Transgenerational Effects of Toxicants: An Extension of the Daphnia 21-day Chronic Assay?

• Type: Article in International Scientific Journal
• Date: 2018

Authors

Castro, BB (Author) Other; Freches, AR (Author) Other; Rodrigues, M (Author) Other; Nunes, B (Author) Other; Antunes, SC (Author) FCUP

Journal

Title: Archives of Environmental Contamination and Toxicology

Vol. 74

Pages: 616-626

ISSN: 0090-4341

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 22 Citations

Scopus - 26 Citations

Other information

Authenticus ID: P-00N-HV3

DOI: 10.1007/s00244-018-0507-0

Abstract (EN): The assessment of transgenerational effects should be incorporated in standard chronic toxicity protocols for the sake of a realistic extrapolation of contaminant effects to the population level. We propose a simple add-on to the standard 21-day chronic Daphnia magna assay, allowing the assessment of the reproductive performance of the offspring (F-1 generation) born from the first clutch of the parental (F-0) generation. The extended generational assay was performed simultaneously with the standard reproduction assay. With this design, we evaluated the lethal, reproductive, and transgenerational effects of four widespread and extensively used substances: a biocide/anti-fouling (copper sulphate), an industrial oxidizing agent (potassium dichromate), a pharmaceutical (paracetamol), and a quaternary ammonium compound (benzalkonium chloride). Benzalkonium chloride was the most toxic in terms of lethality, whereas paracetamol, copper sulphate, and potassium dichromate caused deleterious effects in the reproductive performance of exposed D. magna. Adverse effects in the fitness of the daughter (F-1) generation were observed in the case of maternal exposure to paracetamol and copper sulphate, although they were not very pronounced. These findings highlight the usefulness of our approach and reinforce the view-shared by other authors-of the need for a generalised formal assessment of the transgenerational effects of pollutants.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11