University of Technology and Life Sciences in Bydgoszcz, Bydgoszcz, Poland
Bibliografia
Atrey R.K., 2003. Genetics of replacement rate in Frieswal cattle. Ph.D. Thesis. G.B. Pant University of Agriculture and Technology, Pantnagar.
Banik S., Naskar S., 2006. Effect of non-genetic factors on replacement rate and its components in Sahiwal cattle. Indian J. Anim. Sci. 76, 34-345.
Berry D.P., Cromie A.R., 2007. Artificial insemination increases the probability of a male calf in dairy and beef cattle. Theriogenology 67, 346-352.
Demiral O., Ün M., Abay M., Bekyürek T., 2007. The effect of artificial insemination timing on the sex ratio of offspring and fertility in dairy cows. Turk. J. Vet. Anim. Sci. 31, 21-24.
Echternkamp S.E., Cushman R.A., Allan M.F., Thallman R.M., Gregory K.E., 2007. Effects of ovulation rate and fetal number on fertility in twin-producing cattle. J. Anim. Sci. 85, 3228-3238.
Goshu G., Singh H., 2013. Genetic and non-genetic parameters of replacement rate component traits in Holstein Friesian cattle. Springer Plus 2, 581.
Habib M.A., Afroz M.A., Bhuiyan A.K., 2010. Lactation performance of Red Chittagong cattle and effects of environmental factors. The Bang. Vet. 27 (1), 18-25.
Hinde K., Carpenter A.J., Clay J.S., Bradford B.J., 2014. Holsteins favor heifers, not bulls: biased milk production programmed during pregnancy as a function of fetal sex. PLoS ONE 9. Doi:10.1371/journal.pone.0086169.
Iwata H., 2012. Factors affecting the primary sex ratio in cows. J. Mamm. Ova Res. 29, 96-102.
Kaygisiz A., Vanli Y., 2008. Factors influencing sex ratio in Brown Swiss cattle. Indian J. Anim. Sci. 78, 656-657.
Kaygisiz, A., Vanli Y., Cakmak L., 2003. Estimates of genetic and phenotypic parameters of sex ratio in Holstein cattle. GAP III. Agricultural Congress, Sanliurfa, Turkey.
Kumar A., Lavania G.S., Lathwal S.S., 1992. Sex ratio in crossbred cattle. Indian J. Anim. Res. 26, 25-28.
Lari M.A., 2006. Sex ratio at birth in dairy herds in Fars province, southern Iran. Trop. Anim. Health Prod. 38, 593-595.
Lathwal S.S., Kumar A., 1993. Genetics of replacement rate and its components in Red Sindhi cows. Indian J. Vet. 71, 892-896.
Mukherjee K., Tomar S.S., Singh R.B., 2000. Variability in sex ratio. J. Anim. Res. 34, 24-28.
Nogalski Z., 2004. Zootechniczne uwarunkowania jakości porodu jałówek i krów czarnobiałych [Factors determining calving ease in black-and-white heifers and cows]. Rozpr. Monogr. UWM Olsztyn 101, 5-76 [in Polish].
Norman H.D., Wright J.R., Kuhn M.T., Hubbard S.M., Cole J.B., Vanraden P.M., 2009. Genetic and environmental factors that affect gestation length in dairy cattle, American Dairy Science Association 5, 2259-2269.
Obese F.Y., Acheampong D.A., Darfour-Oduro K.A., 2013. Growth and reproductive traits of Friesian x Sanga crossbred cattle in the Accra plains of Ghana. Afri. Schol. Sci. Commun. Trust 13, 7357-7371.
Quesnel F., Wilcox Ch., Simerl., Sharma A., Thatcher W., 1995. Effects of fetal sex and sire and other factors on periparturient and postpartum performance of dairy cattle. Braz. J. Gen. 18 (4), 541-545.
Roche J.R., Lee J.M., Berry D.P., 2006. Climatic factors and secondary sex ratio in dairy cows. J. Dairy Sci. 89, 3221-3227.
SAS Institute Inc. 2013. SAS/STAT 9.4 User’s Guide. Cary, NC: SAS Institute Inc.
Silva del Río N., Stewart S., Rapnicki P., Chang Y.M., Fricke P.M., 2007. An observational analysis of twin births, calf sex ratio, and calf mortality in Holstein dairy cattle. J. Dairy Sci. 90, 1255-1264.
Silva H., Wilcox C.J., Thatcher W.W., Becker R.B., Morse D., 1992. Factors affecting days open, gestation length and calving interval in Florida dairy cattle. J. Dairy Sci. 75, 288-293.
Singh B., Kumar D., Singh H., Prasad R.B., Singh J.B., 2004. Genetic studies on sex ratio in dairy cattle. Indian J. Anim. Sci. 74, 986-988.
Yilmaz I., Eyduran E.A., Kaygisiz A., 2010. Determination of some environmental factors related to sex ratio of Brown Swiss calves. J. Anim. Plant Sci. 20, 164-169.