File:Дафнія з ефіппіумом.jpg
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Українська: Дафнія з ефіппіумом. Косе освітлення. Зазвичай дафнії разсможаються партеногенезом, тобто без допомоги самців, і з яєць з'являються самки, які є клонами матері. Таким чином вся популяція дафній складається з самок. Але коли настають холоди або посуха з таких яєць розвиваються самці, які запліднюють самок. Після чого всередині самки починає утворюватися ефіппіум з спочиваючими яйцями. Ефіппіум має товсті стінки які можуть захистити яйця від промерзання, пересихання, перетравлення. При настанні сприятливих умов з спочиваючих яєць з'являються самки, які продовжують розмножуються 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. Oblique lighting. |
| 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 Science Photo Competition 2020 in Ukraine. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 09:18, 29 November 2020 | | 6,719 × 4,747 (8.79 MB) | Andrei Savitsky (talk | contribs) | Uploaded own work with UploadWizard |
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