Vaca Pita., E.L. 2012. “Diversity of condricthyes and osteichthyes in three marine ecosystems: mangrove, coral reef and rocky of the sub-tidal zone at san cristóbal island”. Revista Universidad de Guayaquil. 114, 3 (Sep. 2012), 27–36. DOI:https://doi.org/10.53591/rug.v114i3.464.