. However, Cr-YC decreased percentage flank. Chromium-enriched yeast supplementation enhances growth rate, longissimus muscle area, and dietary energetic efficiency in finishing feedlot lambs.

THYROID FUNCTION IN THE FOETAL LAMB DURING THE LAST THIRD OF GESTATION

1973 ◽  
Vol 58 (3) ◽  
pp. 535-546 ◽  
Author(s):  
P. W. NATHANIELSZ ◽  
R. S. COMLINE ◽  
MARIAN SILVER ◽  
A. L. THOMAS
Keyword(s):  
Body Weight ◽  
Thyroid Function ◽  
Maternal Plasma ◽  
Maternal Circulation ◽  
Foetal Circulation ◽  
Unit Body Weight ◽  
Intravascular Catheters ◽  
Pregnant Ewe ◽  
Foetal Lamb

SUMMARY Foetal plasma thyroxine levels as well as thyroxine turnover and placental permeability to this hormone were investigated in the conscious pregnant ewe with foetal and maternal intravascular catheters. Foetal plasma thyroxine levels ranged from 4·6 to 6·2 μg/100 ml between 103 days of gestation and the day of birth. Maternal plasma thyroxine levels varied between 2·3 and 4·1 μg/100 ml over the same period. The maternal: foetal ratio across the placenta for thyroxine varied from 0·52 to 0·65. Distribution of radioactive thyroxine injected into the foetal or maternal circulation demonstrated the impermeability of the placenta to thyroxine. Maternal to foetal ratios for labelled thyroxine were 6·2 to 11·9 when injected into the maternal circulation and 0·013 to 0·003 when injected into the foetal circulation. The sheep placenta appears to be capable of actively transporting iodide to maintain a foetal to maternal iodide ratio of up to 8:1. Foetal thyroxine utilization was of the same order at 111 days of gestation as immediately before parturition when expressed per unit body weight. Utilization of thyroxine per kg by the foetus was about five times that of the mother. Various factors which influence thyroid function are discussed and the activity of the foetal pituitary—thyroid system is compared with other foetal endocrine systems.

Estradiol-17β and linseed meal interact to alter visceral organ mass and hormone concentrations from ovariectomized ewes

2009 ◽  
Vol 37 (3) ◽  
pp. 148-158 ◽  
Author(s):  
M.R. O’Neil ◽  
G.P. Lardy ◽  
M.E. Wilson ◽  
C.O. Lemley ◽  
L.P. Reynolds ◽  
...  
Keyword(s):  
Linseed Meal ◽  
Visceral Organ ◽  
Organ Mass ◽  
Estradiol 17Β
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