The effect of static magnetic field on Danube huchen, Hucho hucho (L.) sperm motility parameters

Mazurek

et al. 2017

Ann Agric Environ Med.

Electromagnetic radiation (EMR) emitting from the natural environment, as well as from the use of industrial and everyday appliances, constantly influence the human body. The effect of this type of energy on living tissues may exert various effects on their functioning, although the mechanisms conditioning this phenomenon have not been fully explained. It may be expected that the interactions between electromagnetic radiation and the living organism would depend on the amount and parameters of the transmitted energy and type of tissue exposed. Electromagnetic waves exert an influence on human reproduction by affecting the male and female reproductive systems, the developing embryo, and subsequently, the foetus. Knowledge concerning this problem is still being expanded; however, all the conditionings of human reproduction still remain unknown. The study presents the current state of knowledge concerning the problem, based on the latest scientific reports.

Section: Mechanisms Of the Effect Of Emrmentioning

confidence: 99%

Effect of electromagnetic waves on human reproduction

Mazurek

et al. 2017

Ann Agric Environ Med.

Journal of Fish Biology

“…Furthermore, a static magnetic field has been shown to change the spermatozoa motility parameters such as V CL , V SL and V AP (which translates to fertilisation rate) of the Danube salmon Hucho hucho (L. 1758). V CL of spermatozoa exposed to a magnetic field, following 24 h of exposure, was significantly higher in the magnetic field than in the control (Figure ; Formicki et al, ).…”

Section: Effect Of Magnetic Fields On Gametesmentioning

confidence: 87%

“…After 48 h there were no fertilised eggs in the control while in the variant constantly exposed to a magnetic field the proportion of such eggs increased from 12.7% to 20.6% (Formicki et al, ). Similarly, the percentage of H. hucho eggs fertilised by spermatozoa kept for 24 h in a magnetic field of 1 mT was 71.3%, in a magnetic field of 5 mT, 58.2% and 10 mT, 59.99%, whilst in the control, the fertilisation was 32.6% (Formicki et al, ).…”

Section: Effect Of Magnetic Fields On Gametesmentioning

confidence: 93%

“…Both static and alternating magnetic fields prolong the time of motility and increase the velocity of movement. Short‐term storage of fish semen in a magnetic field also extends the time of motility and maintains their viability at a level close to that at the moment of semen sampling, while in the case of storage outside the generated magnetic field the movement variables and fertilisation rate decrease considerably (Formicki et al, ; Szulc, Tański, Biernaczyk, & Formicki, ).…”

Section: Effect Of Magnetic Fields On Gametesmentioning

confidence: 99%

See 1 more Smart Citation

Magnetoreception in fish

Formicki

Korzelecka-Orkisz

Tański

2019

Magnetoreception is the ability of organisms to perceive magnetic fields in the surrounding environment and changes in its properties such as field direction, intensity and gradient, where the effect on organisms can manifest as an array of reactions. As the magnetic sense is found in many taxa, both evolutionarily young and old, it can be assumed that magnetoreception came into existence as one of the first sensory systems. Many studies on the effect of magnetic fields on fishes have considered both fishes that migrate for long distances and those that are more or less sedentary. Research has focused on tracing the perception of the geomagnetic field by fishes and understanding magnetic fields that are smaller and larger than the ambient Earth's geomagnetic field. The question of the effect of magnetic fields of values higher than the Earth's is gaining importance with the increasing effect of anthropogenic magnetic and electromagnetic fields in aquatic ecosystems. This review draws together the results of studies on the effect and reception of natural and human‐generated magnetic fields on fishes at various stages of ontogeny, chronologically arranged from gametes, through embryonic development, embryonic and larval motor function, directional reactions of embryos and larvae, orientation of fishes, to the mechanisms of magnetic field reception. The present state of knowledge indicates a common nature of effect on various ontogenetic stages of fishes. However, understanding of the mechanisms of magnetic sense in fishes and its relevance for ecological outcomes highlights that further progress requires more detailed research.

“…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.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2016

Summary The aim of study was to investigate the effects of static magnetic fields [1 mT (miliTesla), 5 and 10 mT] on Saprolegnia parasitica growth, development, and cytotoxicity in the infection of trout eggs in hatcheries under laboratory and industrial conditions. The egg envelope (SEM) structures resulting from infection with and development of S. parasitica are also presented. S. parasitica mycelium was cultured on a microbiological medium SDA in Petri dishes (4 ± 0.2°C, 97% humidity) exposed to a magnetic field and in a control, to assess the mycelium growth rate. Effects of the magnetic field on cytotoxicity of S. parasitica after a 21‐day incubation on SDA medium were analyzed using the colorimetric cytotoxicity test MTT. Eggs of brown trout Salmo trutta were infected with S. parasitica by inoculum and incubated in glass vessels (4 ± 0.2°C) in a magnetic field and a control. The degree of mycelium invasion of the egg envelopes and the percentage of egg mortality were recorded daily thoughout the period of embrionic development. The magnetic field effects on brown trout eggs infected by wild strains of fungus‐like organisms (FLO) in the hatchery (4°C ± 0.1) were also investigated. Changes in the structure of brown trout egg envelopes as a result of infection and development of S. parasitica were examined in a FIB/SEM. The effects of magnetic fields of 5 and 10 mT on slowing the growth of mycelium of S. parasitica in vitro were also observed. Determining biochemical properties of S. parasitica also showed the effects of the magnetic field in differentiating the cytotoxicity. All magnetic field values showed a distinct decrease from medium to low values of S. parasitica cytotoxicity; the most effective reduction was observed at 5 mT. Magnetic fields in all tested levels slowed development of the mycelium on the incubated trout eggs, resulting in a decrease in the number of eggs infected by S. parasitica and thus permitting a greater hatching success. Similar effects were observed in other hatching conditions where eggs were also exposed. No negative effects of magnetic field treatment on the condition of the newly‐hatched larvae were observed. The SEM and FIB (Focused Ion Beam) analyses revealed penetration of S. parasitica via radial canals of the envelope. The magnetic field had no effect on the structure of hyphae or sporangia of S. parasitica, but did affect the growth rate of mycelium on the egg surface.