Results 51 to 60 of about 539 (132)

Características morfométricas de un lago de plano inundable tropical (ciénaga Hoyo, Los Bagres, Colombia)

Revista Facultad de Ingeniería Universidad de Antioquia, 2011
En este artículo se presentan las características morfométricas de La ciénaga Hoyo Los Bagres (Colombia) y las predicciones de carácter teórico derivadas.
Yimmy Montoya Moreno, Fabio Vélez, Néstor Aguirre Ramírez   +2 more
doaj  

Using environmental DNA to identify priority areas for sawfish conservation in Costa Rica, Central America

Endangered Species Research
Environmental DNA (eDNA) analysis is becoming a valuable conservation tool for detecting rare and threatened species in a variety of aquatic environments, but studies in freshwater and estuarine habitats with high levels of suspended sediment are still ...
JA Valerio-Vargas, MK Cooper, CA Simpfendorfer, M Espinoza   +3 more
doaj   +1 more source

Effects of oligotrophication on fish growth: Insights from a mesocosm experiment

Limnology and Oceanography, Volume 70, Issue S2, Page S392-S403, December 2025.
Abstract Human activities can frequently affect aquatic ecosystems in irreversible ways, with flow regulation and water quality being major concerns. Dams can promote the retention of sediments and nutrients, increase water transparency, and reduce primary productivity, all of which characterize the oligotrophication process.
Juliana Deo Dias, Nadson Ressye Simões, Claudia Costa Bonecker, Angelo Antonio Agostinho   +3 more
wiley   +1 more source

Environmental conditions and carbonate chemistry variability influencing coral reef composition along the Pacific coast of Costa Rica

Frontiers in Marine Science
Coral reef development is influenced by a wide variety of factors, including temperature, salinity, nutrient concentrations, and carbonate chemistry. Studies focusing on physicochemical drivers of coral reef distribution and composition in the Eastern ...
Celeste Sánchez-Noguera, Celeste Sánchez-Noguera, Ines D. Lange, Ines D. Lange, Jorge Cortés, Carlos Jiménez, Christian Wild, Tim Rixen   +7 more
doaj   +1 more source

Connecting a Trophic Model and Local Ecological Knowledge to Improve Fisheries Management: The Case of Gulf of Nicoya, Costa Rica

Frontiers in Marine Science, 2019
Trophic models of the Ecopath with Ecosim (EwE) type and local ecological knowledge (LEK) have widely been applied to fisheries assessment and management.
Astrid Sánchez-Jiménez, Astrid Sánchez-Jiménez, Marie Fujitani, Douglas MacMillan, Achim Schlüter, Matthias Wolff   +5 more
doaj   +1 more source

Variación estructural de la comunidad perifítica colonizadora de sustratos artificiales en la zona de ritral del río Medellín, Colombia

Revista de Biología Tropical, 2007
Se colocaron muestreadores de material acrílico con portaobjetos a nivel subsuperficial en dos estaciones de recolección en la parte alta del río Medellín.
Yimmy Montoya M, John J Ramírez R
doaj  

Effect of native and modified starches on nutritional and physiological performance of wild juveniles of red grouper (Epinephelus morio)

Ecosistemas y Recursos Agropecuarios, 2018
The aim of this study was to evaluate carbohydratesutilization by wild red grouper Epinephelus morio.Juveniles were fed during 93 d on a selection of starches: native raw cornstarch (RCS), waxy cornstarch (WCS), raw potato starch (RPS) and gelatinized ...
Ana Castillo, Leticia Callejas, Carlos Alfonso Álvarez-González, Carlos Maldonado, Gerard Cuzon, Martha Gabriela Gaxiola-Cortés   +5 more
doaj   +1 more source

Hydrochemistry, ostracods and diatoms in a deep, tropical, crater lake in Western Mexico

Journal of Limnology, 2013
Crater lakes are sensitive to natural and anthropogenic environmental changes and it is important to define and understand their current status in order to evaluate past changes related to climate variability and future ones associated with modern global
Margarita Caballero, Alejandro Rodriguez, Gloria Vilaclara, Beatriz Ortega, Priyadarsi Roy, Socorro Lozano-García   +5 more
doaj   +1 more source

Testing the feasibility of coral nurseries in an upwelling area in the North Pacific of Costa Rica

Frontiers in Marine Science
The decline of coral reefs has increased interest in ecological restoration. Due to the scarcity of coral gardening projects in the Eastern Tropical Pacific, improving our understanding of such techniques is key.
Sònia Fabregat-Malé, Sebastián Mena-González, Fabio Quesada-Perez, Juan José Alvarado, Juan José Alvarado, Juan José Alvarado   +5 more
doaj   +1 more source

Human dimensions of harmful algal blooms in coastal Peru: perceived impacts, adaptation, and governance challenges

Frontiers in Marine Science
Harmful algal blooms (HABs) can cause marine fauna mortality, human health risks, and fishery closures, thereby threatening coastal livelihoods. Despite increasing frequency and severity of HABs under climate-related and anthropogenic pressures, their ...
Jelto Makris, Tomasa Cuellar-Martinez, Arturo Aguirre-Velarde, Achim Schlüter, Michael Kriegl, Michael Kriegl   +5 more
doaj   +1 more source