Effects of cadmium exposure during the breeding period on development and reproductive functions in rare minnow (Gobiocypris rarus)
Cadmium is a common reproductive toxin in aquatic systems. Cd exposure of fish species at high concentrations can severely affect the reproductive function of fish. However, the underlying toxicity of cadmium exposure at low concentrations on the reproductive function in parental fish remains unclea...
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Frontiers Media S.A.
2023-04-01
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| Series: | Frontiers in Physiology |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fphys.2023.1163168/full |
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| author | Liangxia Su Huanhuan Li Ning Qiu Yinrui Wu Bing Hu Rui Wang Jun Liu Jianwei Wang |
| author_facet | Liangxia Su Huanhuan Li Ning Qiu Yinrui Wu Bing Hu Rui Wang Jun Liu Jianwei Wang |
| author_sort | Liangxia Su |
| collection | DOAJ |
| description | Cadmium is a common reproductive toxin in aquatic systems. Cd exposure of fish species at high concentrations can severely affect the reproductive function of fish. However, the underlying toxicity of cadmium exposure at low concentrations on the reproductive function in parental fish remains unclear. To investigate the impacts of cadmium exposure on reproductive capability, eighty-one male and eighty-one female rare minnows (Gobiocypris rarus) were exposed to cadmium at 0 (control group), 5 and 10 μg/L for 28 days, and then transferred into clean water to pair spawn. The results showed that cadmium exposure at 5 or 10 μg/L for 28 days in rare minnows could reduce the success rates of pair spawning in parent rare minnows, lessen no-spawning activities, and prolong the time for first spawning. Furthermore, the mean egg production of the cadmium exposure group increased. The fertility rate of the control group was significantly higher than that of the 5 μg/L cadmium exposure group. Anatomical and histological data further revealed that the intensity of atretic vitellogenic follicles significantly increased and spermatozoa vacuolated after cadmium exposure (p < 0.05), but slightly increased the condition factor (CF), and relatively stable gonadosomatic index (GSI) values were also observed in the cadmium exposure groups. These observed results indicated that cadmium exposure at 5 or 10 μg/L affected the reproductive activity of paired rare minnow by accumulating Cd in the gonads, and the effect diminished over time. The reproductive risk of low-dose cadmium exposure to fish species remains a cause for concern. |
| first_indexed | 2024-04-09T13:19:24Z |
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| language | English |
| last_indexed | 2024-04-09T13:19:24Z |
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| series | Frontiers in Physiology |
| spelling | doaj.art-e6f44cc73bd64af2b473ac44ef255b752023-05-11T11:17:52ZengFrontiers Media S.A.Frontiers in Physiology1664-042X2023-04-011410.3389/fphys.2023.11631681163168Effects of cadmium exposure during the breeding period on development and reproductive functions in rare minnow (Gobiocypris rarus)Liangxia Su0Huanhuan Li1Ning Qiu2Yinrui Wu3Bing Hu4Rui Wang5Jun Liu6Jianwei Wang7School of Animal Science and Nutritional Engineering, Wuhan Polytechnic University, Wuhan, ChinaSchool of Animal Science and Nutritional Engineering, Wuhan Polytechnic University, Wuhan, ChinaTianjin Research Institute for Water Transport Engineering, Tianjin, ChinaSchool of Animal Science and Nutritional Engineering, Wuhan Polytechnic University, Wuhan, ChinaFujian Key Laboratory of Special Aquatic Formula Feed, Fuzhou, ChinaSchool of Animal Science and Nutritional Engineering, Wuhan Polytechnic University, Wuhan, ChinaSchool of Animal Science and Nutritional Engineering, Wuhan Polytechnic University, Wuhan, ChinaThe Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei, ChinaCadmium is a common reproductive toxin in aquatic systems. Cd exposure of fish species at high concentrations can severely affect the reproductive function of fish. However, the underlying toxicity of cadmium exposure at low concentrations on the reproductive function in parental fish remains unclear. To investigate the impacts of cadmium exposure on reproductive capability, eighty-one male and eighty-one female rare minnows (Gobiocypris rarus) were exposed to cadmium at 0 (control group), 5 and 10 μg/L for 28 days, and then transferred into clean water to pair spawn. The results showed that cadmium exposure at 5 or 10 μg/L for 28 days in rare minnows could reduce the success rates of pair spawning in parent rare minnows, lessen no-spawning activities, and prolong the time for first spawning. Furthermore, the mean egg production of the cadmium exposure group increased. The fertility rate of the control group was significantly higher than that of the 5 μg/L cadmium exposure group. Anatomical and histological data further revealed that the intensity of atretic vitellogenic follicles significantly increased and spermatozoa vacuolated after cadmium exposure (p < 0.05), but slightly increased the condition factor (CF), and relatively stable gonadosomatic index (GSI) values were also observed in the cadmium exposure groups. These observed results indicated that cadmium exposure at 5 or 10 μg/L affected the reproductive activity of paired rare minnow by accumulating Cd in the gonads, and the effect diminished over time. The reproductive risk of low-dose cadmium exposure to fish species remains a cause for concern.https://www.frontiersin.org/articles/10.3389/fphys.2023.1163168/fullparental effectcadmiumGobiocypris rarusreproduction capabilitytoxicological effect |
| spellingShingle | Liangxia Su Huanhuan Li Ning Qiu Yinrui Wu Bing Hu Rui Wang Jun Liu Jianwei Wang Effects of cadmium exposure during the breeding period on development and reproductive functions in rare minnow (Gobiocypris rarus) Frontiers in Physiology parental effect cadmium Gobiocypris rarus reproduction capability toxicological effect |
| title | Effects of cadmium exposure during the breeding period on development and reproductive functions in rare minnow (Gobiocypris rarus) |
| title_full | Effects of cadmium exposure during the breeding period on development and reproductive functions in rare minnow (Gobiocypris rarus) |
| title_fullStr | Effects of cadmium exposure during the breeding period on development and reproductive functions in rare minnow (Gobiocypris rarus) |
| title_full_unstemmed | Effects of cadmium exposure during the breeding period on development and reproductive functions in rare minnow (Gobiocypris rarus) |
| title_short | Effects of cadmium exposure during the breeding period on development and reproductive functions in rare minnow (Gobiocypris rarus) |
| title_sort | effects of cadmium exposure during the breeding period on development and reproductive functions in rare minnow gobiocypris rarus |
| topic | parental effect cadmium Gobiocypris rarus reproduction capability toxicological effect |
| url | https://www.frontiersin.org/articles/10.3389/fphys.2023.1163168/full |
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