Results 21 to 30 of about 58,359 (220)
Latent target groups—A methodological contribution of social identities to policy design research
Policy Studies Journal, EarlyView.Abstract Research on policy design underscores the importance of accurately identifying target groups to effectively design policy measures that change individual behavior, address societal problems, and achieve policy objectives. However, empirical research on the composition and characteristics of target groups is rare and primarily draws on a ...
Johanna Hornung +2 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2012 研究了一类捕食种群、食饵种群同时具有收获率的Holling III类功能反应生态系统.其中食饵种群具有非线性密度制约，捕食者无密度制约.应用微分方程定性理论，讨论了该微分生态系统.研究了系统的平衡点，对中心焦点的阶数、稳定性做出了分析.得出当给定参数满足一定条件时，系统不存在极限环.利用Hopf分支理论和张芷芬唯一性定理，证明了该系统极限环的存在性和唯一性.结果表明，2种群的密度或产生周期性的变化，或都稳定在一组定值的附近，可以保持一种稳定状态.
LIUJuan(刘娟), LIYi-min(李医民)
doaj +1 more source
A new beef: An analysis of discourse coalitions in the nascent cellular agriculture policy subsystem
Review of Policy Research, EarlyView.Abstract A robust approach to examining the nature and influence of coalitions in the policy process is the Advocacy Coalition Framework (ACF), which is especially useful to study policy issues fraught with scientific and technical controversy. Yet, important gaps exist in ACF literature regarding nascent policy subsystems. Consequently, there is scant
Nikki Nadeau, Ramiro Berardo
wiley +1 more source
Innovating Public Food Procurement: A Case Study of Dordogne's Path to Sustainability
Review of Policy Research, EarlyView.ABSTRACT This study examines how an innovative mix of policy instruments can drive sustainable public food procurement (SPFP) in public institutions. Using the Dordogne Department in France as a case study, it explores the role of governance, capacity‐building, stakeholder collaboration, digitalization, and cost management in transforming school food ...
Paola Vola +5 more
wiley +1 more source
野生动物学报, 1999 我们都熟知蚂蚁和蜜蜂的社会性生活,但对高等动物的社会性生活了解的不多.狼有集群的习性,但也常常单只活动.狼何时集群,何时单独活动.这是由许多因素决定的.社会性的食肉类动物至少可以从合作中获得好处.所有社会性的食肉动物都知道群体捕食比单独捕食有效得多,这往往被认为是促使它们集群生活的重要原因.合作捕食会从两个方面提高捕食的成功率:（1）能够捕获大型猎物;（2）能提高成功捕杀猎物的百分率.每种益处的重要性都是变化的,这主要依赖于所涉及的捕食者和猎物的种类.
高中信, 王秀辉, 于学伟
doaj
野生动物学报, 2021 为了探究同域分布的黑颈长尾雉（Syrmaticus humiae）和白鹇（Lophura nycthemera）冬季觅食时间分配及分化，2017年和2018年冬季在广西岑王老山国家级自然保护区布设了123台红外相机。结果：保护区内黑颈长尾雉和白鹇在冬季期觅食地存在重叠现象；在觅食时间分配上，黑颈长尾雉存在3个觅食高峰，分别在7：00—8：00、11：00—12：00和16：00—18：00，白鹇有2个觅食活动高峰，分别在10：00—11：00和14：00—15：00，白鹇的觅食高峰较黑颈长尾雉的往后推迟，
辛桂瑜 张廷瑞 陈金莲 严海连 刘玲 张嘉宏 李桂芬 贝永建
doaj
Review of Policy Research, EarlyView.ABSTRACT This study adopts a policy‐centric perspective to explore the complex relationship between sustainable nitrogen management (SNM) and the health risks associated with unsafe drinking water. The critical policy challenge lies in balancing the essential role of nitrogen fertilizers in achieving high agricultural productivity with their ...
Mingean Park +3 more
wiley +1 more source
野生动物学报, 2019 利用粪便分析法对宁夏贺兰山地区狗獾的夏季食性进行了研究。采集狗獾活动范围内的粪样，运用频率法和生物量比法对数据进行处理，得到狗獾夏季的食性组成和比例。结果显示，狗獾属杂食性广食者，其夏季食物组成共有10种6大类，从出现频率来看，食物组成主要是昆虫（3822%）、果实（1378%）、蚯蚓（1289%）、昆虫幼虫（1200%）等，从生物量比来看，食物组成主要是蚯蚓（6183%）、果实（2942%）、昆虫（405%）、昆虫幼虫（315%）等，两种结果都显示蚯蚓在狗獾的夏季食谱中占据重要位置 ...
任毅 1 王继飞 2 高惠 1 刘振生 1 +1 more
doaj
Integrative Conservation, Volume 4, Issue 2, Page 143-153, June 2025.This study provided information on the abundance, population demography and activity pattern of an endangered species of Gekko badenii at the type locality of Ba Den Mountain, southern Vietnam. Local and international use and trade in Gekko badenii for food consumption and as pet were investigated and conservation recommendations highlighted.
Hai Ngoc Ngo +8 more
wiley +1 more source
Integrative Conservation, Volume 4, Issue 2, Page 134-142, June 2025.Our study addresses the significant knowledge gap regarding the wintering population and habitat utilization of the Yellow‐breasted Bunting (Emberiza aureola) in Nepal, providing crucial insights that can aid in the conservation of this critically endangered species in wintering grounds.
Hem Bahadur Katuwal +6 more
wiley +1 more source