Effect of sub-chronic dietary L-selenomethionine exposure on reproductive performance of Red Swamp Crayfish, (Procambarus clarkii)
| Autor: | Yong chao Yuan, Ya Liu, Hongying Huang, Jianghua Wang, Dengxiao Zhao, Gu Zemao, Aijie Mo, Mingrui Yuan |
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| Rok vydání: | 2019 |
| Předmět: |
Male
010504 meteorology & atmospheric sciences Health Toxicology and Mutagenesis media_common.quotation_subject Ovary Astacoidea 010501 environmental sciences Toxicology 01 natural sciences Dietary Exposure Selenium Vitellogenins Vitellogenin Animal science Isotopes Hemolymph medicine Animals Humans Reproductive system Selenomethionine 0105 earth and related environmental sciences media_common Procambarus clarkii biology Reproduction General Medicine Crayfish biology.organism_classification Pollution Diet medicine.anatomical_structure Seafood Toxicity biology.protein Female Water Pollutants Chemical |
| Zdroj: | Environmental Pollution. 253:749-758 |
| ISSN: | 0269-7491 |
| Popis: | The effect of selenium (Se) on the reproductive system has been investigated in both humans and vertebrates, but few studies of female fertility and reproduction in invertebrate have been reported. This study is aimed to investigate the effect of SeMet on growth performance and reproductive system after crayfish were fed with graded levels of dietary SeMet (0, 1.49, 3.29, 10.02, 30.27 or 59.8 μg Se/g dry weight) for 60 days. Crayfish treated with the high levels of SeMet (10.02, 30.27 and 59.76 μg Se/g) exhibited decreasing FW and CL in both male and female. Interestingly, Se accumulation was higher in ovary than in other tissues, suggesting that ovary may serve as a target organ for Se accumulation. We found that dietary Se concentration of 10.02 μg Se/g significantly improved the spawning rate, promoted the synchronized spawning, and up-regulated the expressions of mRNA of cdc2 and vitellogenin, with significantly increased E2 and VTG concentrations in hemolymph of female crayfish. However, a marked decrease of the E2 contents and spawning rate was observed in the groups treated with 30.27 and 59.76 μg Se/g diets. In conclusion, the results of this study indicated that the Se had maximum accumulation in ovary, affecting the reproductive capacity by intervening the expression of cdc2 and vitellogenin in the reproductive system. The LOAEL to induce FW was observed in crayfish fed with 10.02 μg Se/g diet, and its value can cause toxicity within the range of natural concentration, so the addition of Se in the feed should be within 10.02 μg Se/g. |
| Databáze: | OpenAIRE |
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