The effect of an alternating electromagnetic field upon early development in roach (Rutilus rutilus: Cyprinidae,cypriniformes)

The effect of an alternating electromagnetic field (EMF) upon three stages of roach’s (Rutilus rutilus) early development was studied. The studies covered the periods before gastrulation; from gastrulation until hatching; and from hatching until yolk sac resorption. It has been shown that the EMF effect is as stronger as earlier in the embryogenesis the roach was subjected to an impact. The following responses to EMF were registered: earlier hatching of prelarvae, increase in the morphological diversity of juvenile fish, decrease in body lengths and weights, and changes in the number of vertebrae in yearlings.