Jorge Molina - Academia.edu (original) (raw)

Papers by Jorge Molina

Research paper thumbnail of Spatial and temporal distribution of Gymnorhamphichthys rondoni (Gymnotiformes: Rhamphichthyidae) in a long-term study of an Amazonian terra firme stream, Leticia - Colombia

Neotropical Ichthyology, 2019

Weakly electric fishes continually emit electric organ discharges (EOD) as a means of communicati... more Weakly electric fishes continually emit electric organ discharges (EOD) as a means of communication and localization of objects in their surroundings. Depending on water conductivity, the amplitude of the electric field generated is known to increase with decreases in electrical conductivity of the water. In Amazonian terra firme streams, water conductivity is extremely low and fluctuates constantly due to local and regional rains. In this context, the space between freely moving weakly electric fishes may be expected to decrease, on average, with an increase in water conductivity. To test this hypothesis, we recorded the positions at rest of the sand-dwelling fish Gymnorhamphichthys rondoni in a terra firme stream for several days in alternating months, over two years. Based on daily nearest neighbor distances among individual fish in a grid, we found a uniform temporal distribution pattern (which was not affected by water conductivity) indicative of site fidelity. Here we highligh...

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Research paper thumbnail of Asymmetrical Competition between Aedes aegypti and Culex quinquefasciatus (Diptera: Culicidae) Coexisting in Breeding Sites

Insects, Jan 24, 2017

Aedes aegypti and Culex quinquefasciatus are mosquito vectors for several tropical diseases that ... more Aedes aegypti and Culex quinquefasciatus are mosquito vectors for several tropical diseases that represent a current public health problem. The ecological requirements for each species are different, however, both species show high biological adaptability, which promotes their coexistence in the same breeding sites. The purpose of this study was to assess the effect of larval association between Ae. aegypti and Cx. quinquefasciatus under different laboratory conditions of food supply and temperature, and under field simulated conditions like peridomestic containers. Our findings showed that under field simulated conditions there was no asymmetrical competition in mixed cultures with the different Cx. quinquefasciatus/Ae. aegypti ratios tested. However, under laboratory conditions in which different doses of food supply were evaluated, it was observed that competition between the two species takes place. Larval coexistence under food scarcity conditions (0.95 mg/larva) showed that Ae...

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Research paper thumbnail of Biodiversity, ecology, and behavior of the recently discovered insect order Mantophasmatodea

Frontiers in Zoology, 2014

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Research paper thumbnail of Seasonality of Lutzomyia fairtigi (Diptera: Psychodidae: Phlebotominae), a species endemic to Eastern Colombia

Memórias do Instituto Oswaldo Cruz, 2008

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Research paper thumbnail of Mapas preliminares de la distribución de especies de Anopheles vectores de malaria en Colombia

…, 2001

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Research paper thumbnail of Learning to distinguish Insects from other arthropods with immersive virtual reality

Revista Colombiana de Computación, 2021

Insects are necessary for the prevalence of ecosystems. Insects belong to a group of animals call... more Insects are necessary for the prevalence of ecosystems. Insects belong to a group of animals called "Arthropods." Many people ignore how to distinguish them, thus feeling afraid of these animals because of their appearance and usually hurting them. This study explores Immersive Virtual Reality (IVR) as an educational tool focused on allowing users to deduce a rule to distinguish between insects and other arthropods. In total, 21 under graduated students participated in this study. The results indicate that students feel confident when interacting with virtual insects and manage to complete the experience, even when they were afraid of these animals. It is also evident the teacher's importance to guide in interpreting the information that is being received.

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Research paper thumbnail of Towards Covid-19 Literacy

Science & Education, 2021

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Research paper thumbnail of Using Historical Scientific Controversies to Promote Undergraduates’ Argumentation

Science & Education, 2020

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Research paper thumbnail of Effect of the physiognomy of Attalea butyracea (Arecoideae) on population density and age distribution of Rhodnius prolixus (Triatominae)

Parasites & Vectors, 2015

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Research paper thumbnail of Using the Controversy over Human Race to Introduce Students to the Identification and the Evaluation of Arguments

Science & Education, 2021

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Research paper thumbnail of Promoting undergraduates’ awareness of the importance of thinking critically about false or inaccurate scientific information presented in news articles

Revista Eureka sobre enseñanza y divulgación de las ciencias., 2019

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Research paper thumbnail of Fauna de insectos hematófagos del sur del Parque Natural Nacional Chiribiquete, Caquetá, Colombia

Biomédica, 2000

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Research paper thumbnail of Risks associated with dispersive nocturnal flights of sylvatic Triatominae to artificial lights in a model house in the northeastern plains of Colombia

Parasites & vectors, Jan 19, 2015

Control initiatives and continuous surveillance of vector-borne transmission have proved to be ef... more Control initiatives and continuous surveillance of vector-borne transmission have proved to be effective measures for diminishing the incidence of Chagas disease in endemic countries. However, the active dispersal of infected sylvatic adult triatomines by flight represents one of the main obstacles to eliminating domestic transmission. In order to determine the risk that active dispersal of sylvatic adult triatomines represents in Colombian northeastern plains, we quantified the distribution and abundance of triatomines in palm trees (primarily Attalea butyracea) using live bait traps. Directional light traps were used to estimate the frequency of sylvatic triatomine dispersal and their possible origin. Finally, the effect of environmental parameters and artificial light sources on the take-off of sylvatic Rhodnius prolixus was evaluated in field experiments. R. prolixus was found in 90 % of the palm trees that densely aggregated toward the northern portion of the study area. R. pro...

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Research paper thumbnail of Distribución actual e importancia epidemiológica de las especies de triatominos (Reduviidae: Triatominae) en Colombia

Biomédica, 2000

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Research paper thumbnail of Behavioral fever response in Rhodnius prolixus (Reduviidae: Triatominae) to intracoelomic inoculation of Trypanosoma cruzi

Revista da Sociedade Brasileira de Medicina Tropical, 2016

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Research paper thumbnail of Novel repellents for the blood-sucking insects Rhodnius prolixus and Triatoma infestans, vectors of Chagas disease

BackgroundStudying the behavioral response of blood-sucking, disease-vector insects to potentiall... more BackgroundStudying the behavioral response of blood-sucking, disease-vector insects to potentially repellent volatile compounds could shed light on the development of new control strategies. Volatiles released by human facial skin microbiota play different roles in the host-seeking behavior of triatomines. We assessed the repellency effect of such compounds of bacterial origin on Triatoma infestans and Rhodnius prolixus, two important vectors of Chagas disease in Latin America.MethodsUsing an exposure device, insects were presented to human odor alone (negative control) and in the presence of three individual tested compounds (2-mercaptoethanol, dimethyl sulfide and 2-phenylethanol, which was only tested in R. prolixus) and the gold-standard repellent NN-diethyl-3-methylbenzamide–DEET (positive control). We quantified the time the insects spent in the proximity of the host and performed nonparametric statistical tests to determine if any of the compounds evaluated affected the behav...

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Research paper thumbnail of Behavioral responses of Rhodnius prolixus to volatile organic compounds released in vitro by bacteria isolated from human facial skin

PLoS neglected tropical diseases, Apr 23, 2018

Previous studies have demonstrated the role of volatile organic compounds (VOCs) produced by skin... more Previous studies have demonstrated the role of volatile organic compounds (VOCs) produced by skin microbiota in the attraction of mosquitoes to humans. Recently, behavioral experiments confirmed the importance of VOCs released by skin microbiota in the attraction of Rhodnius prolixus (Hemiptera: Triatominae), a vector of Chagas disease. In this study, we screened for VOCs released in vitro by bacteria isolated from human facial skin that were able to elicit behavioral responses in R. prolixus. The VOCs released in vitro by eight bacterial species during two growth phases were tested with adult Rhodnius prolixus insects using a dual-choice "T"-shaped olfactometer. In addition, the VOCs released by the bacteria were analyzed with headspace solid-phase microextraction gas chromatography-mass spectrometry (HS-SPME-GC-MS). The VOCs produced by Staphylococcus capitis 11C, Staphylococcus warneri and Staphylococcus epidermidis 1 were attractive to R. prolixus, while the VOCs relea...

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Research paper thumbnail of Behavioural responses to human skin extracts and antennal phenotypes of sylvatic first filial generation and long rearing laboratory colony Rhodnius prolixus

Memórias do Instituto Oswaldo Cruz, 2011

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Research paper thumbnail of Yeast Smell Like What They Eat: Analysis of Volatile Organic Compounds of Malassezia furfur in Growth Media Supplemented with Different Lipids

Molecules, 2019

Malassezia furfur is part of the human skin microbiota. Its volatile organic compounds (VOCs) pos... more Malassezia furfur is part of the human skin microbiota. Its volatile organic compounds (VOCs) possibly contribute to the characteristic odour in humans, as well as to microbiota interaction. The aim of this study was to investigate how the lipid composition of the liquid medium influences the production of VOCs. Growth was performed in four media: (1) mDixon, (2) oleic acid (OA), (3) oleic acid + palmitic acid (OA+PA), and (4) palmitic acid (PA). The profiles of the VOCs were characterized by HS-SPME/GC-MS in the exponential and stationary phases. A total number of 61 VOCs was found in M. furfur, among which alkanes, alcohols, ketones, and furanic compounds were the most abundant. Some compounds previously reported for Malassezia (γ-dodecalactone, 3-methylbutan-1-ol, and hexan-1-ol) were also found. Through our experiments, using univariate and multivariate unsupervised (Hierarchical Cluster Analysis (HCA) and Principal Component Analysis (PCA)) and supervised (Projection to Latent ...

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Research paper thumbnail of Turbo-taxonomy to assemble a megadiverse lichen genus: seventy new species of Cora (Basidiomycota: Agaricales: Hygrophoraceae), honouring David Leslie Hawksworth’s seventieth birthday

Fungal Diversity, 2016

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Research paper thumbnail of Spatial and temporal distribution of Gymnorhamphichthys rondoni (Gymnotiformes: Rhamphichthyidae) in a long-term study of an Amazonian terra firme stream, Leticia - Colombia

Neotropical Ichthyology, 2019

Weakly electric fishes continually emit electric organ discharges (EOD) as a means of communicati... more Weakly electric fishes continually emit electric organ discharges (EOD) as a means of communication and localization of objects in their surroundings. Depending on water conductivity, the amplitude of the electric field generated is known to increase with decreases in electrical conductivity of the water. In Amazonian terra firme streams, water conductivity is extremely low and fluctuates constantly due to local and regional rains. In this context, the space between freely moving weakly electric fishes may be expected to decrease, on average, with an increase in water conductivity. To test this hypothesis, we recorded the positions at rest of the sand-dwelling fish Gymnorhamphichthys rondoni in a terra firme stream for several days in alternating months, over two years. Based on daily nearest neighbor distances among individual fish in a grid, we found a uniform temporal distribution pattern (which was not affected by water conductivity) indicative of site fidelity. Here we highligh...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Asymmetrical Competition between Aedes aegypti and Culex quinquefasciatus (Diptera: Culicidae) Coexisting in Breeding Sites

Insects, Jan 24, 2017

Aedes aegypti and Culex quinquefasciatus are mosquito vectors for several tropical diseases that ... more Aedes aegypti and Culex quinquefasciatus are mosquito vectors for several tropical diseases that represent a current public health problem. The ecological requirements for each species are different, however, both species show high biological adaptability, which promotes their coexistence in the same breeding sites. The purpose of this study was to assess the effect of larval association between Ae. aegypti and Cx. quinquefasciatus under different laboratory conditions of food supply and temperature, and under field simulated conditions like peridomestic containers. Our findings showed that under field simulated conditions there was no asymmetrical competition in mixed cultures with the different Cx. quinquefasciatus/Ae. aegypti ratios tested. However, under laboratory conditions in which different doses of food supply were evaluated, it was observed that competition between the two species takes place. Larval coexistence under food scarcity conditions (0.95 mg/larva) showed that Ae...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Biodiversity, ecology, and behavior of the recently discovered insect order Mantophasmatodea

Frontiers in Zoology, 2014

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Seasonality of Lutzomyia fairtigi (Diptera: Psychodidae: Phlebotominae), a species endemic to Eastern Colombia

Memórias do Instituto Oswaldo Cruz, 2008

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Mapas preliminares de la distribución de especies de Anopheles vectores de malaria en Colombia

…, 2001

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Learning to distinguish Insects from other arthropods with immersive virtual reality

Revista Colombiana de Computación, 2021

Insects are necessary for the prevalence of ecosystems. Insects belong to a group of animals call... more Insects are necessary for the prevalence of ecosystems. Insects belong to a group of animals called "Arthropods." Many people ignore how to distinguish them, thus feeling afraid of these animals because of their appearance and usually hurting them. This study explores Immersive Virtual Reality (IVR) as an educational tool focused on allowing users to deduce a rule to distinguish between insects and other arthropods. In total, 21 under graduated students participated in this study. The results indicate that students feel confident when interacting with virtual insects and manage to complete the experience, even when they were afraid of these animals. It is also evident the teacher's importance to guide in interpreting the information that is being received.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Towards Covid-19 Literacy

Science & Education, 2021

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Using Historical Scientific Controversies to Promote Undergraduates’ Argumentation

Science & Education, 2020

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Effect of the physiognomy of Attalea butyracea (Arecoideae) on population density and age distribution of Rhodnius prolixus (Triatominae)

Parasites & Vectors, 2015

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Using the Controversy over Human Race to Introduce Students to the Identification and the Evaluation of Arguments

Science & Education, 2021

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Promoting undergraduates’ awareness of the importance of thinking critically about false or inaccurate scientific information presented in news articles

Revista Eureka sobre enseñanza y divulgación de las ciencias., 2019

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Fauna de insectos hematófagos del sur del Parque Natural Nacional Chiribiquete, Caquetá, Colombia

Biomédica, 2000

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Risks associated with dispersive nocturnal flights of sylvatic Triatominae to artificial lights in a model house in the northeastern plains of Colombia

Parasites & vectors, Jan 19, 2015

Control initiatives and continuous surveillance of vector-borne transmission have proved to be ef... more Control initiatives and continuous surveillance of vector-borne transmission have proved to be effective measures for diminishing the incidence of Chagas disease in endemic countries. However, the active dispersal of infected sylvatic adult triatomines by flight represents one of the main obstacles to eliminating domestic transmission. In order to determine the risk that active dispersal of sylvatic adult triatomines represents in Colombian northeastern plains, we quantified the distribution and abundance of triatomines in palm trees (primarily Attalea butyracea) using live bait traps. Directional light traps were used to estimate the frequency of sylvatic triatomine dispersal and their possible origin. Finally, the effect of environmental parameters and artificial light sources on the take-off of sylvatic Rhodnius prolixus was evaluated in field experiments. R. prolixus was found in 90 % of the palm trees that densely aggregated toward the northern portion of the study area. R. pro...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Distribución actual e importancia epidemiológica de las especies de triatominos (Reduviidae: Triatominae) en Colombia

Biomédica, 2000

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Behavioral fever response in Rhodnius prolixus (Reduviidae: Triatominae) to intracoelomic inoculation of Trypanosoma cruzi

Revista da Sociedade Brasileira de Medicina Tropical, 2016

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Novel repellents for the blood-sucking insects Rhodnius prolixus and Triatoma infestans, vectors of Chagas disease

BackgroundStudying the behavioral response of blood-sucking, disease-vector insects to potentiall... more BackgroundStudying the behavioral response of blood-sucking, disease-vector insects to potentially repellent volatile compounds could shed light on the development of new control strategies. Volatiles released by human facial skin microbiota play different roles in the host-seeking behavior of triatomines. We assessed the repellency effect of such compounds of bacterial origin on Triatoma infestans and Rhodnius prolixus, two important vectors of Chagas disease in Latin America.MethodsUsing an exposure device, insects were presented to human odor alone (negative control) and in the presence of three individual tested compounds (2-mercaptoethanol, dimethyl sulfide and 2-phenylethanol, which was only tested in R. prolixus) and the gold-standard repellent NN-diethyl-3-methylbenzamide–DEET (positive control). We quantified the time the insects spent in the proximity of the host and performed nonparametric statistical tests to determine if any of the compounds evaluated affected the behav...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Behavioral responses of Rhodnius prolixus to volatile organic compounds released in vitro by bacteria isolated from human facial skin

PLoS neglected tropical diseases, Apr 23, 2018

Previous studies have demonstrated the role of volatile organic compounds (VOCs) produced by skin... more Previous studies have demonstrated the role of volatile organic compounds (VOCs) produced by skin microbiota in the attraction of mosquitoes to humans. Recently, behavioral experiments confirmed the importance of VOCs released by skin microbiota in the attraction of Rhodnius prolixus (Hemiptera: Triatominae), a vector of Chagas disease. In this study, we screened for VOCs released in vitro by bacteria isolated from human facial skin that were able to elicit behavioral responses in R. prolixus. The VOCs released in vitro by eight bacterial species during two growth phases were tested with adult Rhodnius prolixus insects using a dual-choice "T"-shaped olfactometer. In addition, the VOCs released by the bacteria were analyzed with headspace solid-phase microextraction gas chromatography-mass spectrometry (HS-SPME-GC-MS). The VOCs produced by Staphylococcus capitis 11C, Staphylococcus warneri and Staphylococcus epidermidis 1 were attractive to R. prolixus, while the VOCs relea...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Behavioural responses to human skin extracts and antennal phenotypes of sylvatic first filial generation and long rearing laboratory colony Rhodnius prolixus

Memórias do Instituto Oswaldo Cruz, 2011

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Yeast Smell Like What They Eat: Analysis of Volatile Organic Compounds of Malassezia furfur in Growth Media Supplemented with Different Lipids

Molecules, 2019

Malassezia furfur is part of the human skin microbiota. Its volatile organic compounds (VOCs) pos... more Malassezia furfur is part of the human skin microbiota. Its volatile organic compounds (VOCs) possibly contribute to the characteristic odour in humans, as well as to microbiota interaction. The aim of this study was to investigate how the lipid composition of the liquid medium influences the production of VOCs. Growth was performed in four media: (1) mDixon, (2) oleic acid (OA), (3) oleic acid + palmitic acid (OA+PA), and (4) palmitic acid (PA). The profiles of the VOCs were characterized by HS-SPME/GC-MS in the exponential and stationary phases. A total number of 61 VOCs was found in M. furfur, among which alkanes, alcohols, ketones, and furanic compounds were the most abundant. Some compounds previously reported for Malassezia (γ-dodecalactone, 3-methylbutan-1-ol, and hexan-1-ol) were also found. Through our experiments, using univariate and multivariate unsupervised (Hierarchical Cluster Analysis (HCA) and Principal Component Analysis (PCA)) and supervised (Projection to Latent ...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Turbo-taxonomy to assemble a megadiverse lichen genus: seventy new species of Cora (Basidiomycota: Agaricales: Hygrophoraceae), honouring David Leslie Hawksworth’s seventieth birthday

Fungal Diversity, 2016

Bookmarks Related papers MentionsView impact