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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

Ergebnisse anatomischer Untersuchungen an Standfuss'schen Lepidoteren-bastarden III. Folge /

Malan, David Edward. January 1917 (has links)
Thesis--Universität Zürich.

Feeding and growth of three Lepidoptera species as influenced by natural and altered nutrient and allelochemical concentration in their diet

Manuwoto, Syafrida. January 1984 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1984. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographies.

Population dynamics of the Lodgepole Needle Miner, Recurvaria starki Free. (Lepidoptera: Golechiidae) in Canadian Rocky Mountain parks

Stark, Ronald William January 1957 (has links)
The lodgepole needle miner, Recurvaria starki Free. has been studied intensively since 1948. Until 1953, this insect was referred to in publications as Recurvaria millerl Busck. The life history and taxonomic position of R. starki are reviewed briefly and an historical review of the research carried on since 1948 is given. A full description is given of the procedure of applying life table techniques to needle miner studies since 1954 and examples are given for selected study areas. Six sampling intervals, one egg, four larval and one pupal are deemed suitable to assess the course of the population of a single generation from the time of oviposition to moth emergence. The life tables and survivorship and death-rate curves show clearly that there are five periods in the two-year life cycle of the lodgepole needle miner during which extensive mortality may occur: (1) between egg formation and oviposition; (2) between oviposition and larval establishment; (3) during the first larval hibernation; (4) during the second larval hibernation; (5) during the spring of moth emergence. Population success is also undoubtedly affected by conditions during the adult life. Population sampling has shown that the outbreak has declined since 1948. Defoliation and increment studies have shown that the period of greatest defoliation occurred from 1940 to 1944 and that the outbreak probably began in the late 1930's. The major cause of the decline was winter temperatures, probably during the coldest month. From laboratory experiments and population sampling compared with weather records it is estimated that needle miner populations can have a high survival if extreme minima of -30°F to -40°F do not persist long enough to depress the mean monthly temperature to near 0°F. Parasitism was not a particularly important factor in the outbreak decline probably because of a greater depressant effect on parasite populations by winter temperatures. Other natural control factors are discussed as well as the possible effects of climatic factors on oviposition and fecundity. From a detailed survey of weather records since 1920 and yearly averages since 1885 it is postulated that release of the needle miner population was due to a warming trend in the climate of the region. This began in the late 1930's, reached a peak in the mid-1940's and has declined since that time. The warming trend has been noted by other authors for northern latitudes and is substantiated by the weather records of this region. It is further postulated that the climate of this part of western Canada is generally too severe for an outbreak of the lodgepole needle miner, Recurvaria starki Free, to be prolonged. / Forestry, Faculty of / Graduate

Migratory and foraging movements in diurnal neotropical Lepidoptera : experimental studies on orientation and learning /

Oliveira, Evandro Gama de, January 1998 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 1998. / Vita. Includes bibliographical references (leaves 133-153). Available also in a digital version from Dissertation Abstracts.

Recherches sur la biologie et la dynamique des populations naturelles d’Archips Argyrospilus (Wlk.) (Lepidopteres: Tortricidae) dans le sud-ouest du Quebec.

Paradis, Rodolphe-O. January 1964 (has links)
La Tordeuse du Pommier, Archips argyrospilus (Wik.), pullule périodiquement dans les pommeraies du Québec et cause alors des dégâts onéreux en détériorant les pousses et les fruits. Au cours d'une récente invasion, qui a débuté en 1956, des travaux de recherches ont été entrepris à la fois sur la biologie, l'écologie et la répression de ce ravageur. Ces recherches s'imposaient premiaèrement pour connaître le cycle évolutif et la biologie générale de l'insecte sous les conditions climatiques du Québec, études qui n'avaient jamais été entreprises auparavant et, deuxièmement pour connaître le comportement des populations naturelles en mesurant leurs fluctuations saisonnières et en essayant de déterminer les facteurs responsables de ces fluctuations. Ces connaissances dans leur ensemble s'avéraient fondamentales tant pour enrayer de façon méthodique les pullulations actuelles de l'insecte que pour essayer de prévoir et de prévenir les invasions futures. [...]

Observations on Crambus and closely allied forms in Kansas, with special reference to Crambus vulgivagellus Clem.

Miller, Hans David Oliver January 1939 (has links)
No description available.

Potential lethal and sublethal effects of gypsy moth biological treatments on non-target Lepidopterans in two Appalachian forests

Rastall, Kenneth Edward. January 1999 (has links)
Thesis (Ph. D.)--West Virginia University, 1999. / Title from document title page. Document formatted into pages; contains x, 149 p. : ill. Vita. Includes abstract. Includes bibliographical references (p. 138-142).

Drugių (Macrolepidoptera) tyrimai Kauno rajono Lapių apylinkėse / Investigations of butterflies (macrolepidoptera) in lapės environs of kaunas district

Ūsaitis, Tomas 25 November 2010 (has links)
Tyrimai buvo atliekami 1997–2006 metais, Kauno rajono Lapių apylinkėse. Naktiniai drugiai gaudyti 1997–2006 metais, šalia Lapių gyvenvietės esančioje sodų bendrijoje “Šatijai” ir netoli Smiltynų gyvenvietės esančioje ganykloje Neries slėnyje. Dieniniai drugiai tyrinėti 2005-2006 metais Šančių, Staviščių ir Varluvos miškuose, bei sodų bendrijoje „Šatijai“. Medžiaga surinkta ir išanalizuota pagal įprastas metodikas ir naudojant atitinkamą literatūrą. Tyrimų metu rasta 615 makrodrugių rūšių. 540 naktinių ir 75 dieninių drugių rūšys. Sugauti drugiai priklausė 23 šeimoms. Gausiausios šeimos: pelėdgalviai (Noctuidae) – 230 rūšių, sprindžiai (Geometridae) – 199 rūšys, nimfalijos (Nymphalidae) – 34 rūšys, kuoduočiai (Notodontidae) – 24 rūšys, meškutės (Arctiidae) – 21 rūšis. Daugiausiai Lapių apylinkėse rastų makrodrugių rūšių yra būdingos lapuočių ir mišriems miškams (51 %), mažiausiai rūšių būdingų spygliuočių miškams (4 %). Sugautų drugių tarpe nemažai rūšių, būdingų pietryčių Lietuvai. Viso tyrimų metu registruoti ir apibūdinti 33733 drugiai, 27402 naktiniai ir 6331 dieninis drugys. Iš naktinių drugių daugiausiai sugauta pelėdgalvių (Noctuidae) - 16092 individai, sprindžių (Geometridae) - 7008 individai. Didžiausią dalį dieninių drugių sudarė pleštekių (Nymphalidae) ir baltukų (Pieridae) šeimų atstovai, atitinkamai 2913 ir 1744 individai. Gausiausios rūšys buvo - Pieris napi L., Aphantopus hyperantus L., Diachrysia tutti Kostr., Discestra trifolii Hfn., Xestia c-nigrum L... [toliau žr. visą tekstą] / Investigations of Macrolepidoptera were carried out in 5 localities of Kaunas district, Lapės environs: Šatijai, Smiltynai, Varluva forest, Šančiai forest and Staviščiai forest in 1997 – 2006. Butterflies and moths were collected and studied with the aid of conventional methods and available publications. There were determined 615 species belonging to 23 lepidopteron families (540 species of moths and 75 species of butterflies). Family Noctuidae was the most numerous. There were found 230 species belonging to that family. Totally 199 species of Geometridae, 34 of Nymphalidae, 24 of Notodontidae and 21 species of Arctiidae were found during investigations. 51 % of collected species are typical for forest habitats and many of them are typical for Southeastern Lithuania. Totally there were 33 733 individuals collected and studied during whole ivestigation period (27 402 moths and 6331 butterflies). Family Noctuidae was also the most abundant in number of collected specimens (16 092). 7008 specimens belonging to Geometridae, 2913 to Nymphalidae and 1744 to Pieridae were collected and studied during fromLapes environs. The most abundant species were: Pieris napi L., Aphantopus hyperantus L., Diachrysia tutti Kostr., Discestra trifolii Hfn., Xestia c-nigrum L., Agrotis exlamationis L. 196 detected species are rare or very rare. 11 species of butterflies are included in Red Data Book of Lithuania: Carterocephalus palaemon Pall., Papilio machaon L., Lycaena dispar Hw., Maculinea... [to full text]

Puščios pelkės ekologinės būklės įvertinimas, remiantis dieninių drugių bioįvairove / Evalution of puščia bog ecological condition based on biodiversity of butterflies

Lučun, Julija 25 November 2010 (has links)
Tyrimų tikslas ištirti Puščios pelkės dieninių drugių bioįvairovę ir palyginti su natūralia Kernavo pelke. Drugių santykiniam gausumui nustatyti buvo naudojamas maršrutinis metodas. Buvo užregistruota 31 drugių rūšis (302 individai), priklausantys penkioms šeimoms: vienai naktinių drugių šeimai ir keturioms dieninių drugių šeimom. Išskirtos 12 stenotopinių (tirfobiontinės ir tirfofilinės) drugių rūšys: 6 tirfobiontinės (baltajuostis melsvys (Aricia eumedon), pelkinis melsvys (Plebeius optilete), žalsvasis varinukas (Callophrys rubi), miškapievis perlinukas (Boloria euphrosyne), blyškusis žaliasprindis (Jodis putata), rudasprindis (Ematurga atomaria) ir 6 tirfofilinės (žaliaakis melsvys (Plebeius idas), didysis auksinukas (Lycaena dispar), rausvasis perlinukas (Argynonome laodice), mažasis perlinukas (Boloria dia), gelsvasis perlinukas (Brenthis ino), pievinis perlinukas (Boloria selene). Visos kitos užregistruotos rūšys yra tirfoneutralios, kurios nėra būdingos aukštapelkių ekosistemoms. Trijose skirtingose buveinėse: atstatomo durpyno pamiškė, atstatomas durpynas ir natūralios pelkės pamiškė buvo užregistruotas skirtinga drugių rūšių įvairovė bei rūšių gausumas. Skurdžiausia rūšių įvairove ir rūšių gausumu pasižymėjo atstatomo durpyno drugių bendrija, dėl mitybinių augalų nebuvimo ir nenusistovėjusio hidrologinio režimo. Puščios pelkės drugių bendrijos sudėtis yra panaši į aukštapelkių, nors nebuvo užregistruotos reliktinės drugių rūšys: pelkinis satyras (Oeneis jutta)... [toliau žr. visą tekstą] / The aim of this work was to study butterflies and moths (Macrolepidoptera) and their diversity in the Puščia peat bog and to compare it with natural Kernavas peat bog. The abundance of butterflies and day-active moths’ species was evaluated using transect method. A total of 302 Lepidoptera specimens belonging to 31 species and five families (one moth family and four butterflies’ families) were registered. Twelve species (six tyrphobiontic (Aricia eumedon, Plebeius optilete, Callophrys rubi, Boloria euphrosyne, Jodis putata, and Ematurga atomaria) and six tyrphophilous (Plebeius idas, Lycaena dispar, Argynome laodice, Boloria dia, Brenthis ino, and Boloria selene) were obligatory associated with peat bogs. Other species showed no preference to bogs. Three different habitats of Puščia peat bog were studied: renewable peat bog’s site, renewable peat bog and natural peat bog outskirt. Variety and abundance of different lepidopterans species were recorded in the studied habitats. The sparse abundance and variety of butterflies species was noted in the renewable peat bog habitat due to sparse vegetation, upset hydrological regime and exploitation of peat. The diversity of butterflies in Puščia peat bog seems to be typical to the raised bog ecosystem, though relict species (e.g. Oeneis jutta, Proclossiana eunomia and Colias palaeno) were not found there. The absence of these species shows degradation of the Puščia peat bog. The Puščia bog is a valuable site for some rare butterrfly... [to full text]

Resistance against endotoxin from Bacillus thuringiensis in Lepidopteran insects / Muhammad Sarjan.

Sarjan, Muhammad January 2002 (has links)
"December 2002" / Bibliography: leaves 99-118. / ix, 118 leaves : ill. (some col.), plates (some col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / The major aim of this study was to investigate the possible molecular mechanism of resistance against Bt-toxin based on observations that Bt-toxin binds to a soluble immune-defence component. The binding of Bt-toxin to glycosylated lipophorin in the gut was found to be consistent with a model where the toxin is inserted into the membrane by an endocytosis mechanism. In resistant insects, the primary Bt-target is an immune-complex in the gut lumen and at the peritrophic membrane, which inactivates the toxin by a coagulation process. / Thesis (Ph.D.)--University of Adelaide, Dept. of Applied and Molecular Ecology, 2003

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