Reproductive loss in high-producing dairy cattle: where will it end?

By M. Lucy. Journal of Dairy Science, 2001

1,625 citations recorded by the source corpus.

Subfields: Agronomy and Crop Science, Genetics, Public Health, Environmental and Occupational Health

View Paper: https://www.semanticscholar.org/paper/a8c6c1516453e1fa4e9a20fb50d93cb0b76e79c2

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Agronomy and Crop Science

1. E. Price
2. S. Walsh
3. P. Hansen
4. E. Williams
5. A. Evans
6. D. Broom
7. P. Oltenacu

In Genetics

1. E. Price
2. S. Walsh
3. P. Hansen
4. Corrado Dimauro
5. S. Rassu
6. E. Williams
7. A. Evans
8. Roberto Steri

In Public Health, Environmental and Occupational Health

1. E. Price
2. S. Walsh
3. P. Hansen
4. E. Williams
5. A. Evans
6. D. Broom
7. P. Oltenacu

Citations in the corpus

• The mathematical description of lactation curves in dairy cattle (2011, background): “During the last decades, an increase in the average milk yield per lactation in specialized dairy breeds has occurred due to genetic selection and improved management practices (Lucy, 2001; Sorensen et al., 2008).”
• Animal Domestication and Behavior (2003, background): “As milk production has increased, reproductive efficiency has declined (see review by Rauw et al., 1998; Lucy, 2001).”
• Effect of sire, age at first calving, season and year of calving and parity on reproductive performance of Friesian cows under semiarid conditions in Egypt. (2010, background): “Factors causing reproductive decline in Europe and Australia may be different from those in the United States (Lucy, 2001).”
• The effect of embryonic death rates in cattle on the efficacy of estrus synchronization programs. (2004, background): “By days 5–6 post-insemination, only 65% of the fertilized eggs are considered viable, which represents only 50% of the total embryos/oocytes combined (Table 2), partially explaining the low conception in lactating dairy cows in the US (Lucy, 2001; Stevenson, 2001).”
• Invited review: Enteric methane in dairy cattle production: quantifying the opportunities and impact of reducing emissions. (2014, background): “been a concern (Hansen, 2000; Lucy, 2001; LeBlanc, 2013), indications are that this trend has been stalled or reversed (USDA, 2012).”
• Embryonic mortality in cattle from the embryo's perspective (2002, background): “Pregnancy rate per insemination in dairy cattle has declined in the last 30 yr or so in the United States and Great Britain (Royal et al., 2000; Lucy, 2001).”
• High feed intake increases liver blood flow and metabolism of progesterone and estradiol-17beta in dairy cattle. (2002, background): “For example, the decrease in circulating P4 due to elevated steroid metabolism could be partially responsible for the reduction in fertility (Lucy, 2001; Washburn et al., 2002) or the increased pregnancy loss (Vasconcelos et al., 1997) in lactating dairy cows.”
• The impact of genetic selection for increased milk yield on the welfare of dairy cows (2010, background): “In the US, calving interval increased from < 13.0 months to > 14.5 months and number of inseminations per conception from 2.0 to > 3.5 from 1980 to 2000 in 143 US commercial herds (Lucy 2001).”
• A review of the causes of poor fertility in high milk producing dairy cows (2010, positive): “This has occurred in countries and regions that operate diverse production systems, from continuously calving herds found mostly in the UK and North America to seasonal calving herds found mostly in Ireland, New Zealand and Australia (Lucy, 2001; Dillon et al., 2006; Macdonald et al., 2008).”