Search Results 41-60 of 387

  • Cytogenetical analysis of Nepogomphus modestus from Palampur area of Himachal Pradesh, India (Gomphidae : Anisoptera)

    WALIA Gurinder Kaur , SANDHU Ravinder , GOYAL Sonika

    Primary spermatocyte chromosomes of Nepogomphus modestus collected from Palampur area of Himachal Pradesh, India has been investigated. The chromosome analysis showed haploid number n(♂)=12 consisting of 11 bivalents and a univalent. In the complement, m chromosomes were lacking. The univalent, the largest element in the complement, is X chromosome. The result indicates that diploid chromosome number of Nepogomphus modestus is 2n(♂)=23=22A+X. N. modestus is the first species described cytologically among three species known to genus Nepogomphus.

    Chromosome science 9(3), 99-100, 2006-07-01

    NDL Digital Collections  References (15)

  • Monitoring Survey (2001-2005) of Dragonflies (Odonata) of the Imperial Palace, Tokyo, Central Japan  [in Japanese]

    Saito Yoichi , Owada Mamoru , Kato Shun-ichi , Inoue Shigekazu

    Monitoring investigations on the fauna of Odonata were made at the gardens of the Imperial Palace, Tokyo, ca. 115 ha, central Tokyo, from 2001 to 2005. A total of 33 species belonging to 8 families were recorded. Similar research were carried out at the same place from 1996 to 2000, and 27 species in 8 families were recorded (Tomokuni & Saito, 2000). The following six species are recorded from the Imperial Place for the first time. Aeschnidae: Aeschnophlebia anisoptera Selys, Polycanthagyna melanictera (Selys), Anaciaeschna martini (Selys) (Fig. 30) and Anax nigrofasdatus nigrofasciatus Oguma (Fig. 31). Libellulidae: Libellula quadrimaculata asahinai Schmidt (Fig. 35) and Sympetrum kunckeli (Selys). Three endangered species in Tokyo urban areas, Ceriagrion nipponicum Asahina (Figs. 9-10), Trigomphus melampus (Selys) (Figs. 19-21) and Aeschnophlebia longistigma Selys (Figs. 27-29) were discovered by the former study (Tomokuni & Saito, 2000), and they are still abundant in the Palace. Rhyothemis fuliginosa Selys (Fig. 41), which had also been very scarce in the urban Tokyo, was gradually increase its number from 2002-2004, and we were able to observe its outbreak in the summer of 2005.

    Memoirs of the National Science Museum (43), 383-406, 2006-03

  • Importance of Streamside Structures for Emergence in Aquatic Insects : Especially in Plecoptera  [in Japanese]

    磯辺 ゆう , Yu Isobe , 奈良文化女子短期大学 環境教養学科

    水生昆虫の生活場所として、従来、河原が大きく着目されることは少なかった。しかし、水生昆虫は主に羽化を境に水中から陸上に生活場所を変えるため、河原は羽化場所として大きな意義を持つはずである。主にカワゲラ目の羽化の問題から、河原の構造のもつ意味を考察した。羽化の状況は、分類群によって異なっている。不完全変態性の水生昆虫の中でもトンボ目とカワゲラ目は全ての種が陸上にあがってから羽化を行うために、羽化時の河原の役割が大きい。同時に羽化殻を陸上に残すので、羽化殻による調査が可能である。特にカワゲラ目幼虫は、流水の中で様々な環境条件に生息するために、河原との関係が複雑である。河原を構成する要素(河原要素)は、大きな岩、砂礫堆、草原、人工構築物などであるが、カワゲラ目はいずれの場所でも羽化できる。その場所利用の仕方は、流れの方向、河原要素の大きさや配置とその性質の他に、幼虫各種の生息場所、羽化前の移動、上陸してからの行動、羽化の季節と時刻などの相違に関係してくると予測される。

    Study reports of Narabunka Women's Junior College (36), 15-24, 2005

    IR 

  • An inhabitants guide in Nara University of Education: producing a digital pictorial book of organisms on Web for kids  [in Japanese]

    TAKAMI Mai , SAITOH Hisashi , ARAI Ippei , ISHIDA Masaki

    The objective of the current study is to build up the digital guide of the inhabitants in Nara University of Education on Web, as an teaching material especially for elementary school student. Databases of the organisms live in our Campus, such as, insects, soil organisms, fresh water planktons, were created individually based on the investigations curried out from April, 2004 through January, 2005. In order to demonstrate the real color of the organisms, only the live images were chosen for publication. As a result, over 100 species of each insects, soil organisms, and planktons were collected as digital images, and classified as 95 species for insects, 80 species for soil organisms, 91 species for planktons (50 zooplanktons, 41 phytoplanktons), respectively. These organisms are recorded and filed with short information, such as, their morphological and ecological features, habitat in each databases by using software File Maker Pro 4.1. Our final goal is to publish these databases on the Web, which will appear on our University's HP (URL: http://www.nara-edu.ac.jp/) in near future.

    Bulletin of Center for Natural Environmental Education, Nara University of Education (7), 57-68, 2005-11

    IR 

  • Disturbed Population Genetics: Suspected Introgressive Hybridization between Two Mnais Damselfly Species (Odonata)

    Hayashi Fumio , Dobata Shigeto , Futahashi Ryo

    Mnais costalis and M. pruinosa are damselflies (Odonata: Calopterygidae) with low dispersal abilities, both during their aquatic stream-living immature stage and their flying adult stage. A previous nuclear DNA (nDNA) sequencing and morphology study showed that these two species are very closely related, and cohabit widely in western Japan. The two species, however, segregate microhabitats along a stream: M. costalis lives in the lower reaches, and M. pruinosa in the upper reaches. In this study, our analyses were based on mitochondrial DNA (mtDNA), which usually mutates faster and is more variable among individuals than nDNA, and which is inherited maternally. We found that most COI haplotypes were shared between the two species, and that for most study sites interspecific riverine genetic structures were not clarified by mtDNA analysis. Incongruent population genetic structures based on nDNA and mtDNA suggested hybridization and introgression of mtDNA between the two species.

    ZOOLOGICAL SCIENCE 22(8), 869-881, 2005

    J-STAGE  NDL Digital Collections  Cited by (2)

  • The Review of the Idiomatic Expression if it were not for : Using the Shogakkan BNC Online  [in Japanese]

    神谷 昌明 , 佐藤 利哉 , 神田 和幸 , Masaaki Kamiya , Toshiya Sato , Kazuyuki Kanda

    Chukyo University bulletin of the Faculty of Liberal Arts 46(1), 1-29, 2005

    IR 

  • Age-Related Changes in Flight Muscle Mass, Lipid Reserves and Flight Capacity during Adult Maturation in Males of the Territorial Damselfly Calopteryx atrata (Odonata : Calopterygidae)

    MATSUBARA Kazuya , TOJO Sumio , SUZUKI Nobuhiko

    In the territorial damselfly Calopteryx atrata Selys, length of the hindwing, the wing areas and the aspect ratio did not differ significantly among age classes during the pre-reproductive period, while the body mass of males increased about 2.5 times. This is due primarily to increase in mass of thorax and abdomen. The flight muscle mass accounted for the great part of the thorax mass, and began to increase from early in the pre-reproductive period and continued increasing until sexual maturation. The average flight muscle mass of sexually matured males was about 2.4 times of that of the youngest immature ones. On the other hand, the abdomen mass and total lipids increased remarkably in the latter half of the pre-reproductive period. The average total lipid content of mature males was about tenfold of that of the youngest immature ones. The maximum lift production per flesh body mass was positively correlated with the flight muscle mass and total lipid content. Such an increase in flight muscle mass and lipid reserves resulted in the increase of maximum lift force, and probably enhanced flight performance.

    ZOOLOGICAL SCIENCE 22(5), 587-592, 2005-05-25

    J-STAGE  NDL Digital Collections  References (25)

  • Purification and cDNA cloning of an insect defensin from larvae of the longicorn beetle, Acalolepta luxuriosa

    UEDA Kenjiro , IMAMURA Morikazu , SAITO Ayaka , SATO Ryoichi

    We purified an antibacterial peptide from the larval hemolymph of a coleopteran beetle, <i>Acalolepta luxuriosa</i>. Using structure analysis and cDNA cloning, this peptide was identified as a novel member of the insect defensin family and named <i>A. luxuriosa</i> defensin 1. <i>A. luxuriosa</i> defensin 1 shares high sequence similarity with other defensins, especially coleopteran defensins. A dendrogram of coleopteran insect defensins based on sequence homology revealed that <i>A. luxuriosa</i> defensin is closer to Tenebrionoidea defensin than to Scarabaeoidea defensin, which parallels the evolutionary relationship of these coleopteran insects. Although <i>A. luxuriosa</i> defensin 1 was most homologous with <i>Tenebrio molitor</i> tenecin 1, its antibacterial spectrum was broader, affecting the growth of Gram-positive and Gram-negative bacteria, suggesting that the variability of the antibacterial spectrum results from small sequence differences.

    Applied Entomology and Zoology 40(2), 335-345, 2005-05-25

    J-STAGE  References (49)

  • A Study on the Environmental Factors of Nursery Ponds for Naiads of Rare Damselfly Coenagrion terue in Consideration of its Feeding Habit  [in Japanese]

    KUROSAWA Nobuyuki , HANDA Mariko , IMAI Kazutaka , SASAKI Yuka , ITOH Hiroshi , URATO Hideyuki

    Damselfly Coenagrion terue living in Sawada Springs in Hitachi Seaside Park is a rare population as its habitation is near the shore while most other populations of this species are distributed in high lands. Office of Hitachi Seaside Park has been trying to conserve this population by placing ponds and repairing existing ponds in this area. We thought that providing optimal food supply for the naiads, the larval stage of the damselfly, was one of the important means to maintain this population and the strength of sunlight was also an important environmental factor for nursery ponds for the naiads. In this study, to clarify which were actual species of prey for naiads and the relationship between food supply and the degree of sunlight, we examined gut contents of naiads, meiobenthos as prey in ponds, the strength of sunlight and the density of naiads. The main prey of naiads were benthic Arthropoda. Body widths of prey were limited to 100-500μ m and the maximum body widths of prey were proportional to the head widths of naiads. Not only the density of naiads, but also the number of species and the density of prey tended to be lower in dark ponds than those in bright ponds.

    Journal of The Japanese Institute of Landscape Architecture 68(5), 575-578, 2005-03-31

    J-STAGE  References (12) Cited by (1)

  • 東海丘陵要素植物群落の保全生態学的研究--保全・修復とその管理に関する研究(2)中部大学恵那キャンパス内及びその周辺部の昆虫種調査  [in Japanese]

    堀川 大介 , 南 基泰 , 寺井 久慈 [他] , 寺井 久慈 , 上野 薫 , 河野 恭廣 , 谷山 鉄郎

    Annual report of Research Institute for Biological Function (5), 21-35, 2005-03

  • Nraraken no tonboso : 1998nen - 2003nen no chosa kiroku  [in Japanese]

    Ozono Akira , Sakuratani Yasuyuki

    記事区分:資料

    Memoirs of the Faculty of Agriculture of Kinki University (38), 71-155, 2005

    JASI  JASI  Cited by (1)

  • Discovery of Sympetrum vulgatum imitans Selys from the Noto Peninsula, Japan

    Taketo Akira

    Mature males of Sympetrum vulgatum initans Selys, Far East subspecies of a sympetrini dragongly S. vulgatum Linne, were first taken in the Noto Peninsula, Central Japan, at the end of September, 2002.

    Memoirs of the Fukui University of Technology (35), 205-207, 2005

    IR 

  • Dragonflies (Odonata) of the Tokiwamatsu Imperial Villa, Tokyo, Central Japan  [in Japanese]

    Saito Yoichi , Owada Mamoru

    The Tokiwamatsu Imperial Villa is ca. 2 ha in area, and located in the central part of urban Tokyo. In the garden, there is a rather small, well kept pond, and faunal investigations on the dragonflies were carried out from 2002 to 2004. A total of 18 species belonging to 5 families were recorded, and larvae and larval cases of 9 species were found in the pond. Ceriagrion nipponicum, a rare damselfly in Tokyo, was discovered, and it is worth noting thatAnaciaeschna martini, Anax nigrofasciatus and Rhyothemis fuliginosa inhabited the pond.

    Memoirs of the National Science Museum (39), 431-438, 2005-03

  • Dragonflies (Odonata) of the Akasaka Imperial Gardens, Tokyo, Central Japan  [in Japanese]

    Saito Yoichi , Owada Mamoru , Kato Shun-ichi

    Faunal investigations on the dragonflies were made at the Akasaka Imperial Gardens, ca. 51 ha, central Tokyo, from 2002 to 2004. A total of 24 species belonging to 6 families were recorded. At the Imperial Palace, Tokyo (1996-2000), 27 species in 8 families were recorded (Tomokuni & Saito, 2000), and 29 species in 7 families were enumerated from the Institute for Nature Study (1998-2000) (Suda, 2001). The fauna of dragonflies is the richest in the smallest pond at the Akishinonomiya residence, in which as many as 18 species were collected by three supplemental researches in 2004.

    Memoirs of the National Science Museum (39), 419-430, 2005-03

  • Saline Tolerance of Young Zygopteran Larvae Inhabiting the Emergent Plants Community Established in Estuaries  [in Japanese]

    IWATA Shu-ko , WATANABE Mamoru

    汽水域に成立したヨシ群落に生息するヒヌマイトトンボと,隣接する淡水の放棄水田に出現したアオモンイトトンボおよびアジアイトトンボ,モートンイトトンボの卵および幼虫の塩分耐性を比較した.卵を0‰(蒸留水),5‰,10‰,15‰,20‰の濃度の塩水に入れ,4齢幼虫になるまで飼育した.どの種も高い塩分濃度で孵化率が低下し,アジアイトトンボとモートンイトトンボは20‰の塩分濃度で全く孵化しなかった.この2種は15‰における幼虫の生存率も低かった.一方ヒヌマイトトンボとアオモンイトトンボにおける塩分濃度に対する孵化率と幼虫の生存率の変化は,ほとんど同じで,この2種は汽水環境で十分生息できると考えられた.これらの結果から,ヒヌマイトトンボの保全を行うためには,幼虫の生息場所の塩分濃度の調節とともに,成虫の生息空間も考慮すべきであると指摘した.

    Japanese Journal of Entomology (New Series) 7(4), 133-141, 2004

    IR  J-STAGE  References (22) Cited by (1)

  • Dynamics of reed community artificially established for conservation of the endangered damselfly Mortonagrion hirosei and odonate larvae inhabiting the community  [in Japanese]

    MATSU'URA Satoko , WATANABE Mamoru

    ヒヌマイトトンボの保全を目的として,生息地に隣接する休耕田に人為的にヨシ群落を創出した.4月から11月にかけて,群落内に設置した方形区でヨシの生長を測定すると共に,ヒヌマイトトンボの生息空間であるヨシ群落下部における相対照度や水温などの変化を既存の生息地と比較した.創出地で芽生えたヨシの稈の数は既存の生息地とほぼ同様であったが,細く低かったため,群落下部の照度は高くなっていた.創出地には多種の蜻蛉目成虫が飛来していたが,秋にはごく少数のヒヌマイトトンボと多数のアオモンイトトンボの幼虫しか採集されなかった.後者はヒヌマイトトンボの捕食者であり,この種を創出地から排除するためには,群落の水質を汽水に保つばかりでなく,枯死した稈を残してヨシ群落を密生させる必要があると考えられた.

    Japanese Journal of Conservation Ecology 9(2), 165-172, 2004

    J-STAGE  References (20) Cited by (1)

  • Distribution of aquatic animals in the drainage systems created by paddy farmland consolidation in Shimodate City, Ibaraki Prefecture, Japan  [in Japanese]

    MATSUI Akira , SATOH Masayoshi

    湿田の乾田化,用排水路の分離等によって農業の効率性を目指す従来の水田圃場整備に対して,生物多様性保全の観点から様々な問題が指摘されている.2001年6月に土地改良法が改正され,環境との調和に配慮した農業農村整備事業が強く求められることになった.コンクリート水路の土水路化,排水路と水田との連続性確保等の環境に配慮した事業は,生物にとっては望ましいが,現実には従来型の整備による水田が広範に残ることが予想され,これらの区域もまた地域全体の環境に大きな影響をもち続けると思われる.従って,整備済み水田地区において,少なくとも最小限の環境対策の実施が望まれ,その対策を効果的に行うためには,整備済み水田地区における水生生物の生息実態を知る必要がある.その知見は,将来実現が期待される冬季通水の具体的方法を検討する上でも有用である.本研究は,茨城県下館市の圃場整備済み水田地区の排水路を取り上げ,水路レベルを考慮した6調査地点において,2001年4月から2002年3月の間毎月1回定期的に実施した現地調査に基づき,水生生物が種類に応じて幹線,支線および小排水路にどのように分布しているかを,水路構造および非灌漑期における流水の有無に注目して検討し,以下のことを明らかにした.魚類については,オイカワが幹線排水路,ドジョウが支線および小排水路で多く採捕された.水生昆虫については,ハグロトンボが支線排水路,シオカラトンボが小排水路で多く採捕された.オイカワは幹線排水路のなかで,水路底が砂礫の地点で多く,コンクリートの地点で少なかった.ハグロトンボおよびシオカラトンボは支線および小排水路のなかで,1年中流水がある地点で多く,非灌漑期に流水がない地点で少なかった.逆に,ノシメトンボは小排水路のなかで,1年中流水がある地点で少なく,非灌漑期に流水がない地点で多かった.以上の調査結果から,水田圃場整備によって造成された排水路系は,水深,流速等に関して特徴ある物理環境を有する幹線,支線および小排水路から成っており,また水生生物がそれぞれの水路レベルに応じて生息していると解釈すべきことを明らかにした.今後,より一層整備済み水田地区を生物相豊かな環境にするためには,より多くの水路に1年中流水を確保すること,水路底をコンクリート化しないことが重要である.

    Japanese Journal of Conservation Ecology 9(2), 153-163, 2004

    J-STAGE  References (23) Cited by (4)

  • An Introduction to Insect Sociology  [in Japanese]

    TAMURA Masato

    昆虫の社会とは,「同種の2個体以上の個体間で起こる,種を維持していくうえの協同的相互関係」と定義され,単独生活をするものも含めて,種はすべて社会をなしているとみなされる.したがって「真社会性」とは,(1)両親以外に子育てを手伝う個体がいる(共同育児),(2)2世代以上が同居して一緒に暮している(世代の重なり),(3)子を産む個体と産まない個体(不妊カスト)とがいる(繁殖に関する分業)の3つを完全に備えた「高度に発達した社会」を指す.ハチ(膜翅)目の,このような真社会性に至る道すじには2つのルートが想定される.その1つは,母娘による単一家族ルート(サブソシアル・ルート)で,まず母親が長期間子を世話することで世代の重複が起こり,次に成長した子が妹や弟の世話,巣の掃除や防衛などを分坦するようになり,最終的には自分では繁殖しなくなって繁殖上の分業が成立する.もう1つは,複合家族による共同巣ルート(セミソシアル・ルート)である.まず繁殖メスが複数集まり近接して営巣することから始まって巣や子の防衛に共同で当たるようになり,次に最優位のメスがしだいに独占的に繁殖するようになって,最終的には繁殖の分業が成立するとともに世代の重複によって若いメスが完全にワーカー化するのである.シロアリとミツバチの階級分化には違いがある.シロアリの階級分化は,内因説と外因説があり,前者は遺伝的,あるいは胚の時代に階級分化が決定されているとするもので,後者は卵からふ化した幼虫は,あらゆる階級に分化する能力をもっているが,コロニーの状態によってどの階級に分化されるかが決定される,その決定にはフェロモン,栄養,行動刺激が関係するという説である.一方ミツバチでは,未受精卵(染色体数n=16)からは雄バチが,受精卵(2n=32)からは雌バチが産まれる.さらに女王バチと働きバチの分化は,与えられる餌の質と量の違いにより幼虫期の前期に決定し,階級の維持には起動フェロモン(primer pheromone)が関与する.

    House and household insect pests 26(2), 149-157, 2004-12-15

    NDL Digital Collections  References (21)

  • Habitat use by the Tiny Dragonfly, Nannophya pygmaea RAMBUR, and conservation of its habitat in a hillside marsh  [in Japanese]

    UEDA Tetsuyuki , KINOSHITA Eiichiro , ISHIHARA Kazuhiko

    石川県金沢市郊外の丘陵地において,ハッチョウトンボの場所利用を中心とした調査を行った.調査地は谷津田の最上段にある広さ1,200m^2の休耕田で,毎年トラクターによる耕起は行われているが,イネは栽培されていない.耕起部分には,冠水状態により4つの群落が広がり,そのうちの1つ(群落1)は一年生草本を中心とした湿地性植物群落,残りは陸生植物群落であった.耕起部分の外側は湧水湿地になっており,湿地性多年生草本を主とした群落(群落2)が発達していた.ハッチョウトンボの成熟雄は群落1と2に分布し,調査した2年間では,とくに群落2で類似した分布を示した.雌と未成熟雄は陸生植物群落に分布していた.幼虫も群落1と2を利用していたが,群落1では年により羽化がみられなかった.夏の降水量が少ない年は長期間干上がってしまうためと考えられた.調査地から分散したと思われる成虫を周辺の湿地で確認した.もっとも離れた地点は1.5kmであったが,1km以内が多かった.これらの結果などから,ハッチョウトンボは,一時的な小湿地に適応した機会的な種と考えられた.ハッチョウトンボ個体群を保全するために,丘陵地帯にある放棄水田を耕起によって湿性ビオトープとして整備し,そのネットワーク化を図るべきであるという提案を行った.

    Japanese Journal of Conservation Ecology 9(1), 25-36, 2004

    IR  J-STAGE  References (18) Cited by (1)

  • A Revision of the Genus Cincticostella (Insecta : Ephemeroptera : Ephemerellidae) from Japan

    Ishiwata Shin-ichi

    The Japanese mayfly genus Cincticostella is taxonomically revised. The four currently recognized species are Cincticostella (Cincticostella) elongatula (McLachlan, 1875) (=okumai Gose, 1980, syn. nov.), C. (C.) levanidovae (Tshernova, 1952), C. (C.) nigra (Ueno, 1928), and C. (C.) orientalis (Tshernova, 1952) (=tshernovae (Bajkova, 1962). The lectotype and paralectotypes of Ephemerella nigra are designated from the syntypes of Ueno. Specimens treated as C. (C.) nigra by many authors are identified with C. (C.) elongatula. All species are redescribed based on examined types and newly collected specimens. Keys are given to all stages : imagoes, subimagoes, nymphs, and eggs. Illustrations, complete synonymies, and distributional records are included for all the species, and the life histories of two species, C. (C.) elongatula and C. (C.) nigra, are presented.

    Species Diversity 8(4), 311-346, 2003

    J-STAGE  References (79) Cited by (1)

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