Culling from the herd's perspective—Exploring herd-level management factors and culling rates in Québec dairy herds

Haine, Denis; Delgado, Hector; Cue, R.I.; Sewalem, A.; Wade, K. M.; Lacroix, René; Lefebvre, Daniel; Arsenault, Julie; Bouchard, É.; Dubuc, J.

doi:10.1016/j.prevetmed.2017.08.020

Cited by 24 publications

(27 citation statements)

References 46 publications

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“…In selected regions of the United States, the average culling rate was 31.6% in 1999 [3] but was 27.7% in Pennsylvanian herds in 2005 [21]. In Canada, Haine et al [22] reported an average culling rate of 32% over the 2001-2010 decade and a dairy sell rate by 60 days in milk of 3.2%. The average culling rate of cows due to slaughter/death was 25.4%, ranging between 23% (in 2007) to 28% (in 2010) in Dutch dairy herds [23].…”

Section: Culling Rates and Farmers' Stated Reasons For Cullingmentioning

confidence: 99%

Culling reasons and risk factors in Estonian dairy cows

et al. 2020

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Background: Culling is a major cost for dairy farms but also an essential part in managing herd productivity. This study aimed to identify the culling rates of Estonian dairy cows, identify the farmers' stated reasons and risk factors for culling. This observational study used registry data of all cows from herds with ≥20 cow-years in 2013-2015. Cow lactation-level analyses included data of 86,373 primiparous cows from 409 herds and 177,561 lactations of 109,295 multiparous cows from 410 herds. Weibull proportional hazard regression models were used to identify risk factors for culling due to slaughter or death. Results: The overall culling rate of Estonian dairy cows was 26.24 (95% CI 26.02; 26.46) per 100 cow-years. The most common reasons farmers stated for culling were feet/claw disorders (26.4%), udder disorders (22.6%), metabolic and digestive disorders (18.1%) and fertility problems (12.5%). Animal-level risk factors for culling were Holstein breed, older parity, lower milk yield breeding value, older age at first calving, longer previous calving interval, having assisted calving, stillbirth and birth of twins/triplets. Lower milk yield, somatic cell count over 200,000 cells/ml and fat/protein ratio over 1.5 at first test-milking after calving were associated with greater culling hazard during the lactation. Cows from larger herds, herds with decreasing size and higher milk yields had a higher culling probability. Conclusions: This study emphasises the need for improved management of hoof health and prevention of mastitis and metabolic diseases. It is essential to ensure easy calving and good health of cows around calving in order to lower the culling hazard.

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Section: Culling Rates and Farmers' Stated Reasons For Cullingmentioning

confidence: 99%

Culling reasons and risk factors in Estonian dairy cows

et al. 2020

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“…Koketsu [30] reported that it is essential to make decisions on the basis of evidence from production records to control productivity. Demographic, reproduction, production, and health factors are determinants involved in the administration of a farm enterprise [25]. Epidemiological observational studies are suitable for analyzing the factors that hinder productivity or reproductive performance [36].…”

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confidence: 99%

Association of postpartum diseases occurring within 60 days after calving with productivity and reproductive performance in dairy cows in Fukuoka: A cow-level, retrospective cohort study

et al. 2019

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Peripartum disorders in dairy cows negatively influence their productivity and reproductive performance. However, only a few reports have clearly indicated the influence of such disorders on the productivity and reproductive performance at a local-area or cow-level in Japan. This study aimed to elucidate the influence of diseases occurring within 60 days after calving on subsequent productivity and reproductive performance. Accordingly, a wide-area database on dairy production was used for epidemiological analysis; subsequently, multivariable analysis was performed to investigate the association of such diseases with productivity or reproductive performance in 6,545 cows from 178 farms in Fukuoka. We used 305-day energy-corrected milk (305 ECM) as an index of productivity and conception and culling as indices of reproductive performance. With regard to causality, mixed-effects model was used for analyzing the association between disease and productivity, and Cox proportional hazard model was used for analyzing the association between disease and reproductive performance. Compared to the disease absence group, the disease presence group demonstrated significantly lower 305 ECM [−154 kg; 95% confidence interval (CI), −229 to −79] and risk of pregnancy [hazard ratio (HR), 0.85; 95% CI, 0.80–0.91] and higher risk of culling (HR, 1.36; 95% CI, 1.17–1.59). These results indicate that, in Fukuoka, dairy cows affected by diseases within 60 days after calving exhibit lower productivity and reproductive performance. Therefore, proper dairy cow management during the peripartum period to prevent diseases during early lactation may maintain or improve productivity.

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“…Another example in salmonids is the attempt to set up a data integration platform described by Meyer et al [ 75 ]. The use of animal production commercial data for research can significantly increase access to quality data with excellent coverage in time and space of the populations of interest, as shown by studies included in this work such as analyses conducted in the Chile salmonid industry [ 76 , 77 ] and in the Canadian dairy industry [ 78 ]. The confidentiality level required for these datasets as well as barriers to data sharing related to competitiveness and anti-trust regulation aspects suggest that there could be a fundamental incompatibility between the principles of open-access data and the use of commercial data for research.…”

Section: Discussionmentioning

confidence: 99%

Systematic review of the status of veterinary epidemiological research in two species regarding the FAIR guiding principles

Meyer

Faverjon²,

Hostens

et al. 2021

BMC Vet Res

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Background The FAIR (Findable, Accessible, Interoperable, Reusable) principles were proposed in 2016 to set a path towards reusability of research datasets. In this systematic review, we assessed the FAIRness of datasets associated with peer-reviewed articles in veterinary epidemiology research published since 2017, specifically looking at salmonids and dairy cattle. We considered the differences in practices between molecular epidemiology, the branch of epidemiology using genetic sequences of pathogens and hosts to describe disease patterns, and non-molecular epidemiology. Results A total of 152 articles were included in the assessment. Consistent with previous assessments conducted in other disciplines, our results showed that most datasets used in non-molecular epidemiological studies were not available (i.e., neither findable nor accessible). Data availability was much higher for molecular epidemiology papers, in line with a strong repository base available to scientists in this discipline. The available data objects generally scored favourably for Findable, Accessible and Reusable indicators, but Interoperability was more problematic. Conclusions None of the datasets assessed in this study met all the requirements set by the FAIR principles. Interoperability, in particular, requires specific skills in data management which may not yet be broadly available in the epidemiology community. In the discussion, we present recommendations on how veterinary research could move towards greater reusability according to FAIR principles. Overall, although many initiatives to improve data access have been started in the research community, their impact on the availability of datasets underlying published articles remains unclear to date.

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Culling from the herd's perspective—Exploring herd-level management factors and culling rates in Québec dairy herds

Cited by 24 publications

References 46 publications

Culling reasons and risk factors in Estonian dairy cows

Culling reasons and risk factors in Estonian dairy cows

Association of postpartum diseases occurring within 60 days after calving with productivity and reproductive performance in dairy cows in Fukuoka: A cow-level, retrospective cohort study

Systematic review of the status of veterinary epidemiological research in two species regarding the FAIR guiding principles

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