The effect of feeding and management practices on calving rate in dairy herds

Fahey, J. E.; O’Sullivan, Kathleen; Crilly, J.; Mee, John F.

doi:10.1016/s0378-4320(02)00192-6

Cited by 24 publications

(30 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The skewed distribution of herd perinatal mortality rates reported here demonstrates that while many herds do not experience losses, the majority of herds experience some loss and a very small proportion of herds have very high perinatal mortality rates. Factor analysis showed that while herds with a lower than average mean lactation number and those calving in the late summer and autumn had higher calf mortality on Irish dairy farms, this was not influenced by herd size (Fahey et al, 2002). Similarly, while Fourichon et al (2001) identified clusters of herds with a high prevalence of peri partum disorders, this was not influenced by herd size.…”

Section: Discussionmentioning

confidence: 93%

Prevalence of, and risk factors associated with, perinatal calf mortality in pasture-based Holstein-Friesian cows

Mee

Berry

Cromie

2008

Animal

119

104

View full text Add to dashboard Cite

Recent publications indicate that the prevalence of perinatal mortality has increased in some dairy industries and an increased proportion of this loss is not associated with the traditional risk factors for perinatal mortality. The objectives of this study were to establish the prevalence of perinatal mortality (calf death within 24 h of calving) in Irish dairy herds and to determine the current significance of putative risk factors in pasture-based management systems. A total of 182 026 records of full-term calvings from Holstein-Friesian dams served by artificial insemination (AI) sires of seven breeds in herds of 20 calvings or more per year were available from the Irish national breeding database over 4 years (2002 to 2005). The prevalence of perinatal mortality was 4.29% (7.7% in primiparae and 3.5% in pluriparae). The likelihood of perinatal mortality increased between 2002 and 2005 and was greatest in June and in winter. There was an interaction (P , 0.001) between the effect of calving assistance and parity with the effect of dystocia on perinatal mortality being greater in primiparae. The odds of perinatal mortality were greater in male (OR 5 1.12; P , 0.001) and in twin calves (OR 5 5.70-13.36; P , 0.001) and in dams that had perinatal mortality at the previous calving (OR 5 4.21; P , 0.001). The logit of the probability of perinatal mortality increased by 0.099 per unit increase in sire predicted transmitting ability (PTA) for direct perinatal mortality. The probability of perinatal mortality increased at an increasing rate in primiparae as animals calved at a younger age relative to the median age at first calving. The only herd-level factor examined, herd size did not affect the odds of perinatal mortality. These data indicate that the prevalence of perinatal mortality in this cattle population is similar to that in other pasture-based dairy systems worldwide. The putative exposures and attributes traditionally associated with perinatal mortality were associated with perinatal mortality in this pasture-based dairy cow population. The practical implication of these results is that as many of the significant risk factors are largely not under management control (year of calving, month of calving, twin calving, primiparity, previous perinatal mortality and foetal gender), herd owners must focus on the significant determinants under their control (age at first calving, sire genetic merit for direct perinatal mortality and both the extent of calving supervision and the degree of assistance), in order to reduce the prevalence of perinatal mortality and improve perinatal welfare.

show abstract

Section: Discussionmentioning

confidence: 93%

Prevalence of, and risk factors associated with, perinatal calf mortality in pasture-based Holstein-Friesian cows

Mee

Berry

Cromie

2008

Animal

119

104

View full text Add to dashboard Cite

show abstract

“…But, the decrease in reproductive efficiency in dairy cows worldwide is not solely due to increase in milk yield. A high milk yield will only provoke a higher risk of infertility under suboptimal conditions, such as inadequate nutrition or environment (Fahey et al, 2002;Calus et al, 2005). There are equally important other factors contributing to the problem.…”

Section: Introductionmentioning

confidence: 99%

The effect of calving season on reproductive performance of Jersey cows

Soydan

Kuran

2017

Mljekarstvo

View full text Add to dashboard Cite

Dairy records, containing 1269 lactation record of 462 Jersey dairy cows collected over 16 years, from an agricultural state farm were used. Data for reproductive performance of cows were also collected. Means of the herd for lactation milk yield, calving interval, days open, interval from calving to the first insemination, lactation length, gestation length and dry period were 3195.7±20.2 kg, 366.6±1.7 d, 92.9±1.6 d, 78.0±1.3 d, 301.7±1.1 d, 275.2±0.2 d and 69.3±0.8 d, respectively. The effect of calving season (winter, spring, summer and autumn) on reproductive performance for high, low and moderate milk-yield cows was investigated. Calving season affected the days from calving to first insemination in high and moderate yielding cows (P<0.001) while didn't affect low yielding cows. In summer, days open in high yielding cows were 35 days longer compared to winter season (P<0.001) as observed for moderate yielding cows (P<0.01). In high yielding cows, calving interval was 18 days longer in spring compared to winter calving season. Calving season also affected the first service conception rate in high yielding cows (P<0.05). Services per conception in autumn were lower than the other seasons (P<0.001). In conclusion, high yielding dairy cows need more attention in summer season with respect to body condition score, dietary energy: protein ratio, uterus health and elimination of heat stress, to get more profit in dairy farm.

show abstract

“…However, some studies have suggested that a higher risk of fertility failure in high-producing dairy cows occurred only under sub-optimal conditions such as inadequate nutrition or environment (Fahey et al 2002;Calus et al 2005). Also, there are some reports that no relationships between milk production at artificial insemination and conception rates were observed (Lopez-Gatius et al 2005;Garcia-Ispierto et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Reproductive performance of Holstein dairy cows in Iran

Ansari-Lari

Kafi

Sokhtanlo

et al. 2010

Trop Anim Health Prod

View full text Add to dashboard Cite

The objectives of the present study were to describe the current reproductive parameters of Holstein dairy cows in Iran and to determine factors which have a significant effect on reproductive performance with emphasis on high-producing dairy cows. Five large Holstein dairy herds from the major milk production areas of Iran were selected for this study. Reproduction data including parity of dam, calving date, days to first service, days open, number of services, dry period, and occurrence of diseases for cows that calved from 2004 to 2007 were collected from the herds' databases. To determine the effects of year and season of calving, disease status, level of milk production, and parity of dam on reproductive parameters, the proc-mixed procedure in SAS software was used. Overall, data about 8,204 lactation were collected for the study. Results showed that mean (+/-SD) days open, calving interval, and days to first service for study herds were 134 (+/-89), 403 (+/-86), and 67 (+/-38) days, respectively. Conception rates at the first service and the overall service-conception rate were 41.6% and 41%, respectively. The level of milk production and diseases had significant negative effects on days open and service per conception (P < 0.05); statistical analysis showed that for every 100-kg increase in milk yield, days open will increase by about 0.3 days. However, no significant effect of level of productivity was observed on days to first service. The results of this study indicate that high milk production is a risk factor for decreasing fertility in Iran, like many other parts of the world.

show abstract

The effect of feeding and management practices on calving rate in dairy herds

Cited by 24 publications

References 15 publications

Prevalence of, and risk factors associated with, perinatal calf mortality in pasture-based Holstein-Friesian cows

Prevalence of, and risk factors associated with, perinatal calf mortality in pasture-based Holstein-Friesian cows

The effect of calving season on reproductive performance of Jersey cows

Reproductive performance of Holstein dairy cows in Iran

Contact Info

Product

Resources

About