1 resultado para Introducción Varios trabajos publicados en los años recientes tratan de profundizar en diversos temas relativos a aspectos socio económicos de la Costa Rica de los inicios de la expansión cafetalera. Resumiremos a continuación nuestras nuevas investiga
em Aquatic Commons
Resumo:
A review and analysis of the exotic fish distribution and introduction is made using bibliographic information. Both lentic and lotic environments were considered. In order to classify the state of the populations, different categories were defined as follow: permanent, probably permanent, reported and unknown. Results show that 15 species were attempted to be introduced from 1904. Only 8 of them arose an successfull aclimatization: raimbow trout, brown trout, lake trout, landlocked salmon, carp, goldfish, and mosquitofish. For the salmonids, ecological features were analized, in order to explain the disappearence or the permanence in some regions. (Document contains 90 pages)
