A comparison between oyster (Crassostrea gigas) and sea urchin (Paracentrotus lividus) larval bioassays for toxicological studies

Citation
E. His et al., A comparison between oyster (Crassostrea gigas) and sea urchin (Paracentrotus lividus) larval bioassays for toxicological studies, WATER RES, 33(7), 1999, pp. 1706-1718
Citations number
53
Categorie Soggetti
Environment/Ecology
Journal title
WATER RESEARCH
ISSN journal
00431354 → ACNP
Volume
33
Issue
7
Year of publication
1999
Pages
1706 - 1718
Database
ISI
SICI code
0043-1354(199905)33:7<1706:ACBO(G>2.0.ZU;2-2
Abstract
respective sensitivity of oyster (Crassostrea gigas) and sea urchin (Palace ntrotus lividus) embryos and larvae to The salinity, and to various micropo llutants (four heavy metals, three pesticides) and to two polluted sediment s were compared with a simplified bioassay method. C. gigas embryos and lar vae were more sensitive to copper; the sensitivity of both species to tribu tyltin (TBT) was practically the same; P. lividus was more sensitive to lea d and mercury. The only pesticide found to be toxic was a herbicide, Dinote rbe, to which oyster larvae were more sensitive than sea urchin plutei. OF the two sediments tested, the first one had effects on P. lividus embryogen esis only; C. gigas embryos and larvae were more affected by the second sed iment which was originated from a harbour and was polluted by heavy-metals. The choice of species for biomonitoring may be based on biological conside rations, such as the availability of mature adults for obtaining gametes, o r on the salinity of the studied area; the oyster bioassay seems to be more suitable for coastal and estuarine brackish waters, because of the broader salinity tolerance of estuarine bivalve larvae as compared to sea urchin l arvae. (C) 1999 Elsevier Science Ltd. Ail rights reserved.