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[Seasonal variations in infant mortality in Cuba].

Mortality risk in the first year of life is different according to climatological characteristics of the season's year. In this paper two periods are taken (1965-1971 and 1979-1985) with the purpose of analyzing seasonal variations in infant mortality and to determine seasonal differences between both periods and in each of them. This study may identify the existence of seasonality and the presence of overmortality in summer months. This seasonality is not similar in both periods because of the decrease in infant mortality rate and the changes in the cause of death structure. Author gives element to planning from a more realistic view evolution during the year of infant mortality rate in the country.

Cuba↗

[The cattle breeding program of the Republic of Cuba].

The Cuban cattle breeding programme has remained unchanged over more than 20 years and aims at the genetic transformation of the indigenous population by means of crossbreeding within a high-performance cattle stock. Focus is on the breeds Holstein X Zebu in order to produce the crosses "Holstein Tropical" (7/8H 1/8Z), "Mambi" (3/4H 1/4Z), and "Siboney" (5/8H 3/8Z). Besides these, other new breeds are envisaged for milk and meat production. Representative parameters of the production and reproduction of the new genotypes are being reported and discussed.

Animals↗