Potamotrygon magdalenae, una raya perteneciente a la familia Potamotrygonidae distribuida en la cuenca del río Magdalena, es considerada de muy alta prioridad para la investigación en el Plan de Acción Nacional para la Conservación y Manejo de Tiburones, Rayas y Quimeras de Colom...
Autor(es): Martha Patricia Ramirez. Sergio Antonio Lizcano Gutiérrez.
Reproductive phenology of snakes varies widely among species, likely influenced by biotic and abiotic factors related to seasonality. In Neotropical regions, where seasonal variation in temperature and photoperiod is minimal, the factors regulating the reproductive phenology of s...
Autor(es): Martha Patricia Ramirez. DANIELA GARCIA COBOS. ANDREW CRAWFORD.
The effect of hydrogel (0, 3, 6, and 9 g per seedling) on the survival and growth of Cariniana pyriformis seedlings under different water regimes (absence of irrigation, 60% and 100% field capacity) in a sandy loam soil was assessed. The experiment was carried out in an agricultu...
Autor(es): Andres Felipe Castaño. INGRID VANESSA RIOS ANAYA. ANDRES IVAN PRATO SARMIENTO.
An exceptional case of parallel evolution between lizards and eutherian mammals occurs in the evolution of viviparity. In the lizard genus Mabuya, viviparity provided the environment for the evolution of yolk-reduced eggs and obligate placentotrophy. One major event that favored ...
Autor(es): Martha Patricia Ramirez. Nathaly Herna?ndez-D?az. FRANCISCA LEAL CARVAJALINO.
The COVID?19 lockdown provided the opportunity to measure species biodiversity in urban environments under conditions divergent from regular urban rhythms. For 90 days, including weeks of strict lockdown and the subsequent relaxation of restrictions, we measured the presence and ...
Autor(es): Enrique Arbelaez. FELIPE ESTELA. CAMILO ENRIQUE SANCHEZ. DAVID OCAMPO. MICHELLE GARCIA-ARROYO. ALEJANDRO PERLAZA-GAMBOA. CARLOS MARIO WAGNER. IAN MACGREGOR-FORS.
We studied the reproductive phenology of five endemic Eleutherodactylus species that coexist in a mountain rainforest in Cuba and estimated their sex ratios at immature and mature stages. We tested the hypothesis that in Neotropical humid sites, reproductive activity in sympatric...
Autor(es): Martha Patricia Ramirez. GERMAN M. LOPEZ. IRELIS BIGNOTTE GIRO. ANSEL FONG.
Neotropical humid montane forest (HMF) is divided by landform discontinuities which could limit gene flow among populations. The northern Andes is a complex montane system and an excellent region to compare the role of discontinuities dividing HMFs on the phylogeography of bird s...
Autor(es): Enrique Arbelaez. NATALIA TRUJILLO ARIAS.
The COVID-19 lockdowns produced a singular opportunity to perform scientific research in idle cities. The expected changes in urban ecology led us to form a citizen science community which, following standardized protocols, conducted well-structured surveys of birds across Colomb...
Autor(es): Enrique Arbelaez. CAMILO E. SANCHEZ. DAVID OCAMPO. FELIPE A. ESTELA. MICHELLE GARCIA ARROYO. IAN MACGREGOR FORS.
The global lockdown to mitigate COVID-19 pandemic health risks has altered human interactions with nature. Here, we report immediate impacts of changes in human activities on wildlife and environmental threats during the early lockdown months of 2020, based on 877 qualitative rep...
Autor(es): Enrique Arbelaez. AMANDA BATES. RICHARD B. PRIMACK. BRANDY S. BIGGAR. TOMAS J. BIRD. MARY E. CLINTON. RYLAN J. COMMAND. CERREN RICHARDS. MARC SHELLARD. NATHAN R. GERALDI. ORLANDO ACEVEDO-CHARRY. ZUANIA COLON-PIÑEIRO.
The Carib Grackle (Quiscalus lugubris) has recently extended its distribution to montane habitats in the Colombian Andes, including urban areas. Little is known about its reproductive biology in both natural and urban environments. We analyzed the relationship between morphologic...
Autor(es): Martha Patricia Ramirez. Victor Hugo Serrano. YADI X. FIGUEROA. LUISA F. SAAVEDRA.
The Mesoamerican dry forests (MDF), rich in species and in endemic taxa, are distributed nearly continuously nearly continuously along the American Pacific slope from Mexico to Costa Rica; however, several of the bird species inhabiting the MDF show clear phenotypic differentiati...
Autor(es): Enrique Arbelaez. LUIS A. SANCHEZ-GONZALEZ. VICENTE J. CASTILLO. ADOLFO G. NAVARRO.
Estudiamos la fenología reproductiva en tres especies de Pristimantis que coexisten en un bosque de niebla tropical andino en la cordillera Oriental de Colombia. Las poblaciones estaban constituidas principalmente por juveniles, numerosos machos adultos, y pocas hembras adultas r...
Autor(es): Martha Patricia Ramirez. YAMILE GRANADOS PEREZ.
We studied the male reproductive tract of individuals of different body sizes of Caecilia thompsoni to describe morphological characteristics in comparison to other Gymnophiona. The reproductive tract consists of paired testes segmented into chains of primary and secondary lobes,...
Autor(es): Martha Patricia Ramirez. CARLOS ANDRES SERRANO PEREZ.
ABSTRACT Several of the first avifaunal surveys in Colombia were conducted in the lowland moist forests of the Middle Magdalena Valley, but for decades this region has been understudied. We present results of an avifaunal survey in a zone of Cantagallo, Bolívar, Colombia (Jun?J...
Autor(es): Enrique Arbelaez. DANIELA VILLAMIZAR ESCALANTE. NATALIA TRUJILLO ARIAS.
The neotropical genus Mabuya are obligate placentotrophic viviparous lizards, which have a short vitellogenesis that produces microlecithal oocytes and a prolonged time of gestation (9 to 10 months). The hormonal control of female reproductive activity during follicular growth an...
Autor(es): Martha Patricia Ramirez. HERIBERTO BARBOSA MORALES. SALOME RODRIGUEZ CHAPARRO. RODRIGO LUIS SILVA RIBEIRO SANTOS.
Humid tropical forests in Mesoamerica are distributed along the Atlantic slope and, in scattered locations, along the Mexican Pacific slope. These poorly explored Mexican forests include microendemic bird species. Two species in the genus Dendrocolaptes occur in lowland and footh...
Autor(es): Enrique Arbelaez. ADOLFO G. NAVARRO SIGUENZA. R CARLOS ALMAZAN NUNEZ. L ENRIQUE SANCHEZ RAMOS. M FANNY REBON GALLARDO.
We report the first record of the rare Koepcke?s spear-nosed bat Gardnerycteris koepckeae collected outside of Peru, based on morphological and cytochrome b data. The species was found at the National Natural Park Alto Fragua Indi-Wasi, Department of Caquetá, Colombia. This recor...
Autor(es): Javier Enrique Colmenares. DARWIN MANUEL MORALES MARTINEZ. HECTOR EMILIO RAMIREZ CHAVES. Luis Germán Gómez Bernal.
Body mass is one of the most important phenotypic attributes in animal ecology and life history. This trait is widely used in the fields of ecology and macroevolution, since it influences physiology, morphological functions, and a myriad of ecological and social interactions. In ...
Autor(es): Enrique Arbelaez. Victor Hugo Serrano. David Ocampo. Kevin Giancarlo Borja Acosta. Julián Lozano Flórez. Sebastián Cifuentes-Acevedo. Nicholas James Bayly. Angela Patricia Caguazango Castro. Brayan Coral Jaramillo. Diego Cueva. Fernando Forero. Juan Pablo Gómez. Mario Agustin Loaiza. Gustavo A. Londoño. Sergio Losada-Prado. Sebastián Pérez-Peña. Héctor E. Ramírez-Chaves. Jeyson Sanabria-Mejía. Manuel Andrés Sanchez-Martínez. M. Del Socorro Sierra-Buitrago. Juliana Soto. Orlando Acevedo-Charry.
Due to the position of Colombia between Central and South America, and the presence of several ecosystems in its territory, phylogeographic information from populations across this country is fundamental to understand theevolutionary history of widespread Neotropical species. The...
Autor(es): Enrique Arbelaez.
Several scientific reasons support continuing bird collection in Colombia, a megadiverse country with modest science financing. Despite the recognized value of biological collections for the rigorous study of biodiversity, there is scarce information on the monetary costs of spec...
Autor(es): Enrique Arbelaez. Daniela Villamizar. Fernando Rondon.
Pristimantis bacchus is an endangered terrestrial frog, endemic to cloud forests of the northern part of the Cordillera Oriental in the Colombian Andes. The knowledge of its reproductive biology and microhabitat use can offer important information for future conservation programs...
Autor(es): Wilfredo Chinchilla. Victor Hugo Serrano. Martha Patricia Ramirez.
The endocrinological study by immunological methods allows elucidating mechanisms of response to environmental challenges and reproductive regulatory mechanisms in animals. However, it is often overlooked that immunological assays for the detection and quantification of steroid h...
Autor(es): Martha Patricia Ramirez. HERIBERTO BARBOSA MORALES. RODRIGO LUIS SILVA RIBEIRO SANTOS.
Species of the genus Mabuya are barely recognizable because of their highly conservative external morphology, resulting in unstable systematic and taxonomic status. Considering that hemipenial morphology has been extensively used as a useful source of systematic information for s...
Autor(es): Martha Patricia Ramirez. Paola María Sánchez-Martínez. ELSON FERLEY MENESES PELAYO. PEDRO SALES NUNES.
Los anfibios, reptiles y mamíferos del Área de In?uencia del Proyecto Hidroeléctrico Sogamoso, es el resultado de los estudios de línea base realizados desde el año 2009 en las diferentes formaciones vegetales existentes en la cuenca del río Sogamoso, y constituye una contribució...
Autor(es): Martha Patricia Ramirez. Victor Hugo Serrano. Jesús Eduardo Ortega Chinchilla. Raúl Andrés Rodríguez Moreno.
Esta publicación se constituye en un libro de consulta y reconocimiento de insectos, mariposas y escarabajos coprófagos por parte de las poblaciones humanas que conviven con éstas en el día a día, pero también se convierte en una contribución para que las investigaciones básicas ...
Autor(es): Daniel Rafael Miranda. Juliette Gualdrón Díaz. Juan Carlos Rey Velasco.
Aves del Área de Influencia del Proyecto Hidroeléctrico Sogamoso, es el resultado de los estudios de línea base realizados desde el año 2009 en las diferentes formaciones vegetales existentes en la cuenca del río Sogamoso y constituye una contribución al c...
Autor(es): Victor Hugo Serrano. Ricardo Herrera Ordoñez.
Este libro ha sido pensado como uno de los tantos soportes posibles para las clases de sistemática de nivel básico y avanzado, además de servir de repaso a conceptos teóricos generales, pero sobre la base empírica, y no como reemplazo de los libros básicos o avanzados sobre análi...
Autor(es): Daniel Rafael Miranda. Ivonne Janeth Garzón Orduña. Joan Salvador Arias.