ATLANTIC BLUEFIN TUNA (Thunnus thynnus, L.) LARVAE ANTIOXIDANT MOLECULAR FUNCTIONS INDUCED BY DIETARY SELENIUM IN ROTIFER Brachionus rotundiformis
| Autor: | Wischhusen, P, Betancor, M.B., Sprague, M., Ortega-García, A. (Aurelio), de-la-Gándara, F. (Fernando), Tocher, D.R., Mourente, G. |
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| Rok vydání: | 2022 |
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| Zdroj: | e-IEO. Repositorio Institucional Digital de Acceso Abierto del Instituto Español de Oceanografía instname |
| Popis: | including iodothyronine deiodinases 1, 2 and 3 (dio1, dio2, dio3) was unaffected. Feeding Se enriched rotifers effectively increased Se in ABT larvae tissue. The improved growth observed in Se supplemented treatments might be related to an accelerated development as the flexion index was significantly higher in all Se enriched treatments compared to the non-supplemented control. A similar effect by Se supplementation has been previously described in Senegalese sole (Solea senegalensis) in relation to an enhanced thyroid hormone activity by Se supplementation (Ribeiro et al., 2012). The Se level of 0.10 µg g-1 dw measured in non-supplemented rotifers is below known requirements in fish (Antony Jesu Prabhu et al. 2016). In contrast, rotifers supplemented with the lowest Se level (Se3) contained 4.42 µg Se g-1, which might be sufficient to cover requirements for this mineral as selenoproteins displayed maximum expression in ABT larvae fed this treatment. The increased seleno-enzyme production might have contributed towards an improved antioxidant status in ABT larvae, indicated by a transcriptional downregulation of redox sensitive antioxidant enzymes cat and sod. In conclusion, rotifers without Se enrichment are suboptimal for ABT larvae at first feeding. A dietary Se level of 4.42 µg g-1 dw is recommended as it boosted growth performance and improved the antioxidant status in ABT larvae. |
| Databáze: | OpenAIRE |
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