最常见的两种水蚤是 蚤状溞 （Daphnia pulex）和 大型溞 （Daphnia magna），其中前者较为常见而体形较小。 他们常常被认为与同属枝角目的 Moinidae 科的 Moina 的基因有关。 通常，它们的卵会被包裹在 ephippia （一种由 甲壳素 组成的厚壳，用于保护其度过冬季）中。 水蚤的本體通常為1-5毫米（0.04-0.20英寸）長, [1] 並且被劃分成段，雖然這種劃分是不可見的 [2]。 水蚤的頭部通常向下彎曲朝向身体并且与身体融合，有一个可见的槽口将两者区分开来。 在大多數物種 …

Daphnia pulex is the most common species of water flea. [3] It has a cosmopolitan distribution: the species is found throughout the Americas, Europe, and Australia. [4] It is a model species, and was the first crustacean to have its genome sequenced.

分布于世界各地，属于广温性物种，在北纬和中纬地带分布，常见于水潭、水坑、池塘以及小河等小型水域中，在南纬地带出现于湖泊或水库等敞水区。 [1] ^ 1.0 1.1 中国科学院动物研究所. 蚤状溞. 《中国动物物种编目数据库》. 中国科学院微生物研究所. [2009-04-28]. （原始内容 存档 …

Daphnia pulex is the most common species of the group of organisms known as water fleas. Their common name was given because of their general appearance and jerky swimming motions which resembles that of the land flea.

2011年2月4日 · Daphnia pulex, or the water flea, is a keystone species of freshwater ecosystems: a principal grazer of algae, a primary forage for fish , and a sentinel of lentic (still water) inland ecosystems. Their populations are defined by the boundaries of ponds and lakes, are sensitive to modern toxicants in the environment, and thus are used to assess ...

2025年3月15日 · Chronic exposure to TWP leachate at environmentally relevant concentrations can impair the growth, reproduction, and immune functions of Daphnia pulex, suggesting that TWP pollution could have long-term, multigenerational impacts on aquatic ecosystems. These findings underscore the potential long-term ecological risks of TWP and emphasize the ...

2010年1月13日 · Daphnia pulex is the first crustacean to have its genome sequenced. Availability of the genome sequence will have implications for research in aquatic ecology and evolution in particular, as addressed by a series of papers published recently in BMC Evolutionary Biology and BMC Genomics.

The globally distributed zooplankton Daphnia (commonly called the waterflea) is the first crustacean to have its genome sequenced. Daphnia has fascinated biologists for centuries because of its importance in aquatic ecosystems, its amenability to both field and laboratory study, and because of its remarkable ability and flexibility to cope with ...

2018年1月14日 · 蚤状溞(Daphnia pulex)是一种常见的淡水枝角类, 其个体较小, 繁殖周期短, 是第一个获得全基因组序列的枝角类(Cladocera) (Colbourne et al, 2011)。枝角类有其特殊的生殖方式:当温度、食物、种群密度等外界环境条件适宜时, 枝角类进行孤雌生殖(无性生殖), 由雌性个体直接 ...

Daphnia pulex is the most common species of water flea. It has a cosmopolitan distribution: the species is found throughout the Americas, Europe and Australia. It is a model species, and was the first crustacean to have its genome sequenced.