担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Fly  

Animals adapt to their environments in the course of evolution. One effective approach to elucidate mechanisms of adaptive evolution is to compare closely related species with model organisms in which knowledge of the molecular and physiological bases of various traits has been accumulated. Drosophila elegans and its close relatives, belonging to the same species group as the model organism D. melanogaster, exhibit various unique characteristics such as flower-breeding habit, courtship display, territoriality, sexual dimorphism, and colour polymorphism. Their ease of culturing and availability of genomic information makes them a useful model for understanding mechanisms of adaptive evolution. Here, we review the morphology, distribution, and phylogenetic relationships of D. elegans and related species, as well as their characteristic flower-dependent biology, food habits, and life-history traits. We also describe their unique mating and territorial behaviours and note their distinctive karyotype and the genetic mechanisms of morphological diversity that have recently been revealed.

DOI： 10.1080/19336934.2022.2066953

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CiNii Research

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1002/cne.24877

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PubMed

出版者・発行元：Cold Spring Harbor Laboratory  

<title>Abstract</title>Auditory learning is a prerequisite step for acoustic communication learning, which was previously assumed to be restricted to animals with high levels of cognition, such as humans, cetaceans, and birds. How animals that rely on auditory learning for acoustic communication form sound preferences is not known. Fruit flies are a recently proposed novel animal model for studying experience-dependent auditory perceptual plasticity because of their ability to acquire song preferences via song exposure. Whether fruit flies have innate courtship song preferences, however, is unclear. Here we report that, similar to songbirds, fruit flies exhibit an innate preference for conspecific courtship songs. Maintenance of innate song preference requires song input, reminiscent of the song learning process in songbirds. Our findings also indicate that the response to conspecific and heterospecific songs manifests temporal and experience-dependent differentiation, which may underlie innate song preference and its plasticity. In addition, we find that flies have a robust ability to reacquire song preference during aging. Fruit flies thus offer a novel and simple approach for studying sound preference formation and its underlying mechanisms.

DOI： 10.1101/2020.07.16.205443

記述言語：英語   出版者・発行元：Genes  

Behavior is a readout of neural function. Therefore, any difference in behavior among different species is, in theory, an outcome of interspecies diversification in the structure and/or function of the nervous system. However, the neural diversity underlying the species-specificity in behavioral traits and its genetic basis have been poorly understood. In this article, we discuss potential neural substrates for species differences in the courtship pulse song frequency and mating partner choice in the Drosophila melanogaster subgroup. We also discuss possible neurogenetic mechanisms whereby a novel behavioral repertoire emerges based on the study of nuptial gift transfer, a trait unique to D. subobscura in the genus Drosophila. We found that the conserved central circuit composed primarily of fruitless-expressing neurons (the fru-circuit) serves for the execution of courtship behavior, whereas the sensory pathways impinging onto the fru-circuit or the motor pathways downstream of the fru-circuit are susceptible to changes associated with behavioral species differences.

DOI： 10.3390/genes11020157

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3389/fphys.2019.01552

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PubMed

担当区分：筆頭著者,　責任著者   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 Neurogenetics  

Many animals utilize auditory signals to communicate with conspecific individuals. During courtship, males of the fruit fly Drosophila melanogaster and related species produce a courtship song comprised of sine and pulse songs by vibrating their wings. The pulse song increases female receptivity and male courtship activity, indicating that it functions as a sexual signal. One song parameter, interpulse interval (IPI), varies among closely related species. In D. melanogaster, a song with a conspecific IPI induces a stronger behavioral response than heterospecific songs, indicating the ability of the flies to discriminate conspecific IPI. Traditionally, the fly’s response to the song is measured under grouped conditions, in which the effect of sensory modalities other than audition cannot be excluded. Here, to quantify the individual ability to discriminate a conspecific song, we systematically analyzed the auditory response of single male flies to sound with various parameters. Moreover, we applied this method, termed SMART (Single Male Auditory Response Test), to two sister species for potential application in a comparative approach. By quantifying the locomotor activity of single D. melanogaster males during sound exposure, we detected increased locomotor activity in response to pulse songs, but not to white noise or pure tone. The conspecific song evoked stronger response than the heterospecific songs, and ablation of their antennal receivers severely suppressed the locomotor increase. A pulse song with a small IPI variation evoked a continuous response, while the response to songs with highly variable IPIs tends to be rapidly decayed. This provides the first evidence that fruit flies discriminate IPI variations, which possibly inform the age and social contexts of the singer. Sister species, D. sechellia, exhibited a locomotor response to pulse song, while D. simulans exhibited no behavioral response. This suggests that auditory and other stimuli that elicit this behavioral response are diversified among Drosophila species.

DOI： 10.1080/01677063.2019.1611805

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3389/fnins.2019.00626

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PubMed

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1523/JNEUROSCI.3644-17.2018

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PubMed

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： /10.3389/fncir.2017.00046

PubMed

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ydbio.2016.12.011

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Web of Science

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.heares.2015.10.017

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PubMed

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

In termites, i.e. a major group of eusocial insects, the soldier caste exhibits specific morphological characteristics and extremely high aggression against predators. Although the genomic background is identical to the other non-aggressive castes, they acquire the soldier-specific behavioral character during the course of caste differentiation. The high aggressiveness and defensive behavior is essential for colony survival, but the neurophysiological bases are completely unknown. In the present study, using the damp-wood termite Hodotermopsis sjostedti, we focused on two biogenic amines, octopamine (OA) and tyramine (TA), as candidate neuromodulators for the defensive behavior in soldiers. High-performance liquid chromatographic analysis revealed that TA levels in the brain and suboesophageal ganglion (SOG) and the OA level in brain were increased in soldiers than in pseudergates (worker caste). Immunohistochemical analysis revealed that TA/OA neurons that innervate specific areas, including the mandibular muscles, antennal nerve, central complex, suboesophageal ganglion, and thoracic and/or abdominal ganglia, were enlarged in a soldier-specific manner. Together with the results that pharmacological application of TA promoted the defensive behavior in pseudergates, these findings suggest that the increased TA/OA levels induce the higher aggressiveness and defensive behavior in termite soldiers. The projection targets of these soldier-specific enlarged TA/OA neurons may have important roles in the higher aggressiveness and defensive behavior of the termite soldiers, inducing the neuronal transition that accompanies external morphological changes.

DOI： 10.1371/journal.pone.0154230

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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：日本比較生理生化学会  

<p>シロアリは，高度に発達した社会構造を持つ昆虫である。この社会性は，ほぼ同一のゲノムから生まれた個体が異なるふるまい（＝分業）をおこなうことによって成立している。どのような仕組みで同一ゲノムから生まれた個体が異なる行動や形態を示すようになるのだろうか？また単独性の祖先種から，どのように複雑な社会性が進化したのだろうか？ 本稿ではまず，シロアリの社会性に関して，特に混乱しがちな特殊な用語を含めながら解説する。次に，同一のゲノムから異なる表現型が分化する発生経路やその仕組みに関して紹介する。さらに，それぞれの個体が異なるタスクを分担する神経生理学的基盤に関する最新の研究を紹介する。最後に，シロアリの社会性進化がどのような生理／神経機構の改変に起こってきたのかを考察する。</p>

DOI： 10.3330/hikakuseiriseika.33.191

CiNii Books

CiNii Research

DOI： 10.1007/978-3-319-28890-1_10

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3389/fphys.2014.00179

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：1  

Sexual dimorphisms in trait expression are widespread among animals and are especially pronounced in ornaments and weapons of sexual selection, which can attain exaggerated sizes. Expression of exaggerated traits is usually male-specific and nutrition sensitive. Consequently, the developmental mechanisms generating sexually dimorphic growth and nutrition-dependent phenotypic plasticity are each likely to regulate the expression of extreme structures. Yet we know little about how either of these mechanisms work, much less how they might interact with each other. We investigated the developmental mechanisms of sex-specific mandible growth in the stag beetle Cyclommatus metallifer, focusing on doublesex gene function and its interaction with juvenile hormone (JH) signaling. doublesex genes encode transcription factors that orchestrate male and female specific trait development, and JH acts as a mediator between nutrition and mandible growth. We found that the Cmdsx gene regulates sex differentiation in the stag beetle. Knockdown of Cmdsx by RNA-interference in both males and females produced intersex phenotypes, indicating a role for Cmdsx in sex-specific trait growth. By combining knockdown of Cmdsx with JH treatment, we showed that female-specific splice variants of Cmdsx contribute to the insensitivity of female mandibles to JH: knockdown of Cmdsx reversed this pattern, so that mandibles in knockdown females were stimulated to grow by JH treatment. In contrast, mandibles in knockdown males retained some sensitivity to JH, though mandibles in these individuals did not attain the full sizes of wild type males. We suggest that moderate JH sensitivity of mandibular cells may be the default developmental state for both sexes, with sex-specific Dsx protein decreasing sensitivity in females, and increasing it in males. This study is the first to demonstrate a causal link between the sex determination and JH signaling pathways, which clearly interact to determine the developmental fates and final sizes of nutrition-dependent secondary-sexual characters. © 2014 Gotoh et al.

DOI： 10.1371/journal.pgen.1004098

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記述言語：英語  

DOI： 10.3109/01677063.2013.800060

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1002/jez.b.22501

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1002/jez.1713

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.anbehav.2011.12.022

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1186/1471-2164-11-314

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1186/1471-213X-10-45

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PubMed

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1371/journal.pone.0002617

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.neures.2007.06.532

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総ページ数：217  

ASIN

記述言語：日本語  

J-GLOBAL

記述言語：日本語  

J-GLOBAL

記述言語：英語   掲載種別：研究発表ペーパー・要旨（国際会議）  

記述言語：日本語  

J-GLOBAL

記述言語：日本語   出版者・発行元：日本しろあり対策協会  

CiNii Books

記述言語：日本語   掲載種別：研究発表ペーパー・要旨（全国大会，その他学術会議）  

J-GLOBAL

記述言語：英語   掲載種別：研究発表ペーパー・要旨（国際会議）  

DOI： 10.1016/j.neures.2007.06.532

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記述言語：日本語   掲載種別：研究発表ペーパー・要旨（全国大会，その他学術会議）  

J-GLOBAL

開催年月日： 2021年11月

記述言語：日本語   会議種別：口頭発表（一般）  

開催年月日： 2021年9月

記述言語：英語   会議種別：口頭発表（一般）  

開催年月日： 2021年8月

記述言語：日本語   会議種別：ポスター発表  

開催年月日： 2021年3月

記述言語：日本語   会議種別：シンポジウム・ワークショップ パネル（公募）  

開催年月日： 2020年11月

記述言語：英語  

開催年月日： 2020年11月

記述言語：英語   会議種別：口頭発表（一般）  

開催年月日： 2020年11月

記述言語：英語   会議種別：口頭発表（一般）  

開催年月日： 2020年9月

記述言語：日本語   会議種別：ポスター発表  

記述言語：日本語   会議種別：公開講演，セミナー，チュートリアル，講習，講義等  

記述言語：日本語   会議種別：シンポジウム・ワークショップ パネル（指名）  

記述言語：英語   会議種別：ポスター発表  

記述言語：日本語   会議種別：シンポジウム・ワークショップ パネル（指名）  

記述言語：英語   会議種別：ポスター発表  

記述言語：英語   会議種別：公開講演，セミナー，チュートリアル，講習，講義等  

記述言語：英語   会議種別：シンポジウム・ワークショップ パネル（指名）  

記述言語：日本語   会議種別：公開講演，セミナー，チュートリアル，講習，講義等  

記述言語：英語   会議種別：ポスター発表  

記述言語：日本語   会議種別：シンポジウム・ワークショップ パネル（公募）  

記述言語：日本語   会議種別：シンポジウム・ワークショップ パネル（指名）  

記述言語：日本語   会議種別：公開講演，セミナー，チュートリアル，講習，講義等  

記述言語：日本語   会議種別：口頭発表（一般）  

記述言語：日本語   会議種別：口頭発表（一般）  

記述言語：日本語   会議種別：口頭発表（招待・特別）  

記述言語：英語   会議種別：ポスター発表  

記述言語：日本語   会議種別：口頭発表（一般）  

記述言語：日本語   会議種別：口頭発表（一般）  

記述言語：日本語   会議種別：シンポジウム・ワークショップ パネル（指名）  

記述言語：日本語   会議種別：口頭発表（一般）  

記述言語：日本語   会議種別：シンポジウム・ワークショップ パネル（指名）  

記述言語：日本語   会議種別：口頭発表（招待・特別）  

記述言語：英語   会議種別：口頭発表（一般）  

記述言語：日本語   会議種別：口頭発表（一般）  

記述言語：日本語  

記述言語：英語   会議種別：口頭発表（一般）