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Animal Science Database

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Abstract

In this single herd observational study, there is investigation of the effects of 81 sires (with 11,424 artificial inseminations) on conception rates in 1790 Holstein cows for 5 years. Sires were categorized based on the published sire conception rate (SCR) into different sire fertility groups...

Author(s)
Abdalla, H.; Elghafghuf, A.; Elsohaby, I.
Publisher
Elsevier B.V., Amsterdam, Netherlands
Citation
Animal Reproduction Science, 2019, 209, pp 106147
Abstract

In cattle artificial insemination plays not only a vital role in the successful establishment of pregnancy, which is a prerequisite for initiation of the subsequent lactation, but also in accelerating genetic improvement and facilitating the distribution of semen from genetically elite sires. The...

Author(s)
Diskin, M. G.
Publisher
Cambridge University Press, Cambridge, UK
Citation
Animal, 2018, 12, s1, pp s75-s84
Abstract

Crossbreeding has been shown to improve the longevity of dairy cattle in countries across the world. The aim of this study was to estimate heterosis, breed effects, and genetic parameters for longevity in crossbred dairy cattle among Danish Holstein (DH), Danish Red (DR), and Danish Jersey (DJ)...

Author(s)
Clasen, J. B.; Norberg, E.; Madsen, P.; Pedersen, J.; Kargo, M.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2017, 100, 8, pp 6337-6342
Abstract

The productive and reproductive characteristics of Brown Swiss (B) cross-bred cows were investigated by comparing with those of Holstein (H) cows housed in the same barn. Additionally, their hair cortisol levels were analyzed to evaluate the extent of stress experienced during dry and lactation...

Author(s)
Endo, N.; Kuroki, R.; Tanaka, T.
Publisher
Wiley, Tokyo, Japan
Citation
Animal Science Journal, 2017, 88, 10, pp 1506-1512
Abstract

Antagonistic relationship between milk yield and reproduction is reported in several livestock species. This study aimed to investigate whether genetic merit for milk production in dairy sheep affects responses to superovulation, embryo yield and quality. A total of 21 cross-bred Sarda × Lacaune...

Author(s)
Meraï, A.; Dattena, M.; Casu, S.; Rekik, M.; Lassoued, N.
Publisher
Wiley, Berlin, Germany
Citation
Reproduction in Domestic Animals, 2017, 52, 5, pp 814-818
Abstract

This study investigated differences between phenotypes of daughters of artificial insemination (AI)-bulls and daughters of natural service (NS)-bulls, respectively, on organic dairy farms in Switzerland. Organic rules recommend the use of natural mating. Therefore it is of interest whether those...

Author(s)
Neff, A. S.; Ivemeyer, S.
Publisher
Elsevier B. V., Amsterdam, Netherlands
Citation
Livestock Science, 2016, 185, pp 30-33
Abstract

Multiparous red deer (Cervus elaphus scoticus) hinds (n=18) were artificially inseminated with semen from a red deer stag (n=8) or wapiti bull (C.e. nelsoni) (n=10) to produce red deer or F1 crossbred (C.e. scoticus × C.e. nelsoni) calves. A further seven wapiti × red deer (F1) hinds were...

Author(s)
Stevens, D. R.; Archer, J. A.; Asher, G. W.; Ward, J. F.; Scott, I. C.; O'Neill, K. T.; Littlejohn, R. P.; Barrell, G. K.
Publisher
Elsevier B. V., Amsterdam, Netherlands
Citation
Livestock Science, 2014, 170, pp 172-180
Abstract

Multiparous red deer (Cervus elaphus scoticus) hinds (n=17) were either mated to a red deer stag or artificially inseminated with semen from a wapiti bull (C.e. nelsoni) to produce red deer or F1 crossbred (C. e. scoticus × C. e. nelsoni) calves to test the hypotheses that (1) red deer hinds...

Author(s)
Archer, J. A.; Asher, G. W.; Stevens, D. R.; Ward, J. F.; Scott, I. C.; O'Neill, K. T.; Littlejohn, R. P.; Barrell, G. K.
Publisher
Elsevier B. V., Amsterdam, Netherlands
Citation
Livestock Science, 2013, 157, 1, pp 289-298
Abstract

Normande (NO) × Holstein (HO) crossbred cows (n=251), Montbéliarde (MO) × HO crossbred cows (n=503), and Scandinavian Red (SR) × HO crossbred cows (n=321) were compared with pure HO cows (n=416) for fertility, somatic cell score (SCS), and 305-d projected milk, fat, and protein production during...

Author(s)
Heins, B. J.; Hansen, L. B.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2012, 95, 2, pp 918-924
Abstract

Dairy herd size is expected to increase in many European countries, given the recent policy changes within the European Union. Managing more cows may have implications for herd performance in the post-quota era. The objective of this study was to characterise spring-calving herds according to size...

Author(s)
Jago, J. G.; Berry, D. P.
Publisher
Cambridge University Press, Cambridge, UK
Citation
Animal, 2011, 5, 10, pp 1626-1633

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