Lüskow, Florian; Polgári, Botond; Stibor, Herwig; Schachtl, Katrin; Abonyi, András (2025): Light effects on the vertical positioning of the freshwater jellyfish (Craspedacusta sowerbii Lankester, 1880) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.982995
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Published: 2025-06-17 • DOI registered: 2025-07-14
Abstract:
We experimentally manipulated the presence of light and light intensity (F = 36.7 μmol m⁻² s⁻¹; D = 0 μmol m⁻² s⁻¹; L = 4.8 μmol m⁻² s⁻¹; M = 21.4 μmol m⁻² s⁻¹) and tested their effects on the vertical positioning of the freshwater jellyfish (Craspedacusta sowerbii) medusae. For the experiments, approximately 100 C. sowerbii medusae were collected in August 2017 in two lakes (Haager Weiher and Leitner Weiher) in Bavaria, Germany. Testing was carried out at Seeon Limnological Station in close vicinity to the collection site. The experimental columns were 7.4 cm in diameter and 170 cm high and were marked with horizontal lines every 5 cm for visual position estimation. Four replicates run in parallel. One C. sowerbii medusa was used in each experimental column. Data cover three light treatments, each run twice: 1) 16:8 h full light (F)–dark (D) light intensity cycles (nF = 716, nD = 428), 2) 16:8 h full light (F)–full dark (D) light intensity cycles complemented with low (L) and medium (M) light intensities (nF = 96, nM = 96, nL = 48, nD = 288), and 3) altered light intensities in approximately 2-hour periods randomly among dark, low, medium, and full light intensities (nF = 96, nM = 76, nL = 72, nD = 336). Results show that light alone was sufficient to trigger a vertical position change of jellyfish towards the water surface, especially high light.
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Supplement to:
Lüskow, Florian; Polgári, Botond; Stibor, Herwig; Schachtl, Katrin; Abonyi, András (2025): Light increases surface occurrence of the freshwater jellyfish Craspedacusta sowerbii via positive phototaxis. Hydrobiologia, https://doi.org/10.1007/s10750-025-05955-6
Coverage:
Median Latitude: 48.577400 * Median Longitude: 11.577800 * South-bound Latitude: 48.450500 * West-bound Longitude: 11.327300 * North-bound Latitude: 48.704300 * East-bound Longitude: 11.828300
Date/Time Start: 2017-08-08T00:00:00 * Date/Time End: 2017-08-14T00:00:00
Minimum DEPTH, water, experiment: 0.00 m * Maximum DEPTH, water, experiment: 1.70 m
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Type of study | Study type | Lüskow, Florian | |||
| 2 | Date/time analysis, experiment | Date/time analysis exp | Lüskow, Florian | |||
| 3 | Species, unique identification | Species UID | Lüskow, Florian | Reference in WoRMS (WoRMS) | ||
| 4 | Species, unique identification (Semantic URI) | Species UID (Semantic URI) | Lüskow, Florian | Reference in WoRMS (WoRMS) | ||
| 5 | Species, unique identification (URI) | Species UID (URI) | Lüskow, Florian | Reference in WoRMS (WoRMS) | ||
| 6 | Number of specimens | No spec | # | Lüskow, Florian | Experiment (EXP) | Used per experimental column |
| 7 | Treatment: light condition | T:light | Lüskow, Florian | Experiment (EXP) | Level | |
| 8 | Treatment: light condition | T:light | Lüskow, Florian | Experiment (EXP) | Intensity | |
| 9 | Observation | Obs | Lüskow, Florian | Experiment (EXP) | ||
| 10 | DEPTH, water, experiment | Depth water exp | m | Lüskow, Florian | Experiment (EXP) | Geocode – Position of the jellyfish in the experimental water column in cm measured in 5 cm increments; water surface: 0 cm, bottom of the water column: 170 cm; thus, the larger the number, the deeper the jellyfish positioned in the water column |
| 11 | Treatment levels | Treatment levels | # | Lüskow, Florian | Experiment (EXP) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
26944 data points
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