Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 35 for “"crepuscular"”.
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Cronobiología del sueño de movimientos oculares rápidos en Octodon degus
… presenta un perfil predominantemente crepuscular en su ritmo de actividad-reposo. Se ha descrito la existencia de múltiples cronotipos en esta especie, con individuos que expresan diversas predilecciones horarias de actividad: nocturna, diurna e intermedia. Interesa estudiar aspectos …
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A study of the fine structure and the function of the ocellus of the adult cabbage looper (Trichoplusia ni, Hübner) (lepidoptera: noctuidae)
… role in determining the light intensity at which crepuscular flight is initiated. This hypothesis was tested in the following manner. Laboratory reared moths were divided into five groups each with a different or no treatment. These were: 1. Compound eyes and ocelli occluded. 2. Compound eyes …
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Micromechanical actuators for insect flight mechanics
… actuators that can stimulate the antennae of the crepuscular hawk moth Manduca Sexta. The possible mechanosensory function of antennae as airflow sensors has been suggested, and recent discoveries of our collaborators reveal that mechanosensory input from the antennae of flying moths serves a …
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Using activity budgets and space use preferences to define enclosure appropriateness for African painted dogs, Lycaon pictus (Temminck 1820)
… the African painted dogs in these zoos show the crepuscular activity of their wild counterparts. I also looked at “stereotypic” behaviours and whether they were more significant at specific times of day. Because of the crepuscular activity, complex social structure, and nomadic nature of painted …
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Distribuição longitudinal, dieta alimentar e ciclo reprodutivo de Pimelodella lateristriga (Osteichthyes, Siluroidei) no rio Ubatiba, Maricá, Rio de Janeiro
… feeding activity rhythm has been stablished from crepuscular to nocturnal, with occasional peaks all day over. This analysis defines trophically Pimelodella lateristriga as an carnivorous and benthophagous species. Maturation scales, based on macroscopic and microscopic morphological …
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A 1-mW vibration energy harvesting system for moth flight-control applications
… system for moth flight control applications. The crepuscular hawk moth Manduca sexta is the chosen test subject. This project is part of the Hybrid Insect MEMS (HI-MEMS) program. The objective of the program is to establish an interface between adult insect neural systems, wireless communication …
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Anthropogenic effects on site use and temporal patterns of terrestrial mammals in Harenna Forest, Ethiopia
… bushbucks (Tragelaphus scriptus meneliki) were crepuscular, and the remaining species ranged from diurnal to cathemeral. Neither similar body size nor similar diet affected overlap between species pairs. However, overlap with human temporal activity was low for Menelik bushbucks (Δ=0.45) and …
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Movements and bioenergetics of canvasbacks wintering in the upper Chesapeake Bay
… at night, making regular and often lengthy crepuscular movements (x = 11.7 km) from near shore habitats during the day to off shore habitats at night. Movement patterns were similar for birds using habitats on the eastern and western shores of the Bay. Canvasbacks had extensive home ranges …
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Foraging Ecology and Demography of Sternotherus Odoratus in a Southwestern Missouri Population
Sternotherus odoratus is a chiefly crepuscular turtle that inhabits a variety of soft-bottom aquatic ecosystems from stream and rivers to lakes, ponds, and ditches. Previous studies have examined its diet, but few have addressed other aspects of its feeding ecology. The objectives of this study …
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Effect of population density on diel activity and growth in stream-dwelling Arctic charr Salvelinus alpinus
… resulting in increased activity specifically at crepuscular times of day. Fluctuations in water temperature, light intensity, and water depth affected the probability of activity at both high and low density, which suggests that an interplay of ecological factors shape diel activity patterns. …
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Investigation of the SCN 2.2 Cell Line as a Model of the Central Mammalian Circadian Pacemaker
… as well as components of daytime, nighttime and crepuscular circadian regulatory pathways. The line also expresses several antigens that are highly expressed and/or relatively restricted within the hypothalamus to the SCN. Stable SCN 2.2 reporter cell lines were prepared that expressed luciferase …
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Comparing density analyses and carnivore ecology in Madagascar's southeastern rainforest
… activity overlap (5.8-88.8%). C. ferox preferred crepuscular activity, but overall exhibited a cathemeral activity pattern.
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Spring Migration Ecology of American Woodcock (Scolopax minor) in the Central Management Region of the United States
… <p>I used citizen scientists to conduct crepuscular surveys for woodcock (n=860) in Arkansas, Missouri, Iowa, and Illinois and used survey areas to describe woodcock habitat with large-scale LANDFIRE vegetation data layers. Survey areas where woodcock were detected had less agriculture …
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Caretaking Trans-states
… painting I reclaim trans kinship with mangroves, crepuscular time and keening, sharing how painting can be used to generate trans choreographies on and off the paintings surface. I consider the potential of embodied transing to work against what Carl Mika (2017) calls the colonial imperative of …
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Vertical activity, host preference, and population studies of adult Culicoides (Diptera: Ceratopogonidae)
… were given for 8 more. Most species were crepuscular in their activities, with the greatest activity usually occurring in the evenings. Some species were nearly as active in the mornings as in the evenings, and one species, C. guttipennis, was most active during the nights and in the …
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The vomeronasal organ of the skink, Scincella lateralis: the morphology and role in predation
… that are secretive, fossorial, nocturnal or crepuscular have a tendency to have relatively well developed vomeronasal organs as measured by the thickness of the vomeronasal sensory epithelium, and lizards that are diurnal, visually oriented, and aboreal generally have smaller, less developed …
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Bioenergetic and ecological consequences of diet variability in Atlantic croaker Micropogonias undulatus
… fish such as croaker, but appears to be a crepuscular feeding habit that has not been previously detected. Thus, I investigated the bioenergetic consequences of secondary piscivory to the distribution of croaker, to the condition of individuals within the population and to the ecosystem. …
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Factors influencing pyrethroid barrier spray effectiveness against Aedes mosquitoes
… control, as these methods are directed towards crepuscular species. Barrier spray applications, however, have been shown to achieve a significant reduction in local mosquito pressure while requiring less insecticide application. The design behind barrier sprays is to apply insecticide treatments …
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Ritmos biológicos na emergência de Cercárias de Shistosoma mansoni Sambon, 1907 (Platyhelminthes: Digenea) em infecções mono e plurimiracidianas de Biomphalaria glabrata (Say, 1818) (Mollusca: Gastropoda)
… This pattern is possibly associated to some crepuscular or nocturnal activities of the vertebrate hosts or even to some infection procedures in the laboratory. Future studies concerning the investigation of this temporal pattern in S. mansoni stra ins just isolated from the field should be …
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Breeding Biology Of Chuck-Will's-Widows: Incubation, Brooding, And Provisioning Behavior And Characteristics Of Nest Sites
… (N = 104). Nightjars are visually oriented crepuscular and nocturnal insectivores so eggs are likely left unattended at dusk and dawn so adults can forage. Off-bouts were shorter in duration during the middle (days 10 - 15) and late (days 16-21) stages of incubation than early in incubation …
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