M. E. Magana

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BACKGROUND AND OBJECTIVES More than two thirds of the cases of tuberculosis (TB) in the United States occur in non-white minorities and immigrants. The Philippines is the Asian country of origin with the greatest numbers of TB cases among the foreign-born. This paper explores Filipino knowledge, attitudes, and practices concerning TB. METHODS Four focus(More)
1. We investigated the causes of natal dispersal in four Spanish areas where 35 breeding groups of the polygynous great bustard Otis tarda were monitored intensively. A total of 392 juveniles were radio-tracked between 1991 and 2006 by ground and via aeroplane to avoid potential biases derived from the non-detection of long-distance dispersers. 2. We(More)
We examined how mating success varied in relation to age, weight, body size, and display behavior among great bustard Otis tarda males. The estimated mating success was strongly skewed, with 45% of adult males being involved in copulation attempts and only 9.7% actually seen copulating successfully. Unlike most birds, body size continued increasing in great(More)
C. A. Martı́n, Instituto de Investigación en Recursos Cinegéticos, IREC (CSIC, UCLM, JCCM), Ronda de Toledo s/n, E-13071 Ciudad Real, Spain. J. C. Alonso (correspondence), C. Palacı́n, M. Magaña and B. Martı́n, Departamento de Ecologı́a Evolutiva, Museo Nacional de Ciencias Naturales, CSIC, José Gutiérrez Abascal 2, E-28006 Madrid, Spain. E-mail:(More)
We investigated the spatial arrangement of Great Bustard Otis tarda nests relative to leks in 55 females captured at four lek sites and radio-tracked through 1–6 years in a protected area in central Spain. Although females showed a tendency to nest close to the lek centers where they were observed during the mating season (29% did it at <2 km), lek-to-nest(More)
Dispersing individuals can use conspecifics as indicators of habitat quality and aggregate at traditionally occupied sites, leaving other favourable patches unoccupied. Here we test the predictions of the conspecific-based habitat selection hypothesis on a Spanish great bustard (Otis tarda) metapopulation, currently fragmented due to recent human-induced(More)
Resumen.—Otis tarda es el ave con mayor dimorfismo sexual y una de las de mayor peso entre las que conservan la capacidad de vuelo. Los machos adultos capturados en España fueron 2.48 veces más pesados que las hembras y sus medidas lineales un 18–30% mayores que las de las hembras. Entre finales del invierno y la estación reproductiva el peso medio aumentó(More)
We studied the genetic diversity of great bustards (Otis tarda) in Iberia and Morocco, the main stronghold of this globally endangered species. Samples were collected from 327 individuals covering most of the distribution range within the study area. Sequence variation in a 657 bp fragment of the mtDNA control region revealed 20 variable sites defining 22(More)
During a long-term study of individually marked, free-living male great bustards captured as chicks and radio-tracked through several years in Spain, we studied the development with age of two secondary sex traits, the moustachial feathers and the neck plumage pattern. Juvenile males acquired full adult plumage between their fourth and seventh years. The(More)