Ephippia (singular: ephippium) are winter or dry-season eggs of the various species of small crustacean in the order Cladocera (within the Branchiopoda); they are provided with an extra shell layer, [1] which preserves and protects the resting stages inside from harsh environmental conditions until the more favorable times, such as spring, when ...

Daphnia is a genus of small planktonic crustaceans, 0.2–6.0 mm (0.01–0.24 in) in length. Daphnia are members of the order Anomopoda, and are one of the several small aquatic crustaceans commonly called water fleas because their saltatory swimming style …

2018年11月1日 · The ephippia of Daphnia are composed of a relatively solid outer layer and an inner layer, and a middle layer covered by cell-like polyhedral compartments, thus forming a honeycomb-like structure. On the one hand, this honeycomb structure can provide mechanical protection for resting eggs, and on the other hand, it can promote the passive ...

2018年11月1日 · We compared the internal structure and considered the potential functions of the ephippial walls of several species of Daphniidae. We found that the walls of ephippia in Daphniidae are composed of three interconnected layers of different structure.

Cladocerans may pass not only from the production of parthenogenetic eggs to the production of latent eggs in ephippia but may also backtrack from ephippia formation to formation of parthenogenetic eggs, as reported, e.g., for Moina and Daphnia (Makrushin, 1969).

2024年11月3日 · Daphnia, often colloquially referred to as "water fleas," are a group of small, primarily freshwater crustaceans belonging to the order Cladocera. They play a crucial ecological role as a central element in aquatic food webs, serve as indicators of water quality, and are widely used in scientific research.

2024年10月27日 · Daphnia, commonly known as water fleas, are tiny freshwater crustaceans that play a critical role in aquatic food webs and serve as an important indicator of environmental health. Found in diverse water bodies ranging from ponds to lakes, these minuscule organisms have piqued the interest of ecologists, biologists, and environmental scientists ...

2006年1月1日 · When conditions deteriorate, freshwater cladocerans from the genus Daphnia switch to production of diapausing eggs encased in chitinous shells called ephippia. Ephippia may serve for temporal...

2024年9月30日 · Daphnia, often referred to as water fleas, are a group of small, planktonic crustaceans found in a variety of freshwater ecosystems around the world. Known for their complex lifecycles, ecological significance, and responsiveness to environmental changes, Daphnia play a critical role in both the structure of aquatic food webs and in ...

2015年3月18日 · Estimates based on a simple two-source mixing model indicate that the amount of methanogenic carbon in Daphnia diet necessary to decrease δ 13 C values of Daphnia during ephippia formation from values close to δ 13 C SOM down to values observed for δ 13 C ephippia ranges from 0% to 20% for most lakes, but can reach up to 35% for some study ...