Guillermo Duque

• Doctor of Philosophy
• Professor at Universidad Nacional de Colombia, sede Palmira

La contaminación por residuos marinos (RM) ha ido en aumento afectando los ecosistemas costeros. Este estudio tuvo como objetivo analizar la influencia de la variabilidad ambiental espacial y estacional sobre la densidad, masa y composición de los residuos marinos y evaluar el estado de contaminación en playas de la bahía de Buenaventura, Pacifico...

Objetivo: El objetivo de la presente investigación fue evaluar el efecto del ultrasonido en las propiedades fisicoquímicas y concentración de carotenoides de una emulsión elaborada con extracto lipídico de epicarpio de chontaduro. Metodología: El extracto lipídico de epicarpio de chontaduro se utilizó para obtener una emulsión enriquecida de carote...

Contextualización: La bahía de Tumaco es potencialmente receptora de residuos domésticos, lo que conlleva a que diferentes contaminantes como los microplásticos (<5mm) se acumulen en los sedimentos marinos. Vacío de conocimiento: En el Pacifico colombiano no se ha explorado como la emergencia sanitaria (COVID-19) afectó los patrones de contaminació...

Los microplásticos (MP) suponen una gran problemática ambiental para las zonas estuarinas, al estar expuestas a múltiples fuentes de desechos plásticos. En este estudio, se evaluó la influencia espacio-temporal de variables ambientales sobre la abundancia, distribución y tipos de MP en la bahía de Tumaco. Las muestras se recolectaron en épocas de l...

The abundance of microplastic particles may be linked to fish populations through ingestion, due to the presence of debris throughout the marine environment. In this study, the influence of biological characteristics on the ingestion of microplastics was evaluated in 28 species of fish from the Sciaenidae family and 12 from the Ariidae family in th...

Global aquaculture continues to grow, displacing capture fishing, a behavior that is reflected in Colombia through the cultivation of species such as red tilapia (Oreochromis sp.) and rainbow trout (Oncorhynchus mykiss), generating good quality protein for human consumption. However, production generates environmental impacts on water and lake ecos...

Estuaries are the main entry areas of mercury to the marine environment and are important to understand the effect of this contaminant on marine organisms, since it accumulates in the sediments becoming available to enter the food trophic chain. This study aims to determine the environmental variables that mainly influence the spatiotemporal dynami...

La familia de peces Sciaenidae es importante para el comercio y la soberanía alimentaria de los habitantes de la bahía de Tumaco, en el Pacífico colombiano. Sin embargo, hay pocos estudios sobre sus hábitos tróficos en esta bahía. En ese contexto, en este estudio nos propusimos determinar la ecología trófica y la ingesta incidental de microplástico...

Estuaries provide a wide variety of ecosystem services; therefore, they are densely populated coastal regions with high activity and vulnerable to contaminants from natural and anthropogenic sources. The estuary of Buenaventura Bay is environmentally affected by liquid and solid wastes of anthropogenic origin, which arrive through the discharges of...

Contextualización: la pesca artesanal en el Pacífico colombiano se posiciona como una de las principales fuentes de ingresos de las comunidades asentadas en las costas. Existe una fuerte presión en los recursos pesqueros, con artes de pesca poco selectivos como el trasmallo y la línea de anzuelo de mano, capturando individuos que no han presentado...

La acuicultura abastece la producción de proteína animal de forma rentable y sostenible, sin embargo, sus producciones generan cambios a nivel ecológico y ambiental. Para este estudio, se determinaron cambios en la calidad del agua y en los sedimentos relacionados al cultivo de trucha arcoíris (Onchorhynchus mykiss) en el humedal RAMSAR - Lago Guam...

Marine transportation requires maintenance dredging of navigation channels to allow large ships access to inland ports. These dredging activities have repercussions on the benthic habitat, modifying the bottom topography and inducing habitat degradation. In this study, we analyzed the polychaete community composition before, during, and after a mai...

Estuaries are the main entry areas of mercury to the marine environment and are important to understand the effect of this contaminant on marine organisms, since it accumulates in the sediments becoming available to enter the food trophic chain. This study aims to determine the environmental variables that mainly influence the spatiotemporal dynami...

Tropical estuaries are productive dynamic ecosystems where water quality is mediated by physicochemical and biological processes and by fluvial and anthropogenic discharges. The objective of the study was to determine the influence of environmental variables on the spatiotemporal dynamics of water quality in Buenaventura Bay, which is a highly impa...

La cobertura forestal es un elemento de belleza escénica, concepto constitutivo de los servicios del ecosistema cultural (SEC). Su valor estético se aprecia a escala de paisaje, donde la holísticidad cobra importancia en la percepción de los ciudadanos. En esa línea, los árboles y su preservación adquieren una impronta medular para el mejoramiento...

Los lenguados son importantes en el flujo de energía de los estuarios, el cual está influenciado por la dinámica de las variables ecológicas y ambientales de estos ecosistemas. Esta investigación proporciona una evaluación de la influencia que tienen las variaciones ambientales (espaciotemporales) en la dieta de Citharicthys gilberti en la Bahía de...

La contaminación por microplásticos (MP) en los ecosistemas costeros es un grave problema alrededor del mundo. En Colombia existe poca información sobre este contaminante, especialmente para la costa pacífica. Por lo anterior, se determinó la densidad, distribución y tipos de MP en la superficie del agua del estuario de la bahía de Buenaventura, pr...

Introducción: La dinámica de las condiciones ambientales influencia la variación del alimento disponible para los organismos estuarinos, afectando el consumo de alimento de los organismos bentónicos como los lenguados, esenciales para establecer y monitorear la calidad ambiental en estos ecosistemas. Objetivo: Determinar los hábitos tróficos de tr...

The anthropogenic discharges of inorganic nutrients impact water quality, affecting the macroinvertebrate assemblage and food safety. The main objective of this study was to examine the seawater quality and macroinvertebrate dynamics in muddy habitats of Buenaventura Bay, Colombian Pacific. Macroinvertebrates were captured using artisanal trawl net...

The increase in production, consumption and inadequate disposition of plastics has generated an accumulation of these elements in marine ecosystems, which have become important microplastics sinks (< 5 mm). The objective of this research was to determine the temporal and spatial differences in the density, distribution, and type of microplastics in...

In tropical estuaries, fish diversity varies spatially and temporally due to behavioral processes such as reproductive migrations, predator avoidance, and foraging, which are affected by water quality. Eutrophication is one of the main factors affecting water quality in estuaries. The objective of this study was to determine variation in fish assem...

The environmental health of Buenaventura Bay, a highly impacted tropical estuary, is influenced by numerous human activities, including mining upstream. Large- and small-scale fishing plays an important role in the local economy, so we investigated the dynamic processes of bioaccumulation of mercury at basal trophic levels. Four samples were taken...

Three fish assemblages (functional groups according to estuary use) were examined, which presented different responses to environmental variations, mainly associated to the dry and rainy seasons and high and low salinities and temperatures in the Buenaventura Bay estuary, Colombia, Tropical Eastern Pacific. In total, 4674 individuals were collected...

La bahía de Buenaventura es un estuario tropical con una rica diversidad que presenta un alto grado de intervención antrópica, destacándose los cambios en las concentraciones de materia orgánica (MO), la cual provoca desbalances en el ecosistema. Los poliquetos, por su rápida respuesta ante alteraciones ambientales, son situados como organismos con...

Objetivo. Determinar el nivel de impacto ambiental ocasionado por una estación acuícola de producción intensiva de trucha arcoíris (Onchorhynchus mykiss), en sistemas de jaulas flotantes en los nutrientes del agua y macroinvertebrados bentónicos en el Lago Guamuez. Materiales y Métodos. El estudio se desarrolló en tres áreas del Lago Guamuez (dos i...

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En este capítulo se presenta un panorama general sobre el estado actual de Bahía Málaga, así como información de las áreas marinas protegidas, su manejo y efectividad. Se presenta, además, una propuesta de manejo para el área protegida de Bahía Málaga, a partir de los vacíos observados en 163 Ingeniería Ambiental los lineamientos de manejo del par...

En los ecosistemas costeros del Pací co colombiano se ha detectado la presencia del metal en diferentes compartimentos ambientales. El objetivo del presente trabajo fue determinar los niveles de mercurio total (HgT) en plumas y cáscara de huevo de pelícanos (Pelecanus occidentalis) en la Bahía de Buenaventura y en Bahía Málaga. Se realizaron tres c...

En la bahía de Buenaventura el dragado es una de las operaciones de mantenimiento del canal de navegación que debe ser realizada periódicamente. Debido a dicha actividad se generan efectos asociados con variaciones ambientales del hábitat, que influyen en los patrones de distribución y abundancia de los poliquetos. Por tanto, en este trabajo se ana...

El mercurio es un metal persistente que puede causar graves efectos ecológicos en los ecosistemas. El objetivo del presente estudio es relacionar las anormalidades nucleares de los eritrocitos (ENA), la frecuencia de eritrocitos inmaduros (EI) con la concentración de mercurio total (HgT) en peces de la bahía de Buenaventura. Las especies colectadas...

We studied the composition and abundance of benthic mollusks found in La Guajira along the northern Caribbean coast of Colombia. A research cruise was carried out on board the R/V Ancón INVEMAR, from which bottom trawlings were conducted at 10 and 50 m depths. A total of 4840 individuals were collected, and 215 species identified belonging to the c...

In tropical estuaries, most fishes feed at different hours during the day. To determine the daily ration and consumption of the Ciénaga Grande de Santa Marta (CGSM) population of Anchovia clupeoides monthly samplings of a 24 h cycle were taken at the coastal lagoon between October 1995 and June 1996. A total of 4389 specimens were examined. The pop...

An inventory of the sh fauna of the Guajira region was made based on samples collected on a cruise performed between Palomino and Punta Espada along the isobaths of 10 and 50 m, from March 30 to April 8, 2005, on board of the B/I ANCÓN (INVEMAR) research vessel. A total of 3662 specimens were collected, representing 51 families, 113 species, and fo...

El glifosato Roundup es uno de los herbicidas más utilizados en agricultura. Se ha demostrado que este agroquímico puede causar efectos negativos sobre algunas especies vegetales que no son el objetivo de su aplicación. Para determinar su efecto toxicológico se llevó a cabo un experimento con semillas de maíz (Zea mays). Se determinó la dosis media...

Cartagena Bay is a highly productive habitat which supports important aquatic communities and is considered an estuarine environment. During the sampling season, five commercial fish were captured: ladyfish (Elops smithi), machuelo (Opisthonema oglinum), mullet (Mugil incilis), sea bass (Centropomus ensiferus), and corvina (Cynoscion jamaicensis),...

Trophic relationships of five species of commercial interest in Cartagena Bay, Colombian Caribbean. Cartagena Bay is a highly productive habitat which supports important aquatic communities and is considered an estuarine environment. During the sampling season, five commercial fish were captured: ladyfish (Elops smithi), machuelo (Opisthonema oglin...

In Colombia, the bay of Cartagena is one of the coastal ecosystems more influenced by mercury (Hg) contamination. In order to estimate its environmental impact, in this study it was determined methylmercury (MeHg) and total mercury (HgT) in sediment and seston, taking five field samples along 2006 (February, April, June, July, and October) in five...

We studied the composition and abundance of benthic mollusks found in La Guajira along the northern Caribbean coast of Colombia. A research cruise was carried out on board the R/V Ancón INVEMAR, from which bottom trawlings were conducted at 10 and 50 m depths. A total of 4840 individuals were collected, and 215 species identified belonging to the c...

The spatial distribution of seagrass beds depends on environmental factors such as light, temperature, salinity, substrate type, and nutrient availability. There is an extensive area of seagrass beds dominated by Thalassia testudinum along the shallow continental shelf of La Guajira, representing more than 80 % of the seagrass beds in Colombia. In...

Brachyura crustaceans composition and structure assemblage along be continental shelf of La Guajira and its variation according to depth gradient and sediment characteristics were determined. 44 bottom drag samples were taken at 10 and 50 m depth using a semi globe demersal net, during March and April 2005. 83 species belonging to 21 families were...

The spatial distribution of seagrass beds depends on environmental factors such as light, temperature, salinity, substrate type, and nutrient availability. There is an extensive area of seagrass beds dominated by Thalassia testudinum along the shallow continental shelf of La Guajira, representing more than 80 % of the seagrass beds in Colombia. In...

An inventory of the fish fauna of the Guajira region was made based on samples collected on a cruise performed between Palomino and Punta Espada along the isobaths of 10 and 50 m, from March 30 to April 8, 2005, on board of the B/I ANCÓN (INVEMAR) research vessel. A total of 3662 specimens were collected, representing 51 families, 113 species, and...

This paper summarises the principles of satellite radar altimetry and presents this technology's most important applications for analysing continental surface water within an area known as spatial hydrology; generating virtual gauging stations is one of its most important applications (intersection between satellite tracking and bodies of water: ri...

This paper summarises the principles of satellite radar altimetry and presents this technology's most important applications for analysing continental surface water within an area known as spatial hydrology; generating virtual gauging stations is one of its most important applications (intersection between satellite tracking and bodies of water: ri...

In tropical estuaries, most fishes feed at different hours during the day. To determine the daily ration and consumption of the Ciénaga Grande de Santa Marta (CGSM) population of Anchovia clupeoides monthly samplings of a 24 h cycle were taken at the coastal lagoon between October 1995 and June 1996. A total of 4389 specimens were examined. The pop...

Habitat degradation of saltmarsh ecosystems reduces the suitability of the marsh as permanent environments for resident species and seasonal nursery grounds for transient fauna. This study was conducted in Terrebonne-Timbalier bays near Cocodrie, Louisiana. Fishes and macroinvertebrates were collected using a drop sampler in marsh edge and open-...

Food selection by fishes is an important piece of information for modeling food webs in aquatic ecosystem. Monthly collections were made over a twenty-four hour period between October 1995 and June 1996 to examine the feeding selectivity of the zabaleta anchovy (Anchovia clupeoides) in the coastal lagoon Cienaga Grande de Santa Marta, NE Colombia....