Copper Acute Toxicity Tests with Schizothorax o’connori Lloyd and Schizothorax waltoni Regan: A Biomonitor of Heavy Metal Pollution in a High Altitude Area?

Shao, Jian; Xie, Congxin; Qin, Jian-Hua; Huo, Bin; Luo, Yangzhi

doi:10.1007/s00128-014-1333-3

Cited by 3 publications

(3 citation statements)

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“…Indeed, it has been reported that toxicant exposure induces various cardiovascular abnormalities in embryos and larvae, including haemorrhage, hypertension, oedema, HR alteration, abnormal heart looping and aberrant vascular patterning (Barbara et al, 2009;Sfakianakis et al, 2015). In the current study, vascular system malforma- (Shao et al, 2014), whereas 10-spined sticklebacks appeared to be indifferent to highly toxic solutions of CuSO 4 due to stupefaction (Hartwell et al, 1989). In…”

Section: Toxicity Of Copper Zinc and Mb To Hatching And Survival Of E...supporting

confidence: 46%

“…In this study, the embryos were mostly converted from the normal head‐first emergence to tail‐first emergence, with cumulative probabilities of tail‐first emergence of 34.82%, 14.81% and 49.07% under copper, zinc and MB treatments, respectively. Behavioural response sensitivity can vary between fish and among chemicals (Hartwell et al ., 1989; Hong & Zha, 2019; Makaras & Stankevičiūtė, 2022; Mohamat‐Yusuff et al ., 2018; Shao et al ., 2014), and animals exhibit various stress behaviours to better adapt to adverse environments (Mohamat‐Yusuff et al ., 2018). Copper exposure has been reported to induce Schizothorax o'connori and Schizothorax waltoni to try to avoid toxic water by swimming fast (Shao et al ., 2014), whereas 10‐spined sticklebacks appeared to be indifferent to highly toxic solutions of CuSO 4 due to stupefaction (Hartwell et al ., 1989).…”

Section: Discussionmentioning

confidence: 99%

“…Behavioural response sensitivity can vary between fish and among chemicals (Hartwell et al ., 1989; Hong & Zha, 2019; Makaras & Stankevičiūtė, 2022; Mohamat‐Yusuff et al ., 2018; Shao et al ., 2014), and animals exhibit various stress behaviours to better adapt to adverse environments (Mohamat‐Yusuff et al ., 2018). Copper exposure has been reported to induce Schizothorax o'connori and Schizothorax waltoni to try to avoid toxic water by swimming fast (Shao et al ., 2014), whereas 10‐spined sticklebacks appeared to be indifferent to highly toxic solutions of CuSO 4 due to stupefaction (Hartwell et al ., 1989). In contrast to zebrafish ( Danio rerio ) and Chinese rare minnow ( Gobiocypris rarus ), Japanese medaka ( Oryzias latipes ) showed a different behavioural response sensitivity after exposure to the two chemicals, including hyperactivity responses and a decline in social preference (Hong & Zha, 2019).…”

Section: Discussionmentioning

confidence: 99%

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Toxicity of common biocides used in aquaculture to embryos and larvae of Brachymystax tsinlingensis Li

Guo

Chu

Song

et al. 2023

Journal of Fish Biology

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Brachymystax tsinlingensis Li is a threatened fish species endemic to China. With the problems of environmental factors and seeding breeding diseases, it is important to further improve the efficiency of seeding breeding and the basis of resource protection. This study investigated the acute toxicity of copper, zinc and methylene blue (MB) on hatching, survival, morphology, heart rate (HR) and stress behaviour of B. tsinlingensis. Eggs (diameter: 3.86 ± 0.07 mm, weight: 0.032 ± 0.004 g) of B. tsinlingensis were selected randomly from artificial propagation and developed from eye‐pigmentation‐stage embryos to yolk‐sac stage larvae (length: 12.40 ± 0.02 mm, weight: 0.03 ± 0.001 g) and exposed to different concentrations of Cu, Zn and MB for 144 h in a series of semi‐static toxicity tests. The acute toxicity tests indicated that the 96‐h median lethal concentration (LC50) values of the embryos and larvae were 1.71 and 0.22 mg l−1 for copper and 2.57 and 2.72 mg l−1 for zinc, respectively, whereas the MB LC50 after 144‐h exposure for embryos and larvae were 67.88 and 17.81 mg l−1, respectively. The safe concentrations of copper, zinc and MB were 0.17, 0.77 and 6.79 mg l−1 for embryos and 0.03, 0.03 and 1.78 mg l−1 for larvae, respectively. Copper, zinc and MB treatments with concentrations greater than 1.60, 2.00 and 60.00 mg l−1, respectively, led to a significantly low hatching rate and significantly high embryo mortality (P < 0.05), and copper and MB treatments with concentrations greater than 0.2 and 20 mg l−1 led to significantly high larvae mortality (P < 0.05). Exposure to copper, zinc and MB resulted in developmental defects, including spinal curvature, tail deformity, vascular system anomalies and discolouration. Moreover, copper exposure significantly reduced the HR of larvae (P < 0.05). The embryos exhibited an obvious change in behaviour, converting from the normal behaviour of emerging from the membrane head first to emerging tail first, with probabilities of 34.82%, 14.81% and 49.07% under copper, zinc and MB treatments, respectively. The results demonstrated that the sensitivity of yolk‐sac larvae to copper and MB was significantly higher than that of embryos (P < 0.05) and that B. tsinlingensis embryos or larvae might be more resistant to copper, zinc and MB than other members of the Salmonidae family, which benefits their resource protection and restoration.

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Section: Toxicity Of Copper Zinc and Mb To Hatching And Survival Of E...supporting

confidence: 46%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Toxicity of common biocides used in aquaculture to embryos and larvae of Brachymystax tsinlingensis Li

Guo

Chu

Song

et al. 2023

Journal of Fish Biology

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Population structure and adaptability analysis of Schizothorax o’connori based on whole-genome resequencing

Gao,

He,

Xiong

et al. 2024

BMC Genomics

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Background Schizothorax o’connori is an endemic fish distributed in the upper and lower reaches of the Yarlung Zangbo River in China. It has experienced a fourth round of whole gene replication events and is a good model for exploring the genetic differentiation and environmental adaptability of fish in the Qinghai-Tibet Plateau. The uplift of the Qinghai-Tibet Plateau has led to changes in the river system, thereby affecting gene exchange and population differentiation between fish populations. With the release of fish whole genome data, whole genome resequencing has been widely used in genetic evolutionary analysis and screening of selected genes in fish, which can better elucidate the genetic basis and molecular environmental adaptation mechanisms of fish. Therefore, our purpose of this study was to understand the population structure and adaptive characteristics of S. o’connori using the whole-genome resequencing method. Results The results showed that 23,602,746 SNPs were identified from seven populations, mostly distributed on chromosomes 2 and 23. There was no significant genetic differentiation between the populations, and the genetic diversity was relatively low. However, the Zangga population could be separated from the Bomi, Linzhi, and Milin populations in the cluster analysis. Based on historical dynamics analysis of the population, the size of the ancestral population of S. o’connori was affected by the late accelerated uplift of the Qinghai Tibet Plateau and the Fourth Glacial Age. The selected sites were mostly enriched in pathways related to DNA repair and energy metabolism. Conclusion Overall, the whole-genome resequencing analysis provides valuable insights into the population structure and adaptive characteristics of S. o’connori. There was no obvious genetic differentiation at the genome level between the S. o’connori populations upstream and downstream of the Yarlung Zangbo River. The current distribution pattern and genetic diversity are influenced by the late accelerated uplift of the Qinghai Tibet Plateau and the Fourth Ice Age. The selected sites of S. o’connori are enriched in the energy metabolism and DNA repair pathways to adapt to the low temperature and strong ultraviolet radiation environment at high altitude.

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Assessment of Lead (Pb) Toxicity in Juvenile Nile Tilapia, Oreochromis niloticus—Growth, Behaviour, Erythrocytes Abnormalities, and Histological Alterations in Vital Organs

Mahi

Chowdhury

Baishnab

et al. 2022

Toxics

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Lead (Pb) is one of the toxins responsible for the deterioration of ecological health in aquatic environments. The present study investigated the effects of Pb(NO3)2 toxicity on growth, blood cell morphology, and the histopathology of gills, liver, and intestine of juvenile Nile tilapia, Oreochromis niloticus. A 30-day long aquarium trial was conducted by assigning three treatment groups T1 5.20 mg L−1, T2 10.40 mg L−1, and T3 20.80 mg L−1, and a control 0 mg L−1 following the 96 h LC50 of 51.96 mg L−1 from acute toxicity test. Overall growth performance significantly declined in all the Pb(NO3)2 treated groups and the highest mortality was recorded in T3. Behavioural abnormalities were intense in all the treatment groups compared to the control. Hepatosomatic index (HSI) values were reported as higher in treatment groups. Reduced nucleus diameter and nuclei size in erythrocytes were reported for T2 and T3 groups. Dose-dependent histological alterations were visible in the gills, liver, and intestine of all the Pb(NO3)2 treated groups. The width of the intestinal villi was highly extended in T3 showing signs of severe histological alterations. In conclusion, Pb toxicity causes a negative effect on growth performance, erythrocyte morphology, and affected the vital organs histomorphology of juvenile O. niloticus.

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Copper Acute Toxicity Tests with Schizothorax o’connori Lloyd and Schizothorax waltoni Regan: A Biomonitor of Heavy Metal Pollution in a High Altitude Area?

Cited by 3 publications

References 16 publications

Toxicity of common biocides used in aquaculture to embryos and larvae of Brachymystax tsinlingensis Li

Toxicity of common biocides used in aquaculture to embryos and larvae of Brachymystax tsinlingensis Li

Population structure and adaptability analysis of Schizothorax o’connori based on whole-genome resequencing

Assessment of Lead (Pb) Toxicity in Juvenile Nile Tilapia, Oreochromis niloticus—Growth, Behaviour, Erythrocytes Abnormalities, and Histological Alterations in Vital Organs

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