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Relevant bibliographies by topics / Seasonal rhythm / Dissertations / Theses

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Dissertations / Theses on the topic 'Seasonal rhythm'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Crain, Shae. "Age and Seasonal Change in the Chronobiology of a Spider with an Exceptionally Long-Period Circadian Clock." Digital Commons @ East Tennessee State University, 2019. https://dc.etsu.edu/etd/3673.

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This study examines locomotor activity in samples of Frontinella pyramitela collected over its active season (April-October) to investigate whether seasonality and/or age may help explain the exceptional variability typically found in spider clock systems. Despite its noteworthy variability (%CV= 7.7), we have found that Frontinella has a mean free-running period of 28.4±2.18 hours that does not significantly vary over time. There is no correlation between day length and free-running period, indicating that varying length of FRP is not a function of photoperiod length. In LD 12:12 h, the windo

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2

Johansson, Carolina. "Genetic and experimental studies of seasonal affective disorder and related phenotypes /." Stockholm, 2003. http://diss.kib.ki.se/2003/91-7349-481-X/.

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3

Ho, Kwo Wei David. "The genetic basis of seasonal affective disorder." Diss., University of Iowa, 2015. https://ir.uiowa.edu/etd/5505.

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Family and twin studies have shown a heritable component to seasonal affective disorder (SAD). While a few studies have examined individual genetic variants in SAD, many methodological issues exist in the current literature. First, most studies combined major depression (MDD) and bipolar (BD) cases in the genetic analysis of SAD. This makes it difficult to differentiate the effect from MDD and BD. Second, most studies adopted a candidate gene approach and used fairly small sample sizes. This does not allow for testing across a wide variety of genes, and it yields less robust P-values. Third, h

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4

Roecklein, Kathryn Ariel. "Melanopsin polymorphisms in seasonal affective disorder /." Download the thesis in PDF, 2005. http://www.lrc.usuhs.mil/dissertations/pdf/Roecklein2005.pdf.

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5

Johnson, Leigh G. "Atypical and typical winter depressive symptoms and responsiveness to light therapy, cognitive-behavioral therapy, or combination treatment /." Download the thesis in PDF, 2005. http://www.lrc.usuhs.mil/dissertations/pdf/Johnson2005.pdf.

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6

Kushniryk, O. V. "Impact of seasons on circadian rhythm." Thesis, БДМУ, 2020. http://dspace.bsmu.edu.ua:8080/xmlui/handle/123456789/18035.

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7

Crain, Shae, Thomas Jones, and Darrell 2346742 Moore. "Average Free-Running Period in Spider (Frontinella communis) Peaks and Desynchronizes Throughout its Active Season." Digital Commons @ East Tennessee State University, 2019. https://dc.etsu.edu/asrf/2019/schedule/5.

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An organism’s circadian clock exists as a self-regulating oscillator that can synchronize with its surroundings. This manifests as physiological and behavioral output which can anticipate changes in environment. These rhythms may even persist internally and are known to oscillate at a period (tau) of around 24 hours even in the absence of external cues. In the laboratory, such rhythmic output is known as a free-running period (FRP). Given that circadian rhythms are distributed in a number of taxa as well as their tendency to oscillate along with the solar day, it has been suggested that they r

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8

Cannistraci, Carlo Vittorio, Tuomo Nieminen, Masahiro Nishi, et al. ""Summer Shift": A Potential Effect of Sunshine on the Time Onset of ST‐Elevation Acute Myocardial Infarction." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-235086.

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Background: ST-elevation acute myocardial infarction (STEMI) represents one of the leading causes of death. The time of STEMI onset has a circadian rhythm with a peak during diurnal hours, and the occurrence of STEMI follows a seasonal pattern with a salient peak of cases in the winter months and a marked reduction of cases in the summer months. Scholars investigated the reason behind the winter peak, suggesting that environmental and climatic factors concur in STEMI pathogenesis, but no studies have investigated whether the circadian rhythm is modified with the seasonal pattern, in particular

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9

Rough, Jennifer Nicole. "An integrative chronobiological-cognitive approach to seasonal affective disorder." ScholarWorks @ UVM, 2016. http://scholarworks.uvm.edu/graddis/483.

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ABSTRACT Seasonal affective disorder (SAD) is characterized by annual recurrence of clinical depression in the fall and winter months. The importance of SAD as a public health problem is underscored by its high prevalence (an estimated 5%) and by the large amount of time individuals with SAD are impaired (on average, 5 months each year). The specific cause of SAD remains unknown; however, researchers have identified possible chronobiological and psychological vulnerabilities to SAD. The study aimed to clarify psychological and chronobiological correlates of SAD in the first test of an integrat

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10

Henningsen, Jo Beldring. "Rôle du RFRP dans le contrôle central de la reproduction saisonnière en fonction du sexe et de la photopériode." Thesis, Strasbourg, 2016. http://www.theses.fr/2016STRAJ020/document.

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Le RFRP est une neuropeptide impliqué dans la régulation de l’axe reproducteur, mais ses effets varient en fonction du sexe et des espèces. Le but de cette étude était de décrire en détails l’organisation du système RFRP et de caractériser son rôle dans le contrôle circadien et saisonnier de l’axe reproducteur de hamsters femelles. Les résultats montrent que le système RFRP est régulé par la photopériode et que son niveau d’expression est plus élevé chez les femelles que chez les mâles. Cela se traduit par des actions spécifiques sur l’axe gonadotrope femelle. En effet, L’activité des neurones

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11

Lucas, Ashley Rae. "Neurobiology of Seasonal Life-history Transitions." PDXScholar, 2015. https://pdxscholar.library.pdx.edu/open_access_etds/2511.

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Many animals exhibit seasonal changes in life-history stages, and these seasonal transitions are often accompanied by dramatic switches in behavior. While the neuroendocrine mechanisms that regulate such behavioral transitions are poorly understood, arginine vasotocin (AVT) and neuropeptide Y (NPY) are excellent candidates because they regulate reproductive and feeding behavior, respectively. In this study, I asked if seasonal changes in AVT and/or NPY are concomitant with spring migration away from the breeding grounds, as male and female red-sided garter snakes (Thamnophis sirtalis parietali

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12

Caylor, Danielle. "InHabit: Physiology and Architecture in Time." University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1367927909.

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13

Popovych, V. B. "Seasonal dynamics of biological rhythms of microbiota of the large intestine cavity content of intact white rats." Thesis, БДМУ, 2020. http://dspace.bsmu.edu.ua:8080/xmlui/handle/123456789/18192.

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14

Howard, Christina Marie. "Seasonal and Sex Differences in the Effects of Melatonin on Brain Arginine Vasotocin in Green Treefrogs (Hyla cinerea): Relationship to Melatonin Receptor 1a." PDXScholar, 2014. https://pdxscholar.library.pdx.edu/open_access_etds/1871.

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Critical life history events such as breeding, migration and hibernation must take place in the correct environmental context to minimize deleterious consequences on survival and reproductive fitness. Neuroendocrine mechanisms synchronizing internal physiological states with extrinsic environmental cues are vital to timing life history events appropriately. Secretion of the pineal hormone melatonin is sensitive to light and temperature cues, which provides a physiological indicator of time of day and time of year for organisms. Melatonin influences seasonal reproduction in a variety of vertebr

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15

Brand?o, Paula Rocha de Melo. "Caracteriza??o do ritmo de atividade motora durante a puberdade em sag?is (Callithrix jacchus) sob condi??es semi-naturais." Universidade Federal do Rio Grande do Norte, 2008. http://repositorio.ufrn.br:8080/jspui/handle/123456789/17259.

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Made available in DSpace on 2014-12-17T15:36:52Z (GMT). No. of bitstreams: 1 PaulaRMB.pdf: 735531 bytes, checksum: 6f97353cd0f92f620d3561920b75a484 (MD5) Previous issue date: 2008-06-05<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior<br>Most of ontogenetic studies on circadian timing system have been developed on infants, adults and elderly. The puberty has not been a stage of life few studied, except for researches in human adolescents, that presents phase delay in sleep-wake cycle. However, few studies have focused on the basis of this circadian change due to methodo

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16

Itzhacki, Jacobo. "Reward effects of light." Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAJ083/document.

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Pour élucider les effets récompensants de la lumière, deux approches expérimentales ont été adoptées. Une étude chez le rongeur diurne Arvicanthis ansorgei indique que le raccourcissement de la longueur du jour avec la diminution de l'intensité lumineuse induit des changements du rythme de l’activité locomotrice, de la quantité de dopamine dans le système de la récompense et sur l'expression du gène Per2 dans le noyau suprachiasmatique. Ces altérations ont été améliorées par l'exposition journalière à des créneaux d’une heure de lumière à la fin du jour. Dans une étude humaine, le bien-être su

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17

Parker, Marine. "Ethologie et rythmes biologiques du chat." Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAJ126/document.

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Les rythmes biologiques aident les organismes vivants à programmer la plupart des processus comportementaux dans la fenêtre temporelle la plus appropriée. Les données de la littérature sur la rythmicité du chat domestique sont rares et conflictuelles. Pour approfondir nos connaissances sur le sujet, nous avons utilisé de récentes technologies de télémétrie pour enregistrer et caractériser les rythmes journaliers d'activité locomotrice et de prises alimentaire chez des chats en fonction des saisons et des conditions d’hébergement. Les rythmes des chats étaient modifiés par la photopériode et la

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18

Chen, Wenfeng. "Adaptation of the Drosophila circadian clock to seasonal changes in temperature and photoperiod." 2007. http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.15797.

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19

SCHLEICHEROVÁ, Monika. "Biologické rytmy živočichů-rozšiřující učivo biologie na gymnáziích." Master's thesis, 2009. http://www.nusl.cz/ntk/nusl-51149.

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The main objective of the diploma thesis was to create a project of a tutorial on the subject of animal and human biorhythms. The tutorial is intentioned as an additional biology curriculum at grammar schools. Analysis of teaching biorhythms in secondary Biology schoolbooks used in the Czech Republic preceded a composition of this tutorial. Processing literary research based on reading Czech and foreign-language literature was another theoretical resource. The tutorial is divided into three parts {--} {\clqq}Animal Biorhythms``, {\clqq}Human Biorhythms`` and {\clqq}Seasonal Animal Biorhythms``

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20

Helfer, Gisela, and T. J. Stevenson. "Pleiotropic Effects of Proopiomelanocortin and VGF Nerve Growth Factor Inducible Neuropeptides for the Long-Term Regulation of Energy Balance." 2020. http://hdl.handle.net/10454/17864.

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yes<br>Seasonal rhythms in energy balance are well documented across temperate and equatorial zones animals. The long-term regulated changes in seasonal physiology consists of a rheostatic system that is essential to successful time annual cycles in reproduction, hibernation, torpor, and migration. Most animals use the annual change in photoperiod as a reliable and robust environmental cue to entrain endogenous (i.e. circannual) rhythms. Research over the past few decades has predominantly examined the role of first order neuroendocrine peptides for the rheostatic changes in energy balance. Th

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21

McLean, Samantha L., Haesung Yun, Andrew Tedder, and Gisela Helfer. "The effect of photoperiod and high fat diet on the cognitive response in photoperiod-sensitive F344 rats." 2021. http://hdl.handle.net/10454/18550.

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no<br>In many species, seasonal changes in day length (photoperiod) have profound effects on physiology and behavior. In humans, these include cognitive function and mood. Here we investigated the effect of photoperiod and high fat diets on cognitive deficits, as measured by novel object recognition, in the photoperiod-sensitive F344 rat, which exhibits marked natural changes in growth, body weight and food intake in response to photoperiod. 32 male juvenile F344 rats were housed in either long or short photoperiod and fed either a high fat or nutrient-matched chow diet. Rats were tested in th

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22

Ellis, David John. "Seasonal regulation of the circadian rhythms of behavioural temperature selection and locomotor activity in Australian sleepy lizards (Tiliqua rugosa, gray; reptilia: scincidae)." Thesis, 2010. http://hdl.handle.net/2440/60035.

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This research project examined the role of environmental time cues and circadian rhythms in mediating seasonal adjustments in the body temperature and locomotoractivity patterns in the Australian sleepy lizard, Tiliqua rugosa (Gray 1827). The first component of this study investigated whether daily rhythms of behavioural thermoregulation and locomotor activity that T. rugosa displays in the field are endogenous circadian rhythms. In each season, there was significant variation in each of these rhythms in lizards released on laboratory thermal gradients under prevailing light-dark (LD) cycles.

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23

Ellis, David John. "Seasonal regulation of the circadian rhythms of behavioural temperature selection and locomotor activity in Australian sleepy lizards (Tiliqua rugosa, gray; reptilia: scincidae)." 2010. http://hdl.handle.net/2440/60035.

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This research project examined the role of environmental time cues and circadian rhythms in mediating seasonal adjustments in the body temperature and locomotoractivity patterns in the Australian sleepy lizard, Tiliqua rugosa (Gray 1827). The first component of this study investigated whether daily rhythms of behavioural thermoregulation and locomotor activity that T. rugosa displays in the field are endogenous circadian rhythms. In each season, there was significant variation in each of these rhythms in lizards released on laboratory thermal gradients under prevailing light-dark (LD) cycles.

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24

Costello, Mary K. "Combined Treatment With Npy Y5 Antagonists and Nan-190 Attenuates Transients in Light-induced Phase Shifts and Potentiates Phase Shifts Only During the Late Subjective Night." 2008. https://scholarworks.umass.edu/theses/169.

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Circadian rhythms in physiology and behavior are synchronized by a central pacemaker, the suprachiasmatic nuclei (SCN) of the hypothalamus. Shift work, jet lag and sleep disorders can disrupt circadian rhythms, negatively impacting health and well-being. The SCN pacemaker resets rapidly in response to changes in the daily light cycle, however, adjustment of peripheral oscillators to changing time zones or work shifts is more gradual, leading to internal desynchrony. In addition, many diseases can impair the SCN’s ability to adjust to changes in the light cycle. My research investigated whethe

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