File:Дафния с ефиппиумом.jpg
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Русский: Дафния с ефиппиумом, косое освещение. бычно дафнии размножаються партеногенезом, то есть без помощи самцов, и из яиц появляются самки, которые являются клонами матери. Таким образом вся популяция дафний состоит из самок. Но когда наступают холода или засуха из таких яиц развиваются самцы, которые оплодотворяют самок. После чего внутри самки начинает образовываться эфиппиум с покоящимися яйцами. Эфиппиум имеет толстые стенки которые могут защитить яйца от промерзания, пересыхания, переваривания. При наступлении благоприятных условий из покоящихся яиц появляются самки, которые продолжают размножаются партеногенезом.
English: Daphnia with ephippium. Oblique lighting. Usually Daphnia reproduce by parthenogenesis, that is, without the help of males, and from the eggs there are females who are clones of the mother. Thus, the entire population of Daphnia consists of females. But when cold weather or drought sets in, these eggs develop into males that fertilize the females. After that, an ephippium with resting eggs begins to form inside the female. Ephippium has thick walls that can protect eggs from freezing, drying out, and digestion. When favorable conditions occur, females emerge from resting eggs, which continue to reproduce by parthenogenesis. English: Daphnia with ephippium. |
| Date | |
| Source | Own work |
| Author | Andrei Savitsky |
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I, the copyright holder of this work, hereby publish it under the following license:
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.
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This image was uploaded as part of Russian Science Photo Competition 2021.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 12:53, 13 April 2021 | | 6,719 × 4,747 (9.42 MB) | Andrei Savitsky (talk | contribs) | Uploaded own work with UploadWizard |
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