Mercuric ions impair the fertilization potential, the resumption of meiosis, the formation of male pronucleus, and increase polyspermy, in the egg of the ascidianPhallusia mammillata

Franchet, Cécile; Goudeau, Marie; Goudeau, Henri

doi:10.1002/(sici)1097-010x(19970701)278:4<255::aid-jez7>3.0.co;2-o

Cited by 14 publications

(2 citation statements)

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“…2a) are not biologically relevant since they come from a decrease of fertilisation from 100% to 95%. However, Franchet et al (1997) detected a dosedependent effect of Hg 2+ ions on P. mammillata eggs.…”

Section: Discussionmentioning

confidence: 78%

“…Our results are in concordance with those shown by Ringwood (1992) in sea urchin Echinometra mathaei and Nacci et al (1986) in bivalve Isognomon californicum which concluded that spermiotoxicity test is not sufficiently sensible for water quality assays. Franchet et al (1997) verified that Hg 2+ ions did not affect the fertilisation capacity of the sperm of the ascidian Phallusia mammillata. The FR with pre-exposed sperm has been often used as an endpoint in bivalve and sea urchin bioassays, but the sperm sensitivity to toxicants such as trace metals is controversial.…”

Section: Discussionmentioning

confidence: 98%

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Toxicity of Hg, Cu and Zn on early developmental stages of the European clam (Ruditapes decussatus) with potential application in marine water quality assessment

Fathallah

Medhioub

et al. 2010

Environ Monit Assess

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The toxicity of mercury, zinc and copper on sperm viability, fertilisation and embryogenesis of Ruditapes decussatus was examined. Cu did not affect sperm viability at all the concentrations tested. Conversely, the Zn and Hg significantly (P<0.01) reduced sperm viability only at the highest concentration (respectively 512 and 256 μg/l). Cu caused a significant decrease (p<0.05) of less than 6% in the fertilisation rate at 128 μg/l and Zn of up to 13% at 64 μg/l. Hg significantly (p<0.01) inhibited fertilisation at concentrations as low as 32 μg/l. The median effective concentrations (EC50) reducing rates of embryogenesis by 50% were 21.1 μg Hg/l (0.1 μM), 46.3 μg Cu/l (0.72 μM) and 43.4 μg Zn/l. Therefore, Hg is up to seven times more toxic than Cu (on a molar basis). Ecotoxicity of mercury on larvae survival was also assessed in this work. Result showed a significant (p<0.05) reduction of survival after exposure to 4 and 12 μg/l of Hg. The fertilisation rate and embryogenesis were the most sensitive endpoints, although the latter is more advisable for routine assessment of seawater quality because of its greater sensibility.

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Section: Discussionmentioning

confidence: 78%

Section: Discussionmentioning

confidence: 98%

Toxicity of Hg, Cu and Zn on early developmental stages of the European clam (Ruditapes decussatus) with potential application in marine water quality assessment

Fathallah

Medhioub

et al. 2010

Environ Monit Assess

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Reproductive Processes of Marine Animals as Biomarker for Environmental Stress Impact

Gallo

Tosti

2020

Encyclopedia of Marine Biotechnology

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Sublethal Effects of Trace Metals (Cd, Cr, Cu, Hg) on Embryogenesis and Larval Settlement of the Ascidian Ciona intestinalis

Bellas

Beiras

Vázquez

2004

Arch Environ Contam Toxicol

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Toxicity of Cadmium (Cd), Chromium (Cr), Copper (Cu), and Mercury (Hg) on the early developmental stages of Ciona intestinalis was investigated. Developmental defects of larvae after exposure of gametes throughout their development to the larval stage were assessed. Gamete exposure to increasing metal concentrations resulted in a significant decrease of the percentage of normally hatched larvae, showing median effective concentrations (EC50) of 721 microg/L (6.42 microM) for Cd, 12772 microg/L (226 microM) for Cr, 36.6 microg/L (0.576 microM) for Cu, and 44.7 microg/L (0.223 microM) for Hg. Larval attachment was significantly affected when gametes were exposed to the metals throughout development. The EC50 reducing larval attachment by 50% were 752 microg/L (6.7 microM) for Cd, 15026 microg/L (289 microM) for Cr, 67.8 microg/L (1.607 microM) for Cu, and 78.1 microg/L (0.389 microM) for Hg. Therefore, on a molar basis Hg is three times more toxic than Cu, 20-30 times more than Cd, and 700-1000 times more toxic than Cr, for both responses.

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Mercuric ions impair the fertilization potential, the resumption of meiosis, the formation of male pronucleus, and increase polyspermy, in the egg of the ascidianPhallusia mammillata

Cited by 14 publications

References 54 publications

Toxicity of Hg, Cu and Zn on early developmental stages of the European clam (Ruditapes decussatus) with potential application in marine water quality assessment

Toxicity of Hg, Cu and Zn on early developmental stages of the European clam (Ruditapes decussatus) with potential application in marine water quality assessment

Reproductive Processes of Marine Animals as Biomarker for Environmental Stress Impact

Sublethal Effects of Trace Metals (Cd, Cr, Cu, Hg) on Embryogenesis and Larval Settlement of the Ascidian Ciona intestinalis

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