To see the other types of publications on this topic, follow the link: Beetles Coleoptera.
Dissertations / Theses on the topic 'Beetles Coleoptera'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Beetles Coleoptera.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Stribling, James B. "World generic revision of Ptilodactylidae (Coleoptera, dryopoidea) /." Connect to resource, 1986. http://rave.ohiolink.edu/etdc/view.cgi?acc%5Fnum=osu1273752066.
Full text
2
Eyres, M. D. "Aspects of the distribution of water beetles and ground beetles (Coleoptera)." Thesis, University of Newcastle Upon Tyne, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.332348.
Full text
3
Leavengood, John Moeller. "The checkered beetles (Coleoptera: Cleridae) of Florida." [Gainesville, Fla.] : University of Florida, 2008. http://purl.fcla.edu/fcla/etd/UFE0023794.
Full text
4
Foley, Ian Andrew. "A review of the ironclad beetles of the world (Coleoptera Zopheridae: Phellopsini and Zopherini) /." Thesis, Montana State University, 2006. http://etd.lib.montana.edu/etd/2006/foley/FoleyI0806.pdf.
Full textAbstract:
Phellopsis LeConte is revised. Phellopsis porcata (LeConte) is returned to valid status and P. yulongensis NEW SPECIES is described. Phellopsis montana Casey NEW SYNONYMY (NS) and P. robustula Casey NS = P. porcata (LeConte). Phellopsis imurai Masumoto = P. amurensis (Heyden) NS. Species redescriptions, a key to species and notes on the history, biology and biogeography of the group are provided. Phylogenetic analyses support several changes to sustain monophyletic genera of Zopherini because the genera Meralius Casey, Nosoderma Solier, and Phloeodes LeConte were found to be polyphyletic. The genus Sesaspis Casey NEW STATUS is re-recognized, and redescribed to include the following species: Sesaspis denticulata (Solier), S. emarginatus (Horn) NEW COMBIATION (NC), S. lutosus (Champion) NC, S. doyeni (GarciÌa-PariÌs et al.) NC, S. adami NEW SPECIES, S. ashei NEW SPECIES, and S. triplehorni NEW SPECIES. Phloeodes LeConte is clarified with 10 new synonymies [P. diabolicus (LeConte) = P. pustulosus (LeConte) NS, P. latipennis Casey NS, P. ovipennis Casey NS, P. elongatus Casey NS, P. scaber Casey NS, P. angustus Casey NS, and P. remotus Casey NS). Phloeodes plicatus (LeConte) = Noserus torvus Casey NS, Noserus collaris Casey NS, Noserus corrosus Casey NS, Noserus convexulus Casey NS]. Phloeodes venustus (Champion) NC is supported as a member of this clade extending the known range of the genus into Central America. Noserinus furcatus (Kirsch) NC is moved from Meralius Casey. Meralius clavapilus NEW SPECIES is described from Venezuela. Eleven new synonyms are proposed in Nosoderma Solier (N. championi Casey NS, N. prominens Casey NS, N. senex Casey NS, N. brevicolle Casey NS, and N. subglabrum Casey NS = N. inaequalis (Say); N. interruptum Champion NS = N. insigne Champion; N. carinatum Champion NS, N. anceps Champion NS, N. impressum Champion NS, and N. longipennis Casey NS = N. exsculptum Champion; and N. squalidus Casey NS = N. guatemalensis Champion). Scoriaderma congolense Fairmaire NS is a junior synonym of Nosoderma scabrosum Solier. Keys to the genera of Zopherini and species of Meralius Casey, Noserinus Casey, Nosoderma Solier, Phloeodes LeConte and Sesaspis Casey are provided, with illustrations of all included species of the genera mentioned.
5
Whitlow, Sonia. "Recognition in burying beetles (Nicrophorus spp., Silphidae, Coleoptera)." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=972110240.
Full text
6
Hewson, Nicola. "Conservation biology of rare leaf beetles (Coleoptera: Chrysomelidae)." Thesis, University of Leeds, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.432389.
Full text
7
Ivie, Michael A. "Phylogenetic Studies in the Bostrichiformia (Coleoptera)." The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1392387278.
Full text
8
Hopp, Katie Jo. "A revision of the West Indian genus Nesocyrtosoma (Coleoptera: Tenebrionidae)." Thesis, Montana State University, 2008. http://etd.lib.montana.edu/etd/2008/hopp/HoppK1208.pdf.
Full textAbstract:
Nesocyrtosoma Marcuzzi is revised. There is a total of 45 species of the genus Nesocyrtosoma, 27 of them are newly described here (N. bestiola NEW SPECIES, N. lacrima NEW SPECIES, N. neibaense NEW SPECIES, N. scabrosum NEW SPECIES, N. simplex NEW SPECIES, N. bankense NEW SPECIES, N. curvum NEW SPECIES, N. dentatum NEW SPECIES, N. fernandoi NEW SPECIES, N. garridoi NEW SPECIES, N. guerreroi NEW SPECIES, +N. minisculum NEW SPECIES, N. nearnsi NEW SPECIES, N. productum NEW SPECIES, N. puertoricense NEW SPECIES, N. serratum NEW SPECIES, N. skelleyi NEW SPECIES, N. teresitae NEW SPECIES, N. altagracia NEW SPECIES, N. basilense NEW SPECIES, N. crenulatum NEW SPECIES, N. darlingtoni NEW SPECIES, N. dolosum NEW SPECIES, N. larseni NEW SPECIES, N. mutabile NEW SPECIES, N. otus NEW SPECIES, and N. purpureum NEW SPECIES). Cnodalon trinitatis Zayas is a synonymized with Cyrtosoma (Nesocyrtosoma) inflatum Marcuzzi NEW SYNONYMY. Cnodalon inflatum Zayas is synonymized with Cyrtosoma (Nesocyrtosoma) tumefactum Marcuzzi NEW SYNONYMY. Cyrtosoma (Nesocyrtosoma) gebieni Marcuzzi is recognized for the first time as Nesocyrtosoma gebieni (Marcuzzi) NEW COMBINATION. The following Zayas Cnodalon species are moved to Nesocyrtosoma under the new combinations: Nesocyrtosoma turquinense (Zayas) NEW COMBINATION, Nesocyrtosoma cuprosum (Zayas) NEW COMBINATION and Nesocyrtosoma elongatum (Zayas) NEW COMBINATION. Cyrtosoma (Nesocyrtosoma) ferruginea Garrido and GutieÌrrez is recognized for the first time as Nesocyrtosoma ferruginea (Garrido and GutieÌrrez) NEW COMBINATION. Cyrtosoma (Pachycyrtosoma) Marcuzzi is synonymized with Nesocyrtosoma NEW SYNONYMY. Cyrtosoma (Pachycyrtosoma) merkli Marcuzzi is here recognized as Nesocyrtosoma merkli (Marcuzzi) NEW COMBINATION, and Cyrtosoma (Pachycyrtosoma) hispaniolae Marcuzzi is here recognized as Nesocyrtosoma hispaniolae (Marcuzzi) NEW COMBINATION. Serrania Garrido is synonymized with Nesocyrtosoma NEW SYNONYMY. Serrania viridula (Zayas) is synonymized with Platydema virens LaPorte and BrulleÌ NEW SYNONYMY, and is recognized as Nesocyrtosoma virens (LaPorte and BrulleÌ) NEW COMBINATION. Apsida cubanensis (Kulzer) is placed in Nesocyrtosoma under the new combination Nesocyrtosoma cubanense (Kulzer) NEW COMBINATION.
9
Bouchard, Patrice. "Systematics and biogeography of the Australian wet tropics coelometopini (Coleoptera: Tenebrionidae: Coelometopinae) /." St. Lucia, Qld, 2002. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16090.pdf.
Full text
10
Botes, Antoinette. "Heterogeneity of dung beetle (Coleoptera: Scarabaeidae) assemblages in northern KwaZulu-Natal, South Africa : conservation implications." Pretoria: [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-11212005-111029.
Full text
11
Dury, Guillaume. "Evolution of cycloalexy in neotropical Chrysomeline beetles (Coleoptera: Chrysomelidae)." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=119668.
Full textAbstract:
The larvae of some insects arrange themselves in a tight, orderly circle at rest; a behaviour that Vasconcellos-Neto and Jolivet (1988b) first called "cycloalexy". The word was defined by Jolivet and collaborators in 1990 as a defensive behaviour adopted by insect larvae that form a tight circle with the best defended extremity at the periphery, either heads or abdomens. The formation is also associated with coordinated movements to repel threats. The term has steadily gained acceptance and expanded to include insect nymphs, adult insects and even vertebrates. We review reports of cycloalexy and find the behaviour is less common than suggested. Convincing examples are found only in sawflies, leaf beetles, caterpillars, one weevil and one midge species. We question reports of cycloalexy in penguins, an amphipod crustacean, nymphs of Hemiptera and larvae of Hymenoptera and Neuroptera. We argue that analogous behaviours in mammals are reactive rather than preventive and, hence, not cycloalexic. A molecular phylogeny was reconstructed to evaluate the relationships of 70 species of Neotropical Chrysomelinae and the evolution of cycloalexy. We sequenced five gene segments: nuclear protein-coding CAD and 28S rDNA, mitochondrial 12S rDNA and protein-coding COI and COII. The phylogeny was inferred using Bayesian and Maximum Likelihood (ML) methods and ancestral larval behaviour was reconstructed with ML and Maximum Parsimony methods. The ancestral behaviour reconstructions show five independent evolutionary origins of larval gregariousness in Neotropical chrysomeline beetles, two with maternal care and circular grouping of larvae and one accompanied by cycloalexy. Further, our phylogeny clarifies relationships within Chrysomelinae, and shows a revision is needed: the genus Stilodes is paraphyletic with Zygogramma, Platyphora is polyphyletic and divided into two clades; one with Doryphora nested within and the other with Proseicela.<br>Les larves de certains insectes forment un cercle serré et ordonné au repos, un comportement appelé « cycloalexie » pour la première fois par Vasconcellos-Neto et Jolivet) (1988b). Le mot a été défini par Jolivet et collaborateurs en 1990 comme étant un comportement défensif de larves d'insectes qui forment un cercle serré, avec l'extrémité la mieux défendue à la périphérie. soit leurs têtes ou leurs abdomens. La formation est aussi associée à des mouvements coordonnés du groupe pour repousser les menaces. Le terme a progressivement gagné en acceptation et s'est élargi pour inclure des nymphes d'insectes, des insectes adultes et même des vertébrés. Nous faisons la revue des rapports de cycloalexie et trouvons que le comportement est moins rependu que suggéré. Les exemples convaincants ne se retrouvent que chez les mouches à scie, les chrysomèles, les chenilles, une espèce de charançon et une de moucheron. Nous questionnons les rapports de cycloalexie chez les manchots, un crustacé amphipode, des nymphes d'hémiptères et des larves d'hyménoptères et de névroptères. Nous suggérons que les comportements analogues chez les mammifères sont réactifs plutôt que préventifs, et donc pas cycloalexiques. Une phylogénie moléculaire a été reconstruite pour évaluer les relations de 70 espèces de Chrysomelinae néotropicales et l'évolution de la cycloalexie. Nous avons séquencé des segments de cinq gènes : les gènes nucléaires CAD codant et 28S ribosomal, et les gènes mitochondriaux 12S ribosomal et COI et COII codants. La phylogénie a été inférée en utilisant des méthodes bayésienne et de Maximum de Vraisemblance (MV), le comportement ancestral des larves a été reconstruit à l'aide de méthodes de MV et de Maximum de Parcimonie. La reconstruction du comportement ancestral montre cinq origines évolutives indépendantes du grégarisme des larves chez les chrysomèles Néotropicales, deux avec soins maternels et regroupement circulaire des larves et une accompagnée de cycloalexie. De plus, notre phylogénie clarifie les relations à l'intérieur des Chrysomelinae, et montre qu'une révision est nécessaire : Stilodes est paraphylétique avec Zygogramma, Platyphora est polyphylétique et divisé en deux clades; l'un avec Doryphora imbriqué dedans et l'autre avec Proseicela.
12
Serjeant, Anthony Frederick. "The ecology of great diving beetles (Dytiscus spp.) in the Somerset levels and moors." Thesis, University of Sussex, 2013. http://sro.sussex.ac.uk/id/eprint/48643/.
Full textAbstract:
Dytiscid beetles are significant predators in freshwater aquatic ecosystems, playing a major role in structuring macro-invertebrate communities in some habitats (Cobbaert et al 2010). Great Diving Beetles (Dytiscus spp.) can be among the top predators, yet more than one species may be present in a particular physical location, prompting questions regarding how the Dytiscus species co-exist. This study investigated Dytiscus marginalis Linneaus 1758 and the much rarer Dytiscus dimidiatus Bergsträsser 1778 which occur together in drainage ditch ecosystems in the Somerset Levels and Moors in the United Kingdom. Estimates of niche breadths were made in relation to seasonal activity patterns, habitat usage and prey in order to gauge the degree of specialisation displayed by the two species. Findings broadly supported the view that D. marginalis is more of a generalist species than D. dimidiatus, however, a considerable degree of niche overlap was shown to exist. Evidence was found of a stronger preference in D. dimidiatus for shaded watercourses and for sections of ditch with less extensive coverage of duckweed (Lemna spp.) in the early part of the season. There were indications of both inter-specific and intra-specific predation of larvae by adults and larvae of Dytiscus spp. A major challenge overcome during the study concerned how to distinguish the larvae of the two species. Molecular ecological techniques (RAPD, PCRs and gene sequencing) were compared with morphological means to determine species identity. A relatively simple molecular method was found to distinguish the species based on species-specific sequences within a short fragment of the mitochondrial cytochrome oxidase 1 (CO1) gene. This technique successfully identified 90% of 108 individual larvae tested whereas morphology-based analysis failed to resolve them. The implications for conservation practice arising from these observations are discussed in relation to D. dimidiatus, which is considered at risk in the UK.
13
Lott, Derek Arthur. "The semi-aquatic habitats of terrestrial Coleoptera in a lowland river floodplain." Thesis, University of Newcastle upon Tyne, 1999. http://hdl.handle.net/10443/3632.
Full textAbstract:
281 species of terrestrial ground-living beetles were recorded from 69 riparian and wetland sites in the floodplain of the lowland River Soar, England. Differences in species composition between pitfall trapped and timed hand-collected samples were smaller than those attributable to environmental and seasonal factors. Detrended Correspondence Analysis consistently ranked all sites against seasonal variations between April and June and floodplain sites against annual variations. DCA axis 1 scores were slightly better correlated with important environmental variables at the ecohabitat (<5Om) scale rather than the microhabitat scale. Canonical Correspondence Analysis detected assemblage responses to flooding disturbance and grazing pressure along the main channel as well as to water level stability in the floodplain. A conceptual model of floodplain land-use and river management postulated a dynamic equilibrium between flooding disturbances and vegetational succession, producing geomorphic and vegetational structures which serve as semi-aquatic habitats for terrestrial beetle assemblages with appropriate species traits. Impoundment for navigation affects assemblages by modifying the severity of flooding disturbance. The effects of grazing pressure resemble flooding disturbance. The short-term (< 5yr) impact of bank regrading was explained by differences in severity, predictability and frequency compared to the beetles' generation length. Evenness and species richness were affected only by flooding and grazing disturbance. This response was not predicted by the intermediate disturbance hypothesis because the frequencies of flooding and grazing disturbances in the Soar valley are not appropriate to the hypothesis, which more closely relates to disturbance by bank regrading. In comparison to diversity indices, a rarity index was much less sensitive to environmental factors than species diversity indices and more robust against seasonal and yearly fluctuations. Consequently, it has more potential for use in site quality assessment.
14
Davidson, Lynette Nicole. "Diets of Ladybird Beetles (Coleoptera: coccinellidae) in Utah Alfalfa Fields." DigitalCommons@USU, 2008. https://digitalcommons.usu.edu/etd/139.
Full textAbstract:
Aphidophagous lady beetles rely on multiple sources of food in their environment. Alfalfa fields provide both aphids and many alternate foods, such as other arthropod prey, pollen, and fungi. Alfalfa fields (Medicago sativa L.) in Utah have low aphid densities, which may require lady beetles to consume alternative sources of food. Many methods can be used to determine these diets; frass analysis is used here to compare the diets of the introduced species Coccinella septempunctata L. with two native species, C. transversoguttata richardsoni Brown and Hippodamia convergens Guérin-Méneville, that occur in the Utah alfalfa habitat. In initial laboratory experiments to examine the feasibility of frass analysis, 48 hours at 20oC was sufficient time for adult lady beetles to pass prey cuticle through their guts. When consumed by these adults, pea aphids (Acyrthosiphon pisum [Harris]), alfalfa weevil larvae (Hypera postica [Gyllenhall]), and C. septempunctata larvae produced distinctive fragments in the frass. Such fragments could also be distinguished in frass collected in a field experiment in which aphid densities in plots of alfalfa were manipulated. Furthermore, additional consumed foods could be distinguished in the field experiment, including pollen, fungi, and other types of arthropods. Frass analysis demonstrated higher use of aphid prey by C. septempunctata adults collected from high versus low aphid density plots during the field experiment. Use of other types of prey, such as alfalfa weevil larvae, other arthropods, pollen and fungi, was similar between plots with high and low aphid densities. A field census was performed over two years to track the diets of the three species of lady beetles during the first crop of alfalfa, when two sources of prey in particular were present, aphids and alfalfa weevil larvae. Comparisons of diets revealed that the three species utilized different types of prey to similar degree during both years. In general, however, higher percentages of C. septempunctata adults were found to have consumed aphids and weevils during both years. Also, C. septempunctata was found to produce more frass and consume larger quantities of prey than either native species during the second year.
15
Trillo, Paula Alejandra. "Pre- and post-copulatory sexual selection in the tortoise beetle Acromis Sparsa (Coleoptera Chrysomelidae)." [Missoula, Mont.] : The University of Montana, 2008. http://etd.lib.umt.edu/theses/available/etd-03212009-144120/unrestricted/Trillo_umt_0136D_10003.pdf.
Full text
16
BURNE, JEFFREY CAMERON. "A MORPHOMETRIC ANALYSIS OF MORDELLISTENA IN THE SOUTHWESTERN UNITED STATES (COLEOPTERA: MORDELLIDAE)." Diss., The University of Arizona, 1985. http://hdl.handle.net/10150/188064.
Full textAbstract:
Beetles of the genus Mordellistena Costa are submitted to a morphometric analysis as a more feasible method of identification and as a foundation for the construction of a phylogeny. In the past, species groups were based on questionable morphological characters and a morphological analysis is an attempt, through numerical methods, to eliminate such doubts. Thirty external characters were chosen for measurement in a preliminary statistical analysis of four well defined species groups. These results were submitted to a discriminant analysis which reduced the number of significant characters to 14. Over 500 specimens were then measured for these characters and the results were then submitted to a cluster analysis. The results of the analysis illuminated several relationships among the genus. The analysis found 14 major groups (five or more members), 25 minor groups (4 or fewer members), and 102 odd specimens not assigned to any group. The major groups, two of the minor groups, and the 102 odd specimens are discussed in detail. The accomplishments of the study included an expansion of the list of species of Mordellistena for Arizona, the discovery of several previously undescribed species, a more confident method of identification, and the foundation of a phylogeny for the genus. Shortcomings of the study were the failure to construct species specific groups and failure to group 102 specimens. Both successes and failures of the study are discussed in detail and explanations are offered. The major successes of the study were the formation of a basis for a complete revision of the genus Mordellistena and the foundation of a phylogeny for the group.
17
Fadamiro, Henry Yemisi. "Flight behaviour and pheromone communication of the larger grain borer, Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae)." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296831.
Full text
18
Hawes, Catherine. "Factors influencing communities of ground beetles (Coleoptera: Carabidae) in plantation forests." Thesis, University of Sussex, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302256.
Full text
19
Greenwood, Matthew E. "Co-baiting for spruce beetles, Dendroctonus rufipennis, Kirby, and western balsam bark beetles, Dryocoetes confusus Swaine, Coleoptera, scolytidae." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ37539.pdf.
Full text
20
Victorsson, Jonas. "Community Assembly and Spatial Ecology of Saproxylic Coleoptera." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-88765.
Full text
21
Micheli, Charyn Juliana. "Studies on the longhorned woodboring beetles (Coleoptera: Cerambycidae) of the West Indies." College Park, Md. : University of Maryland, 2006. http://hdl.handle.net/1903/3735.
Full textAbstract:
Thesis (M.S.) -- University of Maryland, College Park, 2006.<br>Thesis research directed by: Dept. of Entomology. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
22
Kairu, Eunice Waitherero. "Community and population dynamics of dung beetles (Coleoptera: scarabaeinae) in Kenyan grassland." Thesis, University of East Anglia, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.254454.
Full text
23
Bates, Adam James. "The ecology and conservation of beetles (coleoptera) living on exposed riverine sediments." Thesis, University of Birmingham, 2006. http://etheses.bham.ac.uk//id/eprint/7175/.
Full textAbstract:
Situated at the very juncture of the aquatic and terrestrial, exposed riverine sediments (ERS) are poorly vegetated alluvial deposits of silts, sands and gravels, which are habitat for a wide range of rare and highly specialised beetles. The thesis aimed to assess: (1) the conservation value of ERS beetles; (2) their changing habitat requirements and spatial population structure over a range of spatio-temporal scales; and (3) their vulnerability to anthropogenic threats, in particular, trampling by livestock. A database of British occurrence records was used to assess the conservation value of ERS specialist beetles. Beetle sampling implemented quadrat hand searches and modified dry pitfall traps, and spatial distribution and population structure in relation to a suite of environmental variables was analysed using correlation, SADIE analysis, and mark recapture methods. ERS beetles were found to have considerable conservation importance and their spatial distribution was related to habitat characteristics at the within-patch, patch, reach, and stream segment scales. These distributions varied temporally in response to flow level and trampling intensity, and trampling intensity was shown to reduce the conservation value of beetle assemblages. The likely responses to a variety of threats, such as regulation and channelization, mediated by varying inter-patch spatial population structure were evaluated.
24
Beirne, Shana Margaret. "Distribution of Carrion Beetles (Coleoptera: Silphidae) in Different Geographic Regions of Virginia." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/19250.
Full textAbstract:
The distribution of beetles in the Family Silphidae has not been well studied in Virginia. The primary purpose of this study was to survey silphid beetles in a more systematic manner across different geographic regions of the state, with a special consideration for Nicrophorus species. The seasonal abundance and diversity of silphid beetles in Montgomery County, Virginia, was also examined. Baited pitfall traps were used to sample beetle distribution and abundance, and were placed in each of the five geographical regions of Virginia in the summers of 2007 and 2008. Traps were placed approximately one kilometer apart and were checked daily over a five day period for each of three sampling periods. A total of 4375 silphid beetles, consisting of 11 species in four genera, were collected in ten counties with beetles in the subfamily Silphinae being predominant. Within the Nicrophorinae, Nicrophorus tomentosus and N. orbicollis were dominant in 2007; whereas in the summer of 2008, N. tomentosus and N. pustulatus were the most commonly collected. Contingency analyses indicated that species abundance was associated with sampling period and geographic region. Nicrophorus americanus was not collected during either summer of surveying and only three N. carolinus were trapped in Suffolk County in the summer of 2008. For the Montgomery County survey, a total of 3276 beetles were found between the middle of April and the middle of October. The prevalent species within Nicrophorinae was Nicrophorus tomentosus and within the Silphinae it was Necrophila americana. Species abundance was associated with sampling period.<br>Master of Science in Life Sciences
25
Cook, Robert E. (Robert Edward) 1969. "Biology and Energetics of Tropisternus Lateralis Nimbatus (SAY) (Coleoptera: Hydrophilidae) in a Playa on the Southern High Plains of Texas and Aquatic Coleoptera Diversity from Seven Playas on the Southern High Plains of Texas." Thesis, University of North Texas, 1997. https://digital.library.unt.edu/ark:/67531/metadc277795/.
Full textAbstract:
A study of the biology of Tropisternus lateralis, a hydrophilid beetle, was conducted during the flood period of a single playa on the Southern High Plains of Texas from early June 1995 through early September 1995. Mechanism of colonization, tolerance/avoidance to drought, larval density, and secondary production were analyzed. T. lateralis colonized playas from surrounding aquatic habitats and avoided drought through aerial dispersion. Once in the playa, larval density increased over time. Secondary production was 1.31 g/m2/.25 yr. In addition, aquatic Coleoptera diversity was studied in seven playas on the Southern High Plains of Texas. A total of twenty three species were identified from the study region. Nine species not reported in playa literature were identified.
26
Francisco, Javier Sanchez Garcia. "Phylogeography, genomics and biosemiotics of bark beetles (Coleoptera: scolytinae) = Filogeografía, genómica y biosemiótica de escarabajos de corteza (Coleoptera: scolytinae)." Doctoral thesis, Universidad de Murcia, 2016. http://hdl.handle.net/10803/371739.
Full textAbstract:
Los escarabajos de corteza son insectos unidos a las plantas leñosas. Estos escarabajos están encuadrados dentro de los curculiónidos en la subfamilia Scolytinae. Esta subfamilia está compuesta solamente por insectos fitófagos. Su ciclo vita es crítico en los ciclos de materia y energia de los bosques templados. Además estos insectos pueden afectar a los intereses ecómicos en las zonas donde se producen fenómenos de plaga, las cuales pueden acabar afectando a miles de kilómetros cuadrados de bosque. El objetivo general de esta tesis es realizar una aproximación al estudio de los escarabajos de corteza desde diferentes perspectivas. Los aspectos estudiados han permitido identificar si existen patrones de nicho diferenciados en las poblaciones de Tomicus destruens de la cuenca mediterránea, analizar las diferencias en la expresión de microRNAs en T. yunnanensis y T. destruens, caracterizar posibles serina proteasas en T. yunnanensis y analizar las redes ecológicas en las que participan los escarabajos de corteza. En el capítulo uno utilizamos linajes jerárquicos obtenidos mediante análisis cladístico anidado (NCA) de los haplotipos de ADN mitocondrial (ADNmt) del escarabajo de corteza Tomicus destruens, para modelar la distribución por máxima entropía, usando variables ambientales y de hospedador a lo largo de toda la cuenca mediterránea. Los modelos ecológicos desarrollados indican que las linajes de ADN mitocondrial orientales minoritarios de T. destruens difieren en su nicho ecológico potencial de acuerdo a su relación con variables climáticas extremas. El objetivo del segundo capítulo es identificar y caracterizar in silico microRNAs de Tomicus yunnanensis y validar su expresión en T. yunnanensis y T. destruens, mediante el uso de herramientas bioinfomáticas y la utilización de métodos moleculares mediante stem-loop pcrs. Siete miRNAs fueron validados en ambas especies por PCR cuantitativa en tiempo real (RT-qPCR), de los cuales mir-2c-3p y mir-4944-5p mostraron expresión en ambas especies. La expresión de tyu-mir-2c-3p fue mayor en T. destruens que en T. yunnanensis, tanto en machos como en hembras. Sin embargo, se observó la máxima expresión de tyu-mir-4944-5p en las hembras de T. destruens, seguido por los machos de T. yunnanensis y T. destruens. En el tercer cápitulo el objetivo principal de este estudio fue analizar in silico el transcriptoma del escarabajo de corteza T. yunnanensis mediante herramientas bioinformáticas e identificar posibles genes candidatos para la síntesis de serina proteasas. Entre las serina proteasas identificadas, cuatro proteasas semejantes a tripsinas y cinco proteasas semejantes a quimotripsinas fueron anotadas in silico. Estas enzimas fueron clasificadas dentro de la familia SA1 y mostraba todas las características de serina proteasas digestivas. El objetivo del cuarto capítulo es identificar las señales del nicho semiótico que afectan a la comunicación intraespecífica de los escarabajos de corteza y también la comunicación con otros organismos, utilizando el concepto de “eco-field” junto con la Teoría General de Recursos (GTR) con el fin de detectar los procesos de ampliación del nicho semiótico en escarabajos de corteza a lo largo de la matriz del paisaje forestal. Una nueva perspectiva in la ecología del paisaje es la aplicación del concepto Eco-field junto con la Teoría General de Recursos. En este artículo, nosotros describimos la existencia de un eco-field en los escarabajos de corteza como una configuración espacial con una específica portadora de significado para cada interacción de cada organismo-recurso. En esta tesis se han abordado aspectos filogeográficos y genómicos de los escarabajos de corteza para entender mejor sus relaciones evolutivas y su ecología. Además se ha realizado una aproximación biosemiótica para analizar las implicaciones de la comunicación de los escolítidos en las redes ecológicas.<br>Bark beetles (Coleoptera: Curculionidae, Scolytinae) are insects linked to woody plants. This subfamily is exclusively composed of phytophagous species. In temperate forest ecosystems, their life cycle is critical in the matter and energy cycles of forests, but sometimes produce outbreaks episodes that come to disrupt the economic interests. The importance of these insects is that they are the first to arrive and complete their life cycle in susceptible hosts, facilitating the penetration of other wood-eating organisms like other insects (Hymenoptera and other Coleoptera) and especially fungi. Bark beetles affect mainly host trees with very little defence capability, either because they are weak by environmental conditions, injured or affected by fire. The overall objective of this thesis is to make an approach to the study of bark beetles from different perspectives. The study has allow to identify patterns of differentiated niche in populations of Tomicus destruens in the Mediterranean basin, to analyze differences in the expression of microRNAs in T. yunnanensis and T. destruens, to characterize possible serine proteases in T. yunnanensis and to analyze ecological networks where bark beetles participate. The objective of this chapter one was to identify some environmental factors of the ecological niche that affect the distribution of the mitochondrial lineages (mtLs) and the genetic diversity of T. destruens using nested clade analysis (NCA) together with the maximun entropy (MaxEnt) algorithm (NCA-MaxEnt).The ecological models developed indicate that minority eastern mtDNA lineages of T. destruens differ in their potential ecological niche according to their relation to extreme climatic variables. The main objective of the second chapter is to identify and characterize in silico microRNAs from Tomicus yunnanensis and to validate their expression in T. yunnanensis and T. destruens, using bioinformatics tools and molecular approaches with stem-loop pcrs.Seven miRNAs were validated in both species by quantitative real time PCR (RT-qPCR), of which mir-2c-3p and mir-4944-5p showed expression in both species. The expression of tyu-mir-2c-3p was higher in T. destruens than in T. yunnanensis, in both males and females. However, the highest expression of tyu-mir-4944-5p was observed in females of T. destruens, followed by males of T. yunnanensis and T. destruens. The main goal of the third chapter was to analyse in silico the transcriptome of the bark beetle T. yunnanensis by bioinformatic tools, and identify potential candidate genes for the synthesis of serine proteases. We intended to provide information on specific markers (digestion enzymes) to be used in future studies, aiming to develop new control strategies of this insect pest and its congeneric species.Among the serine proteases identified, four trypsin-like proteases and five chymotrypsin-like proteases were annotated in silico. These enzymes were classified into the SA1 family and showed all the characteristics of digestive serine proteases. The objective of this chapter was to identify the signals of the semiotic niche that affect intraspecific communication of bark beetles and with other organisms using the eco-field concept together with the General Theory of Resources (GTR) in order to detect processes of expansion of the semiotic niche in bark beetles along the entire landscape forestry matrix. A new perspective in landscape ecology is the application of the term Eco-Field together with the General Theory of Resources. In this paper, we describe the putative eco-field in bark beetles as a spatial configuration with a specific meaning-carrier for every organism-resource interaction. This thesis has addressed phylogeographic and genomic aspects of bark beetles to better understand their ecology and evolutionary relationships. In addition a biosemiotic approach was performed to analyse the implications of the communication of bark beetles in ecological networks.
27
Mynhardt, Glene. "Phylogeny and Evolution Of Myrmecophily In Beetles, Based On Morphological Evidence (Coleoptera: Ptinidae, Scarabaeidae)." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1338335162.
Full text
28
Botes, Antoinette. "Heterogeneity of dung beetle (Coleoptera: Scarabaeidae) assemblages in northern KwaZulu-Natal, South Africa: conservation implications." Diss., University of Pretoria, 2001. http://hdl.handle.net/2263/29639.
Full textAbstract:
Investigating the extent of local scale heterogeneity in assemblages is necessary to achieve a sound understanding of the processes giving rise to local assemblage patterns and the variation between them. Moreover, a clear understanding of local scale heterogeneity of assemblages is imperative in the development of effective regional conservation strategies. Previous studies examined the local scale heterogeneity in dung beetle assemblages between mixed woodland and sand forest habitats in Tembe Elephant Park, KwaZulu-Natal. Sand forest is an endangered habitat type in southern Africa which, when disturbed, opens up and changes towards mixed woodland. Reversion to the original sand forest structure after disturbance has never been recorded. Dung beetle assemblages were found to be homogenous within, but significantly heterogenous between, habitat types. It was therefore suggested that disturbance of sand forest (elephant foraging inside, and human occupation outside the Park) was likely to affect the assemblage structure of dung beetles in sand forest. Therefore, the aim of this study was to determine the effect of human- and elephant-induced disturbance on dung beetle assemblages in sand forest. Furthermore, disturbed sand forest dung beetle assemblages were predicted to be more similar to mixed woodland than to undisturbed sand forest assemblages. Disturbance by elephants causes sand forest vegetation structure to change to that of mixed woodland and this resulted in elephant-disturbed sand forest dung beetle assemblages becoming more similar to mixed woodland assemblages. Assemblages in human disturbed sand forest were unique and associated with human-related activities. The reliability and predictability of dung beetle indicator (species specific to a particular habitat type) and detector species (species indicative of the direction of habitat change) identified for Tembe in a previous study were tested. The results of this study largely supported the suite of bioindicator species first identified. Detector species were found to provide information complimentary to the indicator species and vegetation data available for sand forest. In addition, an identification key for the dung beetle species collected in Tembe Elephant Park to date was compiled. This key facilitates the use of dung beetle assemblages in indicator and monitoring systems in this reserve by providing a rapid and effective means of identifying the dung beetle species. The abundance-body size relationships of the dung beetle assemblages in mixed woodland, undisturbed and disturbed sand forests were also determined. Four hypotheses that account for the relationship between body size and abundance or its variants, were tested here, namely the energy equivalence rule, interspecific competition, differential extinction, and the biomass frequency distribution hypothesis. The disturbed sand forest assemblages were used to test whether disturbance alters the relationships between the macroecological variables (i.e. body size, abundance and biomass) and their interrelationships. This study provided some support for the biomass hypothesis. The major relationship between body size and abundance held despite human- and elephant-induced disturbance. Nonetheless, this study indicates that human- and elephant-induced disturbance alter sand forest dung beetle assemblages and may have significant implications for other taxa that occupy this endangered habitat type. Monitoring of the impacts of large herbivores on sand forest in reserves should thus be continued, and dung beetles provide one effective means by which this can be achieved.<br>Dissertation (MSc (Entomology))--University of Pretoria, 2006.<br>Zoology and Entomology<br>unrestricted
29
Alm, Steven Robert. "Monitoring and control of Conotrachelus nenuphar (Herbst) and Glischrochilus quadrisignatus (Say) : (Coleoptera--curculionidae, nitidulidae) /." The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487262825075913.
Full text
30
Benefer, Carly Marie. "The molecular and behavioural ecology of click beetles (Coleoptera: Elateridae) in agricultural land." Thesis, University of Plymouth, 2011. http://hdl.handle.net/10026.1/485.
Full textAbstract:
The larvae (wireworms) of some click beetle genera inhabit the soil in agricultural land and are crop pests. In the UK, a pest complex of Agriotes species, A. obscurus, A. sputator and A. lineatus, has been identified as the cause of the majority of damage. However, studies on their ecology are lacking, despite knowledge of this being important for the development of sustainable risk assessment and pest management strategies, in part due to the morphologically cryptic nature of wireworms. The ecology of economically important click beetle species was investigated, focusing on UK Agriotes species. The relationship between sex pheromone trapped male Agriotes adults and wireworms, identified using a molecular tool (T‐RFLP), was influenced by sampling method, and some environmental variables significantly correlated with species distributions. Scale of sampling influenced the observed distribution of wireworms and other soil insect larvae. Other wireworm species were trapped together with Agriotes species, but mitochondrial 16S rRNA sequences could not be matched to those of other UK species. Sequences from Canadian wireworm samples revealed possible cryptic species. Differences in adult movement rates were found in laboratory tests (A. lineatus > A. obscurus > A. sputator). Molecular markers (AFLPs) were developed to assess dispersal in adult male Agriotes but further protocol optimisation is required. The results show the importance of identifying wireworms to species for assessing adult and wireworm distributions, since the Agriotes pest complex may not be present or as 3 widespread as previously assumed. Sex pheromone trapping of adults may not be appropriate for risk assessment as the relationship between aboveground adult and belowground wireworm species distribution is not straightforward. The differences observed in Agriotes species’ ecology have implications for the implementation of pest management strategies. The techniques used here can be applied in future studies to provide information on other economically important click beetle species worldwide.
31
Lin, Ying-Chi. "Spatio-temporal dynamics of ground beetles (Coleoptera: Carabidae) in a mosaic forested landscape." Thesis, University of East Anglia, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.427087.
Full text
32
Small, Emma Clare. "The biodiversity and population of carbid beetles (coleoptera, carabidae) in fragmented urban habitats." Thesis, University of Birmingham, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289261.
Full text
33
Chénier, J. V. Robert. "Host selection by Monochamus scutellatus (Say) (Coleoptera: Cerambycidae) and other conifer-feeding beetles." Thesis, University of Ottawa (Canada), 1988. http://hdl.handle.net/10393/5054.
Full text
34
Koivula, Matti. "Carabid beetles (Coleoptera, Carabidae) in boreal managed forests : meso-scale ecological patterns in relation to modern forestry." Helsinki : University of Helsinki, 2001. http://ethesis.helsinki.fi/julkaisut/mat/ekolo/vk/koivula/.
Full text
35
Ferenca, Romas. "Kuršių nerijos nacionalinio parko vabalai (Coleoptera): sistema, fauna ir ekologija." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2005. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2005~D_20050607_165014-57378.
Full textAbstract:
The results of faunistical and ecological research on beetles (Coleoptera) of Curonian Spit were presented in this work. A species composition of different habitats: Baltic sea coastal area and the foredune ridge,wooded dunes, humid dune slacks, white and grey dunes and Curonian lagoons was established on the basis of research. The greatest species diversity was established in humid dune slacks (234 species), the lowest species diversity was established eudominant, dominant, subdominant and accessory species in the four Curonian Spit habitats: wooded dunes, humid dune slacks, grey dunes and littoral Curonian lagoons. The distribution and diversity of rare and protected insects species in Curonian Spit were established. There were found 10 species of beetles new for Lithuanian fauna:Elaphropus parvulus, Pterostichus ovoideus (Carabidae), Enochrus bicolor (Hydrophilidae), Lomechusa emarginata, Quedius infuscatus (Staphylinidae), Negastrius arenicola, Cardiophorus asellus (Elateridae), Obrium brunneum (Cerambycidae), Dicranthus elegans, Glocianus moelleri (Curculionidae). The beetles of 4 species: Cicindela maritima, Calosoma inquisitor (Carabidae), Polyphylla fullo (Scarabeidae), Stenagostus rufus (Elateridae)wee included in Red Data book of Lithuania and the beetles of 11 species - in List of Key forest habitats species.
36
Baum, Michael [Verfasser], and Susanne [Akademischer Betreuer] Dobler. "Transmembrane carriers of cardenolide-adapted leaf beetles (Coleoptera, Chrysomelidae) / Michael Baum. Betreuer: Susanne Dobler." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2016. http://d-nb.info/1095766562/34.
Full text
37
Huber, Dezene P. W. "Responses of five species of coniferophagous bark beetles (Coleoptera: Scolytidae) to angiosperm bark volatiles." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ61650.pdf.
Full text
38
Gbaye, Olajire Ayodele. "The effects of environmental conditions on tolerance to malathion in bruchid beetles (Coleoptera: Bruchidae)." Thesis, University of Reading, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.553011.
Full textAbstract:
Bruchid beetles are economically important pests of grain legumes. Their medium to high level infestation is being controlled with insecticide. This study investigated the effects of environmental factors such as temperature, toxicant concentration, food and bruchid geographical strain on malathion tolerance in Callosobruchus species (c. maculatus, C. chinensis and C. rhodesianus). There were variations in insecticide tolerance among the species and C. maculatus which is the most widely spread and known showed the highest tolerance. Geographical origin had a pronounced impact on the response of C. maculatus to malathion. There was a positive relationship between temperature effect and bruchid susceptibility to malathion as often observed with organophosphate. The impact of food on insecticide tolerance in Callosobruchus was quite unpredictable. Overall, the interactive effects of all the factors are very complex. An alteration of anyone factor could either enhance or reduce tolerance. This could be driven by bruchid ancestry or fitness cost. Biochemical pathway study with malaoxon (malathion metabolite) ruled out acetylcholinesterase (AChE) as primarily responsible for malathion tolerance in bruchids; though it could be an additional factor to other tolerance mechanisms. However, there was variation in AChE activity among the species and strains with influence from the rearing food. Preliminary screening of the bruchids for the endosymbiont Wolbachia, prior to studies on its effect on insecticide tolerance was undertaken. The study revealed a high probable presence of this organism in C. maculatus and C. rhodesianus, which were previously thought to be non-host species. The implication of these findings in order to optimize bruchid management especially with insecticides to avoid/combat the development of insecticide resistance is discussed. This includes the impacts on legume breeding, production, transportation and storage.
39
Baum, Michael Verfasser], and Susanne [Akademischer Betreuer] [Dobler. "Transmembrane carriers of cardenolide-adapted leaf beetles (Coleoptera, Chrysomelidae) / Michael Baum. Betreuer: Susanne Dobler." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2016. http://nbn-resolving.de/urn:nbn:de:gbv:18-78297.
Full text
40
Moore, Wendy. "Molecular Phylogenetics, Systematics, and Natural History of the Flanged Bombardier Beetles (Coleoptera: Adephaga: Carabidae: Paussinae)." Diss., The University of Arizona, 2006. http://hdl.handle.net/10150/194110.
Full textAbstract:
This dissertation focuses on the systematics of the Paussinae, a lineage of approximately 775 beetle species all of which produce explosive defensive chemicals and many which are obligate associates of ants (myrmecophiles). This dissertation includes six discrete studies, which taken together span the spectrum of systematic research. It includes taxonomic projects on both larval and adult paussines. It also includes phylogenetic investigations, based on DNA sequence data and morphological data, that address the evolutionary relationships among the major lineages within Paussinae as well as the evolutionary position of the Paussinae within the beetle suborder Adephaga. The inferred trees are used to study character evolution of physiological and behavioral traits of these organisms in a phylogenetic framework. This work sets the stage for a lifetime of work on this fascinating group.
41
Arnaudin, Mary Elin. "Benefits of Dung Beetles (Coleoptera: Scarabaeidae) on Nutrient Cycling and Forage Growth in Alpaca Pastures." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/31419.
Full textAbstract:
Alpacas have been gaining prominence in the U.S. since the early 1980s. In pastures, dung beetle activity has been shown to enhance the degradation and incorporation of dung into the soil. The benefits of this activity have been quantified for cattle, but not for alpacas. The objectives of this study were to document the dung beetle species present in alpaca pastures, and to evaluate the impact of dung beetle activity on the growth of a common summer annual grass. In 2010 and 2011, dung beetle species present in alpaca pastures located at Virginia State University (VSU), were evaluated weekly from late May until late August. Eleven species of dung beetles were found, with Onthophagus taurus Schreber being the most dominant. In 2011, a greenhouse study was conducted at Virginia Techâ s Southern Piedmont Research Station. Treatments included a control (no dung, no beetles), dung only, dung with five pairs of O. taurus, and dung that was allowed to be colonized in alpaca pastures at VSU. The addition of O. taurus and the field colonization both significantly increased total yield over the no dung control by 10% and 14%, respectively. These results indicate that healthy and diverse dung beetle communities occur in alpaca pastures in the mid-Atlantic region, and that the presence of these beetles would likely enhance nutrient cycling and pasture growth. However, it is important to remember that dung beetles are just one component of many found in a healthy grassland ecosystem, and the functions of these components are interrelated.<br>Master of Science
42
Chung, Arthur Y. C. "The diversity of Coleoptera assemblages in different habitat types in Sabah, Malaysia, with special reference to herbivory." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299010.
Full text
43
Young, Anna Gilg. "The isolation and characterization of geranyl diphosphate synthase from the pine engraver, Ips pini (Coleoptera: Scolytidae) /." abstract and full text PDF (UNR users only), 2004. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3164670.
Full text
44
Ferenca, Romas. "Beetle (Insecta,Coleoptera) fauna and its distribution in seashore habitats of Lithuania." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20141006_102905-19458.
Full textAbstract:
Typical habitats of Baltic seashore habitats are characterized by infertile saline sands and predominant western winds. The current Baltic sea coast habitats are the result of human activities. This landscape is one of the youngest and the same time one of the most sensitive. The beetles of Baltic seashore habitats have been investigated only fragmentarly, and there is no research data about the Baltic Sea costal beetle complexes. The aim of this study is to investigate the beetle fauna and distribution in different habitats of Baltic seashore of Lithuania.<br>Baltijos pajūriui būdingi nederlingi ir druskingi smėlio dirvožemiai, dominuojantys vakarų vėjai.Dabartinės Baltijos pajūrio buveinės, tai aktyvios žmonių veiklos rezultatas, ir tuo pačių vienas jauniausių ir labiausiai pažeidžiamų Lietuvos kraštovaizdžių. Baltijos pajūrio vabzdžiai buvo tyrinėjami tik fragmentiškai, Iki šiol nebuvo atlikti Baltijos pakrančių buveinių vabalų kompleksų tyrimai. Šio darbo tikslas - ištirti Baltijos pajūrio buveinių vabalų fauną ir paplitimą buveinėse.
45
Carrington, Terry R. "Factors influencing habitat selection and activity of ground beetles (Coleoptera: Carabidae) in central Appalachia Part I : The influence of soil and soil surface characteristics on habitat selection by Carabidae ; Part II : Precipitation and temperature fluctuations : effects on Carabidae activity ; Part III : The effects of two microbial insecticides for gypsy moth control on Carabidae populations /." Morgantown, W. Va. : [West Virginia University Libraries], 2002. http://etd.wvu.edu/templates/showETD.cfm?recnum=2368.
Full textAbstract:
Thesis (M.S.)--West Virginia University, 2002.<br>Title from document title page. Document formatted into pages; contains viii, 114 p. : ill., maps. Vita. Includes abstract. Includes bibliographical references.
46
Chiu-Alvarado, María Pilar. "Host location by parasitoids of the Coffee Berry Borer, Hypothenemus hampei (Ferrari) (Coleoptera: Curculiondae: Scolitynae)." Thesis, University of Oxford, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.670033.
Full text
47
Yates, Megan. "Dung beetles eat plants : insights into the nutritional world of Euoniticellus intermedius (Reiche) (Coleoptera: Scarabaeinae)." Bachelor's thesis, University of Cape Town, 2007. http://hdl.handle.net/11427/25597.
Full textAbstract:
Dung beetle eggs develop within the finite nutritional environment of the brood ball, which is made using maternally processed animal faeces. It is thought that microbial and gut-derived excretions constitute the major source of N and C for adult dung beetles, while developing larvae, which have retained the mouthparts of their saprophagous ancestors, digest larger particles in the brood ball and rely on symbionts present in the brood ball to provide breakdown products for their nutrition. Stable isotope analysis was used to trace the source of developing larval N and C. Nitrogen and carbon contents, as well as C: N ratios, were used to assess the nutritional quality of this finite food source and to track the changes in these values during the course of development. The main source of both larval and adult N and C was plant-derived and preferential assimilation of gut-derived excretions present in the dung did not occur. Symbionts, including fungi, did not appear to play a significant role in larval nutrition. Extensive amino acid recycling occurs during metamorphosis, indicated by the 0.53 %0 enrichment in 815N in emergent beetles. Maternal processing of bulk dung creates an enhanced nutritional environment for offspring and the maternal faecal deposit, on which the egg is positioned, provides the larvae with an initial, nutrient-rich source of food.
48
Atmore, John David. "Phylogenetic relationships among beetles within the genus Onymacris (Coleoptera : Tenebrionidae) : a phenetic versus cladistic approach." Master's thesis, University of Cape Town, 1986. http://hdl.handle.net/11427/21179.
Full textAbstract:
Bibliography: pages 67-72.<br>Phylogenetic relationships among species within the beetle genus Onymacris (Coleoptera Tenebrionidae) are identified using phenetic and cladistic approaches. Phylogenetic results from cladistic analyses proved to be more robust than those derived with phenetic approaches. However, phenetic analyses proved to be useful in identifying possible interspecific hybridization. Two monophyletic subgenera are recognized. The subgenus Melanonymacris comprises O. lobicollis, O. rugatipennis, O. paiva, O. boschimana, O. multistriata, O. hottentota and O. plana, all of Which have black elytra. The subgenus Onymacris comprises O. langi, O. marginipennis, O. brainei, O. candidipennis and O. bicolor, all of which have pale-coloured elytra, and two species with black, 'bullet-shaped' elytra, O. laeviceps and O. unguicularis. The resulting cladogram and the characters and synapomorphies underpinning it are compared with those from an independently conducted study (Penrith 1984). The implications of the cladogram are discussed in the lignt of the tenets of vicariance biogeography and the constraints of adaptation to the extreme desert environment.
49
Johansson, Helena. "Comparison of saproxylic beetle assemblages on four different broad-leaved tree species in south-eastern Sweden." Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-71681.
Full textAbstract:
Old hollow trees have declined in Europe and many saproxylic (wood-dwelling) beetles dependent on them are threatened. Several studies have been done on old hollow oaks and they have been shown to harbour a species-rich saproxylic beetle fauna. However, other broad-leaved trees might also be important to consider as supporting habitats. The aim of this study was to investigate to what extent saproxylic beetles are tree genus specialists. Pitfall traps and window traps were used to compare the saproxylic beetle fauna in oak, ash, norway maple and small-leaved lime in an area dominated by old oaks. 5,501 specimens of saproxylic beetles were found, belonging to 239 species of which 27 species were red-listed. There were significant differences in the saproxylic species composition between the four tree species, but with large overlaps. The saproxylic species found in oak overlapped to 66 % with norway maple, to 67 % with ash and to 70 % with small-leaved lime. About one third of the species in this study seem to be tree genus specialists. The conclusion is that other broad-leaved trees are important to consider in models as supporting habitats for oaks. However, to be able to save the whole fauna of saproxylic beetles, trees of all different tree species are needed.
50
Villastrigo, Carbajo Adrián. "Macroevolutionary patterns of habitat transitions in aquatic Coleoptera." Doctoral thesis, Universitat de Barcelona, 2019. http://hdl.handle.net/10803/668249.
Full textAbstract:
Understanding the evolutionary processes underlying extant biodiversity may help us to comprehend why species richness is not equally distributed between clades. One of the main causes to explain the disparity of species richness is the development of key innovations in particular clades, increasing or decreasing their capabilities to occupy new environments, to exploit novel resources or to cope with competition. The present thesis focuses on explaining the macroevolutionary consequences of two of the most common habitat transitions in aquatic environments: between environments with different degree of salinity, and between running and standing waters. Among inhabitants of aquatic environments aquatic Coleoptera are one of the most diverse, with representatives living in all kind of environments, including both running and standing waters and, not infrequently, saline environments. The most speciose aquatic Coleoptera families living in aquatic habitats are Hydrophilidae, Dytiscidae and Hydraenidae, but only the evolution of the ecological transitions of the former have been previously studied under a phylogenetic perspective. In this thesis, we assessed the evolutionary patterns of selected tribes belonging to the other two families. Despite aquatic Coleoptera being a relatively well-studied fauna, we needed to address several systematic modifications that revealed the true evolutionary history of the studied groups, describing a genus and three subgenera of Hygrotini, plus other modifications of both Hygrotini and Ochthebiini taxonomy (Chapters 1 and 3), setting the basis of this thesis.
Transitions between environments with different degree of saline waters was addressed for Hygrotini (Dytiscidae family, Chapter 2) and Ochthebiini (Hydraenidae family, Chapter 5). We detected multiple origins of tolerance to saline waters, with a gradual acquisition in almost all cases and only direct transitions to hypersaline waters in fairly isolated clades, mostly associated with coastal rockpools. Moreover, tolerance to hypersaline waters was found to be irreversible, but it did not follow an evolutionary dead-end pattern as lineages exhibiting this trait still maintain their diversification capabilities (as seen in Cobalius subgenus, Chapter 5). Additionally, our results seem to link the origin of lineages exhibiting tolerance to saline waters to periods of global aridification, in accordance with previous studies in Hydrophilidae. Transitions between running and standing waters were studied in Hydroporini (Dytiscidae family, Chapter 6). We unveiled that species living in lotic and lentic habitats display similar diversification patterns, but the habitat preference is affecting the body size of the species, with reduced body sizes in specialized environments (i.e. smaller species in running waters). Finally, the field sampling in saline habitats led to the discovery of a new species for science, described as Ochthebius (Micragasma) minoicus (Chapter 4).<br>Estudiar los procesos evolutivos que ocasionan la biodiversidad actual puede ayudarnos a comprender mejor como la riqueza de especies está distribuida de forma desigual en diferentes clados. Una de las causas principales para explicar este fenómeno es el desarrollo de innovaciones clave que modifican las capacidades de las especies para sobrevivir en nuevos ambientes, acceder a nuevos recursos, o para lidiar la competencia con otras especies. Esta tesis se focaliza en explicar las consecuencias macroevolutivas de dos de las transiciones de hábitat más comunes en ecosistemas acuáticos: aquellas entre ecosistemas con diferente nivel de salinidad, y aquellas entre ecosistemas de aguas corrientes y aguas estancas. Entre los habitantes de ambientes acuáticos, los escarabajos son uno de los grupos más diversos, con especies capaces de vivir en todo tipo de ambientes, incluyendo aguas corrientes y estancas, y en ocasiones, ambientes salinos. Las familias más diversas de escarabajos acuáticos son Hydrophilidae, Dytiscidae e Hydraenidae, aunque solo la primera ha sido estudiada desde una perspectiva evolutiva. En esta tesis, evaluamos los patrones evolutivos de varias tribus pertenecientes a las otras 2 familias.
A pesar de que los escarabajos acuáticos son un grupo bien estudiado en general, ha sido necesario realizar modificaciones en la clasificación de algunos grupos para reflejar su verdadera historia evolutiva, describiendo un nuevo género y tres subgéneros para la tribu Hygrotini. Adicionalmente, se han realizado pequeñas modificaciones tanto en Hygrotini como en Ochthebiini, siendo la base sobre la que se han desarrollado los posteriores estudios filogenéticos de esta tesis.
Las transiciones entre ambientes con diferente nivel de salinidad han sido estudiadas para Hygrotini (familia Dytiscidae, Capítulo 2) y Ochthebiini (familia Hydraenidae, Capítulo 5). Se han detectado múltiples orígenes de la tolerancia a la salinidad, adquiriéndose esta característica de forma gradual en la mayoría de los casos. Los casos en los que se han descubierto transiciones directas de ambientes de agua dulce hacia ambientes hipersalinos, son clados aislados en la filogenia y asociados con ambientes de charcas costeros. Además, la tolerancia de aguas hipersalinas ha demostrado ser una característica irreversible, aunque no por ello se trata de un dead-end evolutivo (callejón sin salida), ya que las especies que viven en estos ambientes conservan su capacidad de diversificación, llegando incluso a ser superior a la de otras especies (por ejemplo, el subgénero Cobalius, Capítulo 5). A si mismo, nuestros resultados relacionan el origen de linajes tolerantes a la salinidad con periodos de aridificación a escala global, un patrón que confirma el encontrado en la familia Hydrophilidae.
En cuanto a las transiciones entre aguas corrientes y estancas estudiada en Hydroporini (familia Dytiscidae, Capítulo 6), hemos encontrado patrones similares en las especies que viven en ambos ambientes, aunque los análisis sugieren la posibilidad de una mayor tasa de diversificación en ambientes de aguas estancadas. Nuestros resultados han destacado una correlación entre la preferencia del hábitat de las especies con su tamaño corporal, de manera que las especies que se encuentran en ambientes más especializados (en aguas corrientes) son aquellas con menor tamaño. Adicionalmente, se ha demostrado que la transición entre ambientes no es per se un factor que afecta al tamaño corporal de las tesis.
Finalmente, gracias a los numerosos trabajos de campo realizados enfocados en los ambientes salinos, se ha podido describir la especie Ochthebius (Micragasma) minoicus (Capítulo 4).