Effects of the magnetic field on different forms of embryonic locomotor activity of northern pike, Esox lucius L.

Winnicki, Aleksander; Korzelecka-Orkisz, Agata; Sobociński, Andrzej; Tański, Adam; Formicki, Krzysztof

doi:10.3750/aip2004.34.2.07

Cited by 17 publications

(9 citation statements)

References 12 publications

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“…Laboratory experiments with Esox lucius embryos to investigate an effect of 30-min exposure to magnetic fields (constant 4 mT or alternating 15 mT, 7°C) were conducted by Winnicki et al (2004). In blastula (age 3 D°post-fertilisation) and gastrula (1/2 epiboly, 20 D°) an increased angular velocity and amplitude of ectoplasmic waves were observed under both forms of magnetic field.…”

Section: Species Period B Sourcementioning

confidence: 99%

Resource allocation in yolk-feeding fish

Kamler

2007

Rev Fish Biol Fisheries

222

175

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An insight is made into the main processes that occur in fish during endogenous feeding period. The ways in which yolk absorption rate can be measured are evaluated. Essential amino acids and polyunsaturated fatty acids are preferentially retained for incorporation into body tissue. Profound physiological and anatomical changes in yolk and a sequence of slow, fast, and a second period of slow absorption occur during the endogenous feeding period. Attempts to quantify the ontogenetic sequence are reviewed. Various methods of body size assessment are compared, and sources of bias in individual and population growth estimates are discussed. Several calorimetric methods are compared of which direct calorimetry using an oxygen bomb is the reference method. An advanced elemental analysis (CHNS) is a reliable technique that is adequate for early stages. Indices of growth potential are reviewed including a comparison of different measures, models and approaches used to estimate growth. Changes in body hydration, caloric value, content of lipids, protein, free amino acids (FAA) and minerals, and in content of RNA and DNA occur in early ontogeny. Ways to quantify metabolic rate are identified. Mean relative respiration rate of initial egg before activation is very low, about 20 mm 3 g À1 h À1 . Ontogenetic sequence in absolute metabolic rate of fish embryos and yolk-feeding larvae involves an increase through hatching to a peak at the time of first feeding ability, and a decrease under starvation. Models predicting the relationship between oxygen consumption and age in yolk-feeding fish are reviewed. Sequence of metabolic fuels begins with use of small molecules as carbohydrates, soon switched to FAA. Later lipids are progressively used, they provide energy for swimming activity. After yolk depletion body protein-bound amino acids are mobilised. In this review I focused on the major environmental variables as temperature, oxygen, salinity, pH, toxic xenobiotics, light, UV radiation, magnetic field and substrate, along with intrinsic factors as egg or body size, sex and genetic factors. A question was posed on how the extrinsic and intrinsic factors determine yolk absorption, growth and metabolic rates in yolk-feeding fish. Special attention is devoted to fish body size attained exclusively on yolk. A considerable variety of body size responses to temperature was found, for which several explanations are forwarded. Methodological progress made recently is characterised and the most conspicious advances in understanding of fish early life history are highlighted. Information derived from these studies can be used in management of fish populations in the field and to optimise activities in aquaculture.

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Section: Species Period B Sourcementioning

confidence: 99%

Resource allocation in yolk-feeding fish

Kamler

2007

Rev Fish Biol Fisheries

222

175

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“…The static magnetic field of intensity higher than the Earth's natural magnetic field affects an array of processes during early ontogeny as well as the spatial orientation of developing fish embryos, juveniles and adults (Chew and Brown, ; Tesch et al., ; Formicki and Winnicki, ; Formicki et al., ,b; Tański et al., ; Formicki, ). It has an effect on water uptake by fish eggs after fertilisation (Sadowski et al., ), motility of developing embryos (Winnicki et al., ), embryonic respiration (Formicki et al., ), and spatial orientation of embryos and larvae of many fish species (Formicki et al., ).…”

Section: Introductionmentioning

confidence: 99%

The effect of a magnetic field on trout (Salmo trutta Linnaeus, 1758) sperm motility parameters and fertilisation rate

et al. 2015

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Summary The objective of the study was to investigate the effects of a static magnetic field on the trout sperm motility parameters (CASA), DNA integrity (comet assay) and morphology (SEM). The fertilisation rate was also assessed. Exposing the trout spermatozoa to a static magnetic field (1 mT, 5 mT, 10 mT) prolonged the sperm motility to 12 days (288 h), while the control sperm remained motile for only 3 days (72 h). Analysis of fragmentation of genetic material in the spermatozoon head revealed no effects from the studied magnetic fields. After a 30‐min exposure of spermatozoa to the magnetic field, the proportion of fertilised eggs was already 12.7% (1 mT) to 15% (10 mT), higher than that in the control variant. After a 24‐h storage in the magnetic field the difference was even larger – <1% of eggs were fertilised in the control; in the magnetic field the proportion of fertilised eggs increased to 11.4 at 3 mT and 22.1 at 1 mT. The results demonstrate that short‐term storage of sperm in a static magnetic field of low intensity has a positive effect on the sperm motility parameters (not causing DNA fragmentation), which in turn improves the effectiveness of fertilisation and hatching. This suggests that this method, after more comprehensive studies, might be used for short‐term storage of trout sperm.

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“…Probably, direct field more than alternating field exerts a selection effect on weaker genotypes at the embryonic stage, resulting in adults with the mean body mass exceeding that in control groups. The conjecture is supported by the studies on fish eggs in which magnetic field, depending on its characteristics, exerted varied effect on the development of cardiac muscles of the embryos at various stages of embryogenesis; these muscles are responsible for later motive function of the organ (HARARY 1962, SMITH & BERNDT 1964, BLOOM 1970, FORMICKI & WINNICKI 1996, 2001, 2002, 2004b, WINNICKI et al 2004). This study should be regarded as a preliminary attempt at an estimate of the effect of magnetic field on the farming results of H. aspersa, because of the necessity of further modification of the applied fields which should yield more statistically significant data.…”

Section: Discussionmentioning

confidence: 92%

“…Recent studies dealing with the effect of magnetic and electromagnetic fields on various development stages of animals, and conducted in Poland, were concerned mainly with technologies of breeding and farming of numerous fish species of economic importance (FORMICKI & WINNICKI 1996, PERKOWSKI & FORMICKI 1997, FORMICKI & PERKOWSKI 1998, WINNICKI et al 2004, FORMICKI et al 2004a). The terrestrial edible snail Helix aspersa O. F. Müller, 1774 has recently gained importance in Poland, being a farmed species.…”

Section: Introductionmentioning

confidence: 99%

The effect of magnetic field on farmed populations of <i>Helix aspersa</i> O. F. Müller, 1774

Ligaszewski¹,

Łysak²,

Janas³

et al. 2011

Folia Malacologica

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In order to assess the effect of alternating electromagnetic and direct magnetic field on adult Helix aspersa O. F. Müller and their eggs, adults and eggs of H. aspersa maxima Taylor and H. aspersa aspersa O. F. Müller were exposed to such fields with different parameters, and the following life cycle traits were observed: condition of hibernating adults, their survival rate during hibernation and reproduction, egg mass, hatching success, growth rate of hatchlings and body mass of next generation adults. Adults were exposed to sinusoidal, alternating electromagnetic fields of 50 Hz, 100 Hz and 200 µT, and magnetic induction of 50 Hz, as well as a field of 175 µT and 10-1000 Hz (repetition period 80 minutes). Egg batches were exposed to direct magnetic fields of magnetic induction 5 µT and 10 µT and alternating electromagnetic fields of analogous induction and frequency of 50 Hz. The effects varied depending on the parameters of the fields, subspecies and life cycle stage. Adult H. aspersa maxima was more sensitive to the changes in characteristics of electromagnetic field than H. aspersa aspersa, but the two subspecies showed a similar reaction to exposing their eggs to direct or alternating magnetic field. Probably direct field had a greater selection effect compared to alternating field, removing weaker genotypes at embryonic stage; this resulted in a greater mean body mass of the next generation adults. The results are preliminary; further studies, with further modifications of parameters of the fields applied are necessary.

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Effects of the magnetic field on different forms of embryonic locomotor activity of northern pike, Esox lucius L.

Cited by 17 publications

References 12 publications

Resource allocation in yolk-feeding fish

Resource allocation in yolk-feeding fish

The effect of a magnetic field on trout (Salmo trutta Linnaeus, 1758) sperm motility parameters and fertilisation rate

The effect of magnetic field on farmed populations of <i>Helix aspersa</i> O. F. Müller, 1774

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