The purpose of this investigation was to determine the structure and dynamics of the populations of the oligochate Pontodrilus litoralis on the coasts near the Cabo Rojo Lighthouse in Puerto Rico. During the months of ...

Scanning electron microscopy was used to detect the presence of microorganisms on the internal intestinal surface of Onychochaeta borincana. The intestines of fourteen adult specimens were extracted, washed, and prepared ...

Mayagüez Bay is an area off western Puerto Rico affected by effluents of domestic waste treatment plants and the three major rivers flowing into the region. In either case, anthropogenic factors are seen as contributing ...

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. ...