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Influence of different types of lamps on flying insects
Team leader: Zrinka Mesić
Members: Marija Ivković, Ivan Jurić, Nikolina Ričko
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Influence of light on insects• Spectral influence on
insects– they see different then
humans
• It has an influence on their behavior (breading, feeding, there are becoming “easy prey”)
Chart which compares the sight of humans and insects
Insect Human
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Method for catching insects• Catching on different lamps, on sheets • Problems: wind, influence of other lamps,
collecting insects in bottles, moon, predators
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Field work • Working in Višnjan
and Tićan• In Višnjan we only
tried the metods • In Tićan we worked
with three lamps:– Mercury lamp– Sodium high
pressure lamp– Tungsten lamp
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Conservating...
• Small insects were put in alcohol
• Moths were put on special plates
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... And determinatingWe determinated part of mothsc and other orders of insects
Lymantria disparTimandra griseata
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Some more pretty insectsWe also caught...
Culex pipiens
Scopula rubiginata
Emmelia trabealis
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Problems with metods we used
• Predators: bats
• Insects were flying away, we couldn’t collect them all, especially some species
• We need new metods of collecting
• Problems with determination of insects
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Statistical dataNumber of insects 26./27.07.2002.
0100200300400500600700
Na tungsten Hg
nu
mb
er
of
ins
ce
ts
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Pertentages of insects by order caught on tungsten lamp on 27.07.2002
Orthoptera3%
Psocoptera6%
Neuroptera12%
Homoptera3%
Heteroptera6%
Hymenoptera0%
Lepidoptera40%
Mantodea3%
Diptera27%
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Pertentages of insects by order caught on Sodium high pressure lamp on 27.07.2002
Araneae5%
Coleoptera10%
Diptera23%
Heteroptera5%
Homoptera3%
Lepidoptera33%
Mantodea3%
Neuroptera10%
Orthoptera3%
Psocoptera5%
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Pertentages of insects by order caught on mercury lamp on 27.07.2002
Diptera27%
Lepidoptera40%
Homoptera3%
Heteroptera6%
Hymenoptera0%
Neuroptera12%
Orthoptera3%
Psocoptera6%
Mantodea3%
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Conclusion
• Our observation showed that mercury lamp attracts insects the most. Whether tungstan or sodium high pressure lamp attracts them more is not evident. The reason for this is lack of observations partialy caused by strong wind and rain.