Results: 48

Interacciones e inestabilidad del plancton en cuatro embalses tropicales con diferente estado trófico en Colombia

Rev. biol. trop; 72 (1), 2024
Resumen Introducción: los embalses deben ser concebidos como un conjunto de interacciones, donde la inestabilidad física, química y biológica determinan cambios en la densidad de las comunidades planctónicas. Objetivo: Evaluar la inestabilidad del fitoplancton y zooplancton y su interacción con...

Phytoplankton from a brackish lagoon in the central region of Veracruz, Mexico

Rev. biol. trop; 72 (1), 2024
Abstract Introduction: The brackish lagoons are ecosystems with great diversity and possibilities for human use. Therefore, the knowledge about phytoplankton needs to be improved to understand its real impact. Objective: To relate the Mandinga's Lagoon phytoplankton to the limnological conditions dur...

Correlation abundance networks for analyzing biological interactions during cyanobacterial blooms

Rev. biol. trop; 72 (1), 2024
Abstract Introduction: Blooms of cyanobacteria are becoming increasingly common, and understanding their dynamics can be crucial for proposing appropriate management strategies. While physical and chemical parameters influencing blooms have been widely studied, less attention has been paid to the susce...

Distribution and abundance of dinoflagellates from the coastal waters of Karachi, Pakistan, northern part of the Arabian Sea

Braz. j. biol; 82 (), 2022
The present study reports on seasonal and spatial variations in diversity, distribution and abundance of dinoflegellates and indicates the presence of HAB species in Pakistan waters. A total of 179 taxa, recorded in this study from offshore and near-shore waters, belong to 41 genera in 26 families and 10...

Spatio-temporal variability in the Cladocera assemblage of a subtropical hypersaline lagoon

Braz. j. biol; 82 (), 2022
Cladocera represent an important zooplankton group because of their seasonal prominence in terms of abundance and their contribution in controlling primary production (phytoplankton). On a global scale, there are few studies on Cladocera in hypersaline environments. The present work aims to evaluate the ...

Zooplankton communities and their relationship with water quality in eight reservoirs from the midwestern and southeastern regions of Brazil

Braz. j. biol; 81 (3), 2021
Abstract Zooplankton are widely recognised as being regulated primarily by predators and food availability. In reservoirs, the quantity and quality of food resources are generally affected by the characteristics of the water, which in turn are controlled by the flow pulse generated by operation of the da...

Ontogenetic change in the diet of Semaprochilodus insignis (Characiformes: Prochilodontidae) during migration between two limnologically distinct environments in the Amazon Basin

Neotrop. ichthyol; 19 (4), 2021
Semaprochilodus insignis is an Amazonian migratory fish species, moving in large shoals between white- and black-water rivers. It has long been classified as a detritivorous fish. However, it is possible that the trophic plasticity of S. insignis could be higher than previously assumed. The objective of ...

Effect of climato-environmental parameters on chlorophyll a concentration in the lower Ganga basin, India

Rev. biol. trop; 69 (1), 2021
Introduction: Chlorophyll a concentration proxies the phytoplankton biomass which directly involves in signifying the production functions of aquatic ecosystem. Thus, it is imperative to understand their spatio-temporal kinetics in lotic environment with reference to regional climatic variabilities in th...

Toxinas Algales en el Mar Argentino: nuevos hallazgos, nuevos desafíos

Acta toxicol. argent; 28 (3), 2020
Resumen Las floraciones de algas nocivas son un problema cada vez más frecuente a nivel mundial que ocasiona severos daños sobre la salud pública, pérdidas económicas en acuicultura, perjuicios al turismo y episodios de mortalidad de poblaciones naturales de peces, aves y mamíferos marinos. Las tox...

Primer reporte de bacterias y dinoflagelados marinos luminiscentes del Parque Nacional Isla del Coco, Costa Rica

Rev. biol. trop; 68 (supl 2), 2020
Introducción: La bioluminiscencia es la capacidad de ciertos organismos para transformar la energía química en energía lumínica mediante varios procesos bioquímicos. Objetivo: El aislamiento e identificación por primera vez de bacterias luminiscentes en agua marina superficial y la identificación...