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Cristiano V M Araújo

Cristiano V M Araújo
Spanish National Research Council (CSIC) - Institutte of Marine Sciences of Andalusia (ICMAN) · Ecology and Coastal Management

PhD in Ecotoxicology
New approaches in behavioral ecotoxicology.

About

101
Publications
13,104
Reads
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1,280
Citations
Additional affiliations
December 2021 - February 2022
Spanish National Research Council (CSIC) - Institutte of Marine Sciences of Andalusia (ICMAN)
Position
  • Titular Researcher
January 2019 - November 2021
Spanish National Research Council (CSIC) - Institutte of Marine Sciences of Andalusia (ICMAN)
Position
  • PostDoc Position - Ramón y Cajal
July 2016 - June 2018
Spanish National Research Council (CSIC) - Institutte of Marine Sciences of Andalusia (ICMAN)
Position
  • PostDoc Position - Juan de la Cierva-Incorporación

Publications

Publications (101)
Article
The spread of pesticides in water bodies integrated into agricultural landscapes may prevent some areas from being colonized. In this study, the effects on the colonization responses of D. magna exerted by gradients of realistic environmental concentrations of the pesticides chlorpyrifos, terbuthylazine and their mixtures were tested in a novel mul...
Article
Temperature variations and thermal extremes events caused by climate change can have profound implications for the toxicity of pesticides in aquatic organisms. Using an innovative system (Heterogeneous Multi-Habitat Test System - HeMHAS) that allows the simulation of different scenarios within a spatially heterogeneous landscape, the effects on the...
Article
Full-text available
In spite of the sensitivity of amphibians to contamination, data from fish have been commonly used to predict the effects of chemicals on aquatic life stages. However, recent studies have highlighted that toxicity data derived from fish species may not protect all the aquatic life stages of amphibians. For pesticide toxicity assessment (PTA), EFSA...
Article
Full-text available
Contamination is likely to affect the composition of an ecological landscape, leading to the rupture of ecological connectivity among habitats (ecological fragmentation), which may impact on the distribution, persistence and abundance of populations. In the current study, different scenarios within a spatially heterogeneous landscape were simulated...
Article
Full-text available
As aquatic environments associated with conventional agriculture are exposed to various pesticides, it is important to identify any possible interactions that modify their effects when in a mixture. We applied avoidance tests with Danio rerio, exposing juveniles to three relevant current use pesticides: chlorpyrifos (CPF), chlorothalonil (CTL) and...
Article
Full-text available
The use of non-forced multi-compartmented exposure systems has gained importance in the assessment of the contamination-driven spatial avoidance response. This new paradigm of exposure makes it possible to assess how contaminants fragment habitats, interfering in the spatial distribution and species’ habitat selection processes. In this approach, o...
Article
Full-text available
Environmental contamination is a problem that reduces the quality of ecosystems and may make them unsuitable to accommodate life. As many ecosystems are connected, some organisms avoid the stress from continuous exposure to contaminants by moving towards less disturbed areas. However, the landscapes in which organisms move might vary regarding the...
Article
Full-text available
Water bodies and aquatic ecosystems are threatened by discharges of industrial waters. Ecotoxicological effects of components occurring in untreated and treated wastewaters are often not considered. The use of a linear, multi-compartmented, non-forced, static system constructed with PET bottles is proposed for the quality assessment of treated wate...
Article
Galaxolide (HHCB) and tonalide (AHTN) are polycyclic musk compounds (PMCs) used in household and personal care products that have been included on the list as emerging contaminants of environmental concern due to their ubiquity in aquatic and terrestrial environments. There still exists a dearth of information on the neurotoxicity and endocrine dis...
Poster
Full-text available
Abstract: This study addressed the potential of the polycyclic musk compounds, Galaxolide (HHCB) and Tonalide (AHTN) to alter neuroendocrine activities in marine organisms. The clams Ruditapes philippinarum were exposed for 21 days to 0.005 – 50.00 µg/L of HHCB and AHTN and enzyme activities related to neuroendocrine toxicity (acetylcholineesterase...
Article
Full-text available
The current research investigated the potential environmental risk of the polycyclic musk compounds, Galaxolide® (HHCB) and Tonalide® (AHTN), in the marine environments. These substances are lipophilic, bioaccumulated, and potentially biomagnified in aquatic organisms. To understand the toxicity of HHCB and AHTN, acute toxicity tests were performed...
Preprint
Full-text available
The current research investigated the environmental risk of the polycyclic musk compounds, Galaxolide® (HHCB) and Tonalide® (AHTN), in the marine environments. These substances are lipophilic, bioaccumulated and potentially biomagnified in aquatic organisms. To understand the toxicity of HHCB and AHTN, we performed acute toxicity tests by exposing...
Article
Full-text available
The ability of aquatic organisms to sense the surrounding environment chemically and interpret such signals correctly is crucial for their ecological niche and survival. Although it is an oversimplification of the ecological interactions, we could consider that a significant part of the decisions taken by organisms are, to some extent, chemically d...
Presentation
Full-text available
Sampling of Atyaephyra desmarestii for ecotoxicology studies in the Guadalete River (Cádiz).
Article
The aim of the present study was to assess the risks of four different pharmaceutical active compounds (PhACs; diazepam, metformin, omeprazole and simvastatin). Acute and chronic toxicities were studied using the bacterium Aliivibrio fischeri and the microalgae Pseudokirchneriella subcapitata; while the repellency and attractiveness were assessed b...
Article
Full-text available
Diazinon is one of the insecticides that represent a high risk for Costa Rican estuarine environments due to its widespread use in pineapple plantations. In estuaries, organisms are frequently submitted to stress caused by natural factors (e.g., continuous changes in salinity levels) and, additionally, to stress due to contamination. Therefore, the...
Article
Wastewater discharges from dairy industries can cause a range of harmful effects in aquatic ecosystems, including a decline in biodiversity due to species evasion. Therefore, it is important to know the purification potential of rivers for the removal of pollutants released in dairy wastewater (DWW). The hypothesis adopted in this work was that the...
Article
Brazil is the largest producer of sugarcane, a crop largely dependent on chemical control for its maintenance. The insecticide fipronil and herbicide 2,4-D stand out among the most commonly used pesticides and, therefore, environmental consequences are a matter of concern. The present study aimed to investigate the toxicity mechanisms of Regent® 80...
Chapter
The sunscreens are complex products for protecting the skin of UV radiation. These products contain active ingredients organic and inorganic UV filters. The release of some of these components can provoke negative effects to aquatic ecosystems. The UV filters have shown to be present in environmental compartments (freshwater, wastewater, groundwate...
Conference Paper
Spatial avoidance involves emigration of organisms from a noxious environmental condition to a safer area, thus indicating the aversive character of the samples. The use of the free-choice, non-forced, multi-compartmented exposure system, in which contamination gradients or parches are simulated, have proven to be a suitable approach to assess how...
Article
Contamination by sunscreens has become a serious environmental problem due to the increasing use of these products in coastal regions. Their complex chemical composition supposes an input of different chemical compounds capable of producing toxic effects and repelling organisms. The aim of the current study was to experimentally check the repellenc...
Article
Polycyclic musk compounds have been identified in environmental matrices (water, sediment and air) and in biological tissues in the last decade, yet only minimal attention has been paid to their chronic toxicity in the marine environment. In the present research, the clams Ruditapes philippinarum were exposed to 0.005, 0.05, 0.5, 5 and 50 μg/L of t...
Experiment Findings
Full-text available
Experiment Findings
Full-text available
Article
When shrimps select a habitat, the presence of elements like predators, shelters and contamination might determine if an area is preferred or avoided. We hypothesised that when shrimps are exposed to a situation in which they have to select whether to avoid contamination, seek shelters or protect themselves against predators, they will avoid the si...
Article
Nanoplastics (NPs) have become one of the most serious environmental problems nowadays. The environmental issues linked to NPs are attributed to the effects after ingestion in marine organisms. Due to the incipient and controversial information about the effects of PS NPs on the feeding of organisms, the aim of this work is to assess (i) digestion...
Article
Contamination seems to exert a crucial role in the spatial distribution of some organisms, such as shrimps and fish. Both, especially the freshwater fish Danio rerio and the shrimp Atyaephyra desmarestii, have been tested experimentally for their avoidance response and have showed the ability to escape from toxic effects. As the behavior of avoidin...
Article
The traditional ecotoxicity assays (forced exposure) tend to use organisms that are cultured under controlled conditions or that come from undisturbed ecosystems, with no (or negligible) previous contact with contamination. The same occurs in the non-forced approach, in which organisms are exposed to a contamination gradient and can move between di...
Article
As the exposure of organisms to contaminants can provoke harmful effects, some organisms try to avoid a continuous exposure by using different strategies. The aim of the current study was to assess the ability of the shrimp Palaemon varians to detect a triclosan gradient and escape to less contaminated areas. Two multi-compartmented exposure system...
Article
In contaminated aquatic ecosystems, it is expected that organisms suffer some effects caused by the contaminants. However, for mobile organisms inhabiting heterogeneously contaminated ecosystems, the continuous exposure to contaminants can be avoided by moving to less contaminated habitats. The present study evaluated the habitat selection of the f...
Article
Several pesticides were developed to be repellent to the targeted pest. However, non-target species could also move away from pesticide-contaminated habitats. These populations would face local extinction due to emigration, even without adverse physiological effects on organisms. Little is known about what pesticides cause spatial avoidance and at...
Article
The idea that the hazard of contaminants is exclusively related to their toxic effects does not consider the fact that some organisms can avoid contamination, preventing toxicity. Although inferences about avoidance are made in most behavioral ecotoxicology studies, assessment of the real spatial displacement (organisms moving toward another habita...
Article
Contamination is an important factor for determining the pattern of habitat selection by organisms. Since many organisms are able to move from contaminated to more favorable habitats, we aimed to: (i) verify if the contamination along the river Guadalete (Spain) could generate a chemical barrier, restricting the displacement of freshwater shrimps (...
Article
Aquatic ecosystems receive run-off and discharges from different sources that lead to the accumulation of contaminants such as copper. Besides producing lethal and sub-lethal effects, copper has shown to be aversive to zebrafish (Danio rerio) by triggering avoidance response. The primary aim of the present study was to evaluate how a copper gradien...
Article
Bioassays using the non‐forced exposure approach have shown to be a relevant tool that might complement the traditional ecotoxicological risk assessment. As the non‐forced exposure approach is based on spatial displacement of organisms and the consequent habitat selection processes, the population density might play an important role in the decisio...
Poster
Full-text available
Contaminants of emerging concern consist of a large array of anthropogenic and natural substances such as antibiotics. Recently, the European Union (Decision 2015/495/EU) published a list of antibiotics that deserve special environmental attention to be monitored. Among them, the macrolide; erythromycin is under prioritize evaluation. Phytoplankton...
Article
Lines of evidence used in ecological risk assessment (ERA) are essentially three: chemistry, biology and ecotoxicology. Until now, the fundamental assumption made when measuring ecological risks is that organisms are forcedly exposed to stressors. However, when organisms can avoid disturbed habitats by escaping to less stressful areas, the assumpti...
Article
Erythromycin is an antibiotic employed in the treatment of infections caused by Gram positive microorganisms and the increasing use has made it a contaminant of emerging concern in aqueous ecosystems. Cerium oxide nanoparticles (CeO2 NPs), which are known to have catalytic and antioxidant properties, have also become contaminants of emerging concer...
Article
Although essential to conservation, little is known about how stress intensity can provoke emigration from disturbed habitats and allow recolonisation of those same environments. To demonstrate the applicability of laboratory experiments, we tested two hypotheses empirically using zebrafish response to artificially polluted environments that exhibi...
Poster
Full-text available
The risk of pollutants is carried out in systems with single species, frequently. In order to get more environmental relevance, we have proposed a complex system, with several organisms representing different levels of the food web. The objective is to improve the knowledge of the effect of pollutant as single or mixture of pollutants in more real...
Article
An increasing number of studies have shown the ability of organisms to escape from toxic effects due to contamination, by moving spatially towards less contaminated habitats. However, this issue has been investigated in monospecific scenarios, without considering possible interactions between species during the contamination avoidance process. It i...
Poster
Full-text available
Metallic and oxide metallic nanoparticles (NPs), such as Ag and CeO 2 NPs, have increased their global production because they have been widely used in new applications and consumer products such as textile, personal care product, biomedicine and catalysis. NPs-containing wastes discharged in aquatic systems have produced undesirable effects in man...
Article
Aquatic ecotoxicity assays used to assess ecological risk assume that organisms living in a contaminated habitat are forcedly exposed to the contamination. This assumption neglects the ability of organisms to detect and avoid contamination by moving towards less disturbed habitats, as long as connectivity exists. In fluvial systems, many environmen...
Presentation
Full-text available
Triclosan (TCS) is an emerging contaminant of concern in environmental studies due to its potential adverse effects on fish behavior. Since avoidance has been shown to be a relevant behavioral endpoint, our aims were: (i) to determine if TCS is able to trigger an avoidance response in Poecilia reticulata; (ii) to predict the population immediate de...
Article
Bisphenol A (BPA) is an emerging contaminant widely used in various industrial products. Sublethal toxicity of BPA on aquatic organisms is expected to occur at a concentration of around 500 μg L-1, which is much higher than environmentally realistic concentrations found in water bodies (up to 0.41 μg L-1). However, there is no information concernin...
Chapter
Traditional ecotoxicity testing neglects possible contaminant-driven emigration, thus potentially underestimating ecological risks. A literature survey indicates several aquatic organisms may move away from contaminant-disturbed habitats, even before suffering toxicological effects. If spatial avoidance only occurs at partially lethal contaminant c...
Article
Information on how atrazine can affect the spatial distribution of organisms is non-existent. As this effect has been observed for some other contaminants, we hypothesized that atrazine-containing leachates/discharges could trigger spatial avoidance by the fish Poecilia reticulata and form a chemical barrier isolating upstream and downstream popula...
Article
The use of nanoparticles (NPs), such as Ag and CeO2 NPs, has increased considerably in the last decade due to their importance for the production of engineered nanomaterials applied to new consumer products. This generalized use in everyday products has made the presence of NPs in aquatic systems more frequent and makes them potential environmental...
Article
Triclosan (TCS) is an emerging contaminant of concern in environmental studies due to its potential adverse effects on fish behavior. Since avoidance has been shown to be a relevant behavioral endpoint, our aims were: (i) to determine if TCS is able to trigger an avoidance response in Poecilia reticulata; (ii) to predict the population immediate de...
Chapter
The present essay has as main goal to discuss the risks of the contaminants when their effects are assessed under non-forced aquatic exposure scenarios. Endpoints in ecotoxicology have initially focused on mortality, but promptly evolved to more sensitive and relevant sub-lethal responses, although forced exposures to contamination have continued t...
Chapter
The spatial distribution of the snail Olivella semistriata along the Ecuadorian coast near the city of Manta seems to be influenced by urban discharges. This observation leads us to hypothesize that contamination might determine inhabitable areas for the snails. Therefore, the ability of the snails to detect the local contamination and react by mov...
Book
Full-text available
Latin America is one of the most diverse but also vulnerable regions in the world that is under continuous anthropogenic pressure due to the increasing urban, industrial and agricultural development. Although there are many research groups studying the impacts caused by those pressures, the results and conclusions obtained by many of them are large...
Article
Habitat selection by fish is the outcome of a choice between different stimuli. Typically, the presence of food tends to attract organisms, while contamination triggers an avoidance response to prevent toxic effects. Given that both food and contaminants are not homogeneously distributed in the environment and that food can be available in contamin...
Article
Spatial avoidance is a mechanism by which many organisms prevent their exposure to environmental stressors, namely chemical contaminants. Numerous studies on active avoidance and drift by aquatic organisms, as well as the main approaches used to measure both responses, were reviewed. We put forward a particular recommendation regarding methodologic...
Article
Full-text available
As compared to other aquatic organism groups, relatively few studies have been conducted so far evaluating the toxicity of pesticides to amphibians. This may at least partly be due to the fact that regulations for registering pesticides usually do not require testing amphibians. The sensitivity of amphibians is generally considered to be covered by...
Article
Full-text available
Since mudsnails are able to avoid contaminated sediment and that the contaminants in sediment are not uniformly distributed, the mudsnail Peringia ulvae was exposed to cadmium (Cd) spiked sediment and assessed for avoidance response in a heterogeneous contamination scenario. Four Cd concentrations were prepared and disposed in patches on dishes, wh...
Article
Full-text available
In spite of the importance of microphytobenthos in coastal and freshwater sediment dynamics, little attention has been paid to this group of organisms from an ecotoxicology point of view. In this chapter, a fast survey on microalgal bioassays will be done, the necessity of the development of benthic microalgal bioassays on whole sediments will be p...
Article
Heavymetals are contaminants of great environmental concern due to theirmultiple origins (natural and anthropogenic), the ability to accumulate in organs and tissues, and the deleterious effects they can cause in organisms. Studies on the accumulation of metals in seafood, such as fish, have increased in importance due to the risk for human health...
Article
Fry of the marine fish Rachycentron canadum (cobia) and larvae of the estuarine shrimp Litopenaeus vannamei (whiteleg shrimp) were exposed to a copper gradient which ranged from 0.20 to 1.80 mg Cu/L for the experiments with cobia and from 0.10 to 1.0 mg Cu/L for the experiments with whiteleg shrimp. The experiments focused on the avoidance response...
Chapter
Full-text available
Via the application of agrochemicals, farmers currently guarantee high productivity of fruit and vegetable crops. However, pest reduction using excessive amounts of such chemicals has a negative effect on aquatic organisms. The spray-drift, leaching, run-off or accidental spills occurring during or after application has become a serious and increas...
Article
Full-text available
The feeding behaviour of Peringia ulvae was studied with the aim of assessing its preferential feeding niche (habit) as well as its potential role in controlling or preventing the occurrence of macroalgal blooms. Both these aspects were studied in the Mondego estuary because of the clear long-lasting eutrophication process that favours the growth o...
Article
Contaminants can behave as toxicants, when toxic effects are observed in organisms, as well as habitat disturbers and fragmentors, by triggering avoidance responses and generating less- or uninhabited zones. Drift by stream insects has long been considered a mechanism to avoid contamination by moving to most favorable habitats. Given that explorati...
Article
Several oil spills due to ruptures in the pipeline oil systems have occurred at the Andean paramo. A sample of this crude oil was mixed with water from a nearby Andean lagoon and the toxicity of the soluble fraction was assessed through lethal and avoidance assays with a locally occurring copepod (Boeckella occidentalis intermedia). The integration...