Papers by Marie-laure Bégout
Thermal imprinting during embryogenesis and future adaptive capacities in European seabass
HAL (Le Centre pour la Communication Scientifique Directe), 2018
Thermal imprinting during embryogenesis and future adaptive capacities in European seabass. 3. In... more Thermal imprinting during embryogenesis and future adaptive capacities in European seabass. 3. International Congress on Applied Ichthyology and Aquatic Environment
Long-term food-exposure to PCB mixtures induces behavioural disruptions in adult Zebrafish and their offspring
HAL (Le Centre pour la Communication Scientifique Directe), Jul 9, 2012
Effects of PCBs on zebrafish behavior
HAL (Le Centre pour la Communication Scientifique Directe), Jul 5, 2010
From model to fisheries species : behavioural studies to reveal the potential effects of contaminant on fish population
HAL (Le Centre pour la Communication Scientifique Directe), Sep 20, 2010
Welfare, Health and Individuality in Farmed FISH: The WINFISH project
Effets de la domestication et de la sélection chez le bar
HAL (Le Centre pour la Communication Scientifique Directe), Nov 25, 2009
Embryonic exposures to chemicals acting on brain aromatase lead to different locomotor effects in zebrafish larvae
Environmental Toxicology and Pharmacology, Sep 1, 2023
Long term food-exposure to PCB mixtures induces reproductive and behavioural disruptions in Zebrafish
HAL (Le Centre pour la Communication Scientifique Directe), May 20, 2012
Bioavailability of benzo[a]pyrene transferred via microplastics to early life-stages of fish through experimental trophic food chains
Physiology & Behavior, Aug 1, 2019
All authors participated in conceiving the study and writing the manuscript. CAS conceptualized, ... more All authors participated in conceiving the study and writing the manuscript. CAS conceptualized, CPF conducted the alkaline extraction of the sediments and did the fluorescence analyses with guidance from CAS. CAS carried out the statistical analysis.
Sexe et croissance précoce chez le bar : des liens très étroits
HAL (Le Centre pour la Communication Scientifique Directe), Jul 5, 2016
Accounting for genetic variability in fitness-related traits using a Dynamic Energy Budget model, an example on European Seabass
HAL (Le Centre pour la Communication Scientifique Directe), Apr 1, 2019
Ecology and Evolution, Nov 4, 2020
HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific r... more HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.
Applied Animal Behaviour Science, Jun 1, 2009
Domestication and selection may affect fish behaviour, sometime as soon as at the first generatio... more Domestication and selection may affect fish behaviour, sometime as soon as at the first generation of domestication. However, knowledge about how both processes impact on fish spatial exploration and swimming activity still is to be improved. The objective of this experiment was (i) to evaluate spatial exploration behaviour and swimming activities of three sea bass strains having different domestication and selection levels and (ii) to analyse their responses to an acute stress. Sea bass exploration and swimming activities were studied before, during and 40 min after a stimulation (standardized fall of an object). The experimental tank was divided in to four zones, and the time spent, the distance travelled in each zone and the swimming complexity were quantified for each period from video recording. Results showed that fish from all strains presented the same flight response and that stimulus exposure induced a significant decrease in exploratory behaviour and swimming activity. The present study has also demonstrated that only one generation of captivity could be sufficient to obtain fish presenting the same behavioural characteristics than fish reared since at least two generations. Moreover, this study has highlighted that selection for growth seemed to select fish characterized by a bolder personality and potentially better adapted to rearing environment. It allowed us to suggest that selection for growth may have a higher effect on fish personality than domestication only.
General and Comparative Endocrinology, Oct 1, 2018
Stress enhances or inhibits neurogenesis in mammals and some fish species. The link between the t... more Stress enhances or inhibits neurogenesis in mammals and some fish species. The link between the two processes is still unclear. Most studies have been performed in very specific stressful or altered environments. Despite the known inter-individual divergence in coping abilities within populations, the relationship between the stress axis and neurogenesis has never been addressed in unstressed individuals. Here we correlate brain expression of the pcna (proliferating cell nuclear antigen) and neurod1 (neurogenic differentiation factor 1) genes, two markers of neurogenesis, with transcripts of cortisol receptors in three fish species living in very distinct environments. Within the three species, individuals with the highest expression of neurogenesis genes were also those that expressed the high levels of cortisol receptors. Based on these correlations and the hypothesis that mRNA levels are proxies of protein levels, we hypothesize that within unstressed animals, individuals sensitive to cortisol perceive a similar environment to be more stimulating, leading to increased neurogenesis. Although it is difficult to determine whether it is sensitivity to cortisol that affects neurogenesis capacities or the opposite, the proposed pathway is a potentially fruitful avenue that warrants further mechanistic experiments. Highlights ► Neurogenesis and cortisol receptors genes positively correlate in brain of fishes. ► Three fish species from different environments show similar patterns. ► Unstressed animals were considered. Please note that this is an author-produced PDF of an article accepted for publication following peer review. The definitive publisher-authenticated version is available on the publisher Web site.
HAL (Le Centre pour la Communication Scientifique Directe), Aug 25, 2018
HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific re... more HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.
Zebrafish, Sep 1, 2013
Wild-type (WT) zebrafish are commonly used in behavioral tests, but the term WT is not a precise ... more Wild-type (WT) zebrafish are commonly used in behavioral tests, but the term WT is not a precise description, and corresponds to many different strains (e.g., AB, TU, WIK, and others). Previous studies compared the physiological, behavioral, or metabolic characteristics of different zebrafish strains (indigenous WT populations versus laboratory WT strains). AB and TU are widely used, but at least one study has demonstrated behavioral differences between them. To choose the most appropriate strain for our experiments, we systematically screened behavioral responses of AB and TU fish in several assays. We analyzed the locomotion activity and responses to a light/dark challenge in adults and larvae, and exploratory behavior and color conditioning in adults. Differences were observed for all tests, the strains displaying particular behavior depending on the tests. As larvae, TU displayed a wider activity range than AB larvae at the onset of locomotor behavior; as adults, TU were more reactive to sudden light transitions and recovered the swimming activity faster in T-maze or homebase release in novel tank tests, whereas AB fish had more contrasted circadian rhythms and performed better in color learning. Strain-specific behavior should be considered when designing experiments using behavior.
Spatial distribution and activity patterns as welfare indicators in response to water quality changes in European sea bass, Dicentrarchus labrax
Applied Animal Behaviour Science, May 1, 2020
Abstract In aquaculture, fish are exposed to unavoidable stressors that can be detrimental for th... more Abstract In aquaculture, fish are exposed to unavoidable stressors that can be detrimental for their health and welfare. However, welfare in farmed fish can be difficult to assess, and, so far, no standardized test has been universally accepted as a welfare indicator. This work contributes to the establishment of behavioural welfare indicators in a marine teleost in response to different water quality acute stressors. Groups of ten fish were exposed to high Total Ammonia Nitrogen concentration (High TAN, 18 mg.L-1), Hyperoxia (200 % O2 saturation), Hypoxia (20 % O2 saturation), or control water quality (100% O2 saturation and TAN
Microplastics exposures of fish: internalization and effects on behavior and growth
HAL (Le Centre pour la Communication Scientifique Directe), May 13, 2018
Awareness of the presence of microplastics, i.e. plastic particles ranging in size from 1 μm to 5... more Awareness of the presence of microplastics, i.e. plastic particles ranging in size from 1 μm to 5 mm, in marine and freshwaters has recently risen but detection and quantification is challenging. Furthermore, whether they pose a risk to aquatic organisms is not yet clear. Fish, for example, have been demonstrated to ingest microplastics particles but the link between quantification of uptake and impact assessment has not yet been made. In this context, we are exploring methods for particles quantification upon feeding juvenile fish with regular food and microplastics and assess whether exposure impacts behavior and growth. For quantification of uptake, we hypothesized that it is possible to analyze the fish tissue by flow cytometry in combination with viSNE, which allows the 2D clustering of particles with different features according to the fluorescence measured. Exposure experiments were carried out for up to three weeks, using different types of microplastic particles and a wide concentration range. In the flow, when particles were mixed with fish tissue, flow cytometry/viSNE was able to differentiate particles natures, numbers and sizes. About 10% of added particles were internalized by the fish from all particles that floated or settled on the bottom. Particles ingestion resulted in a slight impact on behavior. Yet, floating particles were massively incorporated by the fish and significant numbers remained even after 24h of depuration. Based on this, we are currently exploring if continuous feeding with microparticles contaminated food has consequences on juvenile fish growth. Taken together, our study demonstrates the power and limits of flow cytometry/viSNE for microplastics quantification in a complex biological matrix like fish.The setup could be extended to other types and forms of microplastics in different environmental matrices. Moreover, our study sheds light on ecological consequences that microplastics exposure might have on fish.
PLOS ONE, Mar 23, 2023
Human-induced climate change impacts the oceans, increasing their temperature, changing their cir... more Human-induced climate change impacts the oceans, increasing their temperature, changing their circulation and chemical properties, and affecting marine ecosystems. Like most marine species, sole has a biphasic life cycle, where one planktonic larval stage and juvenile/adult stages occur in a different ecological niche. The year-class strength, usually quantified by the end of the larvae stage, is crucial for explaining the species' recruitment. We implemented an experimental system for rearing larvae under laboratory conditions and experimentally investigated the effects of temperature and feeding frequencies on survival, development (growth), and metamorphosis success of S. solea larvae. Specific questions addressed in this work include: what are the effects of feeding regimes on larvae development? How does temperature impact larvae development? Our results highlight that survival depends on the first feeding, that the onset of metamorphosis varies according to rearing temperature and that poorly fed larvae take significantly longer to start (if they do) metamorphosing. Moreover, larvae reared at the higher temperature (a +4˚C scenario) showed a higher incidence in metamorphosis defects. We discuss the implications of our results in an ecological context, notably in terms of recruitment and settlement. Understanding the processes that regulate the abundance of wild populations is of primary importance, especially if these populations are living resources exploited by humans.
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Papers by Marie-laure Bégout