- 著者
- Kazuya Nagasawa Mizuki Sasaki Hajime Matsubara
- 出版者
- The Japanese Society of Systematic Zoology
- 雑誌
- Species Diversity (ISSN:13421670)
- 巻号頁・発行日
- vol.27, no.2, pp.279-284, 2022-09-22 (Released:2022-09-22)
- 参考文献数
- 44
- 被引用文献数
- 2
Specimens of the coastal marine fish leech Limnotrachelobdella okae (Moore, 1924) were collected from the pelvic fins and lateral body surface of big-scaled redfin, Pseudaspius hakonensis (Günther, 1877), in two brackish water lakes, Lake Tofutsu and Lake Abashiri, on the Sea of Okhotsk coast, Hokkaido, northern Japan. The external morphology of the specimens is briefly described, and the two lakes represent new locality records for the leech. Similarly to coastal marine waters, inshore brackish water lakes are suggested to be a habitat in which L. okae can complete its life cycle. Seasonal occurrence of the species may differ between subarctic Hokkaido and three temperate regions of Japan (Honshu, Shikoku, and Kyushu). The role of big-scaled redfin and its congener, Pacific redfin, Pseudaspius brandtii (Dybowski, 1872), in transporting L. okae alive from the coastal sea to brackish and fresh water bodies is discussed in terms of their diadromous migration ecology.
- 著者
- Tsukasa Waki Mizuki Sasaki Hajime Matsubara Satoshi Shimano
- 出版者
- The Japanese Society of Systematic Zoology
- 雑誌
- Species Diversity (ISSN:13421670)
- 巻号頁・発行日
- vol.26, no.2, pp.273-279, 2021-10-07 (Released:2021-10-07)
- 参考文献数
- 29
- 被引用文献数
- 2
The feather mite Pseudalloptinus milvulinus (Trouessart, 1884) was collected from feathers of the Black Kite Milvus migrans (Boddaert, 1783) in Ishikawa Prefecture, Japan, in 2019. The identification of this mite was based on the form and arrangement of setae on the idiosoma and aggenital region. This study is the first report of this mite species and the genus Pseudalloptinus Dubinin, 1956 in Japan.
- 著者
- Hajime Matsubara
- 出版者
- 日本鳥学会
- 雑誌
- ORNITHOLOGICAL SCIENCE (ISSN:13470558)
- 巻号頁・発行日
- vol.2, no.2, pp.103-111, 2003 (Released:2005-09-09)
- 参考文献数
- 16
- 被引用文献数
- 10 20
Jungle Crows (Corvus macrorhynchos) and Carrion Crows (C. corone) are common species in Japan. They are closely related and considered ecological “generalists”. I carried out a comparative study on territory and habitat use of these crows in an area where they occur syntopically. The two species defended their territories both intra- and interspecifically. The feeding behavior on the ground and the microhabitats in the territories differed between the species. Jungle Crow territories contained more urban areas, and they foraged mainly at garbage stations. In contrast, Carrion Crows mainly foraged in natural or at least un-paved microhabitats and stayed longer on the ground. Differences in microhabitat use and feeding behavior seemed to contribute to ecological separation between the two species of crows.
- 著者
- Hiroyuki Nojima Yasuomi Kiyota Genki Terashi Mayuko Takeda-Shitaka Hajime Matsubara
- 出版者
- The Pharmaceutical Society of Japan
- 雑誌
- Chemical and Pharmaceutical Bulletin (ISSN:00092363)
- 巻号頁・発行日
- vol.67, no.10, pp.1061-1071, 2019-10-01 (Released:2019-10-01)
- 参考文献数
- 41
The activation of epidermal growth factor receptor (EGFR) involves the geometrical conversion of the extracellular domain (ECD) from the tethered to the extended forms with the dynamic rearrangement of the relative positions of four subdomains (SDs); however, this conversion process has not yet been thoroughly understood. We compare the two different forms of the X-ray crystal structures of ECD and simulate the ECD conversion process using adiabatic mapping that combines normal mode analysis of the elastic network model (ENM-NMA) and energy optimization. A comparison of the crystal structures reveals the rigidity of the intradomain geometry of the SD-I and -III backbone regardless of the form. The forward mapping from the tethered to the extended forms retains the intradomain geometry of the SD-I and -III backbone and reveals the trends to rearrange the relative positions of SD-I and -III and to dissociate the C-terminal tail of SD-IV from the hairpin loop in SD-II. The reverse mapping from the extended to the tethered forms complements the promotion of ECD conversion in the presence of epidermal growth factor (EGF).