Permalink : http://hdl.handle.net/2115/45195

A faunal survey on drosophilid flies by net sweeping was carried out in Ehime Prefecture, Shikoku, Japan from October 2009 to October 2010. A total of 11,663 individuals of 54 species belonging to 15 genera were collected by the year-round samplings at two localities, Dogo Park and Mt. Miyukiji, and occasional ones at another site in Matsuyama. The most abundant species was Liodrosophila aerea (49%), followed by Drosophila rufa (17%), D. lutescens (9.6%), D. sternopleuralis (4.0%) and D. bizonata (3.8%). The six dominant species showed more or less similar patterns in seasonal population fluctuation, being abundant in spring and/or fall with some variation between the localities. The observed seasonal patterns of drosophilid flies are discussed in relation to the extraordinary hot weather in the summer of 2010.