scholarly journals Genetic Relationships among Body Condition Score, Body Weight, Milk Yield, and Fertility in Dairy Cows

2003 ◽  
Vol 86 (6) ◽  
pp. 2193-2204 ◽  
Author(s):  
D.P. Berry ◽  
F. Buckley ◽  
P. Dillon ◽  
R.D. Evans ◽  
M. Rath ◽  
...  
Keyword(s):  
Body Weight ◽  
Dairy Cows ◽  
Milk Yield ◽  
Body Condition ◽  
Body Condition Score ◽  
Genetic Relationships ◽  
Condition Score

The effect of long-term daily administration of bovine somatotrophin on the performance of dairy cows over a second consecutive lactation

1989 ◽  
Vol 1989 ◽  
pp. 20-20
Author(s):  
R.F. Butterwick ◽  
T.E.C. Weekes ◽  
P. Rowlinson ◽  
D.S. Parker ◽  
D.G. Armstrong
Keyword(s):  
Body Weight ◽  
Dairy Cows ◽  
Milk Yield ◽  
Body Condition ◽  
Feed Intake ◽  
Body Condition Score ◽  
Post Partum ◽  
Reproductive Status ◽  
Condition Score ◽  
Bovine Somatotrophin

The objectives of the trial were to investigate the effects of bovine somatotrophin (BST) from either week 2 or week 10 post-partum on the yields of milk, milk components, body weight, body condition, feed intake, health and reproductive status of dairy cows over a second consecutive lactation. The results from the heifer lactation have been reported previously (Butterwick et al. 1988).17 Friesian dairy cows in their second lactation were continued on the same treatment as in their heifer lactation: daily subcutaneous injection of recombinantly derived bovine somatotrophin (BST;25mg/d) from either week 2 (BST2;n=6) or week 10 (BSTl0;n=5) post-partum, or injection of a buffer solution from week 2 of lactation (C;n=6). Treatments continued until week 42 of lactation or until 60 days prior to predicted calving date, if this occurred before week 42 of lactation. Initially cows were housed in cubicles and fed ad libitum through Calan doors, on a diet consisting of concentrate and grass silage (Table 1) on a 60:40 dry matter ratio. After day 110 of lactation cows were turned out to pasture but continued to receive concentrates according to milk yield and body condition score. Milk yield and feed intake were recorded daily, milk composition, body weight and body condition score were recorded twice weekly. Health and reproductive status were monitored over the lactation.

scholarly journals Effect of dietary-induced increases in circulating insulin concentrations during the early postpartum period on reproductive function in dairy cows

Reproduction ◽  
2002 ◽  
pp. 419-427 ◽  
Author(s):  
JG Gong ◽  
WJ Lee ◽  
PC Garnsworthy ◽  
R Webb
Keyword(s):  
Body Weight ◽  
Dairy Cows ◽  
Milk Yield ◽  
Body Condition ◽  
Reproductive Performance ◽  
Body Condition Score ◽  
Post Partum ◽  
Dietary Treatment ◽  
Genetic Merit ◽  
Selection For

Although it has become increasingly clear that fertility in modern dairy cattle is declining in association with increased milk yields, the underlying mechanism is poorly understood. The first ovulation post partum is delayed in dairy cows undergoing selection for genetic merit for milk yield in association with lower circulating insulin concentrations. The aim of this study was to investigate whether feeding a diet to increase circulating insulin concentrations can overcome this delay in the first ovulation post partum. The experiment was a 2 x 2 factorial design (n = 10 per group) involving diet and genetic merit for milk yield. The dietary treatment started on the day of calving and lasted for 50 days. Plasma samples were collected each day and ovarian ultra-sonography was performed three times a week during the experimental feeding period. Milk yield was recorded each day, and body weight and body condition score were determined each week. Milk samples were collected three times a week from day 50 to day 105 post partum, and reproductive performance data were recorded for all the cows as part of the routine farm practice. The dietary treatment induced significant differences in plasma insulin concentrations in both high and low genetic merit cows. Although high genetic merit cows produced more milk, lost more body weight and had lower body condition scores during the experiment, no significant effect of diet was observed on these measurements. The high insulin inducing diet increased the proportion of cows ovulating within 50 days of calving and reduced the intervals from calving to first ovulation, and tended to reduce the intervals from calving to first service and to conception. These fertility parameters were also more favourable in low than in high genetic merit cows, but no interaction between diet and genetic merit was observed for any of these parameters. Genetic merit, but not diet, also affected the number of services required per conception and the conception rate. In conclusion, these results have confirmed that genetic selection for high milk yield is associated with a decrease in reproductive performance in dairy cows. More importantly, this study has demonstrated that it is possible to alleviate this problem by nutritional manipulation.

Prediction of body weight and composition in lactating dairy cows: Relationship between body condition score and body composition

2005 ◽  
Vol 2005 ◽  
pp. 19-19
Author(s):  
T. Yan ◽  
R. E. Agnew ◽  
C. S. Mayne
Keyword(s):  
Body Composition ◽  
Body Weight ◽  
Dairy Cows ◽  
Milk Production ◽  
Body Condition ◽  
Body Condition Score ◽  
Early Lactation ◽  
Lactating Dairy Cows ◽  
Condition Score ◽  
Body Concentration

Body condition of lactating dairy cows varies at different stages of lactation. Cows usually mobilise their body reserves to provide energy and protein for milk production in early lactation, and gain weight to deposit energy and protein for pregnancy at a later stage. The objective of the present study was to examine relationships between body condition score (CS) and body concentration of lipid, CP and energy.

Leptin interrelationships to energy-related metabolites and hormones in fed and fasted sheep

2002 ◽  
Vol 2002 ◽  
pp. 87-87 ◽  
Author(s):  
A.R.G. Wylie ◽  
D.J. Devlin ◽  
A.J. Bjourson
Keyword(s):  
Body Weight ◽  
Dairy Cows ◽  
Body Fat ◽  
Body Condition ◽  
Previous Investigation ◽  
Body Condition Score ◽  
Backfat Thickness ◽  
Early Lactation ◽  
Weak Correlation ◽  
Condition Score

A review of published leptin data for growing lambs, older ewes and mature dairy cows in late lactation showed that only 0.30-0.37 of the variation in blood leptin concentration was explained by differences in body fat variably expressed as % of liveweight (LW), backfat thickness and body condition score (BCS) respectively (Wylieet al., 2002). In dairy cows between 15d and 226d postpartum, Wylieet al(2002) observed no overall correlation between leptin at slaughter and lipid expressed as % of LW, empty body weight or carcase weight and only a weak correlation in cows in mid-lactation. Losses of fat during early lactation may ‘uncouple’ the link between leptin and fat and produce a bias across all of lactation. Another explanation is that leptin may be more closely linked with lipogenesis than with the amount of stored fat. This study revisits some metabolite and hormone data from a previous investigation of IGF-1 changes in fed, fasted and re-fed sheep in the light of more recently obtained leptin concentrations in the same animals.

Effect of Body Condition Score Variation on Milk Yield and Fertility in Post-partum Dairy Cows

2003 ◽  
Vol 27 ◽  
pp. 647-649 ◽  
Author(s):  
A. Formigoni ◽  
P. Pezzi ◽  
A. Gramenzi ◽  
G. Martino ◽  
E. Neri
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Body Condition ◽  
Body Condition Score ◽  
Post Partum ◽  
Condition Score

scholarly journals Distribution of dominant follicles in postpartum dairy cows

2017 ◽  
Vol 33 (2) ◽  
pp. 181-191
Author(s):  
Benjamin Cengic ◽  
Nazif Varatanovic ◽  
Tarik Mutevelic ◽  
Amel Cutuk ◽  
Ermin Saljic
Keyword(s):  
Dairy Cows ◽  
Corpus Luteum ◽  
Milk Production ◽  
Milk Yield ◽  
Body Condition ◽  
Body Condition Score ◽  
Diagnostic Ultrasound ◽  
Ovarian Activity ◽  
Pathological Effect ◽  
Condition Score

Clinical and subclinical disorders and diseases cause reproductive failures and decline in milk production. Etiology of disorders is mainly because of pathological effect of microorganisms, lapses in nutrition and lodging, as well as in management. After partrition, body is under stress and milk yield is highest, which favors appearance of metabolic and infective diseases. Status of puerperium, number of lactation, body condition score and season of parturition, have highest effect to cyclic ovarian activity. Regular development of dominant follicles, ovulation, formation of corpus luteum and luteolysis is necessary for establishment of regular cyclic ovarian activity, which leads to better fertility. Experiment had included 50 cows during first 52 days of lactation. Cows were separated in two main groups, those with normal puerperium - NP (n=32) and abnormal puerperium - AP (n=18). Examinations have been performed during period of 6 to 52 days postpartum. Ovarian dominant follicles have been observed using diagnostic ultrasound linear scanner. The highest number of dominant follicles are present during first two examinations, then their number declines and later in last two examinations rise again. Decrease in number of dominant follicles in both groups is most expressed in period of 14-30 days. During first examination, left ovaries have more dominant follicles, compared with right ovaries, while during later examinations, it is changed in favor of right ovaries. Increased number of vital dominant follicles from period 38-45 days postpartum and absence of abnormal uterine content in lumen in same period postpartum is sign of upcoming fertile estrus.

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