ity of a beef operation is the percentage of the calf crop weaned, which, in turn, is determined mainly by the number of cows bred during the breeding season. The herd bull influences overall herd fertility more than any other single animal. Because the bull also supplies half of the genetics to all of the calves he sires, bull selection can be the most powerful method of genetic improvement in...

BACKGROUND Predators can impact ecosystems through trophic cascades such that differential patterns in habitat use can lead to spatiotemporal variation in top down forcing on community dynamics. Thus, improved understanding of predator movements is important for evaluating the potential ecosystem effects of their declines. METHODOLOGY/PRINCIPAL FINDINGS We satellite-tagged an apex predator (b...

In this paperwe testwhethermean reversion in stockmarket prices presents a different behavior in bull and bear markets. We date the US bull and bear periods using Bry and Boschan (1971) algorithm. We examine the order of integration in the S&P 500 stock market index covering a daily period from August 1929 to December 2006 in bull and bear phases. Our results indicate the existence of different...

Distribution data describing the current shea range were obtained from John Hall (University of Wales, Bangor); for details, see previous reports and Vitellaria paradoxa: a monograph (Hall et al., 1996). In 2010, these records were supplemented with shea plot data from Burkina Faso, Mali and Ghana, and with the collection localities of herbarium specimens held at the Royal Botanic Gardens, Kew ...

Pilling, S., Mayo-Wilson, E., Mavranezouli, I., Kew, K. M., Taylor, C., Clark, D. M., Afgan, S., Anigbogu, B., Armstrong, P., Bennett, M., Cartwright-Hatton, S., Creswell, C., Dix, M., Hanlon, N., Leggett, K., Malizia, A. L., Roberts, J., Satrettin, K., Stephens, G., Stockton, S. and Stopa, L. (2013) Recognition, assessment and treatment of social anxiety disorder: summary of NICE guidance. Bri...

Fertility in a bull is generally defined as the ability to impregnate females. Certainly that is a minimum requirement, but a bull with high fertility is able to impregnate more than the expected number of cows in a short breeding season. Such a bull has greater economic value than one of lesser fertility (1,17). If the bull also has a desirable genetic background, it could contribute more than...

A post-pubertal bull on an artificial insemination station was found to be persistently shedding bovine viral diarrhoea virus (BVDV) in semen over a period of eleven months, while demonstrating no viraemia. Circulating antibodies to BVDV were consistently high, suggesting that the immune system was challenged repeatedly. Post-mortem findings confirmed that the virus was sequestered in the teste...

Balch, C. C. (1950). Brit. J. Nutr. 4, 361. Balch, C. C., Bartlett, S. & Johnson, V. W. (1951). J. agric. Sci. 41, 98. Balch, C. C. & Johnson, V. W. (1950). Brit. J. Nutr. 4, 389. Kellner, 0. (1907). Die Ernahrung der Lundwirtschuftlichen Nutztiere, 4th ed. Berlin: Paul Taray. Larsen, C., Hungerford, E. H. & Bailey, D. E. (1917). Bull. S. Dak. ugric. Exp. Sta. no. 175. Wood, T. B. (1927). Bull....

This paper considers a variety of econometric models for the joint distribution of stock and bond returns in the presence of regime switching dynamics. While simple twoor three-state models capture the univariate dynamics in bond and stock returns, a more complicated four state model with regimes characterized as crash, slow growth, bull and bull burst states is required to capture the joint di...