Circadian locomotor activity ofMusca flies: Recording method and effects of 10 Hz square-wave electric fields

Engelmann, Wolfgang; Hellrung, Winfried; Johnsson, Anders

doi:10.1002/(sici)1521-186x(1996)17:2<100::aid-bem4>3.0.co;2-7

Cited by 16 publications

(4 citation statements)

References 25 publications

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“…Many studies have examined ULF radiation prior to earthquakes [7,8,47], and some studies reported the leading times were between a few weeks and a month [4,48]. Some reports suggest that the ULF magnetic field affects behavior and hormones [49,50,51,52,53]. The electromagnetic field with a frequency of 10 Hz is known to affect circadian activity rhythms [52,53].…”

Section: Discussionmentioning

confidence: 99%

“…Some reports suggest that the ULF magnetic field affects behavior and hormones [49,50,51,52,53]. The electromagnetic field with a frequency of 10 Hz is known to affect circadian activity rhythms [52,53]. Mahdavi et al [49,51] have reported that exposures to electromagnetic fields with 5 Hz or 12 Hz elevated activity levels and adrenocorticotropic hormone concentrations in rats.…”

Section: Discussionmentioning

confidence: 99%

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Statistical Evaluations of Variations in Dairy Cows’ Milk Yields as a Precursor of Earthquakes

Yamauchi

Hayakawa

Asano

et al. 2017

Animals

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Simple SummaryThere are many reports of abnormal changes occurring in various natural systems prior to earthquakes. Unusual animal behavior is one of these abnormalities; however, there are few objective indicators and to date, reliability has remained uncertain. We found that milk yields of dairy cows decreased prior to an earthquake in our previous case study. In this study, we examined the reliability of decreases in milk yields as a precursor for earthquakes using long-term observation data. In the results, milk yields decreased approximately three weeks before earthquakes. We have come to the conclusion that dairy cow milk yields have applicability as an objectively observable unusual animal behavior prior to earthquakes, and dairy cows respond to some physical or chemical precursors of earthquakes.AbstractPrevious studies have provided quantitative data regarding unusual animal behavior prior to earthquakes; however, few studies include long-term, observational data. Our previous study revealed that the milk yields of dairy cows decreased prior to an extremely large earthquake. To clarify whether the milk yields decrease prior to earthquakes, we examined the relationship between earthquakes of various magnitudes and daily milk yields. The observation period was one year. In the results, cross-correlation analyses revealed a significant negative correlation between earthquake occurrence and milk yields approximately three weeks beforehand. Approximately a week and a half beforehand, a positive correlation was revealed, and the correlation gradually receded to zero as the day of the earthquake approached. Future studies that use data from a longer observation period are needed because this study only considered ten earthquakes and therefore does not have strong statistical power. Additionally, we compared the milk yields with the subionospheric very low frequency/low frequency (VLF/LF) propagation data indicating ionospheric perturbations. The results showed that anomalies of VLF/LF propagation data emerged prior to all of the earthquakes following decreases in milk yields; the milk yields decreased earlier than propagation anomalies. We mention how ultralow frequency magnetic fields are a stimulus that could reduce milk yields. This study suggests that dairy cow milk yields decrease prior to earthquakes, and that they might respond to stimuli emerging earlier than ionospheric perturbations.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Statistical Evaluations of Variations in Dairy Cows’ Milk Yields as a Precursor of Earthquakes

Yamauchi

Hayakawa

Asano

et al. 2017

Animals

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“…Flight activity of houseflies has been seen to increase instantaneously when a storm approaches and there is a rapid fall in atmospheric pressure (West 1951). Electric fields also affect the behaviour of insects and have been shown to deter houseflies and change their circadian rhythm of locomotion (Perumpral et al 1978, Engelmann et al 1996, McGonigle and Jackson 2002.…”

Section: Biologymentioning

confidence: 99%

Houseflies, annoying and dangerous

Smallegange,

den Otter

2007

Emerging Pests and Vector-Borne Diseases in Europe

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Musca domestica (Diptera: Muscidae), the common housefly, is found in close conjunction with humans and their livestock around the world. The flies cause annoyance to people and are vectors of several diseases. Commonly-used control methods (cultural, chemical, biological, traps and baits) do not result in reducing fly populations to acceptable levels. Research on integrated control approaches is required. Models based on expected climate changes predict a substantial increase in fly populations over the next decades, which may result in a considerable expansion in the incidence of fly-borne diseases, thereby endangering health and well-being of people globally. This strengthens the need for intensive studies on the behaviour, ecology, and vectorial capacity of houseflies.

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“…Another of Wolfgang’s interests was to unravel the formal properties of circadian clocks, by investigating the effects of light (Engelmann et al, 1973; Johnsson et al, 2006), electromagnetic fields (Engelmann et al, 1996; Sharma et al, 2014), and heavy water (Brenner and Engelmann, 1973; Maurer and Engelmann, 1974) on rhythms of plants and animals. In the case of light, he was able to stop the eclosion rhythm of D. pseudoobscura (Chandrashekaran and Engelmann, 1976) and the petal movement rhythm in K. blossfeldiana (Engelmann et al, 1978) with a light pulse of defined timing and strength—in other words, he reached the point of singularity that was predicted by Arthur Winfree (Engelmann and Witte, 2016).…”

mentioning

confidence: 99%

Wolfgang Engelmann: Passionate Researcher, Teacher, and Artist (26 February 1934 to 1 July 2023)

Helfrich-Förster

2023

J Biol Rhythms

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Circadian locomotor activity ofMusca flies: Recording method and effects of 10 Hz square-wave electric fields

Cited by 16 publications

References 25 publications

Statistical Evaluations of Variations in Dairy Cows’ Milk Yields as a Precursor of Earthquakes

Statistical Evaluations of Variations in Dairy Cows’ Milk Yields as a Precursor of Earthquakes

Houseflies, annoying and dangerous

Wolfgang Engelmann: Passionate Researcher, Teacher, and Artist (26 February 1934 to 1 July 2023)

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