File:Личинка комара Коретра. Косое освещение и темное поле.webm
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Русский: Corethra — род насекомых семейства НЕ кровососущих комаров. Личинки активные хищники, питаются мелкими беспозвоночными: дафниями, циклопами и личинками других комаров. На последнем сегменте тела находится хорошо развитый хвостовой плавник, главный орган движения. Личинки комаров подсемейства Chaoborinae отличаются от других присутствием в грудном сегменте двух больших трахейных пузырей, являющихся гидростатическим аппаратом. Пузыри сверху покрыты пигментными клетками, с темным пигментом. Такие же пузыри расположены в седьмом брюшном сегменте. Благодаря этому аппарату личинки держатся в воде в горизонтальном положении. Значение для перемещений личинки имеют также покрывающие пузыри пигментные клетки. Если эти клетки расширяются, то, в результате поглощения ими солнечных лучей, трахейные пузыри, нагреваясь, увеличиваются в объеме, удельный вес личинки становится меньше и она поднимается кверху; сокращение пигментных клеток приводит к увеличению удельного веса и опусканию личинки.
English: Corethra - a genus of insects of the family NOT blood-sucking mosquitoes. Larvae are active predators, feed on small invertebrates (daphnia, cyclops) and larvae of other mosquitoes. On the last segment of the body there is a well developed caudal fin, the main organ of motion. The larvae of mosquitoes of the Chaoborinae subfamily differ from the larvae of other mosquitoes by the presence in the thoracic segment of two large, well-marked tracheal blisters that are hydrostatic. Bubbles from above are covered with pigment cells containing a dark pigment. The same tracheal blisters are located in the seventh abdominal segment. Thanks to this apparatus, the larvae are kept in the water in a horizontal position. Some significance for the movements of the larvae is also covered by the blisters of the pigment cells. If these cells expand, then, as a result of their absorption of rays penetrating into the water, the tracheal blisters, when heated, increase in volume, the specific weight of the larva becomes smaller and larva it rises upward; reduction of pigment cells leads to an increase in the specific weight and lowering of the larva English: Corethra mosquito larva. Oblique lighting and dark field |
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| Source | Own work |
| Author | Andrei Savitsky |
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This image was uploaded as part of Russian Science Photo Competition 2018.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 14:03, 29 September 2018 | 2 min 21 s, 1,920 × 1,080 (56.13 MB) | Andrei Savitsky (talk | contribs) | User created page with UploadWizard |
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