Influence of season and microclimate on fertility of dairy cows in a hot-arid environment

Ray, D. E.; Jassim, A. H.; Armstrong, D.V.; Wiersma, Frank; Schuh, J.D.

doi:10.1007/bf01224816

Cited by 12 publications

(12 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this study the authors report that in Holstein cows, spring calving is associated with the longest service period, while the shortest was in the fall and winter season. Similar results were reported by Ray et al (1992), who also found a reduction in reproduction measured as longer service period, longer calving interval and higher count of services per conception during the hot months.…”

Section: Introductionsupporting

confidence: 89%

“…Specifically, Oseni et al (2004) found that spring calving is associated with the longest service period (166 days), while in the fall and winter season it is shorter (130; 150 days). Ray et al (1992) found a longer service period and inferior reproduction traits in the hot season of the year. The authors reported for spring, fall and summer length of service periods 103; 103 and 119 days and for calving interval 378; 382 and 396 days respectively.…”

Section: Discussionmentioning

confidence: 95%

“…The effect of heat stress on nonreturn rate was studied by Al-Katanani et al (1999) and Ravagnolo et al (2002). From the viewpoint of services per conception heat stress was evaluated by Ray et al (1992). Research on heat stress has also focused on gametogenesis and subsequent development of embryos (Al-Katanani et al, 2002;Ryan et al, 1993;Bezdíček et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Effect of High Summer Temperatures on Reproduction in Holstein and Czech Fleckvieh

Bezdíček¹,

Nesvadbová²,

Louda³

2020

Acta Univ. Agric. Silvic. Mendelianae Brun.

View full text Add to dashboard Cite

The aim of this study was to evaluate the effect of the hot summer season on the length of service period (number of days from calving to the next conception). For the analysis was created two databases of twins. Twins had the same sire and dam and the first and second lactations took place on the same farm. In the first database (105 pairs) one of the twins was calved (and had the following service period) during the summer months and the second of the twin was calved in the cooler months. To compare the difference in service period between twins in the hot and cool seasons, it was made also second group of twin pairs with reproduction only during the cool period of the year (cool vs. cool season; 58 pairs). The data were analysed using PROC GLM of Statistica®. In addition to season, the effect of breed (Holstein, Czech Fleckvieh), milk production at 1st lactation and calving year were also taken into consideration. The results showed a significantly longer service period in the summer (133.8 days) than in the cool months (114.7 days). In the case of twins with reproduction in the cool months of the year, the difference between length of service period was shorter and insignificant (113.6 vs. 119.4 days).

show abstract

Section: Introductionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Effect of High Summer Temperatures on Reproduction in Holstein and Czech Fleckvieh

Bezdíček¹,

Nesvadbová²,

Louda³

2020

Acta Univ. Agric. Silvic. Mendelianae Brun.

View full text Add to dashboard Cite

show abstract

“…The data show that calving patterns are highly seasonal and that the degree of seasonality has changed significantly over the last ten years (figure 7). Seasonality in calving reflects differences in calving interval (Esslemont 1992;Kafidi et al 1992) and calving rates also vary with climate, herd, breed and sire (Kafidi et al 1992;Ray et al 1992).…”

Section: (D ) Calving Patternsmentioning

confidence: 99%

The epidemiology of BSE in cattle herds in Great Britain. I. Epidemiological processes, demography of cattle and approaches to control by culling

Donnelly

Ferguson

Ghani

et al. 1997

Phil. Trans. R. Soc. Lond. B

View full text Add to dashboard Cite

This paper explores the key epidemiological processes and demographic factors that determined the pattern of transmission of the aetiological agent of bovine spongiform encephalopathy (BSE) in cattle herds in Great Britain (GB). The analyses presented utilize data from published and unpublished experimental studies and from the GB central database of confirmed BSE cases. We review the experimental and epidemiological evidence that has both confirmed indirect horizontal transmission via the consumption of infectious material as the major transmission route and provided information on the duration and variability of the dose–dependent incubation period of BSE in cattle. The epidemiological and genetic data pertaining to the possible existence of maternal transmission and/or genetically variable susceptibility to infection is discussed. The demography of British cattle is characterized and the impacts of key demographic features on the observed epidemic profile are discussed. In the main BSE case database, analyses reveal that BSE cases cluster significantly at both the holding and county scale. Furthermore, analysis of longitudinal patterns reveal substantial temporal within–holding correlation. Such clustering of cases suggests a highly heterogeneous infection process. The paper ends with a discussion of how analyses of spatio–temporal clustering inform the design of targeted culling programmes aimed at reducing future disease incidence. We show how the retrospective implementation of culling policies on the BSE case database allows the qualitative evaluation of policy performance, but that model predictions of future trends in case incidence are required to estimate the precise impact of any current or future programme.

show abstract

“…However, improved nutritional status of cows in hot arid conditions in Kuwait had resulted in improved milk yield and reduced feed cost [1] . Studies carried out in Arizona, USA by Ray et al [7] found that there was a significant influence of seasons and microclimate on fertility of dairy cows. An eight year duration study was conducted in the commercial dairy farms of Kuwait to Calf mortality and its causes: Retrospective data: Calf mortality data of a complete year were extracted from the database of the PAAFR [8] which included number of calves born, died and sold from all farms of Kuwait.…”

Section: Introductionmentioning

confidence: 99%

Improving Performance of Replacement Heifers in Hot Arid Environment Under Intensive Management

Razzaque¹,

Mohammed²,

Mutawa³

et al. 2009

American J. of Animal and Veterinary Sciences

View full text Add to dashboard Cite

Problem statement: Imported Holstein Friesian dairy cattle are exposed to hot arid climate in feedlot management in Kuwait. Desert climate is extreme reaching high 45-50°C in summer and low -4ºC in winter at day and night respectively. High calf mortality, poor reproduction and milk yields were main constraints to viable dairying. The objectives of this study were to assess the magnitude of calf mortality, its causes; implement strategic intervention measures for improving calf survival rates and evaluate dairy herd performance. Approach: Two scenarios were used: (1) studying dairy herd performance without applying intervention measures and (2) introducing improved management with interventions. Performance of the herds of situations 1 and 2 were compared. Three classes of dairy herds, pre-weaned calves, heifers and first lactation cows born in Kuwait were used. Results: Implementing intervention measures resulted in significant (p = 0.001) reduction of crude calf mortality rates from a mean of 43.6% to a low 4.67%. Growth rates of calves and heifers increased significantly, resulting in breeding of locally raised heifers at 15 mo age instead of usual practice of breeding at 18-22 mo. Feed cost was significantly reduced by 14-25% by early breeding of heifers. Herd culling rate was reduced from 62-33% and conception rates increased by 41%. The milk yield was increased by 1.25-1.50 fold through replacing the imported cows by locally born heifers. Adult cattle mortality rates reduced from high 9 to a low 1%. Case study showed that locally born and reared dairy herd formed a mean of 65.8% of total dairy cattle in cooperating farms. Conclusion: A systematic applied research studies in the commercial dairy farms had resulted in a visible improvement in the performance of all categories of locally born dairy herds and they were better adapted to the local hostile climate.

show abstract

Influence of season and microclimate on fertility of dairy cows in a hot-arid environment

Cited by 12 publications

References 9 publications

The Effect of High Summer Temperatures on Reproduction in Holstein and Czech Fleckvieh

The Effect of High Summer Temperatures on Reproduction in Holstein and Czech Fleckvieh

The epidemiology of BSE in cattle herds in Great Britain. I. Epidemiological processes, demography of cattle and approaches to control by culling

Improving Performance of Replacement Heifers in Hot Arid Environment Under Intensive Management

Contact Info

Product

Resources

About