研究者詳細 - 高倉　耕一

論文 - 高倉　耕一

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Reproductive interference betweenalien species in Veronica 査読

Sachiko Nishida· Naoko Tamakoshi· Ko‑Ichi Takakura· Yuta Watanabe· Masahiro M. Kanaoka

Journal of Plant Research 137 167 - 178 2023年

Reproductive behavior of endangered spined loach Cobitis magnostriata in the field

Kiyohito Morii, Koh-Ichi Takakura

Journal of Ethology 40 ( 2 ) 167 - 174 2022年2月

Reproductive habitat use, body-size structure and spawning season of Cobitis minamorii minamorii in paddy fields and ditches 査読

Morii K., Kitano D., Kanai R., Takakura K.I.

Ichthyological Research 69 ( 1 ) 182 - 188 2022年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Ichthyological Research

We surveyed the reproductive ecology of Cobitis minamorii minamorii in paddy fields and ditches. The spatial distribution of females in the spawning season differed from that in the non-spawning season, even in short ditches. Eggs were collected in both ditches and paddy fields, unlike an earlier study demonstrating that no eggs were collected in ditches. The frequency distributions of standard body lengths of males and females were unimodal and bimodal, respectively. The females with a large standard body length were expected to be gravid with higher probability in May.

DOI： 10.1007/s10228-021-00826-1

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Comparisons among populations and individuals to evaluate pollen–pistil interaction as a mechanism of reproductive interference in Taraxacum 査読

Hashimoto K., Yamamoto A., Kanaoka M.M., Naiki A., Takakura K.I., Nishida S.

Journal of Plant Research 135 ( 1 ) 29 - 40 2022年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Journal of Plant Research

Reproductive interference (RI), an interspecific mating interaction that reduces the fitness of at least one of the species involved, can lead to exclusive distributions in closely related species. A hypothesis previously proposed is that RI in plants may occur by ovule usurpation, in which pistils lack interspecific incompatibility and mistakenly accept heterospecific pollen, thereby losing an opportunity for conspecific pollen fertilization. However, few comparative studies have evaluated the consistency of the inferred mechanism within and among individuals and populations. We conducted hand-pollination experiments in six populations of three native Taraxacum species that suffered from different levels of RI from an alien congener, T. officinale, and compared pollen–pistil interactions among populations. We also investigated the interactions for eight individual T. japonicum plants whose response to heterospecific pollen deposition had been previously measured. Our results revealed that pollen tubes often penetrated native ovaries following heterospecific pollination in populations suffering from strong RI, whereas they seldom did in populations suffering from marginal RI. However, the relative frequency of the pollen tube penetration was not significantly related to the strength of alien RI. Not all pistils on an individual plant showed the same pollen receptivity following heterospecific pollination; rather, some accepted and some refused the pollen tubes. The relationship between pollen tube penetration following heterospecific pollination and the strength of the alien RI was also not significant among individuals. Our present results generally support the ovule usurpation hypothesis, but suggest that other factors, such as competition for pollinator services, variation in the effects of heterospecific pollen donors, and condition of the native inflorescences, might also affect the observed RI strength.

DOI： 10.1007/s10265-021-01352-x

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Comparisons among populations and individuals to evaluate pollen-pistil interaction as a mechanism of reproductive interference in Taraxacum

Hashimoto Keisuke, Yamamoto Akane, Kanaoka, Masahiro M, Naiki Akiyo, Takakura Ko-Ichi, Nishida Sachiko

JOURNAL OF PLANT RESEARCH 135 ( 1 ) 29 - 40 2022年1月

Oviposition preference of solanum fruit fly Bactrocera latifrons (Diptera: Tephritidae) invaded Ryukyu Islands, Southwest Japan 査読

Hisaoka, K., Honma, A, Matsuyama, T., Matsuura, Y., Nishida, T. and Takakura, KI

Japanese Journal of Environmental Entomology and Zoology 34 1 - 8 2022年

Differential performance of contrasting defensive traits of cocoons of two moth species against bird predation 査読

Furukawa M., Nakanishi K., Honma A., Takakura K.I., Matsuyama K., Hidaka N., Sawada H., Nishida T.

Entomological Science 24 ( 3 ) 261 - 269 2021年9月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Entomological Science

Prey defensive traits against predators can be categorized into primary defense (avoiding detection) and secondary defense (avoiding attack after detection). There are trade-offs between these two defensive traits, which consider the cost of defense. To quantify the predation avoidance efficacy of both defensive traits against common predators, we compared bird predation pressures and the corresponding avoidance measures of cocoons of two nettle moth species, which utilize contrasting avoidance strategies: Parasa lepida (investing predominantly in primary defense) and Monema flavescens (investing predominantly in secondary defense). Field censuses revealed that bird predation was the most significant mortality factor for both species. The survival rate of cocoons was significantly higher for M. flavescens than for P. lepida, although M. flavescens were more conspicuous than P. lepida. Measurement of prepupae (cocoon content) mass, and experiments on the feeding preferences of the prepupae of both species using chicks, confirmed a similar quantity and quality of both speciesʼ prepupae as prey items. Our results were explained by the advantage of cocoon hardness outweighing the disadvantage of cocoon conspicuousness. The predation behavior of wild birds suggested that they spent considerably longer handling than searching for cocoons, which accounted for their cocoon preference for P. lepida over M. flavescens in the context of optimal foraging theory. Our results suggested that secondary defense was more effective in reducing bird predation than primary defense in limacodid cocoons.

DOI： 10.1111/ens.12482

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Differential performance of contrasting defensive traits of cocoons of two moth species against bird predation

24 ( 3 ) 261 - 269 2021年9月

Reproductive habitat use, body-size structure and spawning season of Cobitis minamorii minamorii in paddy fields and ditches 査読

2021年6月

he striped fruit fly Zeugodacus scutellatus (Diptera: Tephritidae) uses female flowers of Trichosanthes kirilowii var. japonica as host in Shiga Prefecture, Central Japan 査読

Kitano, D. and K. I. Takakura

Japanese Journal of Environmental Entomology and Zoology 32 111 - 115 2021年

Simple and on-site DNA purification for LAMP reaction applicable to non-adult tephritid fruit fly (Diptera: Tephiritidae) 査読

Kitano D., Takakura K.I.

Journal of Applied Entomology 144 ( 9 ) 824 - 829 2020年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Journal of Applied Entomology

Tephritid fruit flies are important pests of fruits and vegetables worldwide, but few studies have examined their ecology and life history in their native range because non-adult individuals of closely related species are morphologically indistinguishable. To identify non-adult individuals collected from host plants, flies examined in earlier studies were painstakingly reared to adulthood. Using Zeugodacus scutellatus Hendel as a model species, this study established a simple DNA extraction and purification method based on loop-mediated isothermal amplification (LAMP) reaction for on-site molecular identification of non-adult fruit flies. The non-adult individual body fluids were sampled using a sterilized toothpick and then diluted in TE buffer and heated for a short time. Alternatively, eggs were crushed in TE buffer using a sterilized toothpick and then heated. After heated buffer was added to the LAMP reaction mixture as template DNA and the mixture was heated for incubation of polymerase, the LAMP reaction detected the amplified DNA of Z. scutellatus. This purification method, characterized by heating after dilution with TE buffer, is simple and rapid. Our purification method, which obviates large centrifuges, thermal cyclers, and other apparatus, provides lower-cost and better on-site molecular identification of non-adult fruit flies than methods described in earlier reports. The LAMP-based molecular identification technique and our purification method are particularly useful for studying quarantined pest organisms that cannot be removed from their native areas.

DOI： 10.1111/jen.12820

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Simple and on-site DNA purification for LAMP reaction applicable to non-adult tephritid fruit fly (Diptera: Tephiritidae)

Daisuque Kitano, Koh-Ichi Takakura

Journal of Applied Entomology 144 ( 9 ) 824 - 829 2020年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Blackwell Publishing Ltd

DOI： 10.1111/jen.12820

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Habitat partitioning of two closely related pond frogs, Pelophylax nigromaculatus and Pelophylax porosus brevipodus, during their breeding season 査読

Nakanishi K., Honma A., Furukawa M., Takakura K.I., Fujii N., Morii K., Terasawa Y., Nishida T.

Evolutionary Ecology 34 ( 5 ) 855 - 866 2020年10月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Evolutionary Ecology

Parapatric distributions of closely related species are common in many taxonomic groups. However, habitat overlap in sympatric areas within both species’ ranges is complex and driven by the nature of the interactions between species as well as each species’ ecological requirements. We therefore investigated the distribution of breeding habitats for two congeneric frogs, Pelophylax nigromaculatus and Pelophylax porosus brevipodus, in a region of Japan where these species co-occur, based on observation of mating calls as an index of the abundance of males engaging in reproductive activities. Among a total of 381 surveyed sites, P. nigromaculatus and P. porosus brevipodus were found at 171 and 229 sites, respectively. Pelophylax porosus brevipodus was widely distributed throughout the study area and was more abundant than P. nigromaculatus in sympatric sites. Analysis using cumulative link mixed models revealed that the abundance of calling males was negatively affected by the presence of calling males of the other species and by landscape factors. Interspecific differences in this negative effect appear to favor P. porosus brevipodus over P. nigromaculatus in our study area. Due to differences in the primary habitat preferences of the two species during the non-breeding season, habitat partitioning during the breeding season is likely driven by negative interspecific interactions during the reproductive process (i.e., reproductive interference).

DOI： 10.1007/s10682-020-10061-1

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Habitat partitioning of two closely related pond frogs,Pelophylax nigromaculatusandPelophylax porosus brevipodus, during their breeding season

34 ( 5 ) 855 - 866 2020年10月

Quantitative estimation of reproductive interference between two alien pillbugs introduced into Japan. 査読

Koh-Ichi Takakura, Teruya Inoue

Journal of Environmental Entomology and Zoology 31 ( 2 ) 43 - 50 2020年9月

Habitat partitioning in native Geranium species through reproductive interference 査読

Nishida S., Takakura K.I., Naiki A., Nishida T.

Annals of botany 125 ( 4 ) 651 - 661 2020年3月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Annals of botany

© The Author(s) 2020. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com. BACKGROUND AND AIMS: Heterospecific pollen transfer may reduce the fitness of recipient species, a phenomenon known as reproductive interference. A theoretical study has predicted that distributions of species pairs affected by reproductive interference may be syntopic under negligible reproductive interference, sympatric but with partitioning at small spatial scale (i.e. allotopic) under weak interference, or exclusive when reproductive interference is strong. Verifying these predictions is essential for evaluation of the applicability of reproductive interference as a general assembly rule of biological communities. The aim of this study was to test these predictions in two sympatrically distributed wild Geranium species, G. thunbergii and G. wilfordii. METHODS: To measure the effect of reproductive interference, the associations between the relative abundance of the counterpart species and seed set in the focal species, and seed set reduction following mixed pollination, were analysed. The possibility of hybridization with viable offspring was examined by genotyping plants in the field and after mixed pollination. Fertility of putative hybrids was based on their seed set and the proportion of pollen grains with apertural protrusions. A transect study was conducted to examine spatial partitioning, and possible influences of environmental conditions (canopy openness and soil moisture content) on partitioning between the species were analysed. KEY RESULTS: Neither abundance of the counterpart species nor heterospecific pollen deposition significantly affected seed set in the focal species, and hybridization between species was almost symmetrical. Putative hybrids had low fertility. The two species were exclusively distributed at small scale, although environmental conditions were not significantly different between them. CONCLUSIONS: The allotopy of the two species may be maintained by relatively weak reproductive interference through bidirectional hybridization. Re-evaluation of hybridization may allow ongoing or past reproductive interference to be recognized and provide insight into the distributional relationships between the interacting plants.

DOI： 10.1093/aob/mcz210

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Habitat partitioning in native Geranium species through reproductive interference. 査読国際誌

2020年1月

Inhomogeneity of sediment samples in analysis of hexabromocyclododecane 査読

Ichihara M., Yamamoto A., Kakutani N., Takakura K., Sudo M.

Environmental Monitoring and Assessment 191 ( 7 ) 2019年7月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Environmental Monitoring and Assessment

© 2019, Springer Nature Switzerland AG. The repeatability test of the analytical method for hexabromocyclododecane (HBCD) was conducted with sediment sample. The maximum HBCD concentration exceeded the minimum by a factor of 90 even though the identical sediment samples were used. Therefore, we examined which step of the analytical method was the factor causing variability. We examined the blank test, and confirmation test of the extraction and purified procedure. From these results, we confirmed that there was nothing wrong with the accuracy of our analytical method. These results indicate that the variability of HBCD concentration in the repeatability test was attributed not to the analytical method, but to the inhomogeneity of the sediment sample. Aluminum, silicon, and organic carbon in sediments were measured to compare the variability of these concentrations with that of HBCD concentration. These concentrations were similar values within identical samples which showed variability in HBCD concentration. HBCD concentration in several samples did not correlate with organic carbon content. These results suggests that sediment samples were homogeneous by itself, and HBCD was heterogeneously distributed in spite of homogeneity of organic carbon in sediment. The sediment sample with variability in HBCD concentration showed different HBCD diastereomer compositions in identical sediment. It implies that the sample contained HBCD derived from different histories or point sources. Even though we increased sample amounts to analyze the homogeneity of the sample, HBCD concentration varied within identical samples if the sample had a hot spot. Past monitoring data may contain overestimation or underestimation of HBCD concentration in sediment.

DOI： 10.1007/s10661-019-7553-6

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Comparison of mechanisms of reproductive interference in Taraxacum 査読国際誌

Takemori Akane, Naiki Akiyo, Takakura Ko-Ichi, Kanaoka Masahiro M, Nishida Sachiko

ANNALS OF BOTANY 123 ( 6 ) 1017 - 1027 2019年6月

Comparison of mechanisms of reproductive interference in Taraxacum 査読

Takemori A., Naiki A., Takakura K.I., Kanaoka M.M., Nishida S.

Annals of Botany 123 ( 6 ) 1017 - 1027 2019年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Annals of Botany

© The Author(s) 2018. Background and Aims Reproductive interference may reduce fitness of either of the involved species, with potentially important ecological and evolutionary consequences. Except for the effect of shared pollinators on reproductive success, however, mechanisms underlying reproductive interference have been little studied, even though the severity of its impact may depend on the specific mechanism. The aim of this study was therefore to explore the mechanisms of reproductive interference between Taraxacum japonicum (native to Japan) and Taraxacum officinale (alien). • Methods In a field survey, the association between alien species density and seed set in T. japonicum, and whether pollinator behaviour indicated a preference for the alien, were examined. Effects of heterospecific pollen deposition were measured in a series of hand pollination experiments, including mixed pollination experiments in which the order of application of conspecific and heterospecific pollen was varied. Finally, to investigate hybridization frequency, the parentage of seedlings produced following natural, mixed or heterospecific pollination was compared. • Key Results Alien species density did not negatively affect native seed set, nor did pollinators appear to have a preference for alien flowers. The hand pollination experiments showed that heterospecific pollen deposition adversely affected native seed set, especially when alien pollen was applied before conspecific pollen. No viable hybrids were found following natural pollination, which suggests that hybridization might be a rare event. • Conclusion Among the examined mechanisms, heterospecific pollen deposition might have the largest deleterious effect on the native species. This effect is frequency dependent; thus, a positive feedback loop may cause the effect on the population dynamics to increase over time, with the result that the alien might eventually displace the native in a population. Effects of the examined mechanisms on population dynamics should be investigated further to improve understanding of the impact of reproductive interference on the structure of plant communities.

DOI： 10.1093/aob/mcz007

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Reproductive interference between two serious pests, oriental fruit flies Bactrocera carambolae and B. dorsalis (Diptera: Tephritidae), with very wide but partially overlapping host ranges 査読

Kitano D., Fujii N., Sujiono, Yamaue S., Kitamura T., Honma A., Tsukada M., Nishida T., Sawada H., Takakura K.

Applied Entomology and Zoology 53 ( 4 ) 525 - 533 2018年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Applied Entomology and Zoology

© 2018, The Japanese Society of Applied Entomology and Zoology. Bactrocera carambolae and B. dorsalis (Diptera: Tephritidae) are extremely destructive pests of fruits and vegetables in the Asia-Pacific region. Earlier reports have described that B. carambolae and B. dorsalis, respectively, use mainly star fruit and mango, suggesting a certain level of host partitioning which can be ascribed neither to differences in larval food qualities nor host-specific parasitoid mortality. This study specifically examined reproductive interference (antagonistic sexual interaction) between B. carambolae and B. dorsalis as a potential factor strongly affecting their host partitioning. We observed mating behaviors, especially interspecific courtships and mating, by cohabiting the conspecific and heterospecific pairs together. Consequently, we quantified their effects on the reproductive success of females. Males of both species frequently courted their own females, but they also courted females of other species. Courtship refusal by females was not selective in males of either species. This incomplete discrimination of both sexes led to frequent occurrences of interspecific sexual interactions in both species, but only B. carambolae females showed reduced reproductive success. These results suggest that B. dorsalis, superior in reproductive interference, can occupy high-quality mango, whereas B. carambolae, inferior in reproductive interference, must use low-quality star fruit.

DOI： 10.1007/s13355-018-0584-6

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Does simultaneous and sympatric reproduction between two native spined loaches lead to reproductive interference and local extinction? 査読

Morii K., Nakano M., Takakura K.

Environmental Biology of Fishes 101 ( 9 ) 1407 - 1416 2018年9月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Environmental Biology of Fishes

© 2018, Springer Nature B.V. Reproductive interference occurs when fitness of females of one species decreases because of misdirected courtship behaviors by males of another species. Reproductive interference strongly excludes either species in the interaction but it does not persist for long on an evolutionary time scale. Therefore, reproductive interference between a pair of co-evolved native species is difficult to observe because exclusion ends the interaction even if even the potential for reproductive interference still exists. However, anthropogenic environmental changes can bring about secondary contact between two species and trigger reproductive interference, leading to local species extinction. We demonstrated this phenomenon with two native spined loaches: Cobitis magnostriata (Cmag) and C. minamorii oumiensis (Cmio). In 2015 and 2016, we investigated the spatiotemporal dynamics of adults and juveniles of both species to estimate the effects of the relative abundance of adults on reproductive success. Additionally, we surveyed the distribution of juveniles and investigated the proportion of gravid females which failed to reproduce at the end of the spawning season. In 2016, Cmio juveniles were fewer than in 2015, although the abundances of Cmio adults were similarly low in both years and the Cmag adults were more abundant in 2016 than in 2015. The juveniles of the two species exhibited similar spatiotemporal dynamics. At the end of the spawning season, Cmag males were abundant and most Cmio females failed to reproduce. These results suggest that the two species share spawning habitats and seasons and that Cmag males exert reproductive interference on Cmio females. This report is the first of a study suggesting that anthropogenic environmental changes triggered reproductive interference between native species in the field.

DOI： 10.1007/s10641-018-0787-2

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Does simultaneous and sympatric reproduction between two native spined loaches lead to reproductive interference and local extinction? 査読

101 ( 9 ) 1407 - 1416 2018年9月

Skewed male reproductive success and pollen transfer in a small fragmented population of the heterodichogamous tree Machilus thunbergii 査読

Watanabe S., Takakura K., Kaneko Y., Noma N., Nishida T.

Journal of Plant Research 131 ( 4 ) 623 - 631 2018年7月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Journal of Plant Research

© 2018, The Botanical Society of Japan and Springer Japan KK, part of Springer Nature. Heterodichogamy is defined as the presence of two flower morphs that exhibit the male and female functions at different times among individuals within a population. Heterodichogamy is regarded as an adaptation to promote outcrossing through enhanced inter-morph mating, together with a 1:1 morph ratio. However, in highly fragmented populations, the morph ratio may be more likely to be biased by stochastic events. In such a situation, individuals of a minority morph within a population are expected to have higher reproductive success than those of a majority morph, which may suffer from pollen shortages of the minority morph. In this paper, we evaluated mating patterns and male reproductive success in a highly fragmented population of Machilus thunbergii, a putative heterodichogamous evergreen laurel tree. Results of paternity analysis indicated that the selfing rate was not clearly different between the two morphs. In contrast, the proportion of intra-morph mating was higher in the majority-morph (MM) mother trees than in the minority-morph (MF) mother trees. Bayesian estimated male reproductive success indicated that male reproductive success was higher in minority-morph (MF) than in majority-morph (MM) mother trees. These findings indicate that (1) the majority morph mothers, suffering a shortage of the opposite morph pollen, could partly compensate for the reduced reproductive success by intra-morph mating rather than by selfing, and (2) negative-frequency dependent selection may be involved in the maintenance of the two morphs.

DOI： 10.1007/s10265-018-1018-9

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Age class structure of spawning populations of two endangered endemic striated spined loaches in Lake Biwa river system. 査読

Morii K, Takakura KI

Japanese Journal of Environmental Entomology and Zoology 29 ( 4 ) 135 - 141 2018年

Growth patterns of juveniles observed at a shared spawning site in two closely related species of spined loaches endemic to the Lake Biwa riverine system; Cobitis magnostriata and C. minamorii oumiensis 査読

Morii K,Nakano M, Nishida T, Takakura KI

Japanese Journal of Environmental Entomology and Zoology 2018年

Unionid mussel composition and ditch environments in floodplain and alluvial fan geomorphic types: a case study of a Lake Biwa river basin 査読

18 ( 1 ) 41 - 49 2017年1月

A Bayesian approach for estimating hexabromocyclododecane (HBCD) diastereomer compositions in water using data below limit of quantification 査読国際誌

Ichihara M., A. Yamamoto, M. Sudo, K.I. Takakura

Environmental Science and Pollution Research 24 ( 3 ) 2667 - 2674 2017年

琵琶湖につながる小規模水域におけるオオクチバスMicropterus salmoides小型個体の性成熟査読

北野大輔・曽我部共生・佐竹祐亮・高倉耕一

保全生態学研究 22 345 - 349 2017年

滋賀県彦根市の水田地帯に生息するカヤネズミの食性分析－糞DNA分析からの推定査読

畠　佐代子・高倉耕一

環動昆 28 121 - 131 2017年

Variation of clutch size and trophic egg proportion in a ladybird with and without male-killing bacterial infection 査読

30 ( 6 ) 1081 - 1095 2016年12月

Spatial Distribution of Flower Color Induced by Interspecific Sexual Interaction 査読

Takahashi Yuma, Takakura Koh-ichi, Kawata Masakado

PLOS ONE 11 ( 10 ) 2016年10月

絶滅危惧種タチスズシロソウ（Arabidopsis kamchatica ssp. kawasakiana）個体群の個体数推定査読

小杉亜希, 高倉耕一, 野間直彦, 河邊昭, 原田英美子

地域自然史と保全 38 ( 1 ) 51 - 60 2016年6月

検疫害虫ミバエ類の同属近縁種Bactrocera carambolaeとB. papayaeの原産地インドネシア・ジャワ島における寄主利用の比較査読

藤井暢之, Sujiono, 龍洋, 日高直哉, 高倉耕一, 本間淳, 塚田森生, 沢田裕一, 西田隆義

環動昆 26 ( 4 ) 133 - 141 2016年1月

大阪港湾部におけるアカハネオンブバッタの侵入時期について査読

山崎　一夫, 高倉　耕一, 今井　長兵衛

環動昆 27 ( 1 ) 17 - 20 2016年

雑草防除用生物資材としてのオカダンゴムシArmadillidium vulgareの有効性査読

高倉　耕一

環動昆 27 ( 3 ) 81 - 87 2016年

Variation in the strength of reproductive interference from an alien congener to a native species in Taraxacum 査読国際誌

Nishida S, K. Hashimoto, M. Kanaoka, K.-I. Takakura and T. Nishida

Journal of Plant Research 130 125 - 134 2016年

大阪市の犬・猫・ネズミにおけるジフテリア毒素産生性Corynebacterium ulcerans の保有状況と分離株の性状査読

梅田薫, 畠山理沙, 阿部拓人, 高倉耕一, 小宮貴子, 岩城正昭, 山本明彦, 真田秀一

日本獣医師会雑誌 68 ( 12 ) 765 - 769 2015年12月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：Japan Veterinary Medical Association

大阪市動物管理センターに収容された犬，猫及び同市内で捕獲したネズミのジフテリア毒素産生性コリネバクテリウム・ウルセランス（Corynebacterium ulcerans）保有状況を調査した．猫137頭中5頭（3.6％）から本菌が分離されたが，犬125頭，ネズミ29匹からは分離されなかった．これらの保菌猫は，すべて健康状態の悪化した猫であった．猫から分離された5株はすべてジフテリア毒素産生性を有し，生化学性状，薬剤感受性パターン，Pulsed-field gel electrophoresis電気泳動及びRibotypingによる遺伝学的性状は一致していた．これらより，大阪市内の猫には遺伝的に同一あるいは近縁なC. ulceransが分布していることが示された．

DOI： 10.12935/jvma.68.765

CiNii Books

その他リンク： https://jlc.jst.go.jp/DN/JLC/20019687702?from=CiNii

Flower color polymorphism maintained by overdominant selection in Sisyrinchium sp. 査読

128 ( 6 ) 933 - 939 2015年11月

Flower color polymorphism maintained by overdominant selection in Sisyrinchium sp. 査読国際誌

Yuma Takahashi , Koh-ichi Takakura, Masakado Kawata

Journal of Plant Research 128 ( 6 ) 933 - 939 2015年9月

Unionid freshwater mussels in irrigation ditches are affected by physical environmental factors and proximity to paddy fields 査読国際誌

Nakano, M., T. Yamamoto, K.-I. Takakura, M. Urabe

Zoological Science 32 ( 4 ) 378 - 382 2015年8月

Sexual shape dimorphism accelerated by male–male competition, but not prevented by sex-indiscriminate parental care in dung beetles (Scarabaeidae) 査読国際誌

Shigeki Kishi,Koh-Ichi Takakura,Takayoshi Nishida

Ecology and Evolution 5 2754 - 2761 2015年7月

Island biogeography as a test of reproductive interference 査読国際誌

http://link.springer.com/article/10.1007%2Fs10144-015-0489-y

Population Ecology 57 307 - 309 2015年7月

Conflicting intersexual mate choices maintain interspecific sexual interactions 査読国際誌

Koh-Ichi Takakura, Takayoshi Nishida, Keisuke Iwao

Population Ecology 57 ( 2 ) 261 - 271 2015年7月

Host specialization by reproductive interference between closely related herbivorous insects 査読国際誌

Takayoshi Nishida,Kohichi Takakura,Keisuke Iwao

Population Ecology 57 ( 2 ) 273 - 281 2015年7月

湿地の植生復元を目的とした埋土種子の評価：ベイズモデルに基づく実生発生法と直接観察法の統合的評価査読

郭英華,高倉耕一,西川博章,西田隆義,浜端悦治

地域自然史と保全 37 ( 1 ) 47 - 59 2015年6月

伊豆における外来タンポポと在来タンポポ間の繁殖干渉査読

西田佐知子, 高倉耕一, 西田隆義

分類 : 日本植物分類学会誌 15 ( 1 ) 41 - 50 2015年5月

Conflicting intersexual mate choices maintain interspecific sexual interactions 査読

57 ( 2 ) 261 - 271 2015年4月

Host specialization by reproductive interference between closely related herbivorous insects 査読

57 ( 2 ) 273 - 281 2015年4月

Island biogeography as a test of reproductive interference 査読

57 ( 2 ) 307 - 319 2015年4月

Associations between Co-Detected Respiratory Viruses in Children with Acute Respiratory Infections 査読

67 ( 6 ) 469 - 475 2014年11月

Impacts of environmental factors in rice paddy fields on abundance of the mud snail (Cipangopaludina chinensis laeta) 査読

80 460 - 463 2014年11月

Distribution of Capnocytophaga canimorsus in dogs and cats with genetic characterization of isolates 査読

171 ( 1-2 ) 153 - 159 2014年6月

Pollen–pistil interactions in reproductive interference: comparisons of heterospecific pollen tube growth from alien species between two native Taraxacum species 査読

Nishida S, MM Kanaoka, K Hashimoto, KI Takakura, T Nishida

Functional Ecology 28 450 - 457 2014年4月

Pollen–pistil interactions in reproductive interference: comparisons of heterospecific pollen tube growth from alien species between two native Taraxacum species 査読

Sachiko Nishida, Masahiro M. Kanaoka, Keisuke Hashimoto, Koh-Ichi Takakura, Takayoshi Nishida

Functional Ecology 28 ( 2 ) 450 - 457 2014年4月

Impacts of environmental factors in rice paddy fields on abundance of the mud snail (Cipangopaludina chinensis laeta) 査読

Kosuke Nakanishi, Koh-Ichi Takakura, Ryosuke Kanai, Kota Tawa, Daisuke Murakami, Hiroichi Sawada

Journal of Molluscan Studies 80 460 - 463 2014年

Frequent respiratory viral infections in a young child in a 27-month follow-up study 査読

Atsushi Kaida, Hideyuki Kubo, Nobuhiro Iritani, Seiji P. Yamamoto, Atsushi Hase, Koh-Ichi Takakura, Tsutomu Kageyema

JMM Case Reports in press 2014年

標識再捕獲調査とベイズモデルによるナマズSilurus asotus の繁殖集団の動態の推定査読

舟尾俊範, 高倉耕一, 西田隆義, 沢田裕一

魚類学雑誌 61 ( 1 ) 15 - 26 2014年

食品製造施設から分離されたListeria monocytogenesのバイオフィルム形成と塩化ベンザルコニウム耐性査読

中村寛海, 高倉耕一, 曽根良昭, 板野泰之, 西川禎一

Journal of Food Protection 76 ( 7 ) 1179 - 1186 2013年7月

空間的自己相関を考慮した大阪府における3種水鳥の在不在・繁殖の分析と予測査読

高倉耕一, 西尾孝之, 北野雅昭

Ornithological Science 12 ( 1 ) 15 - 26 2013年6月

Occurrence of fluoroquinolones and fluoroquinolone-resistance genes in the aquatic environment 査読

444 508 - 514 2013年2月

イヌノフグリと同属近縁種間における双方向かつ非対称な繁殖干渉査読

高倉耕一

American Journal of Plant Sciences 2013 ( 4 ) 535 - 542 2013年

近縁外来種存在下におけるホトケノザ閉鎖花の優占査読

佐藤康彦, 高倉耕一, 西田佐知子, 西田隆義

ISRN Ecology 2013 Article ID 476862 - 6 2013年

大阪市内における屋外生活ネコ個体群のベイズ推定査読

高倉耕一, 阿部拓人, 土井一秀, 真田秀一, 長谷篤

環動昆 in press ( 4 ) 133 - 141 2013年

ショ糖緩衝液及びガラス繊維フィルタによる植物組織からのより安全なDNA抽出査読

高倉耕一

125 ( 6 ) 805 - 807 2012年11月

殺虫剤・忌避剤効力のベイズ推定法査読

高倉耕一

Journal of Economic Entomology 105 ( 5 ) 1856 - 1862 2012年10月

Increase of GII.2 norovirus infections during the 2009-2010 season in Osaka City, Japan 査読

84 ( 3 ) 517 - 525 2012年3月

在来タンポポ属植物への外来同属種による繁殖干渉の効果における種間差査読

西田佐知子, 高倉耕一, 西田隆義, 松本崇

14 ( 2 ) 439 - 447 2012年2月

インドネシア,ジャワ島において同所的に分布する2種のミバエBactrocera carambolaeおよびBactrocera papayaeの簡易判別法査読

籠洋, 沢田裕一, Susanto Agus

環境動物昆虫学会誌 23 ( 3 ) 143 - 149 2012年

個体ベースモデルを用いた在来－外来タンポポ間繁殖干渉の解析査読

高倉耕一, 松本崇, 西田佐知子, 西田隆義

日本生態学会誌 62 ( 2 ) 255 - 265 2012年

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：日本生態学会暫定事務局

種間に生じる繁殖干渉が生態学的に重要である理由は、この相互作用が種間の排除を最も強力にもたらすためである。一方で、外来生物による在来種の排除には多くの例が知られているにもかかわらず、外来種による繁殖干渉についてはほとんど研究例がなかった。西日本固有種で主に都市部での減少が注目されるカンサイタンポポを材料とした一連の研究により、野外において近縁外来種セイヨウタンポポの比率が高いほど在来種の結実率が低下すること、その直接的な要因が外来種からの種間送粉であること、その範囲が数メートルの規模におよぶこと、などが明らかになってきた。タンポポ類におけるこれらの研究は、繁殖干渉が、外来種が在来生態系に影響を及ぼす際の重要なメカニズムであることを示す一つのケーススタディになりつつある。本研究ではカンサイタンポポ個体群が衰退した要因としての繁殖干渉の重要性を更に検討するため、個体ベースのシミュレーションモデルを構築した。モデルには、既存研究で明らかにされた繁殖干渉に関わるパラメータに加え、野外において死亡率など両種の個体群動態に関わるパラメータを測定して用いた。シミュレーション解析の結果より、野外で観測される繁殖干渉の強度は1世紀程度の時間で在来種を衰退させるのに十分であること、その効果は人為的な撹乱がもたらす死亡率の増加によって増強されることなど、カンサイタンポポについて観測されてきたパターンと整合性が高いことが確かめられた。また、複数の外来種管理プログラムについて在来種個体群存続に及ぼす効果を検証し、より低コストで効果的な在来種保全手法についての提言を行った。これらの成果は、繁殖干渉の研究が在来種の衰退要因を理解する上で重要であるだけでなく、その保全においてもコストパフォーマンスに優れた対策の選択に貢献することを示している。

DOI： 10.18960/seitai.62.2_255

CiNii Books

ミミナグサと同属近縁種間における種子生産段階での繁殖干渉の不在査読

高倉耕一

ISRN Botany 2012 ID 193807 2012年

High Incidence of Human Echovirus Type 3 among Children in Osaka, Japan during the Summer of 2010 査読

64 ( 6 ) 533 - 535 2011年11月

Molecular Epidemiology of Human Rhinovirus C in Patients with Acute Respiratory Tract Infections in Osaka City, Japan 査読

64 ( 6 ) 488 - 492 2011年11月

改良ガラス濾紙法による植物DNAの抽出

高倉耕一

Bunrui 11 ( 2 ) 139 - 149 2011年8月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：日本植物分類学会

分子生物学的な分析手法は,生物学における様々な分野において利用される汎用的な研究手段になっている.このことから,より簡便で安全なDNA抽出・精製手法への需要はますます高まっている.本報告で筆者はガラス濾紙を用いたDNA抽出・精製法の改良を提案した.主な改良点は次の3点である.第1に,植物組織の磨砕液を遠心分離して用いること.第2に,ポリフェノール類の吸着剤であるポリビニルポリピロリドン(PVPP)をDNA抽出液に添加すること.第3に,卓上ミニ遠心機を用いて,濾紙片から効率的にエタノールを取り除き,DNA溶液を回収すること,である.この改良法を用いて,PCRのテンプレートとして利用できる純度のDNA溶液が多様な植物種から得られることを示した.この新しい手法は,低いコスト,高い安全性という点で,多くの従来法よりも優れており,適用範囲の広さという点で,従来のガラス濾紙法よりも優れている.

DOI： 10.18942/bunrui.KJ00007405277

CiNii Books

A tortricid moth of Cydia sp (Lepidoptera: Tortricidae) boring into thorns of Gleditsia japonica Miq. (Fabaceae) in Japan

14 ( 2 ) 179 - 181 2011年6月

A tortricid moth of Cydia sp. (Lepidoptera: Tortricidae) boring into thorns of Gleditsia japonica Miq. (Fabaceae) in Japan 査読

14 ( 2 ) 179 - 181 2011年6月

Effective range of reproductive interference exerted by an alien dandelion, Taraxacum officinale, on a native congener

124 ( 2 ) 269 - 276 2011年3月

Alien Dandelions Displace a Native Related Species Through Interspecific Pollen Transfer 査読

83 - + 2011年

イヌノフグリの“多型”－石垣環境への適応と種子散布者との関係－

高倉耕一, 西田佐知子, 西田隆義

日本生態学会関東地区会会報 59 19 - 25 2011年

大阪市域における特定外来生物の分布:インターネット上の情報活用の可能性と課題

高倉耕一

大阪市立環境科学研究所報告調査研究年報 73 65 - 73 2011年

大阪市万代池公園の動物相

山崎一夫, 高倉耕一

大阪市立環境科学研究所報告調査研究年報 73 75 - 87 2011年

ベイズ統計手法による都市大気オゾンの日内変動と季節変動の分離評価

板野泰之, 高倉耕一

Journal of Japan Society for Atmospheric Environment 46 ( 3 ) 179 - 186 2011年

植物における繁殖干渉とその生態・生物地理に与える影響

高倉耕一, 西田佐知子, 西田隆義

分類 : bunrui : 日本植物分類学会誌 10 ( 2 ) 151 - 162 2010年8月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：日本植物分類学会

Reproductive interference (RI) refers to negative interspecific interactions in which the reproductive activities of one species directly reduce the reproductive success of another species. RI can be observed in various events in plant reproductive processes, such as stigma clogging and pollen allelopathy. The most conspicuous feature of RI is its positive frequency dependence and its self-reinforcing impact via positive feedback: when two species exert RI on one another, the more abundant species exerts a more intense adverse effect on the reproductive success of the other and then becomes...

DOI： 10.18942/bunrui.KJ00006537116

CiNii Books

葉がなければパンを食べる? : オオタバコガ幼虫の奇妙な食性

山崎一夫, 高倉耕一, 今井長兵衛

蝶と蛾 61 ( 2 ) 173 - 175 2010年7月

記述言語：英語出版者・発行元：日本鱗翅学会

オオタバコガの幼虫が大阪市の家屋内でパンを摂食しているところを見出された.この幼虫は偶然に人家,食料品店,あるいはパン製造所のいずれかに侵入し,パンを見つけて摂食にいたったものと考えられる.この幼虫はそのままパンを食餌にして飼育したが,蛹化せずに死亡した.本報告は大蛾類が加工穀物食品を加害した稀な報告例であり,本種のパン食の記録としては2例目である.本種は葉以外に花や果実などを好んで摂食する習性があり,鱗翅目幼虫を捕食することも知られている.本種において稀にパン食が見出されるのは,多食性とタンパク質を多く含む食物を選好する習性が原因なのかもしれない.

DOI： 10.18984/lepid.61.2_173

CiNii Books

Alien pollen grains interfere with the reproductive success of native congener

12 ( 6 ) 1617 - 1626 2010年6月

Detection and quantitative analysis of human bocavirus associated with respiratory tract infection in Osaka City, Japan

54 ( 5 ) 276 - 281 2010年5月

Reproductive interference and salinity tolerance differentiate habitat use between two alien cockleburs: Xanthium occidentale and X. italicum (Compositae)

206 ( 2 ) 309 - 319 2010年2月

If they have no leaves, let them eat bread? - A remarkable food habit in the cotton bollworm Helicoverpa armigera (Hübner) (Lepidoptera, Noctuidae)

Yamazaki, K, Takakura, K.-I, Imai, C

Transactions of the Lepidopterological Society of Japan 61 ( 2 ) 173 - 175 2010年

都市における生物多様性保全の方法とその可能性

高倉耕一

生活衛生 54 ( 2 ) 85 - 92 2010年

大阪府におけるオナモミ類の変遷（その２）

藤井伸二, 高倉耕一

Nature Study 56 ( 11 ) 2 - 5 2010年

大阪府におけるオナモミ類の変遷（その１）

藤井伸二, 高倉耕一

Nature Study 56 ( 10 ) 6 - 8 2010年

大阪市域において2005年から2009年に実施したウエストナイルウイルス保有蚊調査

後藤薫, 改田厚, 山崎一夫, 高倉耕一, 久保英幸, 阿部仁一郎, 入谷展弘, 小笠原準, 北野雅昭, 長谷篤

大阪市立環境科学研究所報告調査研究年報 73 7 - 14 2010年

シックハウス症候群患者宅の室内環境および症状の経時的変化

濱田信夫, 池田浩己, 高倉耕一, 岩前篤, 上原裕之, 永滝陽子, 杉田隆博

生活衛生 54 ( 4 ) 312 - 320 2010年

外来種問題のメカニズムとしての繁殖干渉-タンポポとオナモミの事例

高倉耕一

関西自然保護機構会報 31 ( 2 ) 119 - 135 2009年12月

Reconsiderations on Evaluating Methodology of Repellent Effects: Validation of Indices and Statistical Analyses

102 ( 5 ) 1977 - 1984 2009年10月

Alien dandelion reduces the seed-set of a native congener through frequency-dependent and one-sided effects

11 ( 4 ) 973 - 981 2009年4月

感染症の病毒性に関する進化生態学とその制御

高倉耕一

生活衛生 53 ( 3 ) 145 - 152 2009年

Optimal-Foraging Predator Favors Commensalistic Batesian Mimicry 査読

3 ( 10 ) e3411 2008年10月

ビル屋上におけるカベアナタカラダニの発生消長と食性

高倉耕一, 高津文人

日本応用動物昆虫学会誌 52 ( 2 ) 87 - 93 2008年

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：日本応用動物昆虫学会

カベアナタカラダニの食性を明らかにするため,大阪市内のビル屋上において発生消長と摂食行動の観察を行い,採集したダニ虫体と餌生物の安定同位体分析を行った.摂食行動の直接観察からは,屋上に飛来した小昆虫や落下した葯などに多数の成虫が集まり吸汁しているのが観察された.また,イネ科草本ヒエガエリの花粉を屋上面に添加したところ,添加前と比較して有意に多く摂食行動を示した.ダニ成虫と3種の餌資源(ヒエガエリ葯・キジラミ類成虫・藍藻)について窒素および炭素の安定同位対比を測定し,各餌資源の寄与率を推定したところ,推定方法にかかわらずヒエガエリの寄与率が約50%でもっとも大きかった.以上の結果から,カベアナタカラダニの成虫は雑食性であるものの,植物花粉が最も重要な餌資源であると考えられた.

DOI： 10.1303/jjaez.2008.87

Web of Science

統計解析におけるコンピュータの新しい利用法：確率化テスト、モンテカルロ法

高倉耕一

生活衛生 52 ( 4 ) 221 - 228 2008年

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年

都市の生物相--セミをめぐる研究から

高倉耕一

生活衛生 52 ( 4 ) 239 - 244 2008年

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年9月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：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年

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

24 ( 1 ) 33 - 36 2006年

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年

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年3月

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年1月

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

Elytra 32, 138 2004年

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

57 ( 3 ) 344 - 344 2003年9月

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年

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年4月

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年8月

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年

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

41 ( 3 ) 269 - 273 1999年12月

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