The mysid Siriella armata as a model organism in marine ecotoxicology: comparative acute toxicity sensitivity with Daphnia magna

Abstract

Siriella armata (Crustacea, Mysidacea) is a component of the coastal zooplankton that lives in swarms in the shallow waters of the European neritic zone, from the North Sea to the Mediterranean. Juveniles of this species were examined as standard test organisms for use in marine acute toxicity tests. The effects of reference toxicants, three trace metals (Copper, Cadmium and Zinc), and one surfactant, sodium dodecyl sulfate (SDS) were studied on S. armata neonates (\24 h) reared in the laboratory. Acute toxicity tests were carried out with filtered sea water on individual chambers (microplate wells for metals or glass vials for SDS) incubated in an isothermal room at 20 degrees C, with 16 h light: 8 h dark photoperiod for 96 h. Each neonate was fed daily with 10-15 nauplii of Artemia salina. Acute (96 h) LC50 values, in increasing order, were 46.9 lg/L for Cu, 99.3 lg/L for Cd, 466.7 lg/L for Zn and 8.5 mg/L for SDS. The LC(10), NOEC and LOEC values were also calculated. Results were compared with Daphnia magna, a freshwater cladoceran widely used as a standard ecotoxicological test organism. Acute (48 h) LC(50) values were 56.2 lg/L for Cu, 571.5 lg/L for Cd, 1.3 mg/L for Zn and 27.3 mg/L for SDS. For all the reference toxicants studied, the marine mysid Siriella armata showed higher sensitivity than the freshwater model organism Daphnia magna, validating the use of Siriella mysids as model organisms in marine acute toxicity tests.

Arabian killifish (Aphanius dispar) embryos: A model organism for the risk assessment of the Arabian Gulf coastal waters

“…The toxicity of sodium dodecyl sulfate to marine organisms is fairly well documented, and as a result it is used as a reference toxicant in aquatic toxicity tests . Similarly, the effect of Zn on aquatic organisms has been reviewed in the literature , and it is recommended as a positive reference in toxicity tests. Chlorine is used heavily in the Arabian Gulf in industrial cooling systems, and there is a significant interest in assessing its impact on coastal organisms .…”

The Distribution of the MusselMytilusSpecies Along the Norwegian Coast

“…Because these organisms undergo direct development in short time periods, they are suitable for life cycle assessments. Some European mysids such as Neomysis (for brakish waters), Praunus (Garnacho et al, 2000;Mclusky and Hagerman, 1987) and Siriella (Pérez and Beiras, 2010) have been proposed, but sensitivity intercomparisons are lacking. Also, the salinity range of tolerance for each species must be determined before recommendation for routine toxicity testing.…”

Evaluation of marine phytoplankton toxicity by application of marine invertebrate bioassays

“…Following Pérez and Beiras (2010), the NOEC (no effective observed concentration) and LOEC (low effective concentration) values were calculated with the Kruskal-Wallis and the Mann-Whitney U non-parametric test. Differences were considered as significant when p was lower than 0.05.…”