Abstract：
:The synchronizing stimulus, its transduction site, and the afferent pathways responsible for feeding entrainment remain unknown. In fish, the role of the diet in the development of feeding anticipatory activity (FAA) is not well understood and fundamental questions on the mechanisms of feeding entrainment, such as the meal characteristics required to develop FAA, remain unexplored. To test the entraining properties of daily meals with different sizes and energy densities, activity rhythms were studied after a 12-h shift of the feeding cycle in individual goldfish under constant light. In the 1st experiment, the energy content of a control diet (16.7 kJ/g) was diluted by replacing 50% (8.3 kJ/g) or 90% (1.7 kJ/g) of the diet with cellulose. However, the number of days required to stabilize FAA after the shift did not differ statistically between diets. In the 2nd experiment, meal size was modified by reducing the daily feeding ration to 0.5% and 0.1% b.wt.d(-1). In this case, differences in the entraining properties of the two feeding rations appeared because goldfish fed at 0.1% b.wt.d(-1) resynchronized faster than those fed at 0.5% b.wt.d(-1). These results revealed that the dilution of the dietary energy up to 1.7 kJ/g had no significant effect on the entraining properties of the feeding-entrainable oscillator (FEO), whereas the reduction of the meal size to 0.1% b.wt.d(-1) provoked a faster resynchronization after shifting the daily meal cycle. Taken together, these results suggest that gut distension may be involved in feeding entrainment, as a reduction in meal size but not in the amount of dietary energy supplied significantly shortened the time required for resynchronization and highlighted the different synchronizing properties of meal size and energy density as zeitgebers for the FEO.
journal_name
J Biol Rhythmsjournal_title
Journal of biological rhythmsauthors
Sánchez-Vázquez FJ,Aranda A,Madrid JAdoi
10.1177/074873040101600107subject
Has Abstractpub_date
2001-02-01 00:00:00pages
58-65issue
1eissn
0748-7304issn
1552-4531journal_volume
16pub_type
杂志文章abstract：:The tau mutation in Syrian hamsters (Mesocricetus auratus) is phenotypically expressed in a period of the circadian rhythm of about 20 h in homozygotes (SS) and about 22 h in heterozygotes (S+). The authors investigate whether this well-defined model for variation in circadian period exhibits associated changes in ene...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/074873049701200503
更新日期：1997-10-01 00:00:00
abstract：:Honey bee (Apis mellifera) workers emerge from the pupae with no circadian rhythms in behavior or brain clock gene expression but show strong rhythms later in life. This postembryonic development of circadian rhythms is reminiscent of that of infants of humans and other primates but contrasts with most insects, which ...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/0748730412440851
更新日期：2012-06-01 00:00:00
abstract：:Individuals of the shore crab Carcinus maenas were exposed to artificial cycles, applied in tidal antiphase, of pairs of the three major environmental variables that entrain circatidal rhythmicity in this species: salinity, temperature, and hydrostatic pressure. During entrainment, the observed locomotor activity patt...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/074873049000500405
更新日期：1990-01-01 00:00:00
abstract：:How the cellular elements of the SCN are synchronized to each other is not well understood. We explore circadian oscillations manifest at the level of the cell, the tissue, and the whole animal to better understand intra-SCN synchrony and master clock function of the nucleus. At each level of analysis, responses to va...
journal_title：Journal of biological rhythms
pub_type： 杂志文章,评审
doi：10.1177/0748730409344800
更新日期：2009-10-01 00:00:00
abstract：:Ground squirrels, Spermophilus tridecemlineatus, were kept in a 12:12 h light-dark cycle. As expected for a diurnal species, their locomotor activity occurred almost entirely in the daytime. Expression of mPer1 and mPer2 in the suprachiasmatic nucleus was studied at six time points by in situ hybridization. For both t...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/074873001129002141
更新日期：2001-10-01 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
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journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/0748730419900877
更新日期：2020-04-01 00:00:00
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journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/0748730415582127
更新日期：2015-06-01 00:00:00
abstract：:During the first 7 weeks of postnatal life, short day lengths inhibit the onset of puberty in many photoperiodic rodents, but not in Syrian hamsters. In this species, timing of puberty and fecundity are independent of the early postnatal photoperiod. Gestational day length affects postnatal reproductive development in...
journal_title：Journal of biological rhythms
pub_type： 杂志文章
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更新日期：2008-10-01 00:00:00
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journal_title：Journal of biological rhythms
pub_type： 杂志文章
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更新日期：2002-04-01 00:00:00
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journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/0748730407306198
更新日期：2007-10-01 00:00:00
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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
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journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/074873049501000104
更新日期：1995-03-01 00:00:00
abstract：:A recent report that popliteal illumination shifted the circadian rhythms of body temperature and melatonin challenged the longstanding belief that light phase-shifting the circadian system in mammals is mediated only through the retina. The authors tested effects of popliteal illumination and illumination provided th...
journal_title：Journal of biological rhythms
pub_type： 临床试验,杂志文章
doi：10.1177/074873040001500307
更新日期：2000-06-01 00:00:00
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journal_title：Journal of biological rhythms
pub_type： 杂志文章
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更新日期：2011-08-01 00:00:00
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journal_title：Journal of biological rhythms
pub_type： 杂志文章,评审
doi：10.1177/0748730405277388
更新日期：2005-08-01 00:00:00
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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
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journal_title：Journal of biological rhythms
pub_type： 杂志文章
doi：10.1177/0748730405280195
更新日期：2005-10-01 00:00:00
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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
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更新日期：2006-12-01 00:00:00
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journal_title：Journal of biological rhythms
pub_type： 杂志文章
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更新日期：2018-10-01 00:00:00
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journal_title：Journal of biological rhythms
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doi：
更新日期：1993-01-01 00:00:00
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journal_title：Journal of biological rhythms
pub_type： 杂志文章
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更新日期：2009-02-01 00:00:00
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journal_title：Journal of biological rhythms
pub_type： 杂志文章
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更新日期：2006-02-01 00:00:00
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journal_title：Journal of biological rhythms
pub_type： 杂志文章
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更新日期：2016-04-01 00:00:00
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pub_type： 杂志文章
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更新日期：2009-06-01 00:00:00
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journal_title：Journal of biological rhythms
pub_type： 杂志文章
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更新日期：2006-06-01 00:00:00
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pub_type： 杂志文章,评审
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更新日期：2007-06-01 00:00:00
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pub_type： 杂志文章
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更新日期：1994-01-01 00:00:00
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journal_title：Journal of biological rhythms
pub_type： 杂志文章
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更新日期：1989-04-01 00:00:00
