Study type: Medical/biological study (experimental study)

Effects of electromagnetic fields on parthenogenic eggs of Daphnia magna Straus. med./bio.

Published in: Ecotoxicol Environ Saf 2010; 73 (1): 62-66

Aim of study (acc. to author)

To study the influence of electromagnetic field exposure on water flea parthenogenetic eggs.

Background/further details

Control and experimental egg samples had strict synchronization and genetic identity.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 45–500 Hz
Exposure duration: up to 43.70 h

Exposure 1

Main characteristics
Frequency 45–500 Hz
Type
Waveform
Exposure duration up to 43.70 h
Exposure setup
Exposure source
Setup pair of horizontal Helmholtz coils with a diameter of 30 cm; dishes with eggs placed in the center of the coils
Parameters
Measurand Value Type Method Mass Remarks
magnetic flux density 75 µT - measured - -

Reference articles

  • Krylov VV (2008): Impact of alternating electromagnetic field of ultralow and low frequencies upon survival, development, and production parameters in daphnia magna straus. (Crustacea, cladocera)

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • during exposure
  • after exposure

Main outcome of study (acc. to author)

Biological effects occured during exposure to electromagnetic fields with 45, 110, 175, 435 and 500 Hz frequencies. Under exposure with these frequencies parthenogenetic eggs of Daphnia magna have shown accelerated rates of embryonic development (accelerated release from the internal egg membrane), except for 500 Hz. Females that developed from exposed eggs have shown deteriorated production characteristics in their first brood (decrease in number of viable offspring, increase of abortive offspring). Size-weight characteristics of females and number of produced offspring in the second brood did not differ from the controls, except for 175 Hz (where it was significantly lower).
The data showed that developing organisms reacted to electromagnetic exposure during embryogenesis by a modification of some processes but returned to normal physiological condition later.

Study character:

Study funded by

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