ME-2018v9n3 - page 8

Molecular Entomology, 2018, Vol.9, No.3, 29-34
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Specialists found in the field of specialty capture species of the various insect species from the captured material
and this data is registered. For our investigations, all Microlepidoptera spec. indet. data were used from 49 traps of
the nationwide light trap network in 1962, 1963, 1964, 1966, 1967, 1968 and 1969. We did not have data from
1965, so we processed data for seven years. During 1,479 nights 590,139 moths were caught. However, because
more light-trap worked during one night, we could work more than catching nights. Our total catching data
was 21,761.
We have calculated the relative catch values (RC) of the number of caught moths by basic data were the number
of moths caught by one night. In order to compare the differing sampling data, relative catch values were
calculated from the number of moths for each sampling night from spring to autumn until the trap of the year
worked. The relative catch was defined as the quotient of the number of moth specimen caught during a sampling
time unit (1 night) per the average catch (number of moths) within the same catching period to the same time unit.
For example, when the actual catch was equal to the average moth number captured in the same catching period,
the relative catch was 1 (Nowinszky, 2003).
3.2 Methods for calculating of gravitational potentials of the Sun and Moon
The astronomical data were calculated with a program based on the algorithms and routines of the VSOP87D
planetary theory for Solar System ephemeris and written in C by J. Kovacs. The additional formatting of data
tables and some further calculations were carried out using standard Unix and Linux math and text manipulating
commands. For computing the tidal potential generated by the Sun and the Moon we used the expansion of the
gravitational potential in Legendre polynomials and expressed the relevant terms as a function of horizontal
coordinates of the celestial objects.
3.3 Methods for calculating of light-trap catch of Microlepidoptera species in connection with gravitational
potentials of the Sun and Moon
We calculated the change in the gravitational potential of Sun and Moon depending on the height of flying up. We
also calculated the critical elevation depending on the gravitational potential of the celestial bodies.
The gravitational potential values of the Sun and Moon were arranged into groups. The number of groups was
determined according to Sturges’ methods (Odor and Iglói, 1987). The gravitational potential groups and groups
and the corresponding catch data were arranged into groups. We depicted the values of these groups in Figures.
Figures also show the confidence intervals.
Authors’ contributions
LN processed the catching data of moths as a function of the gravitational potential of celestial bodies. MK calculated the negative
and positive gravitational potential values that facilitate or make heavier the fly up of insects. JP participated in the design of the
study, helped in statistical analysis and correction of the manuscript. All authors read and approved the final manuscript.
Acknowledgments
We would like to thank J Kovács (ELTE Astrophysical Observatory, Szombathely) for calculating the Moon and Sun data and
describing the method of investigation.
References
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Dacke M., Nilsson D.E., Scholtz C.H., Byrne M., and Warrant E.J., 2003, Insect orientation to polarized moonlight, Nature, 424, 33
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