jerome cachot - Academia.edu (original) (raw)

Papers by jerome cachot

Research paper thumbnail of Colinisation and use of estuarine habitats by catadromous fish species: comparison between Seine and Gironde

HAL (Le Centre pour la Communication Scientifique Directe), 2012

Research paper thumbnail of Programme PIREN-Seine - Phase 6 Axe 4 : « Ecologie & Ecotoxicologie » Les déterminants de la qualité écologique du milieu aquatique

HAL (Le Centre pour la Communication Scientifique Directe), 2015

Research paper thumbnail of Transgenerational epigenetic sex determination: Environment experienced by female fish affects offspring sex ratio

Environmental Pollution, 2021

Research paper thumbnail of SturTOP project:Vulnerability and adaptability of the last population of the European Sturgeon (Acipenser sturio) to the environmental stress factors: Temperature, Oxygen, Polluants

SturTOP is a multidisciplinary project launched in 2013 to investigate effects of chemical, therm... more SturTOP is a multidisciplinary project launched in 2013 to investigate effects of chemical, thermal or hypoxic stress conditions on the health, the physiology, the behaviour and the adaptability of the first life stages of the European sturgeon. Experiments will be performed to evaluate responses of embryos and larvae exposed: i) in controlled conditions to environmental ranges of temperatures, oxygen and pollutant mixture, ii) to sediments collected from spawning grounds, iii) in situ. Studied effects will concern the individual fitness i.e. survival, ontogeny and behaviour as well as DNA damage, epigenetic modifications, gene expression and protein expression profiles. The same effects will be studied for 3 month-old farmed sturgeon (age of stocking) exposed in experimental systems which mimic the environmental conditions. In the wild, environmental exposure to pollutants will be evaluated thanks to individual dosimeters and to chemical analysis of stomach content. In a final step...

Research paper thumbnail of Health indicators and contaminant levels of a critically endangered species in the Gironde estuary, the European sturgeon

Environmental Science and Pollution Research, 2019

Research paper thumbnail of Hypoxia tolerance of European sturgeon (Acipenser sturioL., 1758) young stages at two temperatures

Journal of Applied Ichthyology, 2014

Research paper thumbnail of Developmental toxicity of PAH mixtures in fish early life stages. Part II: adverse effects in Japanese medaka

Environmental Science and Pollution Research, Mar 6, 2014

Research paper thumbnail of Use of passive samplers (POCIS and SPMD) for chemical and biological monitoring of wastewater advanced treatments

HAL (Le Centre pour la Communication Scientifique Directe), Jun 27, 2013

Research paper thumbnail of Evaluation of psychiatric hospital wastewater toxicity: what is its impact on aquatic organisms?

Environmental Science and Pollution Research, Jul 3, 2018

The primary source of pharmaceuticals to the aquatic environment is the discharge of wastewater e... more The primary source of pharmaceuticals to the aquatic environment is the discharge of wastewater effluents. Pharmaceuticals are a large and diverse group of compounds. Among them, psychotropic substances are particularly interesting to study due to their specific known mode of action. The present study was performed to investigate the effects of wastewater effluents from a psychiatric hospital wastewater treatment plant (WWTP) on several aquatic organisms. All the analyzed pharmaceuticals (10 compounds) were detected in WWTP effluents as well as in the receiving river. Although the environmental concentrations were generally at trace levels (ng L −1 to μg L −1), induce toxic effects were observed. This study showed the effects of the WWTP effluents on the oogenesis and/or embryogenesis of amphipod crustacean Gammarus fossarum, Japanese fish medaka Oryzias latipes, mollusk Radix peregra, and planarian Schmidtea polychroa. A decrease of the number of oocytes and produced embryos was observed for G. fossarum and S. polychroa. Similarly, the hatching rate of R. peregra was affected by effluents. In the receiving river, the macroinvertebrate community was affected by the wastewater effluents discharge.

Research paper thumbnail of Mission Tara Microplastics: a holistic set of protocols and data resources for the field investigation of plastic pollution along the land-sea continuum in Europe

Environmental Science and Pollution Research

The Tara Microplastics mission was conducted for 7 months to investigate plastic pollution along ... more The Tara Microplastics mission was conducted for 7 months to investigate plastic pollution along nine major rivers in Europe—Thames, Elbe, Rhine, Seine, Loire, Garonne, Ebro, Rhone, and Tiber. An extensive suite of sampling protocols was applied at four to five sites on each river along a salinity gradient from the sea and the outer estuary to downstream and upstream of the first heavily populated city. Biophysicochemical parameters including salinity, temperature, irradiance, particulate matter, large and small microplastics (MPs) concentration and composition, prokaryote and microeukaryote richness, and diversity on MPs and in the surrounding waters were routinely measured onboard the French research vessel Tara or from a semi-rigid boat in shallow waters. In addition, macroplastic and microplastic concentrations and composition were determined on river banks and beaches. Finally, cages containing either pristine pieces of plastics in the form of films or granules, and others cont...

Research paper thumbnail of ConPhyPoP – A multidisciplinary project to assess physiological consequences of fish long-term exposure to PAHs

HAL (Le Centre pour la Communication Scientifique Directe), May 5, 2013

International audienc

Research paper thumbnail of Direct exposure to PAH-spiked gravels induces developmental defects in <em>Oncorhynchus mykiss</em> early life stages

HAL (Le Centre pour la Communication Scientifique Directe), May 5, 2013

International audienc

Research paper thumbnail of Evaluation des effets écotoxiques des rejets de STEP sur embryons de truite fario (Salmo trutta fario) encagés in situ

Research paper thumbnail of Contamination et physiologie des poissons exposés à des polluants

HAL (Le Centre pour la Communication Scientifique Directe), 2013

Research paper thumbnail of Projet SA6 HQFISH: Impact de la qualité des habitats estuariens de la Seine sur le fonctionnement d'une population de poisson (du recrutement des juvéniles, au processus de maturation)

HAL (Le Centre pour la Communication Scientifique Directe), May 17, 2017

National audienc

Research paper thumbnail of Qualité des Milieux Naturels

L’impact du changement climatique sur la qualite et la pollution des milieux est souvent neglige ... more L’impact du changement climatique sur la qualite et la pollution des milieux est souvent neglige par rapport a d’autres impacts plus mediatises (e.g. evenements climatiques et hydrologiques extremes, sante, trait de cotes, disponibilite des ressources en eau…). Les eaux et l’air de Nouvelle-Aquitaine, et a moindre mesure les sols, deja significativement pollues, subiront pourtant plusieurs deteriorations significatives, qui sont presentees et discutees dans ce chapitre. Certains de ces effets sont deja visibles et vont s’aggraver dans le contexte climatique prevu. Il s’agit principalement, pour l’eau douce superficielle, de l’augmentation de la temperature, de la diminution des debits des cours d’eau, de l’evolution des especes aquatiques et du developpement accru de micro-organismes de type cyanophycees, ou pour l’air, de l’augmentation de l’index pollinique et des effets nefastes croissants sur la sante publique. Bien que non reellement demontres in situ en region, d’autres effets...

Research paper thumbnail of Concentrations and morphology of microplastics in the Seine river estuary

Research paper thumbnail of Microplastic contamination in the Seine River estuary

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. Microplastic contamination in the Seine River estuary Soline Alligant, Johnny Gasperi, Aline Gangnery, Franck Maheux, Benjamin Simon, Marie-Pierre Halm-Lemeille, Maria El Rakwe, Catherine Dreanno, Jerome Cachot, Bruno Tassin

Research paper thumbnail of Pesticide mixture toxicity assessment through in situ and laboratory approaches using embryo-larval stages of the pacific oyster (Magallana gigas)

Marine Environmental Research, 2021

Worsened state of oysters in French Arcachon Bay, demand an investigation of possible causes. Thi... more Worsened state of oysters in French Arcachon Bay, demand an investigation of possible causes. This study evaluated the effects of an environmentally relevant mixture of five common pesticides on the early-life stages of the Pacific oyster (Magallana gigas). Laboratory assays with artificial mixture and in situ transplantation were complementarily used to investigate a series of sublethal endpoints. The laboratory exposure revealed developmental toxicity at 0.32 µg/L, which corresponds to mixture concentrations in Arcachon Bay. Downregulation of some gene transcriptions was observed at environmental level. No difference in larvae development was revealed among the three sites in Arcachon Bay. This study was the first to evaluate locomotion of oyster larvae exposed in situ. Suspected poor water quality in the inner part of Arcachon Bay was reflected by impairment at the molecular level. In conclusion, current concentrations of the tested pesticides in Arcachon Bay hinder larval development and affect several biological functions.

Research paper thumbnail of Subchronic exposure to high-density polyethylene microplastics alone or in combination with chlortoluron significantly affected valve activity and daily growth of the Pacific oyster, Crassostrea gigas

Aquatic Toxicology, 2021

Nowadays, pesticides and microplastics (MPs) are commonly found in coastal waters worldwide. Due ... more Nowadays, pesticides and microplastics (MPs) are commonly found in coastal waters worldwide. Due to their widespread use, their persistence and toxicity, they may induce adverse effects on physiology and behaviour of marine organisms such as the Pacific oyster (Crassostrea gigas). This study explored the growth and valve activity of juvenile oysters exposed for 24 days to two frequently detected pollutants in the Pertuis Charentais (South-West France): an herbicide (chlortoluron, 30 µg.L-1) and high-density polyethylene microparticles (HDPE 20-25 µm, 10 µg MP.L-1) alone or in combinaison. The characterisation of the valve activity of juvenile oysters, recorded by using a High Frequency and Non-Invasive valvometer (HFNI) depended on three parameters: the number of valve micro-closures (VMC), the Valve Opening Amplitude (VOA) and the Valve Opening Duration (VOD). Additionally, daily shell growth and the oyster daily rhythm were assessed. The exposure to MPs of oysters leaded to a significant, increase of VMC and a decrease of VOD and shell growth. The exposure to chlortoluron showed a significant, increase of VOA and a decrease of VMC. In mixture with MPs, chlortoluron still increased VOA and decreased VMC but also reduced the shell growth. Chronobiological analysis did not reveal any effects on the daily rhythm of both contaminants. High experimental concentrations of MP and chlortoluron were tested. This work has underlined their selective impacts on the behavioral and physiological parameters studied.

Research paper thumbnail of Colinisation and use of estuarine habitats by catadromous fish species: comparison between Seine and Gironde

HAL (Le Centre pour la Communication Scientifique Directe), 2012

Research paper thumbnail of Programme PIREN-Seine - Phase 6 Axe 4 : « Ecologie & Ecotoxicologie » Les déterminants de la qualité écologique du milieu aquatique

HAL (Le Centre pour la Communication Scientifique Directe), 2015

Research paper thumbnail of Transgenerational epigenetic sex determination: Environment experienced by female fish affects offspring sex ratio

Environmental Pollution, 2021

Research paper thumbnail of SturTOP project:Vulnerability and adaptability of the last population of the European Sturgeon (Acipenser sturio) to the environmental stress factors: Temperature, Oxygen, Polluants

SturTOP is a multidisciplinary project launched in 2013 to investigate effects of chemical, therm... more SturTOP is a multidisciplinary project launched in 2013 to investigate effects of chemical, thermal or hypoxic stress conditions on the health, the physiology, the behaviour and the adaptability of the first life stages of the European sturgeon. Experiments will be performed to evaluate responses of embryos and larvae exposed: i) in controlled conditions to environmental ranges of temperatures, oxygen and pollutant mixture, ii) to sediments collected from spawning grounds, iii) in situ. Studied effects will concern the individual fitness i.e. survival, ontogeny and behaviour as well as DNA damage, epigenetic modifications, gene expression and protein expression profiles. The same effects will be studied for 3 month-old farmed sturgeon (age of stocking) exposed in experimental systems which mimic the environmental conditions. In the wild, environmental exposure to pollutants will be evaluated thanks to individual dosimeters and to chemical analysis of stomach content. In a final step...

Research paper thumbnail of Health indicators and contaminant levels of a critically endangered species in the Gironde estuary, the European sturgeon

Environmental Science and Pollution Research, 2019

Research paper thumbnail of Hypoxia tolerance of European sturgeon (Acipenser sturioL., 1758) young stages at two temperatures

Journal of Applied Ichthyology, 2014

Research paper thumbnail of Developmental toxicity of PAH mixtures in fish early life stages. Part II: adverse effects in Japanese medaka

Environmental Science and Pollution Research, Mar 6, 2014

Research paper thumbnail of Use of passive samplers (POCIS and SPMD) for chemical and biological monitoring of wastewater advanced treatments

HAL (Le Centre pour la Communication Scientifique Directe), Jun 27, 2013

Research paper thumbnail of Evaluation of psychiatric hospital wastewater toxicity: what is its impact on aquatic organisms?

Environmental Science and Pollution Research, Jul 3, 2018

The primary source of pharmaceuticals to the aquatic environment is the discharge of wastewater e... more The primary source of pharmaceuticals to the aquatic environment is the discharge of wastewater effluents. Pharmaceuticals are a large and diverse group of compounds. Among them, psychotropic substances are particularly interesting to study due to their specific known mode of action. The present study was performed to investigate the effects of wastewater effluents from a psychiatric hospital wastewater treatment plant (WWTP) on several aquatic organisms. All the analyzed pharmaceuticals (10 compounds) were detected in WWTP effluents as well as in the receiving river. Although the environmental concentrations were generally at trace levels (ng L −1 to μg L −1), induce toxic effects were observed. This study showed the effects of the WWTP effluents on the oogenesis and/or embryogenesis of amphipod crustacean Gammarus fossarum, Japanese fish medaka Oryzias latipes, mollusk Radix peregra, and planarian Schmidtea polychroa. A decrease of the number of oocytes and produced embryos was observed for G. fossarum and S. polychroa. Similarly, the hatching rate of R. peregra was affected by effluents. In the receiving river, the macroinvertebrate community was affected by the wastewater effluents discharge.

Research paper thumbnail of Mission Tara Microplastics: a holistic set of protocols and data resources for the field investigation of plastic pollution along the land-sea continuum in Europe

Environmental Science and Pollution Research

The Tara Microplastics mission was conducted for 7 months to investigate plastic pollution along ... more The Tara Microplastics mission was conducted for 7 months to investigate plastic pollution along nine major rivers in Europe—Thames, Elbe, Rhine, Seine, Loire, Garonne, Ebro, Rhone, and Tiber. An extensive suite of sampling protocols was applied at four to five sites on each river along a salinity gradient from the sea and the outer estuary to downstream and upstream of the first heavily populated city. Biophysicochemical parameters including salinity, temperature, irradiance, particulate matter, large and small microplastics (MPs) concentration and composition, prokaryote and microeukaryote richness, and diversity on MPs and in the surrounding waters were routinely measured onboard the French research vessel Tara or from a semi-rigid boat in shallow waters. In addition, macroplastic and microplastic concentrations and composition were determined on river banks and beaches. Finally, cages containing either pristine pieces of plastics in the form of films or granules, and others cont...

Research paper thumbnail of ConPhyPoP – A multidisciplinary project to assess physiological consequences of fish long-term exposure to PAHs

HAL (Le Centre pour la Communication Scientifique Directe), May 5, 2013

International audienc

Research paper thumbnail of Direct exposure to PAH-spiked gravels induces developmental defects in <em>Oncorhynchus mykiss</em> early life stages

HAL (Le Centre pour la Communication Scientifique Directe), May 5, 2013

International audienc

Research paper thumbnail of Evaluation des effets écotoxiques des rejets de STEP sur embryons de truite fario (Salmo trutta fario) encagés in situ

Research paper thumbnail of Contamination et physiologie des poissons exposés à des polluants

HAL (Le Centre pour la Communication Scientifique Directe), 2013

Research paper thumbnail of Projet SA6 HQFISH: Impact de la qualité des habitats estuariens de la Seine sur le fonctionnement d'une population de poisson (du recrutement des juvéniles, au processus de maturation)

HAL (Le Centre pour la Communication Scientifique Directe), May 17, 2017

National audienc

Research paper thumbnail of Qualité des Milieux Naturels

L’impact du changement climatique sur la qualite et la pollution des milieux est souvent neglige ... more L’impact du changement climatique sur la qualite et la pollution des milieux est souvent neglige par rapport a d’autres impacts plus mediatises (e.g. evenements climatiques et hydrologiques extremes, sante, trait de cotes, disponibilite des ressources en eau…). Les eaux et l’air de Nouvelle-Aquitaine, et a moindre mesure les sols, deja significativement pollues, subiront pourtant plusieurs deteriorations significatives, qui sont presentees et discutees dans ce chapitre. Certains de ces effets sont deja visibles et vont s’aggraver dans le contexte climatique prevu. Il s’agit principalement, pour l’eau douce superficielle, de l’augmentation de la temperature, de la diminution des debits des cours d’eau, de l’evolution des especes aquatiques et du developpement accru de micro-organismes de type cyanophycees, ou pour l’air, de l’augmentation de l’index pollinique et des effets nefastes croissants sur la sante publique. Bien que non reellement demontres in situ en region, d’autres effets...

Research paper thumbnail of Concentrations and morphology of microplastics in the Seine river estuary

Research paper thumbnail of Microplastic contamination in the Seine River estuary

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. Microplastic contamination in the Seine River estuary Soline Alligant, Johnny Gasperi, Aline Gangnery, Franck Maheux, Benjamin Simon, Marie-Pierre Halm-Lemeille, Maria El Rakwe, Catherine Dreanno, Jerome Cachot, Bruno Tassin

Research paper thumbnail of Pesticide mixture toxicity assessment through in situ and laboratory approaches using embryo-larval stages of the pacific oyster (Magallana gigas)

Marine Environmental Research, 2021

Worsened state of oysters in French Arcachon Bay, demand an investigation of possible causes. Thi... more Worsened state of oysters in French Arcachon Bay, demand an investigation of possible causes. This study evaluated the effects of an environmentally relevant mixture of five common pesticides on the early-life stages of the Pacific oyster (Magallana gigas). Laboratory assays with artificial mixture and in situ transplantation were complementarily used to investigate a series of sublethal endpoints. The laboratory exposure revealed developmental toxicity at 0.32 µg/L, which corresponds to mixture concentrations in Arcachon Bay. Downregulation of some gene transcriptions was observed at environmental level. No difference in larvae development was revealed among the three sites in Arcachon Bay. This study was the first to evaluate locomotion of oyster larvae exposed in situ. Suspected poor water quality in the inner part of Arcachon Bay was reflected by impairment at the molecular level. In conclusion, current concentrations of the tested pesticides in Arcachon Bay hinder larval development and affect several biological functions.

Research paper thumbnail of Subchronic exposure to high-density polyethylene microplastics alone or in combination with chlortoluron significantly affected valve activity and daily growth of the Pacific oyster, Crassostrea gigas

Aquatic Toxicology, 2021

Nowadays, pesticides and microplastics (MPs) are commonly found in coastal waters worldwide. Due ... more Nowadays, pesticides and microplastics (MPs) are commonly found in coastal waters worldwide. Due to their widespread use, their persistence and toxicity, they may induce adverse effects on physiology and behaviour of marine organisms such as the Pacific oyster (Crassostrea gigas). This study explored the growth and valve activity of juvenile oysters exposed for 24 days to two frequently detected pollutants in the Pertuis Charentais (South-West France): an herbicide (chlortoluron, 30 µg.L-1) and high-density polyethylene microparticles (HDPE 20-25 µm, 10 µg MP.L-1) alone or in combinaison. The characterisation of the valve activity of juvenile oysters, recorded by using a High Frequency and Non-Invasive valvometer (HFNI) depended on three parameters: the number of valve micro-closures (VMC), the Valve Opening Amplitude (VOA) and the Valve Opening Duration (VOD). Additionally, daily shell growth and the oyster daily rhythm were assessed. The exposure to MPs of oysters leaded to a significant, increase of VMC and a decrease of VOD and shell growth. The exposure to chlortoluron showed a significant, increase of VOA and a decrease of VMC. In mixture with MPs, chlortoluron still increased VOA and decreased VMC but also reduced the shell growth. Chronobiological analysis did not reveal any effects on the daily rhythm of both contaminants. High experimental concentrations of MP and chlortoluron were tested. This work has underlined their selective impacts on the behavioral and physiological parameters studied.