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Articles
Published: 2019-07-15

Caddisflies collected using a Malaise trap at a spring-fed brook of Shimauchi-yusui in the Matsumoto Basin, central Japan: fauna and phenology

3-16-15, Midorigaoka, Ninomiya-machi, Naka-gun, Kanagawa 259-0132, Japan
Hokkaido Aquatic Biology, Hakuyo-cho, 3-3-5, Eniwa, Hokkaido 061-1434, Japan
Department of Biology, Faculty of Science, Shinshu University, Asahi 3-1-1, Matsumoto, Nagano 390-8621, Japan Institute of Mountain Science, Shinshu University, Asahi 3-1-1, Matsumoto, Nagano 390-8621, Japan
Trichoptera

Abstract

Adult caddisflies were collected weekly from a spring-fed brook of Shimauchi-yusui from 11 April 2013 to 5 June 2014. A total of 11867 specimens belonging to 39 species, 18 genera and 14 families were identified. The most abundant species collected in 1 year (the first 52 weeks) were Agapetus sibiricus Martynov 1918 (60%), Apatania aberrans (Martynov 1933) (12%) and Micrasema spinosum Nozaki and Tanida 2007 (5.4%). The Trichoptera fauna mainly reflected the major larval habitats of this brook, but other factors such as water temperature also probably affect species composition. The most common species (wherein more than 50 individuals were collected) had discrete seasonal flight periods.