Presencia de la raya águila de piel áspera Aetomylaeus asperrimus (Chondrichthyes: Myliobatidae) en la costa del Pacífico Norte de Costa Rica

Estructura trófica de la asociación de peces intermareales de la costa rocosa del norte de Chile

The trophic relationships of 13 intertidal fish species collected in northern Chile (20°18’S and 20°54’S) from July 1997 to July 1998, the stomach content analysis of 820 specimens, were investigated. The importance of the prey items was assessed by means of gravimetric and frequency of ocurrence methods, together with the Shannon-Wiener (trophic diversity) and Pianka (trophic overlap) indexes....

La implementación del Convenio Marco para el Control del Tabaco en Costa Rica: fin a décadas de dominio de la industria

Fecha de recibido: 15 de junio de 2015 • Fecha de aceptado: 29 de septiembre de 2015 Autor de correspondencia: Stanton A. Glantz, PhD. Center for Tobacco Control Research and Education. Room 366 Library, 530 Parnassus. San Francisco, CA 94143-13990 Correo electrónico: [email protected] Crosbie E, Sosa P, Glantz SA. La implementación del Convenio Marco para el Control del Tabaco en Costa ...

Sur la frequence de leptospirose en Iran

Sur la fréquence de leptospirose en Iran

The genealogy of Da. Isabel de Jimenez. An approach to the first phase of admixture in Costa Rica / La genealogia de Da. Isabel de Jimenez. Una aproximacion a la primera fase del mestizaje en Costa Rica

Traditionally the Costa Rican historians and genealogists have interpreted that the Spanish ruling elite emerged after the conquest was exclusively of European origin. On the other side, recent technological advances in Genetics give us the opportunity to approach the study of pedigrees from a new perspective, examining alive people and simultaneously collating the historical information of the...