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DNA甲基化调控动物季节性行为和繁殖的研究进展 被引量:2
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作者 李晓雨 刘秋月 +4 位作者 胡文萍 王翔宇 曹晓涵 狄冉 储明星 《家畜生态学报》 北大核心 2016年第12期1-5,12,共6页
动物的生物学行为会随生存环境、季节变换发生一些显著的改变,这些行为变化在动物生存、生长发育、繁殖甚至疾病中扮演着重要角色。近年来研究指出,DNA甲基化参与了动物季节性行为及繁殖性能的调控。本文概述了DNA甲基化常见的发生区域... 动物的生物学行为会随生存环境、季节变换发生一些显著的改变,这些行为变化在动物生存、生长发育、繁殖甚至疾病中扮演着重要角色。近年来研究指出,DNA甲基化参与了动物季节性行为及繁殖性能的调控。本文概述了DNA甲基化常见的发生区域,动物季节性行为变化及动物繁殖性能(初情期、季节性发情、性腺发育等)受DNA甲基化调控的研究进展,为从表观遗传角度分析动物季节性行为变化和动物繁殖的分子机制提供理论参考和研究思路。 展开更多
关键词 DNA甲基化 季节性行为 繁殖 表观调控
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重庆高校大学生冬季季节性行为模式问卷调查研究 被引量:1
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作者 阳佩良 杨春宇 +1 位作者 汪统岳 王燕尼 《灯与照明》 2019年第1期29-32,共4页
重庆作为中国第V类光气候区的典型城市,冬季日照缺乏直接影响大学生在校期间生理心理健康。对重庆地区在校大学生进行抑郁自评量表(SDS)和季节行为模式(SPAQ)问卷调查,结果显示,冬季日照缺乏会降低学生的学习效率,产生抑郁情绪,尤其是... 重庆作为中国第V类光气候区的典型城市,冬季日照缺乏直接影响大学生在校期间生理心理健康。对重庆地区在校大学生进行抑郁自评量表(SDS)和季节行为模式(SPAQ)问卷调查,结果显示,冬季日照缺乏会降低学生的学习效率,产生抑郁情绪,尤其是来自日照丰富地区的学生,冬季行为特征产生明显变化。 展开更多
关键词 光气候区 季节性行为 主观评价 问卷分析
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Seasonal variation and synchronization of sexual behaviors in free-ranging male Tibetan macaques (Macaca thibetana) at Huangshan, China 被引量:3
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作者 夏东坡 李进华 +3 位作者 朱勇 孙丙华 Lori K SHEERAN Megan D MATHESON 《Zoological Research》 CAS CSCD 北大核心 2010年第5期509-515,共7页
Although seasonal breeding has been documented in many non-human primates, it is not clear whether sexual behaviors show seasonal variation among male individuals. To test this hypothesis, the focal animal sampling me... Although seasonal breeding has been documented in many non-human primates, it is not clear whether sexual behaviors show seasonal variation among male individuals. To test this hypothesis, the focal animal sampling method and continuous recording were used to investigate seasonal variation and synchronization of sexual behaviors in five male Tibetan macaques (Macaca thibetana) at Mt. Huangshan from Oct 2005 to Sept 2006. Both copulatory and sexually motivated behaviors (i.e., sexual chase, grimace, and sexual-inspection), which were significantly higher in the mating season than non-mating season. Furthermore, seasonal variations of sexual behaviors, including copulatory and sexually motivated behaviors, were synchronized among males. The results shed light on sexual competition and tactics for reproductive success of male M. thibetana and other non-human primates with seasonal breeding. 展开更多
关键词 Tibetan macaques (Macaca thibetana) Males Sexual behavior Seasonal variation Synchrony
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An Assessment of the Within-Year Seasonality in the Loan Loss Provisioning Behavior of European Banks
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作者 Enrico Laghi Michele Di Marcantonio Maria Teresa Bianchi 《Journal of Modern Accounting and Auditing》 2014年第12期1167-1186,共20页
This study aims at assessing whether a significant within-year seasonality exists in the loan loss provisioning behavior of European listed banks observed in the period from 2004 to 2013. Since the accuracy of auditin... This study aims at assessing whether a significant within-year seasonality exists in the loan loss provisioning behavior of European listed banks observed in the period from 2004 to 2013. Since the accuracy of auditing processes and the level of disclosure requirements in financial reports differ among quarters, during the year, banks may have a leeway to underestimate and postpone the complete provisioning of loan losses in the less regulated and less audited quarters. We hypothesize that those differences are relevant factors which determine non-lower or significantly higher average levels of loan loss provisions in the half-yearly and especially in the annual financial reports than in the interim management statements disclosed in the first and the third quarters of the year. We also investigate the impact of the recent financial crisis and develop a special analysis for the ltalian banks' case. The empirical results support our hypotheses, suggesting that, in some cases, a convergence among quarterly levels of auditing processes and disclosure requirements may be needed. Our work contributes to the existing literature by providing additional evidences and considerations on the within-year seasonality in the loan loss provisioning behavior of European listed banks observed in the last decade. 展开更多
关键词 loan loss provisions SEASONALITY BANKS earnings management means comparison
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