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

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

“…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.…”

“…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.…”

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

“…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.…”

“…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.…”

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

“…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.…”

“…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.…”

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

“…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.…”

“…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.…”