Abstract

VERDOLJAK, Juan et al. Reproduction and mortality of cattle breeds in subtropical climate of Argentina. Abanico vet [online]. 2018, vol.8, n.1, pp.28-35. ISSN 2448-6132.  https://doi.org/10.21929/abavet2018.81.2.

Tropical environmental climate causes low reproductive rates in cattle, so the objective of the present study was to evaluate the possible effects of the climate on the reduction of the rates of bovine reproduction. The work was carried out in the Experimental Agriculture Station (EAS) in Corrientes, Argentina, where, 3,082 bovine herd records data were analyzed from 1991 to 2009, three breeds, Hereford (HR), Braford (BF) and Brahman (BH). It was evaluated the percentage of losses from the diagnosis of gestation until the delivery (DP) and from the delivery until the weaning to the 205 d (PD). Data were analyzed by analysis of variance in a completely randomized design and with an analysis of correlation. The greater losses (P < 0.05) were observed during the period of gestation for them cows BH and BF, the humidity relative not presented difference (P > 0.05) between DP and PD. There was a correlation between the humidity and the radiation with the cows that were not in gestation (HR and BF), the cows BH not presented any relation.

Keywords : Mortality; bovines; efficiency.

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