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ItalianoUltra-violet radiation (UVR) is an environmental stressor in several ecosystems and can affect organisms’ survival and reproduction, and community structure. Rotifers cope with UVR stress adopting preventive behavioral and metabolic mechanisms. However, the demonstration of an immediate behavioral response in rotifers is missing. We investigated the short-term response of rotifers to UVR, by combining video analysis and movement ecology methods, in three common species: Brachionus calyciflorus, Keratella cochlearis and Keratella quadrata. We recorded the behavior of B. calyciflorus (both sexes), K. quadrata and K. cochlearis (females) exposed to white light (WL), and to intermittent cycles of UVR (30:30 seconds). Individual trajectories were extracted from videos with open-source software. We found that B. calyciflorus females exposed to UVR exhibited strong negative phototaxis with increased swimming speed, and a weak positive phototaxis in males. Keratella cochlearis and K. quadrata showed a weaker response. Our study reveals a species-specific behavioral response to UVR in rotifers. Furthermore, we highlight how sexual dimorphism in B. calyciflorus does not only occur in morphology and movement, but also in behavioral traits. Our results help to understand community dynamics by providing a mechanistic explanation of UVR response in one major zooplankton taxonomic group.
| Citation: | Colangeli, P.; Schlägel, U.; Obertegger, U.; Peterman, J.; Tiedemann, R.; Weithoff, G. (2019). Negative phototactic response to UVR in three cosmopolitan rotifers: a video analysis approach. HYDROBIOLOGIA, 844: 43-54. doi: 10.1007/s10750-018-3801-y handle: http://hdl.handle.net/10449/50908 |
| Internal authors: | |
| Organization unit: | Department of Sustainable Agro-ecosystems and Bioresources # CRI |
| Authors: | Colangeli, P.; Schlägel, U.; Obertegger, U.; Peterman, J.; Tiedemann, R.; Weithoff, G. |
| Title: | Negative phototactic response to UVR in three cosmopolitan rotifers: a video analysis approach |
| Journal: | HYDROBIOLOGIA |
| Issue Date: | 2019 |
| Scientific Disciplinary Area: | Settore BIO/07 - Ecologia |
| Keywords ENG: | Risk avoidance behavior Brachionus calyciflorus Keratella cochlearis Bemovi software Movement models |
| Language: | English |
| IF: | With Impact Factor ISI |
| Publication status: | Published |
| Nature of content: | Articolo in rivista/Article |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1007/s10750-018-3801-y |
| Appears in Collections: | 01 - Journal article |
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| File | Description | Type | License | |
|---|---|---|---|---|
| 2019 H Obertegger.pdf | Versione editoriale (Publisher’s layout) | Tutti i diritti riservati (All rights reserved) | Utenti riconosciuti Request a copy |
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