Nicole Franco León

• Geographic and Environmental engineer
• Geographic at Fundación Omacha

The evaluation of the relationship between morphological predictors and home range size in aquatics mammals has been a tool used to understand the ecological requirements of the species, as well as provide relevant information for the construction of conservation actions and management of populations and aquatics habitats. We evaluated the relation...

The Amazon Basin features a vast network of healthy, free-flowing rivers, which provides habitat for the most biodiverse freshwater fauna of any basin globally. However, existing and future infrastructure developments, including dams, threaten its integrity by diminishing river connectivity, altering flows, or changing sediment regimes, which can i...

El departamento del Guainía posee una extensa red hídrica con ríos importantes como el Guaviare, Guainía e Inírida, en donde, debido a la baja densidad humana han podido prosperar diferentes especies de vertebrados acuáticos como los delfines de río (Inia geoffrensis), las nutrias (Pteronura brasiliensis y Lontra longicaudis), caimanes (Caiman croc...

Los mamíferos son un grupo de vertebrados que se caracterizan por la presencia parcial o total de pelo, además de regular la temperatura corporal, gestar a sus crías y alimentarlas con leche producida en glándulas especializadas. Este grupo faunístico, se ha diversificado y adaptado a los ambientes aéreos, arborícolas, terrestres y acuáticos donde...

Context Identifying the habitat preferences and core areas of Inia geoffrensis activity is essential to design- ing effective strategies for the management and conservation of Amazon River dolphins and their habitats in the Colombian Amazonas River and Orinoco basin. Objectives Quantify the differential use of habitat that Amazon River dolphins ex...

Context Identifying the habitat preferences and core areas of Inia geoffrensis activity is essential to designing effective strategies for the management and conservation of Amazon River dolphins and their habitats in the Colombian Amazonas River and Orinoco basin. Objectives Quantify the differential use of habitat that Amazon River dolphins exhi...

Unsustainable fisheries practices carried out in large parts of the Amazon, Tocantins, and Orinoco basins have contributed to the decline in the populations of the Amazon River dolphins (Inia spp.), considered Endangered by the International Union for Conservation of Nature (IUCN). Amazon River dolphin byproducts are often obtained through unregula...

Los delfines de río son considerados como especies centinelas de los ecosistemas acuáticos donde habitan y buenas indicadoras de su estado de conservación, al ser especies carismáticas permiten a su vez impulsar iniciativas como la observación responsable y el turismo de naturaleza en regiones de la Amazonia y Orinoquia. Desafortunadamente, estas e...

Colombia es el país de las dantas, en sus ecosistemas habitan tres especies (Tapirus bairdii, T. pinchaque y T. terrestris) de la cuatro actuales, a excepción del tapir malayo (T. indicus) que se distribuye solo en el sudeste asiático. Entre las dantas que viven en el continente americano, la especie más ampliamente distribuida es la danta de tierr...

El conflicto humano-vida silvestre es una de las principales causas de pérdida de biodiversidad a nivel mundial y a su vez ocasiona procesos de extinciones locales en los carnívoros. Se ha reportado el control letal en cánidos (lobos), mustélidos (nutrias y comadrejas), úrsidos (osos) y félidos (tigres, leones, leopardos, linces, jaguares, pumas y...

Influencia de los predictores ecológicos sobre el tamaño del rango de hogar de Inia geoffrensis IV Congreso Colombiano de Mastozoología Del 22 - 26 de Noviembre de 2021

Ecología espacial aplicada para la identificación de los usos de hábitat de los delfines del río Amazonas en Colombia IV Congreso Colombiano de Mastozoología ID 164

Análisis espacial de Inia geoffrensis - Una estrategia para identificar áreas potenciales de riesgo de capturas dirigidas ID 175 IV Congreso Colombiano de Mastozoología Del 22-26 de Noviembre de 2021

Context: Identifying the heterogeneity in the habitat use and hotspots of Amazon River dolphin activity is essential to design effective strategies for the management and conservation of these cetaceans and their habitats in the Colombian Amazonas River and Orinoco basin. Objectives: Quantify the differential use of habitat that Amazon River dolphi...

Studying the variables that describe the spatial ecology of threatened species allows us to identify and prioritize areas that are critical for species conservation. To estimate the home range and core area of the Endangered (EN) Amazon river dolphin Inia geoffrensis , 23 individuals (6♀, 17♂) were tagged during the rising water period...

En nuestro planeta, los felinos han recorrido un largo viaje de alrededor de 30 millones de años. En ese tiempo evolutivo, han colonizado diferentes ambientes exceptuando el continente insular de Oceanía y la Antártida. Estos mamíferos, han participado de los más relevantes procesos de diversificación faunisiticos ocurridos en historia geológica de...

Introduction. River dolphins (Inia and Sotalia) have evolved in the different aquatic ecosystems associated with such Amazon rivers as Grande, Iténez - Mamoré, Araguaia - Tocantis and Orinoco. They witness the evolution and transformation processes of these regions over several million years, and have become the top predators of aquatic ecosystems....

South American sub-continent, housed the largest diversity of river dolphins on the planet, here there are two species in the genus Sotalia and three species in the genus Inia. Tonina, present on the Orinoco basin, are exposed to many different anthropogenic threats, such as: the fragmentation and loss of aquatic ecosystems; acoustic contamination;...

En el presente capítulo se consolidan las diferentes investigaciones y acciones de conservación de los delfines de río o toninas (Inia geoffrensis humboldtiana) para el departamento de Arauca a lo largo de más de 26 años de trabajo. Entre los resultados obtenidos se ha logrado identificar 108 individuos a través de la técnica no invasiva de foto id...

In the Amazon and Orinoco basins, mercury has been released from artisanal and industrial gold mining since the Colonial time, as well as a result of deforestation and burning of primary forest, that release natural deposits of methyl mercury, affecting the local aquatic vertebrate fauna. This study reports the presence of mercury in river dolphins...

En el presente estudio se emplearon los tamaños poblacionales de dos géneros de delfines de río (Inia y Sotalia) como indicadores del estado de salud de 23 ecosistemas acuáticos asociados con las cuencas de los ríos Amazonas y Orinoco. La información se recopiló durante 30 expediciones científicas realizadas entre el 2006 y el 2017 en Colombia, Ecu...

The Cingulata is an ancient order of mammals restricted to the Americas that includes 20 extant armadillo species. Only limited information is available about the six species that occur in Colombia. The objective of the present study was to update their distribution, determine which ecoregions they inhabit, and assess the proportion of their range...

Los procesos de diversificación para los delfines de río del género Inia en el subcontinente suramericano han estado determinados por eventos vicariantes, aislamiento de sus poblaciones entre las diferentes cuencas hidrográficas, ocasionados por barreras naturales como rápidos y cascadas. La extensa distribu- ción de Inia geoffrensis humboldtiana e...

Satellite telemetry is a valuable tool to identify the movement patterns and habitat use of river dolphins in South America. A total of 15 dolphins of the genus Inia were tagged in the rivers Tapajós (Brazil), Amazon and Orinoco (Colombia) and San Martín (Bolivia) with transmitters Spot 299A and Spot F-368, connected by Argos satellite (Wildlife Co...

The release of mercury into the environment is causing the pollution of aquatic ecosystems and a number of consequences for fauna, which are yet to be fully understood. Historically, large amounts of mercury have been discharged in the aquatic ecosystems of the Amazon and Orinoquia by the goldmining sector. Additionally, natural mercury deposits ha...

El orden Cingulata constituye el 40% de los xenartros reportados en Colombia. Sin embargo, la información científica para este grupo se encuentra dispersa y no brinda un panorama general de su distribución en el país. El objetivo de este estudio fue establecer la distribución de las seis especies de armadillos en Colombia, determinar en qué ecorreg...

This study reports total mercury concentrations in river dolphins (Inia and Sotalia) in the Amazon and Orinoco river basins. Mercury was analysed in 46 tissue samples of from animals found floating dead (n= 19; 41,3%), stranded (n= 4; 8,7%) and captured for the deployment of satellite transmitters (n= 23; 50%) in the Arauca and Orinoco rivers (Colo...

Satellite telemetry is a valuable tool to identify the movement patterns and habitat use of river dolphins in South America. The collection of satellite tracking data is less laborious and more accurate than other types of follow-up studies such as VHF technology. A total of 15 dolphins of the genus Inia were tagged in the rivers Tapajós (Brazil),...

The South American river dolphins have evolved in the continental aquatic ecosystems of the Amazon, Grande, Iténez- Mamoré, Araguaia-Tocantins and Orinoco rivers. The spatial and temporal distribution and the habitat use of these cetaceans in these systems are determined by distinct environmental characteristics such as precipitation regimes, eleva...

This study reports total mercury concentrations in river dolphins (Inia and Sotalia) in the Amazon and Orinoco river basins. Mercury was analysed in the tissue of animals found floating dead (n= 19, 50%), stranded (n= 4, 10,5%) and captured for the installation of satellite transmitters (n= 15, 39,5%) in the Arauca and Orinoco rivers (Colombia and...

The South American river dolphins have evolved in the continental aquatic ecosystems of the Amazon, Grande, Iténez-Mamoré, Araguaia-Tocantis and Orinoco rivers. The spatial and temporal distribution and the habitat use of these cetaceans do in these systems, are determined by distinct environmental characteristics such as precipitation regimes, ele...