Reasons for culling in French Holstein cows

Seegers, Henri H.; Beaudeau, François; Fourichon, Christine; Bareille, Nathalie N.

doi:10.1016/s0167-5877(98)00093-2

Cited by 80 publications

(82 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, cases occurring in early lactation [8,27] and during the dry period [9] are associated with the highest risk. Culling subsequent to mastitis occurs either very early in lactation, probably in relation to milking disability, or is delayed to the end of lactation [52,56]. A substantially increased risk of culling consecutive to teat injuries has also been reported by Beaudeau et al [7,8], probably because these disorders can disable a quarter or increase the risk for mastitis.…”

Section: Mid Term Effect: Longevitymentioning

confidence: 93%

“…Among health-related culling reasons, those related to udder disorders were the second most frequent: mastitis-related reasons counted for 5 to 17% of all culling circumstances [7,21,56], and reached 28.5% when high SCC and teat injury were added [60]. However, declared culling reasons are more or less subjective, and therefore they rather provide information on the farmer's reactions than constitute an objective evaluation of the impact of health disorders on longevity.…”

Section: Mid Term Effect: Longevitymentioning

confidence: 99%

See 1 more Smart Citation

Production effects related to mastitis and mastitis economics in dairy cattle herds

2003

View full text Add to dashboard Cite

-Mastitis is the most prevalent production disease in dairy herds world-wide and is responsible for several production effects. Milk yield and composition can be affected by a more or less severe short-term depression and, in case of no cure, by a long-acting effect, and, sometimes, an overlapping effect to the next lactation. Summary values in the literature for losses of milk production were proposed at 375 kg for a clinical case (5% at the lactation level) and at 0.5 kg per 2-fold increase of crude SCC of a cow. Due to the withdrawal period after treatment, composition changes in milk can almost be neglected in economic calculations. Lethality rate for clinical mastitis is very low on the average, while anticipated culling occurs more frequently after clinical and subclinical mastitis (relative risk between 1.5 and 5.0). The economics of mastitis needs to be addressed at the farm level and, per se, depends on local and regional epidemiological, managerial and economic conditions. To assess the direct economic impact of mastitis, costs (i.e. extra resource use) and losses (i.e. reduced revenues) have to be aggregated. To support decision making for udder health control, it is necessary to use a marginal approach, based on the comparison of the losses avoided and the additional costs of modified plans, compared to the existing ones.

show abstract

Section: Mid Term Effect: Longevitymentioning

confidence: 93%

Section: Mid Term Effect: Longevitymentioning

confidence: 99%

Production effects related to mastitis and mastitis economics in dairy cattle herds

2003

View full text Add to dashboard Cite

show abstract

“…These problems not only impair the lifetime production efficiency of dairy cows via reduced longevity by increasing involuntary culling (Seegers et al, 1998), but also increase veterinary and reproductive costs (Hogeveen et al, 2011) and environmental losses (Garnsworthy, 2004), and affect animal welfare (Oltenacu and Algers, 2005). An increased milk yield, a negative energy balance and a low body condition have been considered the major biological contributors to the failure of reproduction and thus to a curtailed productive lifespan of dairy cows (Friggens et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Modelling impacts of performance on the probability of reproducing, and thereby on productive lifespan, allow prediction of lifetime efficiency in dairy cows

Phuong

Blavy

Martin

et al. 2016

Animal

View full text Add to dashboard Cite

Reproductive success is a key component of lifetime efficiency -which is the ratio of energy in milk (MJ) to energy intake (MJ) over the lifespan, of cows. At the animal level, breeding and feeding management can substantially impact milk yield, body condition and energy balance of cows, which are known as major contributors to reproductive failure in dairy cattle. This study extended an existing lifetime performance model to incorporate the impacts that performance changes due to changing breeding and feeding strategies have on the probability of reproducing and thereby on the productive lifespan, and thus allow the prediction of a cow's lifetime efficiency. The model is dynamic and stochastic, with an individual cow being the unit modelled and one day being the unit of time. To evaluate the model, data from a French study including Holstein and Normande cows fed high-concentrate diets and data from a Scottish study including Holstein cows selected for high and average genetic merit for fat plus protein that were fed high-v. low-concentrate diets were used. Generally, the model consistently simulated productive and reproductive performance of various genotypes of cows across feeding systems. In the French data, the model adequately simulated the reproductive performance of Holsteins but significantly under-predicted that of Normande cows. In the Scottish data, conception to first service was comparably simulated, whereas interval traits were slightly under-predicted. Selection for greater milk production impaired the reproductive performance and lifespan but not lifetime efficiency. The definition of lifetime efficiency used in this model did not include associated costs or herd-level effects. Further works should include such economic indicators to allow more accurate simulation of lifetime profitability in different production scenarios.Keywords: dairy cow, lifetime efficiency, productive lifespan, reproduction, nutrient partitioning Implications This paper extended an existing lifetime performance model to incorporate the impacts that varying milk yield, energy balance and body condition have on the probability of reproducing and the productive lifespan, thereby allowing prediction of a cow's lifetime efficiency. The model adequately simulated the productive and reproductive performance of various genotypes of cows across feeding systems. Thus, it can be used to study the effect of future selection and management on animal performance and efficiency.

show abstract

“…The contribution of culling to disease-related losses is high. Half of the herd removals occur involuntarily and prematurely because of health disorders [1,11,19,43,44,51]. Moreover, the possibilities of culling based on voluntary replacement and selection are limited in case of high incidence of involuntary disposals [42].…”

Section: Introductionmentioning

confidence: 99%

Effect of health disorders on culling in dairy cows: a review and a critical discussion

et al. 2000

View full text Add to dashboard Cite

-Risk of culling consequent to the main health disorders occurring in the current production systems is reviewed. Survival analysis including health disorders as time-dependent variables is considered to be the most appropriate method to assess their effects because they allow a better description of the exact follow-up of disease history. Farmers preferentially consider health events in the current lactation and/or those occurring in early stages of lactation for making culling decisions. The unfavourable direct effects on culling of dystocia and udder disorders (mastitis and teat injuries) are clearly demonstrated, whereas there are variations between studies on the association between metabolic and reproductive disorders and culling. These variations may be due to differences in study designs, populations involved and methods. Consequences, in terms of estimated effect of health disorders, of methodological choices (e.g. whether or not including in the models descriptors for milk yield and/or reproductive performance) are discussed. Metabolic and reproductive disorders may act indirectly through a subsequent decrease in milk yield and reproductive performance. The impact of health disorders on longevity is on average weak, compared to the impact of low milk yield potential and poor reproductive performance. Herd characteristics (availability of heifers, quota, farmer's attitude towards risk and uncertainty...) modify the risk for a cow to be culled for a given health disorder. Aims of further studies could be (1) to interpret the meaning and to analyse the reliability of culling reasons information, (2) to evaluate the relative effect on culling of health disorders and performance (milk yield and reproduction) in different parities, (3) to investigate the role of components of the herd effect on the risk of culling. dairy cow / culling / health disorders / risk factors / survival analysis Résumé -Risque de réforme associé à la survenue de troubles de santé chez la vache laitière : revue et discussion critique. La revue porte sur le risque de réforme consécutif à la survenue des principaux troubles de santé dans les systèmes de production actuels. Pour estimer ce risque, les modèles Ann. Zootech. 49 (2000) 293-311 293

show abstract

Reasons for culling in French Holstein cows

Cited by 80 publications

References 28 publications

Production effects related to mastitis and mastitis economics in dairy cattle herds

Production effects related to mastitis and mastitis economics in dairy cattle herds

Modelling impacts of performance on the probability of reproducing, and thereby on productive lifespan, allow prediction of lifetime efficiency in dairy cows

Effect of health disorders on culling in dairy cows: a review and a critical discussion

Contact Info

Product

Resources

About