Toxicity of cadmium to free-living marine and brackish water nematodes (Monhystera microphthalma, Monhystera disjuncta, Pellioditis marina)
Vranken, G.; Vanderhaeghen, R.; Heip, C.H.R. (1985). Toxicity of cadmium to free-living marine and brackish water nematodes (Monhystera microphthalma, Monhystera disjuncta, Pellioditis marina). Dis. Aquat. Org. 1: 49-58. http://dx.doi.org/10.3354/dao001049 In: Diseases of Aquatic Organisms. Inter Research: Oldendorf/Luhe. ISSN 0177-5103; e-ISSN 1616-1580, more |   |
| Keywords | Aquatic organisms > Estuarine organisms
Aquatic organisms > Marine organisms
Chemical elements > Metals > Heavy metals
Chemical elements > Metals > Heavy metals > Cadmium
Lethal effects
Population functions > Mortality
Properties > Biological properties > Toxicity
Tests > Toxicity tests
Monhystera disjuncta Bastian, 1865 [WoRMS]; Monhystera microphthalma de Man, 1880 [WoRMS]
Marine/Coastal; Brackish water |
| Authors | | Top | - Vranken, G.
- Vanderhaeghen, R.
- Heip, C.H.R., more
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| Abstract | Cadmium toxicity to 3 marine and brackish-water nematodes (Monhystera microphthalma, M. disjuncta, Pellioditis marina) was estimated under static tests. These nematodes are very resistant to cadmium poisoning. LC 50 values are extremely time-dependent; an exposure time of 96 h underestimates the degree of toxicity. For M. disjuncta LC 50 values were 21.1 and 18.4 ppm after 192 and 264 h respectively. P. marina was much more tolerant to cadmium in comparison with the monhysterids and had LC 50 values of 90.5 ppm at 120, and of 77.0 ppm at 192 h. It is argued that MEC values based on mortality and on a developmental assay in which success in attaining the adult stage was studied, turned out to be very similar. The developmental assay takes less time than the survival assays and the slope of the response curve can be used as a parameter for describing species sensitivity. |
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