| Biological treatments affect the chemical composition of coffee pulp JBU Rojas, JAJ Verreth, S Amato, EA Huisman Bioresource Technology 89 (3), 267-274, 2003 | 143 | 2003 |
| Tropical agricultural residues and their potential uses in fish feeds: the Costa Rican situation JB Ulloa, JH Van Weerd, EA Huisman, JAJ Verreth Waste management 24 (1), 87-97, 2004 | 107 | 2004 |
| Effect of different chemical treatments on nutritional and antinutritional properties of coffee pulp JBU Rojas, JAJ Verreth, JH Van Weerd, EA Huisman Animal Feed Science and Technology 99 (1-4), 195-204, 2002 | 63 | 2002 |
| Growth of Oreochromis aureus fed with diets containing graded levels of coffee pulp and reared in two culture systems JBU Rojas, JAJ Verreth Aquaculture 217 (1-4), 275-283, 2003 | 50 | 2003 |
| Growth, feed utilization and nutrient digestibility in tilapia fingerlings (Oreochromis aureus Steindachner) fed diets containing bacteria‐treated coffee pulp JB Ulloa R, JAJ Verreth Aquaculture Research 33 (3), 189-195, 2002 | 23 | 2002 |
| Effects of the protein: energy ratio in isocaloric diets on the growth of Cichlasoma managuense (Günther 1869) JBU Rojas, MCJ Verdegem Aquaculture Research 25 (6), 631-637, 1994 | 20 | 1994 |
| The effect of feeding level on growth and survival of jaguar guapote (Cichlasoma managuense) larvae fed Artemia nauplii J Günther, N Galvez-Hidalgo, J Ulloa-Rojas, J Coppoolse, J Verreth Aquaculture 107 (4), 347-358, 1992 | 20 | 1992 |
| Use of coffee pulp as feed ingredient for tilapia culture JBU Rojas PQDT-Global, 2002 | 10 | 2002 |
| Patógenos bacterianos y su resistencia a los antimicrobianos en los cultivos de tilapia en Guatemala J García-Pérez, JB Ulloa-Rojas, S Mendoza-Elvira Uniciencia 35 (2), 46-59, 2021 | 9 | 2021 |
| The growth and feed utilization of Oreochromis aureus fingerlings fed diets with various coffee pulp levels. JU Rojas, JH van Weerd Proc. Fourth Int. Symp. on Tilapia in Aquaculture, K. Fitzsimmons (ed …, 1997 | 9 | 1997 |
| A dietary effect on some cellular and humoral blood parameters of rainbow trout, Oncorhynchus mykiss (Walbaum) C Schippers, JBU Rojas, GHR Booms, MAM Machiels, MCJ Verdegem, ... Aquaculture Research 25 (6), 649-657, 1994 | 9 | 1994 |
| In vitro digestibility and proteases inhibitory effect of several feedstuffs for Parachromis dovii juveniles and P. dovii hybrid larvae S Valverde-Chavarría, CA Álvarez-González, M Brais-Medina, ... Fish physiology and biochemistry 42, 1767-1776, 2016 | 6 | 2016 |
| Changes in digestive enzymes activities during the initial ontogeny of wolf cichlid, Parachromis dovii (Perciformes: Cichlidae) CA Frías-Quintana, CA Álvarez-González, R Guerrero-Zárate, ... Neotropical Ichthyology 17, e180161, 2019 | 5 | 2019 |
| The proteolytic digestive activity and growth during ontogeny of Parachromis dovii larvae (Pisces: Cichlidae) using two feeding protocols. JBUR José R Quirós Orlich, Silvia Valverde Chavarría Fish Physiology and Biochemistry 40, 1253-1261, 2014 | 5 | 2014 |
| Composición, diversidad y abundancia de peces en el embalse Arenal, Guanacaste, Costa Rica JBU Rojas, JC Peña, MM Jamett Revista de Biología Tropical 37 (2), 127-131, 1989 | 5 | 1989 |
| Ontogenia del sistema digestivo del guapote lagunero Parachromis dovii durante el periodo larval y selección de ingredientes para su alimentación S Valverde-Chavarría, CA Álvarez-González, JB Ulloa-Rojas, ... Avances en Nutrición Acuicola, 2013 | 4 | 2013 |
| Bacterial pathogens and their antimicrobial resistance in tilapia culture in Guatemala J García-Pérez, JB Ulloa-Rojas, S Mendoza-Elvira Uniciencia 35 (2), 46-59, 2021 | 3 | 2021 |
| Diversidad de la ictiofauna de la laguna Hule, Costa Rica JP Barquero-González, R Mora-Vargas, J Valerio-Vargas, J Ulloa-Rojas Cuadernos de Investigación UNED 10 (1), 214-220, 2018 | 3 | 2018 |
| The major agricultural wastes and by-products and their potential use in fish culture: a case study in Costa Rica J Ulloa Proceedings of I Congreso Iberoamericano de aprovechamiento de desechos y …, 1997 | 3 | 1997 |
| The proteolytic digestive activity and growth during ontogeny of Parachromis dovii larvae (Pisces: Cichlidae) using two feeding protocols JR Quirós Orlich, S Valverde Chavarría, JB Ulloa Rojas Fish physiology and biochemistry 40, 1253-1261, 2014 | 2 | 2014 |
Silvia Valverde ChavarríaProfesora de Fisiología Animal, Universidad Nacional, Costa RicaDirección de correo verificada de una.cr
