- 著者
- SEKIMOTO Shigeyuki Sekimoto Shigeyuki
- 出版者
- Research Faculty of Agriculture, Hokkaido University
- 雑誌
- Insecta matsumurana. New series : journal of the Faculty of Agriculture Hokkaido University, series entomology. (ISSN:00201804)
- 巻号頁・発行日
- vol.70, pp.1-87, 2014-10
Japanese species of the family Myrmeleontidae are revised. The following 17 species are recognized: Myrmeleon formicarius Linnaeus, M. bore (Tjeder), M. solers Walker, M. taiwanensis Miller & Stange (new record from Japan), Baliga micans (McLachlan), Dendroleon pupillaris Gerstaecker), Gatzara jezoensis (Okamoto), Epacanthaclisis moiwana (Okamoto), Distoleon nigricans (Okamoto), Di. contubernalis (McLachlan), Di. bistrigatus (Rambur), Di. boninensis Adams, Neuroleon parvulus (Okamoto) n. comb., Paraglenurus japonicus (McLachlan), Pa. okinawensis (Okamoto), Pseudoformicaleo nubecula (Gerstaecker) and Synclisis japonica (McLachlan). The male of Di. boninensis is recorded for the first time. All Japanese species of Myrmeleontidae are redescribed and illustrated, except for M. taiwanensis for which detailed male and female terminal structures were recently illustrated. A key to the tribes, genera and species of Japanese antlions is provided. In appendix, three new combinations are proposed for three Chinese species, Baliga angustala (Bao et al.), B. coalita (Yang) and B. quangxiensis (Bao et al.): all were formerly assigned to the genus Hagenomyia Banks.
- 著者
- Kondo Keiji
- 出版者
- Research Faculty of Agriculture, Hokkaido University
- 雑誌
- Journal of the Research Faculty of Agriculture, Hokkaido University (ISSN:13456601)
- 巻号頁・発行日
- vol.75, pp.1-9, 2020-03
Pelage insulation depends on the density and length of hair. Hair density is an important factor for determining the quality of fur and to help mammals adapt to their habitat. This study measured hair density and observed the morphology of the medulla in pelage of Japanese mustelids. Hair density was calculated from the number of hairs per hair bundle and the number of hair bundles per cm2. Morphological observations of the medulla were made with a scanning electron microscope(SEM). The hair density was highest in the sea otter(Enhydra lutris),followed by the river otter(Lutra lutra),the mink(Neovison vison),the ermine(Mustela earminea),the sable(Martes zibellina),the Japanese weasel (Mustela itatsi ),and the least weasel(Mustela nivalis ). The morphology of the medulla varied more than expected. This suggests that the medulla morphology could be used to identify a species in mammals. This study suggests the possibility for clarifying whether hair density and the morphology of the medulla depend upon taxonomy or habitat,by examining the pelage of species inhabiting different environments.
2 0 0 0 OA Assessing the Economic Impact of Climate Change on Japanese Agriculture : A Ricardian Analysis
- 著者
- Nitta Atomu Sawauchi Daisuke Chen Yongfu Akahori Hirokazu Yamamoto Yasutaka
- 出版者
- Research Faculty of Agriculture, Hokkaido University
- 雑誌
- Journal of the Research Faculty of Agriculture, Hokkaido University (ISSN:13456601)
- 巻号頁・発行日
- pp.7-20, 2019-03
The purpose of this study is to determine whether climate change will increase or decrease agricultural net revenue in Japan as a whole. This study conducts the first Ricardian model analysis of this issue and finds that agricultural net revenue will decrease across Japan by the end of the twenty-first century. The impacts of climate change are quite different in different regions of the country;an increase in agricultural net revenue is predicted in the northern municipalities, whereas agricultural net revenue is predicted to decline in many other municipalities.
- 著者
- Williams Paul H. Ito Masao Matsumura Takeshi Kudo Iwao Williams Paul H. Ito Masao Matsumura Takeshi Kudo Iwao
- 出版者
- Research Faculty of Agriculture, Hokkaido University
- 雑誌
- Insecta matsumurana. New series : journal of the Faculty of Agriculture Hokkaido University, series entomology. (ISSN:00201804)
- 巻号頁・発行日
- vol.66, pp.115-151, 2010-10
W ILLIAMS, P. H. , h o, M., M ATSUMURA, T. and K UDO, T., 20 10. The bumblebees of the Nepal Himalaya (Hymenoptera: Apidae). I ns. fIlatsum. n. s. 66: 1 [j- 151 , 36 figs, 3 tabs. Among 2,762 spec imens of bumblebees (genus Bombus) from Nepal, a total of 34 species is recorded. Bombus abnormis, B. branickii, B. grahami, B. personaflls, and B. presslis are recorded from Nepal for the first time. None of the species is endemic. A key to females, colour-pattern diagrams for females, and distribution maps are provided. Bumblebees in Nepal tend to have colour patterns of the thoracic dorsum that are black at low e levations, unbanded pale at mid elevations, and banded at high e levations, with the pale pal1s tending to become lighter at higher elevations. A western, an eastern, and a larger widespread fauna are described. Key words. Bumblebee, Bombus, taxonomy, di stribution, e levati on, a lti tude, pollinators. Nepal.