日本地热带针蟋.pdfVIP

Entomological Science (2016) 19, 416–431 doi: 10.1111/ens.12199 ORIGINAL ARTICLE Ground crickets singing in volcanic warm “islets” in snowy winter: Their seasonal life cycles, photoperiodic responses and origin 1 2,9 2,10 3 Sinzo MASAKI , Masayuki SOMA , Hidenori UBUKATA , Haruo KATAKURA , Rie ICHIHASHI4,11 5 6 7 , Zhuqing HE , Nobuaki ICHIJÔ , Norio KOBAYASHI and Makio TAKEDA8 1 Hirosaki, Aomori, Japan, 2 Department of Science Education, Hokkaido University of Education, Kushiro Campus, Kushiro, Japan, 3 The Hokkaido University Museum, Hokkaido University, Sapporo, Japan, 4 Division of Biology, Department of Biological Sciences, School of Sciences, Hokkaido University, Sapporo, Japan; 5 School of Life Sciences, East China Normal University, Shanghai, China; 6 Hokkaido Kushiro Koryo High School, Kushiro, Japan, 7 Center for University-wide Education, Saitama Prefectural University, Koshigaya, Japan, 8 Graduate School of Agriculture Science, Kobe University, Kobe, Japan, 9 Takadate Elementary School, Hachinohe, Japan, 10 College of Humanities and Sciences, Nihon University, Tokyo, Japan and 11 Ebina, Kanagawa, Japan Abstract The ground cricket Dianemobius nigrofasciatus overwinters as an egg in Japan, being univoltine in Hokkaido and northern Honshu and bivoltine farther south. In Hokkaido, however, this cricket is heard singing in winter in several fumarolic fields covered with moss and grasses locally known as “bokke”. In such warm “islets” the adult density was high in early summer and again in autumn, indicating that the cricket is bivoltine in contrast to the univoltine life