Abstract
We deal in this paper with light trapping results of the Heart and Dart (Agrotis exclamationis Linnaeus, 1758 Lepidoptera: Noctuidae), depending on the horizontal component of the geomagnetic field (H-index). We calculated relative catch vales from the hourly collecting individuals of examined species by generation. These hourly relative catch values were classified to the hourly values of H-index. These hourly catch results were correlated to the hourly values of H-index. We calculated correlations to demonstrate the supposed relationship between the two data. Our results suggest that more effective light trap catch belongs to higher H-index values.
Highlights
Introduction and Literature BackgroundIt is well known for a long time that different species of insects are sensitive to geomagnetism and they use it in the spatial orientation.Tshernyshev [1,2] suggest, the caught of some light trapped Coleoptera and Lepidoptera species increase during magnetic field perturbations that of other Lepidoptera and Diptera species to fall off by the phenomenon.Pristavko and Karasov found correlation between the C and ΣK values and the number of collected individuals of the Spotted Ermel (Hyponomeuta rorellus Hbn) [3].In a later paper Pristavko and Karasov suggest that ΣK had a greater impact on the flying activity of the same species at the time of geomagnetic storms [4].Iso-Iivari and Koponen examined the influence of geomagnetism on light trapped insects in the far north of Finland [5]
It is well known for a long time that different species of insects are sensitive to geomagnetism and they use it in the spatial orientation
We examined the connection of hourly light-trap catch of Heart and Dart (Agrotis exclamationis L.), spread in the whole Palearctic region, in nexus with the horizontal component of geomagnetic field (H-index)
Summary
Introduction and Literature BackgroundIt is well known for a long time that different species of insects are sensitive to geomagnetism and they use it in the spatial orientation.Tshernyshev [1,2] suggest, the caught of some light trapped Coleoptera and Lepidoptera species increase during magnetic field perturbations that of other Lepidoptera and Diptera species to fall off by the phenomenon.Pristavko and Karasov found correlation between the C and ΣK values and the number of collected individuals of the Spotted Ermel (Hyponomeuta rorellus Hbn) [3].In a later paper Pristavko and Karasov suggest that ΣK had a greater impact on the flying activity of the same species at the time of geomagnetic storms [4].Iso-Iivari and Koponen examined the influence of geomagnetism on light trapped insects in the far north of Finland [5]. It is well known for a long time that different species of insects are sensitive to geomagnetism and they use it in the spatial orientation. Iso-Iivari and Koponen examined the influence of geomagnetism on light trapped insects in the far north of Finland [5].
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