Effects of fertilizing sea trout (Salmo trutta L.) eggs with spermatozoa exposed to a magnetic field

Abstract

Sea trout (Salmo trutta L.) eggs were fertilizEld with spermato zoa which . had been exposed for 4 hours to the effect of a steady magnetic field of 200 mT and 250 mT and for 5 hours to 200 mT. Percentage of fertilized eggs was calculated, and observations were made on the course of egg incubation.The experiments confirmed the suggestions on beneficial effect of magnetic field upon the success of egg fertilization. Samples of eggs fertilization with spermatozoa which had been previously exposed to a magnetic field were characterized by significantly higher percentage of fertilized eggs compared to the control.

Is Sperm Motility Maturation Affected by Static Magnetic Fields?

“…On the contrary, an increase in the percentage of activated ejaculated sperm and a prolongation of their viability were shown in fish after in vitro sperm exposure to magnetic fields of up to 100 mT (19). An increase in the percentage of successfilly fertilized eggs was also demonstrated in a companion paper (20). Nevertheless, substantiation of the current findings for epididymal sperm is not possible because no comparable studies exist; the potential for comparison with the above mentioned reports is, moreover, severely compromised by the use of an alternative methodological approach, induding the source of sperm and the greater reliability of our study due to the objectivity conferred by the SCA system.…”

“…Members of the general public may also be exposed to static or time-varying magnetic fields: 1) the application of magnetic field devices is widely used in medicine for various therapeutic applications (14) and for medical diagnosis (15,16) in which stationary magnetic fields with intensities of up to 2 T may be used in the course of an examination (13); 2) magnetically levitated trains can produce magnetic flux at floor level of the passenger compartment of 50-100 mT (13); and 3) very small permanent magnets are encountered even in domestic situations (their influence on human health, if any, has not been studied). Notwithstanding this, the number of studies on the possible relationship between male fertility and magnetic field exposure is very low and experimental outcomes are very different: reversible changes in spermatogenic epithelium (11), aberrations in rat spermatozoa (17,18) beneficial effects on salmon sperm motility (19,20), or no effects on human fertility (21).…”

Modulating effect of a magnetic field on Saprolegnia parasitica, Coker, 1923 infecting trout (Salmo trutta, L.) eggs

“…Earlier studies on the effects of magnetic fields on fishes focused on gametes, embryos, larvae and adults (Formicki et al, 1998(Formicki et al, , 2004aFormicki, 2008). The exposure of the huchen and trout spermatozoa to a static magnetic field resulted an increase in the percentage of gametes activated in the water, a significant increase in their motility time and in an increased proportion of activated eggs (Formicki et al, 1991(Formicki et al, , 2013(Formicki et al, , 2014. Eggs subjected to static magnetic fields prior to fertilisation retained their fertilisation capacity for a longer period of time and absorbed water more slowly in the process of activation.…”

A device for transporting fish gametes and fertilised eggs in a magnetic field

“…The proportion of activated spermatozoa increases and duration of their motility becomes significantly extended after contact with water. As a result, ef fects of fertilisation (the eggs are longer prone to become fertilised) are significantly better Krzysztof F ornricki, Aleksander Winnicki on exposure to magnetic field than witho1,1t it (Formicki et al 1990(Formicki et al , 1991Fonnicki and Winnicki 1993).…”