scholarly journals Reproductive response of Pelibuey sheep to the application of recombinant bovine somatotropin and a metabolic restorative preparation

2018 ◽  
Vol 53 (12) ◽  
pp. 1392-1398
Author(s):  
Silvia Fraire-Cordero ◽  
Paulino Pérez Rodríguez ◽  
Ponciano Pérez-Hernández ◽  
César Cortez-Romero ◽  
Jaime Gallegos-Sánchez
Keyword(s):  
Body Weight ◽  
Milk Production ◽  
Post Partum ◽  
Reproductive Activity ◽  
Bovine Somatotropin ◽  
Ovarian Activity ◽  
Weight Changes ◽  
Recombinant Bovine Somatotropin ◽  
Reproductive Response ◽  
Pelibuey Sheep

Abstract: The objective of this work was to evaluate the effect of recombinant bovine somatotropin (rBST) and of the metabolic restorative preparation Metabolase (MR) on the reestablishment of the post-partum ovarian activity of Pelibuey sheep. Ninety-four ewes, with their respective lambs, were randomly assigned to one of the following treatments: T1, continuous suckling (CS); T2, CS + MR; T3, CS + rBST; and T4, CS + MR + rBST. Ovulating percentages, weight changes in ewes and lambs, incidence of estrus, onset and return to estrus, calving, fecundity, and prolificacy were evaluated. The highest ovulation percentages were recorded for CS in T1 and T2, and the lowest ones for rBST in T3 and T4. The treatments had a significant effect on lamb weight. Ewes in T3 had the lowest incidence of estrus (52.9%), besides a greater onset (26.8±1.9 hours) and return to estrus (66.6%). Calving (86.2%) and fecundity (1.8±0.2) were significantly higher in T2. The application of rBST in ewes increases lamb body weight, due to increased milk production, but affects negatively post-partum reproductive activity due to the loss of ewe body weight.

Post-partum blood leptin concentrations and energy balance in first calving dairy heifers

2002 ◽  
Vol 2002 ◽  
pp. 91-91
Author(s):  
A.R.G. Wylie ◽  
D.J. Devlin ◽  
T.W.J. Keady ◽  
C.S. Mayne ◽  
R.E. Agnew ◽  
...  
Keyword(s):  
Energy Balance ◽  
Post Partum ◽  
Reproductive Activity ◽  
Negative Energy ◽  
Energy Output ◽  
Ovarian Activity ◽  
Blood Concentrations ◽  
Dairy Heifers ◽  
Gnrh Release ◽  
Fat Stores

Blood concentrations of leptin, the first of several recently-discovered adipocyte proteins, putatively signal the extent of fat energy reserves to the hypothalamus in mammals and help regulate food intake and reproductive activity (through control of GnRH release). In early post-partum dairy cows, the rapidly increasing milk energy output and slowly increasing feed energy intake produce a negative energy balance (-ve EB) that is met by mobilisation of adipose fat stores and the severity and/or duration of the –ve EB may delay resumption of normal ovarian activity. The objective of the current study was to compare post-partum EB and serum leptin concentration profiles in Holstein-Friesian and Norwegian Red heifers, both of high genetic merit within their breed.

Effects of cooling and supplemental recombinant bovine somatotropin on diet digestibility, digestion kinetics and milk production of cross-bred Holstein cattle in the tropics

2009 ◽  
Vol 148 (2) ◽  
pp. 233-242 ◽  
Author(s):  
W. CHANCHAI ◽  
S. CHANPONGSANG ◽  
N. CHAIYABUTR
Keyword(s):  
Milk Production ◽  
Dry Matter ◽  
Feed Utilization ◽  
Bovine Somatotropin ◽  
Holstein Cattle ◽  
Passage Rate ◽  
Recombinant Bovine Somatotropin ◽  
Ad Libitum ◽  
Digesta Passage ◽  
Digestion Kinetics

SUMMARYThe aim of the current study was to determine how cooling and supplemental recombinant bovine somatotropin (rbST) affect body function with respect to digestion kinetics, digestibility and other variables relevant to milk production in cross-bred Holstein cattle. Ten primiparous cross-bred dairy cattle (0·875 Holstein Friesian×0·125 Red Shindi) were used and divided into two groups of five animals each that were housed in a normal shaded barn (NS barn; non-cooled cows) and in a shaded barn with mist-fan cooling (MF; cooled cows). The cows in each group were supplemented with rbST in early, mid and late stages of lactation with three consecutive subcutaneous injections of 500 mg rbST every 14 days. All cows were fed the same total mixed ration twice daily at approximately 1·1 of assumed ad libitum intake and water was offered ad libitum. During the experimental periods, values of ambient temperatures and temperature humidity index (THI) in the NS barn were significantly higher than in the MF barn, whereas the relative humidity in the MF barn was significantly higher than in the NS barn (P<0·01). The respiration rate and rectal temperature were significantly higher for non-cooled cows than for cooled cows during the daytime whether there was or was not rbST supplementation. Supplementation of rbST for either cooled or non-cooled cows significantly increased dry matter intake (DMI), the efficiency of feed utilization and milk yields (P<0·05). Digesta kinetics using chromic oxide as an external marker showed a high digesta passage rate constant and low mean retention time of digesta in cows either by cooling or supplementation of rbST, whereas no changes were seen for the digestibility of dry matter (DM), organic matter (OM), crude protein (CP), neutral detergent fibre (NDF) and acid detergent fibre (ADF). The half-time of Cr2O3 in the whole digestive tract of cooled cows was lower than those of non-cooled cows and significantly decreased (P<0·05) during rbST supplementation in both groups in all stages of lactation. The magnitude of responses for the digesta passage rate and efficiency of feed utilization were larger in animals supplemented with rbST than in animals under MF cooling only.The main effect of cooling and supplemental rbST was to improve digestion by an increase in the rate of passage of digesta and in turn an increase in feed intake. Digestibility was not influenced by changes in passage rate of digesta either by cooling or rbST supplementation. Milk production in response to rbST supplementation is probably enhanced with cooling. The increased milk production induced by rbST supplementation was mediated by increased efficiency of feed utilization without changes in diet digestibility.

Effect of post-partum levels of nutrition on productivity of 2-year-old heifers

1988 ◽  
Vol 47 (1) ◽  
pp. 59-64 ◽  
Author(s):  
J. C. Whittier ◽  
D. C. Clanton ◽  
G. H. Deutscher
Keyword(s):  
Milk Production ◽  
Nutrient Intake ◽  
Research Council ◽  
Post Partum ◽  
National Research Council ◽  
Weight Changes ◽  
Visual Condition ◽  
Treatment Groups ◽  
Production Growth ◽  
Feeding Systems

AbstractForty crossbred heifers, mated to one sire, that calved in a 20-day period were used to study the effect of varying time and level of post-partum nutrition on productivity. Heifers were individually fed for 90 days post partum beginning at parturition: (1) proportionately 1·3 National Research Council (NRC) 1984 recommendations for 45 days followed by 0·7 NRC for 45 days (130·70); (2) 1·0 NRC for 90 days (100·100); and (3) 0·7 NRC for 45 days followed by 1·3 NRC for 45 days (70·130). Milk production, growth and body condition were estimated periodically during the lactation. The 130·70 heifers maintained their weight during the first 45 days of lactation, while the 100·100 and the 70·130 heifers lost weight (−0·33 and 0·60 kg/day, respectively). During the second 45-day period, the 100·100 and 70·130 heifers gained weight (0·24 and 0·72 kg/day, respectively) while the 130·70 heifers lost weight (−0·39 kg/day). Visual condition scores paralleled weight changes during both phases of the feeding period. Milk production varied according to nutrient intake and treatment differences were greatest at 45 days post partum (8·1, 7·3 and 6·1 kg/day for 130·70, 100·100 and 70·130, respectively). Calf weight gains were unaffected by dam nutrition. Days to first oestrus, days to conception or services per conception were not significantly different (P > 0·05) among treatment groups. Based on this experiment, neither of the alternate feeding systems resulted in decreased performance when compared with feeding at a constant level. Therefore, it appears that latitude exists in the way heifers can be fed early in their first lactation, without adversely affecting production.

Effect of genetic merit on postpartum follicular development, milk production, body weight and, insulin and glucose levels in dairy cows

1998 ◽  
Vol 1998 ◽  
pp. 188-188 ◽  
Author(s):  
S.E.M. Snijders ◽  
K. O'Farrell ◽  
M. P. Boland ◽  
P. Dillon ◽  
M. Diskin ◽  
...  
Keyword(s):  
Body Weight ◽  
Dairy Cows ◽  
Milk Production ◽  
Reproductive Performance ◽  
Body Weight Loss ◽  
Growth Patterns ◽  
Ovarian Activity ◽  
Genetic Merit ◽  
Glucose Levels ◽  
Production Body

Efficient milk production in Ireland in both spring and autumn calving herds is very much dependent on compact calving. This requires an early resumption of ovarian activity, high submission rate, and pregnancy rate to service. Since 1984 there has been an increase in the genetic merit of Irish dairy herds. High genetic merit animals have reduced reproductive performance due to the demands of high milk yield (Nebel and McGilliard, 1993) and the loss of body weight and body condition (Butler and Smith, 1989). However, little comparative data on the reproductive performance of dairy cows of different genetic merit are available. The objective of this study was therefore, to determine the relationship between genetic merit of dairy cows and follicular growth patterns, milk production, body weight loss, insulin and glucose levels in early lactation.

Energy balance in transition cows and its association with health, reproduction and milk production

2015 ◽  
Vol 43 (06) ◽  
pp. 341-349 ◽  
Author(s):  
T. Nakao ◽  
M. Hoedemaker ◽  
C. Furken
Keyword(s):  
Dairy Cows ◽  
Milk Production ◽  
Body Condition ◽  
Transition Period ◽  
Body Condition Score ◽  
Post Partum ◽  
Loose Body ◽  
Ovarian Activity ◽  
Subclinical Ketosis ◽  
Time Periods

SummaryObjective: It was the purpose of this study to determine the effects of non-esterified fatty acids (NEFA) concentrations at different time periods of the transition period as well as lactation number on metabolism, health, reproduction and milk production in dairy cows. Material and methods: This trial was conducted in a single dairy herd located in Northern Germany. Of the herd, which comprised 330 lactating Holstein cows housed in a free stall barn and fed a total mixed ration (TMR), 83 primiparous and multiparous cows were randomly selected. Animals were checked for body condition score (BCS), locomo tion score, calving data, quality of colostrum, reproductive measures, daily rectal temperature of the first 10 days post-partum (p. p.), health data and culling rates up to 200 days in milk (DIM) as well as milk production until 305 DIM. Three different time periods were considered: 3 and 1 week ante partum (a. p.); partus and 1 week p. p.; 3 weeks p. p. Results: Animals with NEFA concentrations 0.4 mmol/l ante partum had a higher risk of no ovarian activity in week 5 p. p. and of subclinical ketosis post partum than cows with lower NEFA concentrations (p < 0.05). Cows with NEFA concentrations 1.1 mmol/l in week 1 p. p., in comparison to those with lower NEFA concentrations, showed a higher prevalence of clinical ketosis (24.1% vs. 5.9%), subclinical ketosis (62.1% vs. 34.0%) and culling rate within 200 DIM (34.5% vs. 14.0%) (p < 0.05). Cows with NEFA concentrations 0.3 mmol/l at week 3 p. p. had higher 100- and 305-day milk yields than cows with lower NEFA concentrations (p < 0.05). First lactating heifers were at higher risk to loose body condition ante partum, of dystocia, fever within the first 10 DIM, metritis, clinical and subclinical ketosis as well as to develop a disease within the first 30 DIM (p < 0.05). Multipara were more likely to loose body condition after calving, to a prolonged calving to first service interval and to higher milk yields (p < 0.05). Conclusion: In conclusion increased NEFA concentrations during the transition period as well as parity can have an influence on health, production and reproduction of dairy cows.

Some Factors Affecting Milk Production and Post Partum Body Weight of Fat-Tailed Norduz Ewes in Turkey

2005 ◽  
Vol 27 (2) ◽  
pp. 125-127
Author(s):  
Mehmet Bingöl ◽  
Turgut Aygün ◽  
Özdal Gökdal ◽  
Ayhan Yilmaz
Keyword(s):  
Body Weight ◽  
Milk Production ◽  
Post Partum ◽  
Factors Affecting
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