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Observations on Geographic and Temporal Variations in the Ladybeetle Harmonia. I

1969; Japan Academy; Volume: 45; Issue: 4 Linguagem: Inglês

10.2183/pjab1945.45.284

0021-4280

Taku Komai, Masuho Chino,

Animal Behavior and Reproduction

As to the pattern types of the common polymorphic ladybeetle Harmonia axyridis Pallas, there is a distinct geographic gradient (cline) in their relative frequencies at each habitat in Japan, as well as in continental China. A distinct temporal variation (gradient) is found in population samples collected in different years from 1912 through 1965 at Suwa-Tatuno in Nagano Prefecture. These geographic and temporal gradients have probably developed in relation to the local climate, and have their genetic background on the composite and heterotic locus controlling the character.