Behavioral Responses of Hens to Simulated Dawn and Dusk Periods
نویسندگان
چکیده
منابع مشابه
Floral responses to photoperiod are correlated with the timing of rhythmic expression relative to dawn and dusk in Arabidopsis.
Daylength, or photoperiod, is perceived as a seasonal signal for the control of flowering of many plants. The measurement of daylength is thought to be mediated through the interaction of phototransduction pathways with a circadian rhythm, so that flowering is induced (in long-day plants) or repressed (in short-day plants) when light coincides with a sensitive phase of the circadian cycle. To t...
متن کاملDawn and dusk simulation as a therapeutic intervention.
Daily alternations of light and darkness entrain circadian rhythms of body tem~rature, rest-activity, and melatonin and other neuroendocrine secretions (cf., Moore-Ede et al. 1982). Annual cycles of changing light-dark patterns underlie seasonal metabolic and behavioral cycles and, in humans living distant from the equator, a syndrome of winter depression with prominent atypical neurovegetative...
متن کاملMagnetic field of the transition current system: dawn-dusk asymmetry
In this paper we consider the interactions of coronal mass ejections (CMEs) with the Earth’s magnetosphere for the specific case in which there is a sharp increase in the dynamic pressure (interplanetary shock) that is associated with a simultaneous northward turning of the interplanetary magnetic field (IMF) from the near horizontal direction. Previously, we have shown that under such circumst...
متن کاملDusk to dawn activity patterns of anopheline mosquitoes in West Timor and Java, Indonesia.
Malaria is a serious health issue in Indonesia. We investigated the dusk to dawn anopheline mosquito activity patterns, host-seeking and resting locations in coastal plain, hilly and highland areas in West Timor and Java. Adult mosquitoes were captured landing on humans or resting in houses or animal barns. Data analyzed were: mosquito night-time activities; period of peak activity; night-time ...
متن کاملDawn and dusk of internal medicine: a view of a qualified oncologist and hematologist.
1040 An internal medicine specialist! When I received my diploma from the Rector of the Medical Acade‐ my of Warsaw, Professor Jan Nielubowicz, I knew that achieving this professional status had been a dream of mine and many of my colleagues. For years the internal medicine specialist has been a symbol of the highest level of medical profession as he could treat all diseases which affect the in...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Poultry Science
سال: 1991
ISSN: 0032-5791
DOI: 10.3382/ps.0700483