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The study was conducted at the Amazon Research Center CIMAZ - MACAGUAL of the University of Amazonia, Colombia, with a tropical rain forest climate (Af). The behavior of Bos taurus, Bos indicus, and Caqueteño Creole cattle, the animals were observed in paddocks with three levels of scattered tree cover density. The pasture was composed of Braquiaria decumbens with 35 days of regrowth. Direct observations were made from 9:00 a.m. to 5:00 p.m. with 10-minute intervals between the recording of the activities. The activity performed most often during the day by all of the animals was grazing under the sun, and those who pasture the most are the Caqueteño Creole, followed by the Bos indicus and, finally, the Bos taurus. Ruminating was the second most important activity performed by the cattle, having presented the same tendency. In the paddocks with a low level of tree cover, the animals pasture more in the shade; this trend is more relevant among B. taurus cattle. Caqueteño Creole cattle dedicate less time to water consumption and rest, spending more time grazing, in the high and medium cover levels, they interrupt the grazing at noon for a shorter time compared to B. indicus and B. taurus; after 2 p.m., the creoles vertiginously increase grazing. At the high cover level, the peak of grazing of the Caqueteño Creoles is at 9 a.m. and from 1-1:30 p.m., while at the medium tree cover level, the peak of pasturing was at noon, 1:30 p.m., and 4:30 p.m., at the high tree level of cover, the peak for the three breeds was at 11 a.m. Only at the average tree level of cover did the Caquetaño creoles and B. indicus present a similar peak. In 9-9:30 a.m. and 4-5 p.m., the breeds substantially reduce rumination.

La investigación fue desarrollada en seis predios del municipio de Florencia Caquetá, con el objetivo de identificar el nivel de estabilidad enzoótica de Babesia sp. y Anaplasma sp., y los factores relacionados con su presencia. Para el examen sanguíneo fueron muestreados 96 animales de los cuales ocho resultaron positivos indicando una prevalencia del 8,3 %. Ninguno de los predios estudiados presentó estabilidad enzoótica a hemoparásitos. El nivel de infestación de garrapatas resulta directamente proporcional a las presencia de hemoparasitos en las fincas. Las características raciales de los animales con predominio de genes Bos primigenius taurus, prácticas como frecuencia, calidad, método y producto utilizado para el control de vectores y el manejo de pasturas, influyen directamente sobre la presencia de hemoparásitos en los predios.

En tres fincas del departamento de Caquetá, Colombia, en los municipios del Doncello, Belén de los Andaquíes y Florencia, ubicados en la región amazónica, se desarrolló la evaluación comportamental de bovinos doble propósito en potreros arbolados con diferentes niveles de cobertura, mediante la técnica de registro ab libitum de ejecución y muestreo 'scan' instantáneo (Altmann, 1974). Con el estudio se identificaron resultados similares en las tres fincas, como más largos y frecuentes períodos de rumia en potreros de coberturas bajas o nulas y mayor frecuencia de pastoreo diurno en potreros de cobertura media