Are dogs good at spotting movement? Velocity thresholds of motion detection in Canis familiaris

来源 :动物学报(英文版) | 被引量 : 0次 | 上传用户:oihvhuhuiuiui
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The ability to perceive motion is a fundamental property of the visual system,and one of its most basic aspects is the ability to discriminate moving objects from motionless ones,for example,motion detection.Velocity thresholds represent the minimum rate of displacement over time unit that an animal is able to perceive as movement,any slower motion being not discriminable from a still object.Although such topic has grabbed the attention of scientists already at the beginning of the 20th century,the interest has waned in time,and velocity thresholds have thus far been assessed in only a handful of species.
其他文献
Fluctuations in food availability occur in many ecosystems and pose challenges to the organisms that inhabit them(Berg et al.2017).Because lizards have signific
欧美人为减肥,寄希望于不含天然脂肪的食物。他们烹调食物不用天然脂肪,而用脂肪代用品。例如,他们把蛋白质粉碎得非常细,吃起来有奶油的粘稠味儿,所含热量不足脂肪的一半。
针对目前低碳经济发展的趋势,总结了竹家具的环境优势,通过对竹家具在设计、生产、销售与售后服务等方面的分析,提出了对竹家具低碳设计及生产体系构建的建议。
For socialized animals,such as primates,emotions are the expres-sion of internal states,which may be recognized by others to adjust an individual's potential ac
Food resources vary in terms of digestibility and constraints in food processing are an essential factor driving the evolution of adapta-tions to cope with them
期刊
鸡西矿业集团公司张辰煤矿西三采区3
期刊
Nest sanitation behavior of altricial birds has been selected to reduce the exposure of young to pathogens,parasites,or predators,and thus to maintain the healt
  The topic of the thesis is the cabinet design for children aged from 3-10,to figure out design problem via analysis and research on function,shape,material,
会议
服药期间,合理的进食可以配合药物提高疗效,加快疾病康复,否则,不但降低疗效,还会产生副作用甚至造成严重后果。因此,服药期间的饮食调配十分重要,应引起足够的重视。 Medic
摘要:大多数农村数学教师是二十三岁以上的成年人,有与人交流的基础和自我表现的欲望;虽然,他们的抽象思维和逻辑推理能力强于其他学科教师,但是,就自身而言,形象思维胜于抽象思维;登台演讲,既可以锻炼教师的胆量,还可以温故而知新,加深对所学知识的理解。所以,暑期培训农村数学教师,要多交流少说教,多讲案例少讲理论,多让他们登台发言少让他们坐着听讲。  关键词:农村数学教师;暑期培训;继续教育  暑假对农村