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夜行瓶頸假說（英文：Nocturnal Bottleneck Hypothesis）為一個假說，用於解釋許多哺乳動物的特徵行為。1942年，提出了夜行瓶頸假說，大多有胎盤類哺乳動物在演化史上（兩億兩千五百萬年前至六千六百萬年前的白堊紀﹣古近紀滅絕事件）多屬於夜行性動物。雖然部分哺乳動物在這之後演化成了日行性動物，填補了恐龍滅絕後的生態位，然後這一億六千萬年的夜行生活在解剖學特徵上留下了許多適合夜行性的演化特徵，而許多的哺乳動物如今依然仍然為夜行性。
, The nocturnal bottleneck hypothesis is a h … The nocturnal bottleneck hypothesis is a hypothesis to explain several mammalian traits. In 1942, Gordon Lynn Walls described this concept which states that placental mammals were mainly or even exclusively nocturnal through most of their evolutionary story, starting with their origin 225 million years ago, and only ending with the demise of the non-avian dinosaurs 66 million years ago. While some mammal groups have later evolved to fill diurnal niches, the approximately 160 million years spent as nocturnal animals has left a lasting legacy on basal anatomy and physiology, and most mammals are still nocturnal.ogy, and most mammals are still nocturnal.
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夜行瓶頸假說（英文：Nocturnal Bottleneck Hypothesis）為一個假說，用於解釋許多哺乳動物的特徵行為。1942年，提出了夜行瓶頸假說，大多有胎盤類哺乳動物在演化史上（兩億兩千五百萬年前至六千六百萬年前的白堊紀﹣古近紀滅絕事件）多屬於夜行性動物。雖然部分哺乳動物在這之後演化成了日行性動物，填補了恐龍滅絕後的生態位，然後這一億六千萬年的夜行生活在解剖學特徵上留下了許多適合夜行性的演化特徵，而許多的哺乳動物如今依然仍然為夜行性。
, The nocturnal bottleneck hypothesis is a h … The nocturnal bottleneck hypothesis is a hypothesis to explain several mammalian traits. In 1942, Gordon Lynn Walls described this concept which states that placental mammals were mainly or even exclusively nocturnal through most of their evolutionary story, starting with their origin 225 million years ago, and only ending with the demise of the non-avian dinosaurs 66 million years ago. While some mammal groups have later evolved to fill diurnal niches, the approximately 160 million years spent as nocturnal animals has left a lasting legacy on basal anatomy and physiology, and most mammals are still nocturnal.ogy, and most mammals are still nocturnal.
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, 夜行瓶頸
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