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| Registros recuperados: 69 | |
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| Sadoul, Bastien; Alfonso, Sebastien; Bessa, E.; Bouchareb, A.; Blondeau-bidet, E.; Clair, P.; Chatain, Beatrice; Begout, Marie-laure; Geffroy, Benjamin. |
| 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... |
| Tipo: Text |
Palavras-chave: Neurogenesis; Stress; Glucocorticoid receptor; Mineralocorticoid receptor; Hypothalamo-pituitary-interrenal axis. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00444/55560/57164.pdf |
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| Cormier, Bettie; Batel, Anika; Cachot, Jerome; Begout, Marie-laure; Braunbeck, Thomas; Cousin, Xavier; Keiter, Steffen H. |
| As wide-spread pollutants in the marine environment, microplastics (MPs) have raised public concern about potential toxic effects in aquatic organisms, and, among others, MPs were suspected to act as a vector for organic pollutants to biota. The purpose of the present study was to investigate effects by three model pollutants, oxybenzone (BP3), benzo[a]pyrene (BaP), and perfluorooctane sulfonate (PFOS) adsorbed to polyethylene MPs on the basis of a standard assay, the acute fish embryo toxicity test (FET; OECD TG 236) with zebrafish (Danio rerio) supplemented by additional endpoints such as induction of ethoxyresorufin-O-deethylase (EROD) activity, modification of cyp1a gene transcription and changes in larval swimming behavior. FET assays were performed... |
| Tipo: Text |
Palavras-chave: Fish embryotoxicity test (FET); Swimming behavior; EROD; Cyp1a; Perfluorooctane sulfonate; Benzo[a]pyrene; Oxybenzone. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00514/62545/66896.pdf |
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| Carballo, Carlos; Berbel, Concha; Guerrero-cozar, Israel; Jimenez-fernandez, Eduardo; Cousin, Xavier; Begout, Marie-laure; Manchado, Manuel. |
| Internal electronic tagging is a major issue in flatfish species due to the small size of abdominal cavity. In this study, three tag types, referred to as Nonatec, nano and mini, were evaluated in three weight classes of Senegalese sole: small (0.3 g), middle (0.8 g) and large (2.0 g). Tags were injected from the blind side and fish were carefully handled to minimize sharp movements. Tag losses were 8% in the small size class, between 5.2 and 15.1% in the middle size class and 2–4% in the large size class. The mortality rates ranged between 2.0 and 15.0% with the lowest values in the large size class. No negative effects of tags on growth (tagged vs non-tagged fish using a middle size class) were found after 57 days of culture. Four additional trials using... |
| Tipo: Text |
Palavras-chave: Flatfish; PIT-tags; Loss rates; Sex effect; Growth. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00439/55090/56532.pdf |
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| Horri, Khaled; Alfonso, Sebastien; Cousin, Xavier; Munschy, Catherine; Loizeau, Veronique; Aroua, Salima; Begout, Marie-laure; Ernande, Bruno. |
| Polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) are persistent organic pollutants that have been shown to affect fish life-history traits such as reproductive success, growth and survival. At the individual level, their toxicity and underlying mechanisms of action have been studied through experimental exposure. However, the number of experimental studies approaching marine environmental situations is scarce, i.e., in most cases, individuals are exposed to either single congeners, or single types of molecules, or high concentrations, so that results can hardly be transposed to natural populations. In the present study, we evaluated the effect of chronic dietary exposure to an environmentally realistic marine mixture of PCB and... |
| Tipo: Text |
Palavras-chave: Contaminants; Body length; Condition; Fertilization rate; Energy allocation; Trade-off. |
| Ano: 2018 |
URL: http://archimer.ifremer.fr/doc/00396/50694/51450.pdf |
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| Durieux, Eric D. H.; Labonne, Maylis; Begout, Marie-laure; De Pontual, Helene. |
| The common sole Solea solea (L.) is a commercially important and widely distributed flatfish of the North-East Atlantic. For the Bay of Biscay stock, sole nurseries display differences in terms of quantity and quality. In fine the measure of the quality of a habitat for juveniles of a particular species is expressed by the contribution to the recruitment into the adult population. Understanding this connectivity between juvenile and adult habitats, i.e. evaluating the contribution of each nursery to a single adult stock appears essential in terms of stock management. However, this critical link is still missing for the Bay of Biscay sole stock. Determining if nurseries could be discriminated using otolith elemental composition analysis constitutes the... |
| Tipo: Text |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00073/18377/15949.pdf |
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| Vignet, Caroline; Trenkel, Verena; Vouillarmet, Annick; Bricca, Giampiero; Begout, Marie-laure; Cousin, Xavier. |
| Zebrafish were exposed through diet to two environmentally relevant polycyclic aromatic hydrocarbons (PAHs) mixtures of contrasted compositions, one of pyrolytic (PY) origin and one from light crude oil (LO). Monoamine concentrations were quantified in the brains of the fish after six month of exposure. A significant decrease in noradrenaline (NA) was observed in fish exposed to both mixtures, while a decrease in serotonin (5HT) and dopamine (DA) was observed only in LO-exposed fish. A decrease in metabolites of 5HT and DA was observed in fish exposed to both mixtures. Several behavioural disruptions were observed that depended on mixtures, and parallels were made with changes in monoamine concentrations. Indeed, we observed an increase in anxiety in fish... |
| Tipo: Text |
Palavras-chave: Monoamine; Polycyclic aromatic hydrocarbons; Behaviour; Anxiety; Swimming activity; Zebrafish. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00375/48578/48900.pdf |
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| Registros recuperados: 69 | |
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