Results 51 to 60 of about 1,114 (162)

Áreas de reproducción de peces migratorios en la cuenca alta del río Magdalena, Colombia

Biota Colombiana, 2014
During the 2011-2012 hydrological cycle, weekly samples were taken to evaluate the reproduction of migratory fishes in the area of influence of the El Quimbo hydroelectric project. This analysis considered the abundance and density of individuals in each
María Isabel Pareja-Carmona, Luz Fernanda Jiménez-Segura, Francisco Antonio Villa-Navarro, Gladys Reinoso-Flórez, Diana María Gualtero-Leal, Víctor Julio Ángel-Rojas   +5 more
doaj   +3 more sources

Border Collision Bifurcations in a Generalized Model of Population Dynamics

Discrete Dynamics in Nature and Society, Volume 2016, Issue 1, 2016., 2016
We analyze the dynamics of a generalized discrete time population model of a two‐stage species with recruitment and capture. This generalization, which is inspired by other approaches and real data that one can find in literature, consists in considering no restriction for the value of the two key parameters appearing in the model, that is, the natural
Lilia M. Ladino, Cristiana Mammana, Elisabetta Michetti, Jose C. Valverde, Xiaohua Ding   +4 more
wiley   +1 more source

Zootechnical Parameters and Enzyme Activity in the Species Brycon moorei (Steindachner 1878)

Fishes, 2023
Brycon moorei is an opportunistic omnivorous species. It is not known what its nutritional requirements are at any stage of its development; this study determined the influence of diet on the zootechnical parameters and enzyme activity of these fish.
Carlos David-Ruales, Débora Machado Fracalossi, Felipe Collazos-Lasso   +2 more
doaj   +1 more source

Dams effects on potamodromous Prochilodus magdalenae: evidence from endocrine response

, 2017
Background. Prochilodus magdalenae is a neotropical fish that synchronizes reproduction with flood river pulses. Methods. We used an endocrine method to test the influence of hydropeaking on hormone production related with reproduction. We analyzed P. magdalenae reproduction in individuals from two sectors of a Neotropical river basin: one with
De Fex-Wolf, Daniela, López-Casas, Silvia, Jiménez-Segura, Luz Fernanda, Pérez-Gallego, Clara María   +3 more
openaire   +1 more source

Uso de perifiton en un sistema de policultivo en agro acuicultura integrada en la comunidad indígena de Jimaín, Sierra Nevada de Santa Marta (Colombia)

Revista de la Facultad de Medicina Veterinaria y de Zootecnia, 2020
Los Sistemas de Agro Acuicultura Integrada (SAAI) han sido estudiados como opción para la producción de pescado en comunidades con recursos limitados. Así mismo, el uso de perifiton se ha convertido recientemente en una alternativa viable por el aporte ...
J. C. Durán-Izquierdo, R. J. Mindiola-Romo, G. A. Wills-Franco, S. C. Pardo-Carrasco, A. P. Muñoz-Ramírez   +4 more
doaj   +1 more source

Comunidad de peces de la ciénaga de Paredes, Magdalena medio, Santander (Colombia) y su asociación con variablesespacio temporales y ambientales

Biota Colombiana, 2016
Entre febrero y diciembre de 2011 se estudió la comunidad de peces de la ciénaga de Paredes, a través de cuatro muestreos, en periodos climáticamente contrastantes y tres ambientes: estación 1, correspondiente a la boca de entrada del caño Peruétano (BCP)
Beatriz H. Mojica-Figueroa, John Jairo Díaz-Olarte   +1 more
doaj   +1 more source

Content of mercury in muscle of some commercial fish species present in eight sampling sites from the Magdalena river basin (low, medium and high) [PDF]

, 2014
Las diversas actividades antrópicas realizadas en las riberas de los sistemas acuáticos han ocasionados graves impactos sobre los organismos que allí habitan, uno de los principales contaminantes que afectan las pesquerías es el mercurio, el cual tiene ...
Lancheros Ascencio, Leidy Johanna
core  

The fish community of the Paredes floodplain lake, Magdalena medio (Santander) and its association with spacio-temporal and environmental variables

Biota Colombiana, 2016
Between february and december of 2011 the fish communities of the ciénaga de Paredes, were studied by four samples in periods contrasting climates, station 1, corresponding to the inlet of the pipe Peruétano (BCP), station 2, Swamp Center (CC) and ...
Beatriz H. Mojica-Figueroa, John Jairo Díaz-Olarte   +1 more
doaj   +1 more source

Electrified rhythms: How hydropower infrastructure transforms hydrosocial relations of riverine communities in the Lower Sogamoso River, Colombia

People and Nature, Volume 8, Issue 3, Page 782-796, March 2026.
Abstract Hydropower dams regulate water flows for millions of downstream inhabitants worldwide, altering water availability. Under a changing climate, flow control is often framed technically and politically as being essential for reducing drought and flood risks. However, it can also disrupt ecological flows, impact livelihoods and erode environmental
Laura Betancur‐Alarcón, Laura Pulgarín‐Morales, Camila Jiménez‐Saénz, Rossella Alba, Tobias Krueger   +4 more
wiley   +1 more source

Optimizing Total Suspended Solids Mitigation in a Data‐Limited Watershed: A Network‐Based Advection–Reaction Model Applied to the Canal del Dique, Colombia

Water Resources Research, Volume 62, Issue 2, February 2026.
Abstract Total Suspended Solids (TSS) significantly degrade water quality by reducing light penetration and oxygen availability, while facilitating the transport of toxic contaminants. Managing TSS in watersheds requires an understanding of both hydrological connectivity and pollutant dynamics; however, these efforts are significantly constrained by ...
Jesus Guzmán Pérez, Javier Montoya Martinez, David Angulo‐Garcia   +2 more
wiley   +1 more source