The intestinal symbiotic relationship between microorganisms and invertebrates is well known. In the case of soil arthropods, the relationship is widely studied, but in earthworms this relation has been only suggested. ...

The objective of this study was to correlate the diversity of aquatic macroinvertebrates with water quality of the Yagüez River in Mayaguez, Puerto Rico. In the year 2005, for a period of eight months (January 27-December ...

Brunfelsia densifolia Krug & Urb. (Solanaceae) is a rare plant, endemic to the Maricao Forest Reserve, of which very little is known. A search for individuals was carried out in the forest, and a study was conducted of its ...

Molecules of DNA are ubiquitous in the environment and a rich source of biological information, but because DNA degrades rapidly in tropical climates studies of ancient DNA in the Caribbean have been limited until recently. ...

El éxito ecológico de muchos insectos en áreas tales como la reproducción, la defensa contra patógenos y el suministro de nutrientes, se relaciona con simbiosis con bacterias del género Streptomyces (Actinobacteria). ...

The neotropical cockroach subfamily Nyctiborinae Kirby, 1904 (Dictyoptera: Ectobiidae) is reviewed. A redescription for the subfamily and eight of its nine genera is undertaken, with emphasis on composition and morphology ...

The subfamily Epinephelinae (Groupers) is a major group of commercially important fishes of the world with 19 species reported from Puerto Rico. The goal of the present study was characterize the diversity of parasites ...

Web building spiders are usually passive predators that do not typically change their location once they are established; this suggests that factors such as vegetation and canopy density could have a significant influence ...

The study of habitat selection and use by an Anolis species on different types of forest formations at different times of day has not been well documented. Interspecific studies have suggested that anoles use and select ...

Tropical dry forests worldwide have a long history of human use, invasion by non-native species and degradation. In Puerto Rico, while overall forest cover has increased due to socioeconomic and land use changes over the ...