Arid
DOI10.3109/07420528.2013.805337
Activity Rhythms and Masking Response in the Diurnal Fat Sand Rat Under Laboratory Conditions
Barak, Orly; Kronfeld-Schor, Noga
通讯作者Kronfeld-Schor, Noga
来源期刊CHRONOBIOLOGY INTERNATIONAL
ISSN0742-0528
EISSN1525-6073
出版年2013
卷号30期号:9页码:1123-1134
英文摘要

Daily rhythms are heavily influenced by light in two major ways. One is through photic entrainment of a circadian clock, and the other is through a more direct process, referred to as masking. Whereas entraining effects of photic stimuli are quite similar in nocturnal and diurnal species, masking is very different. Laboratory conditions differ greatly from what is experienced by individuals in their natural habitat, and several studies have shown that activity patterns can greatly differ between laboratory environment and natural condition. This is especially prevalent in diurnal rodents. We studied the daily rhythms and masking response in the fat sand rat (Psammomys obesus), a diurnal desert rodent, and activity rhythms of Tristram’s jird (Meriones tristrami), a nocturnal member of the same subfamily (Gerbillinae). We found that most sand rats kept on a 12 h:12 h light-dark (LD) cycles at two light intensities (500 and 1000 lux) have a nocturnal phase preferences of general activity and higher body temperature during the dark phase. In most individuals, activity was not as stable that of the nocturnal Tritram’s jirds, which showed a clear and stable nocturnal activity pattern under the same conditions. Sand rats responded to a 6-h phase advance and 6-h phase delay as expected, and, under constant conditions, all tested animals free ran. In contrast with the nocturnal phase preference, fat sand rats did not show a masking response to light pulses during the dark phase or to a dark pulse during the light phase. They did, however, have a significant preference to the light phase under a 3.5 h:3.5 h LD schedule. Currently, we could not identify the underlying mechanisms responsible for the temporal niche switch in this species. However, our results provide us with a valuable tool for further studies of the circadian system of diurnal species, and will hopefully lead us to understanding diurnality, its mechanisms, causes, and consequences.


英文关键词Activity pattern circadian rhythms diurnality meriones tristrami psammomys obesus
类型Article
语种英语
国家Israel
收录类别SCI-E
WOS记录号WOS:000324890200006
WOS关键词CIRCADIAN ACTIVITY RHYTHMS ; ANXIETY-LIKE BEHAVIORS ; UNSTRIPED NILE RAT ; PSAMMOMYS-OBESUS ; ACTIVITY PATTERNS ; BODY-TEMPERATURE ; SHORT DAYLIGHT ; ANIMAL-MODELS ; SPINY MOUSE ; LIGHT
WOS类目Biology ; Physiology
WOS研究方向Life Sciences & Biomedicine - Other Topics ; Physiology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/176423
作者单位Tel Aviv Univ, Dept Zool, IL-69978 Tel Aviv, Israel
推荐引用方式
GB/T 7714
Barak, Orly,Kronfeld-Schor, Noga. Activity Rhythms and Masking Response in the Diurnal Fat Sand Rat Under Laboratory Conditions[J],2013,30(9):1123-1134.
APA Barak, Orly,&Kronfeld-Schor, Noga.(2013).Activity Rhythms and Masking Response in the Diurnal Fat Sand Rat Under Laboratory Conditions.CHRONOBIOLOGY INTERNATIONAL,30(9),1123-1134.
MLA Barak, Orly,et al."Activity Rhythms and Masking Response in the Diurnal Fat Sand Rat Under Laboratory Conditions".CHRONOBIOLOGY INTERNATIONAL 30.9(2013):1123-1134.
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