Abstract：
:In vertebrates, reproductive output often increases with age. Unlike older birds, first-year photoperiodic birds lack experience with the reproductively stimulatory effects of long day lengths (photostimulation). We examined whether age-related differences in annual reproductive development could be partially attributed to previous experience with photostimulation in the photoperiodic house finch (Carpodacus mexicanus). By manipulating photoperiod, we generated 2 groups of first-year females: a photo-experienced group that underwent 1 photoperiodically induced cycle of gonadal development and regression and a photo-naïve group exposed to long days since hatch. We transferred both groups from long to short days and then photostimulated and exposed them to male birdsong prior to sacrifice. Following concurrent photostimulation, both groups exhibited similar plasma luteinizing hormone surges and hypothalamic vasoactive intestinal polypeptide immunoreactivity. In contrast, hypothalamic gonadotropin-releasing hormone immunoreactivity and circulating vitellogenin levels were higher in photo-experienced birds, and yolk deposition occurred in only 2 females, both of which were photo-experienced. Our results demonstrate that photo-experience enhances some aspects of early photo-induced reproductive development and raise the hypothesis that photo-experience may account for at least some age-related variation in reproductive output.
journal_name
J Biol Rhythmsjournal_title
Journal of biological rhythmsauthors
Salvante KG,Dawson A,Aldredge RA,Sharp PJ,Sockman KWdoi
10.1177/0748730412468087subject
Has Abstractpub_date
2013-02-01 00:00:00pages
38-50issue
1eissn
0748-7304issn
1552-4531pii
28/1/38journal_volume
28pub_type
杂志文章abstract：:The daily biological clock regulates the timing of sleep and physiological processes that are of fundamental importance to human health, performance, and well-being. Environmental parameters of relevance to biological clocks include (1) daily fluctuations in light intensity and temperature, and (2) seasonal changes in...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/0748730408320284
更新日期：2008-08-01 00:00:00
abstract：:The mammalian circadian pacemaker is located in the suprachiasmatic nucleus (SCN). Various inputs modulate pacemaker phase, including the serotonergic (5HTergic) input from the midbrain raphe. 5HT phase-advances the SCN pacemaker when applied during mid subjective day. In vitro studies indicate that 5HT advances the m...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/074873002129002429
更新日期：2002-04-01 00:00:00
abstract：:The SCN has long had organizational schemas imposed on it. In most, the SCN is dichotomized, with one region typically associated with the presence of vasopressin cells and the other associated with cells containing vasoactive intestinal polypeptide and certain afferent terminal fields. If assumed to be accurate, the ...
journal_title：Journal of biological rhythms
pub_type： 杂志文章,评审
doi：10.1177/0748730406296749
更新日期：2007-02-01 00:00:00
abstract：:In Drosophila melanogaster, disruption of night by even short light exposures results in degradation of the clock protein TIMELESS (TIM), leading to shifts in the fly molecular and behavioral rhythms. Several lines of evidence indicate that light entrainment of the brain clock involves the blue-light photoreceptor cry...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/074873040101600303
更新日期：2001-06-01 00:00:00
abstract：:Since the advent of techniques to investigate gene expression on a large scale, numerous circadian rhythms in mRNA amount have been reported. These rhythms generally differ in amplitude and phase. The authors investigated how far a parameter not regulated by the circadian clock can influence the phase of a rhythm in R...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/0748730408325753
更新日期：2008-12-01 00:00:00
abstract：:From the mathematical study of simple models for circadian rhythm, the authors identified a clear effect of saturation in the enzyme kinetics on the promotion or suppression of a sustained oscillation. In the models, a clock gene (per gene) is transcribed to produce mRNAs, which are translated to produce proteins in t...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/0748730402238239
更新日期：2002-12-01 00:00:00
abstract：:Odors elicit a number of behavioral responses, including attraction and repulsion in Drosophila. In this study, the authors used a T-maze apparatus to show that wild-type Drosophila melanogaster exhibit a robust circadian rhythm in the olfactory attractive and repulsive responses. These responses were lower during the...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/0748730405274451
更新日期：2005-06-01 00:00:00
abstract：:Systematic treatment of hamsters with triazolam (TRZ) or novel wheel (NW) access will yield PRCs similar to those for neuropeptide Y. Both TRZ and NW access require an intact intergeniculate leaflet (IGL) to modulate circadian rhythm phase. It is commonly suggested that both stimulus types influence rhythm phase respo...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/074873098129000327
更新日期：1998-12-01 00:00:00
abstract：:Temperature compensation of circadian rhythms in neuronal firing rate was investigated in the suprachiasmatic nucleus (SCN) of ground squirrels and rats in vitro. A reduction in SCN temperature from 37 to 25 degrees C reduced peak firing rates by > 70% in rats but only by approximately 21% in squirrels; trough firing ...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/074873049601100205
更新日期：1996-06-01 00:00:00
abstract：:Perhaps the most observable of the many circadian oscillations that have been described in both vertebrate and invertebrate animals is the daily alterations in periods of rest and activity. Recent studies in the fruit fly Drosophila melanogaster suggest that these periods of inactivity are not simply rest but share ma...
journal_title：Journal of biological rhythms
pub_type： 杂志文章,评审
doi：10.1177/0748730402239672
更新日期：2003-02-01 00:00:00
abstract：:Aging alters numerous aspects of circadian biology, including the amplitude of rhythms generated by the suprachiasmatic nuclei (SCN) of the hypothalamus, the site of the central circadian pacemaker in mammals, and the response of the pacemaker to environmental stimuli such as light. Although previous studies have desc...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/0748730403251802
更新日期：2003-04-01 00:00:00
abstract：:Activity patterns are the product of interactions between an internal circadian clock and direct responses to photic and nonphotic features of the environment that are said to "mask" the influence of that clock. Evolutionary transitions between nocturnality and diurnality involve changes in mechanisms underlying both ...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/0748730409351672
更新日期：2010-02-01 00:00:00
abstract：:Photoreception in the mammalian retina is not restricted to rods and cones but extends to a small number of intrinsically photosensitive retinal ganglion cells expressing the photopigment melanopsin. These mRGCs are especially important contributors to circadian entrainment, the pupil light reflex, and other so-called...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/0748730411409719
更新日期：2011-08-01 00:00:00
abstract：:To assess binocular interactions and possible ocular dominance in entrainment of circadian rhythms, Syrian hamsters maintained in LL were subjected for several weeks to schedules of eye occlusion with opaque contact lenses. In separate groups, the opaque lens was inserted into the left or right eye for 12 h at the sam...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/0748730404272967
更新日期：2005-02-01 00:00:00
abstract：:Austrovenus stutchburyi is an intertidal, burrowing, filter-feeding bivalve. It exhibits a strong, approximately tidal pattern in the time of gaping of its valves when in constant laboratory conditions. Individuals that have been held in laboratory conditions long enough to lose their overt gaping pattern will respond...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/074873049701200208
更新日期：1997-04-01 00:00:00
abstract：:Rats anticipate a fixed daily feeding time by entrainment of a component of their multioscillatory circadian system. The range of stimuli capable of entraining this component is little studied. Previous studies suggest that restricted water access is not an effective entrainment stimulus, as measured by general locomo...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/074873049200700206
更新日期：1992-07-01 00:00:00
abstract：:Numerous studies have demonstrated sleep-promoting effects of melatonin treatment in humans, as evidenced by subjects' self-reports, polysomnographic recordings, and continuous actigraphic registration of motor activity. The sleep-promoting effects of either physiological or pharmacological doses of melatonin typicall...
journal_title：Journal of biological rhythms
pub_type： 杂志文章,评审
doi：10.1177/074873049701200620
更新日期：1997-12-01 00:00:00
abstract：:Endogenous circadian rhythms are involved in various photoperiodic responses of birds. Investigations involving the mechanisms of photoperiodic time measurement in birds have been confined mainly to temperate zone species using males exclusively. Due to the paucity of experimental evidence on subtropical birds that ha...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/074873049501000405
更新日期：1995-12-01 00:00:00
abstract：:The annual cycle of reproductive function in starlings (Sturnus vulgaris) is driven by seasonal changes in daylength and consists of a 6-month period of photosensitivity, culminating in maximal gonadal development, followed by a 6-month period of photorefractoriness. If male starlings are held under a constant photope...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/074873049300800204
更新日期：1993-07-01 00:00:00
abstract：:Although pineal "synaptic" ribbons (SR) are frequently examined by means of quantitative electron microscopy, their functional significance remains unclear. The same is true for related structures--"synaptic" spherules (SPH). In the course of such studies, it has been noted that SR counts may differ from laboratory to...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/074873048800300103
更新日期：1988-04-01 00:00:00
abstract：:An understanding of the retinal mechanisms in mammalian photoentrainment will greatly facilitate optimization of the wavelength, intensity, and duration of phototherapeutic treatments designed to phase shift endogenous biological rhythms. A small population of widely dispersed retinal ganglion cells projecting to the ...
journal_title：Journal of biological rhythms
pub_type： 杂志文章,评审
doi：10.1177/0748730403018003005
更新日期：2003-06-01 00:00:00
abstract：:Subjective well-being largely depends on mood, which shows circadian rhythmicity and can be linked to rhythms in many physiological circadian markers, such as melatonin and cortisol. In healthy young volunteers mood is influenced by an interaction of circadian phase and the duration of time awake. The authors analyzed...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/0748730409335546
更新日期：2009-06-01 00:00:00
abstract：:To date, it is largely unknown which light settings define the optimum to steer alertness and cognitive control during regular daytime working hours. In the current article, we used a multimeasure approach combined with a relatively large sample size ( N = 60) and a large range of intensity levels (20-2000 lux at eye ...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/0748730418796438
更新日期：2018-12-01 00:00:00
abstract：:Photic signals affect circadian activity rhythms by both phasic and tonic mechanisms that modulate pacemaker phase and period. In mammals, the effects of light on circadian activity are mediated by the retina, which communicates with the suprahiasmatic nucleus (SCN) by two different anatomical routes: the retino-hypot...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/074873048700200104
更新日期：1987-04-01 00:00:00
abstract：:Daylight saving time (DST) is a source of circadian disruption impinging on millions of people every year. Our aim was to assess modifications, if any, in the number, type, and outcome of Accident & Emergency (A&E) visits/return visits over the DST months. The study included 366,527 visits and 84,380 return visits to ...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/0748730418791097
更新日期：2018-10-01 00:00:00
abstract：:Mice with targeted gene disruption have provided important information about the molecular mechanisms of circadian clock function. A full understanding of the roles of circadian-relevant genes requires manipulation of their expression in a tissue-specific manner, ideally including manipulation with high efficiency wit...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/0748730418757006
更新日期：2018-04-01 00:00:00
abstract：:Previous research has demonstrated a clear link between late chronotype and depression. The vulnerability factors underpinning this link, however, are unclear. Here the relationship between two specific emotion regulation strategies, cognitive reappraisal and expressive suppression, and chronotype was investigated usi...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/0748730417709111
更新日期：2017-08-01 00:00:00
abstract：:Hibernating animals have been a successful model system for elucidating fundamental properties of many physiological systems. Over the past 50 years, a diverse literature has emerged on the role of the circadian system in control and expression of winter torpor in several orders of birds and mammals. This body of rese...
journal_title：Journal of biological rhythms
pub_type： 杂志文章,评审
doi：10.1177/0748730403254971
更新日期：2003-08-01 00:00:00
abstract：:The circadian rhythm of eclosion activity and its pacemaker were analyzed in a series of latitudinal races of Drosophila auraria ranging from 34.2 degrees to 42.9 degrees N in Japan. The phase of the rhythm (psi EL) to the daily photoperiod (PP) changes as daylength is increased, and the slope of psi EL (PP) changes w...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：
更新日期：1989-07-01 00:00:00
abstract：:Crustaceans have frequently been used to study the neuroethology of both agonistic behavior and circadian rhythms, but whether their highly stereotyped and quantifiable agonistic activity is controlled by circadian pacemakers has, so far, not been investigated. Isolated marbled crayfish (Procambarus spec.) displayed r...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/0748730408328933
更新日期：2009-02-01 00:00:00
