Faculty Profiles - TAKAKURA Koichi

Papers - TAKAKURA Koichi

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New applications of computers in statistical analysis: randomized test and Monte Carlo method

Journal of Urban Living and Health Association 52 ( 4 ) 221 - 228 2008

大阪およびその周辺地域に優占する外来巻貝ハブタエモノアラガイLymnaea columella (Say)とその自家受精による繁殖能力

高倉耕一

大阪市立環境科学研究所報告 70 43 - 51 2008

Cover dependence of predation avoidance alters the effect of habitat fragmentation on two cicadas (Hemiptera : Cicadidae)

K. I. Takakura, K. Yamazaki

ANNALS OF THE ENTOMOLOGICAL SOCIETY OF AMERICA 100 ( 5 ) 729 - 735 2007.9

Language：English Publishing type：Research paper (scientific journal) Publisher：ENTOMOLOGICAL SOC AMER

Habitat fragmentation increases habitat edge, which often enhances predation pressure. This phenomenon, termed the "edge effect," has been documented for many organisms. However, its underlying mechanisms are not sufficiently understood, particularly for insect species. Thus, we aimed to interpret the behavioral mechanism of edge effects in two cicada species: Graptopsaltria nigrofuscata (Motschulsky) and Cryptotympana facialis (Walker) (Hemiptera: Cicadidae). In recent decades, the G. nigrofuscata has been decreasing in urban environments, whereas C. facialis has not. We compared the predation pressure by birds in four urban and three suburban habitats and we observed predation-avoidance behaviors. Results showed that the G. nigrofuscata incurred extremely high predation pressure. However, in C. facialis, predation pressure was constant among habitats. Behavioral observations revealed that predation avoidance of G. nigrofuscata was highly cover dependent, because threatened individuals hid in nearby trees. When tree cover is highly fragmented, the G. nigrofuscata probably has difficulty hiding. However, C. facialis fled cover independently. Front these results, we concluded that the main causes of the decline of G. nigrofuscata in urban habitats were its cover dependence and the increasing discontinuity of tree coverage.

DOI： 10.1603/0013-8746(2007)100[729:CDOPAA]2.0.CO;2

Web of Science

鶴見緑地に建設された田園型ビオトープ―自然体験観察園の水生動物

山崎一夫, 高倉耕一, 大島詔, 中谷憲一

大阪市立環境科学研究所報告 69 37 - 40 2007

Estimation of relative reproductive expenditure in the courtship-role-reversed bean weevil, Bruchidius dorsafis (Fahraeus)

24 ( 1 ) 33 - 36 2006

都市における生物間相互作用の復元

山崎一夫, 高倉耕一, 大島詔

生活衛生 50 ( 5 ) 323 - 332 2006

Variation in egg size within and among generations of the bean weevil, Bruchidius dorsalis (Coleoptera, Bruchidae): Effects of host plant quality and paternal nutritional investment

97 ( 2 ) 346 - 352 2004.3

The nutritional contribution of males affects the feeding behavior and spatial distribution of females in a bruchid beetle, Bruchidius dorsalis

22 ( 1 ) 37 - 42 2004.1

Araecerus tarsalis (Sharp) (Coleoptera, Anthribidae) as a seed predator.

Elytra 32, 138 2004

Pterolophia granulata (Motschulsky) (Coleoptera : Cerambycidae) as a pod borer

57 ( 3 ) 344 - 344 2003.9

大阪市に望ましい水辺環境の構築に関する基礎的研究(第1報) ─今川における生物相および水質調査結果─

新矢将尚, 大島詔, 高倉耕一, 山崎一夫

大阪市立環境科学研究所報告 66 65 - 70 2003

The specialist seed predator Bruchidius dorsalis (Coleoptera : Bruchidae) plays a crucial role in the seed germination of its host plant, Gleditsia japonica (Leguminosae)

16 ( 2 ) 252 - 257 2002.4

Courtship-role-reversal in the bean weevil, Bruchidius dorsalis (Coleoptera : Bruchidae): Interplay between male-male competition and cryptic female choice

36 ( 3 ) 311 - 316 2001.8

食品混入生物検査法カタラーゼテストの妥当性に関する考察

大阪市立環境科学研究所報告調査研究年報第64集, 39-41 2001

Active female courtship behavior and male nutritional contribution to female fecundity in Bruchidius dorsalis (Fahraeus) (Coleoptera : Bruchidae)

41 ( 3 ) 269 - 273 1999.12

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