Velisek J, Stara A, Koutnik D, Zuskova E, Kouba A. 2014. Effect of prometryne on early life stages of marbled crayfish (Procambarus fallax f. virginalis). Neuro Endocrinology Letters 35(Suppl 2): 93-98. http://www.ncbi.nlm.nih.gov/pubmed/25638372, http://europepmc.org/abstract/med/25638372
OBJECTIVES: The aim of this study is to assess the toxicity of prometryne in early life stages of marbled crayfish (Procambarus fallax f. virginalis) on the basis of mortality, early ontogeny, growth rate, and histopathology during and at the end of the test.
DESIGN: The early life stages of marbled crayfish were exposed to prometryne at four concentrations, 0.51, (reported concentration in Czech rivers), 144, 1440, and 4320 µg.l-1 for 53 days and compared to crayfish in a non-treated control group.
RESULTS: Prometryne in concentration 144, 1444 and 4320 µg.l-1 caused decrease of weight and specific growth rates of crayfish. Crayfish exposed the highest concentration 4320 µg.l-1 showed delay in ontogeny development. All crayfish groups exposed to prometryne showed histopathological changes in gill. On the basis of histopathological changes the values of LOEC=0.51 µg.l-1 and NOEC=for 0.10 µg.l-1 of prometryne for marbled crayfish juveniles was estimated.
CONCLUSIONS: Chronic exposure of prometryne on early life stages of crayfish has affected their mortality, growth rate, and histology. Some of the changes were observed only at higher exposures (144, 1444 and 4320 µg.l-1), but histopathological changes in gills were observed also in crayfish exposed to the real environmental concentration in Czech rivers (i.e. 0.51 µg.l-1), which is about 9 times lower than maximal concentration (4.40 µg.l-1) reported in surface waters of Greece. Concentrations of prometryne in World rivers have been reported to generally vary in the range of 0.1-4.40 µg.l-1.
Keywords: None provided.
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Additional, 6 February 2015: The abstract is also listed in Europe PubMed Central.
Additional, 24 February 2015: The PDF of this paper is available on ResearchGate.