Discovery of an Earliest-Stage 'Mystery Circle' and Development of the Structure Constructed by Pufferfish, Torquigener albomaculosus (Pisces: Tetraodontidae)
| Autor: | Koh Hosoda, Shigeru Kondo, Daisuke Iwai, Masahiro Shimizu, Hiroshi Kawase, Yuki Kitajima, Hirofumi Shin, Ryo Mizuuchi |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine Middle stage lcsh:QH426-470 reproductive behavior ved/biology.organism_classification_rank.species three-dimensional morphogenesis Shell (structure) Aquatic Science 01 natural sciences Torquigener albomaculosus 03 medical and health sciences Paleontology Stage (stratigraphy) Amami-Oshima Island Tetraodontidae lcsh:QH301-705.5 Ecology Evolution Behavior and Systematics Ecology biology paternal egg care ved/biology 010604 marine biology & hydrobiology Reproductive behavior Radius biology.organism_classification lcsh:Genetics 030104 developmental biology lcsh:Biology (General) spawning ecology Development (differential geometry) Cartography |
| Zdroj: | Fishes, Vol 2, Iss 3, p 14 (2017) |
| ISSN: | 2410-3888 |
| DOI: | 10.3390/fishes2030014 |
| Popis: | Male pufferfish (Torquigener albomaculosus) construct “mystery circles”, geometric circular structures with radially aligned peaks and valleys, on sandy seabeds for reproduction. We discovered an earliest-stage mystery circle composed of dozens of irregular depressions. The structure changed to a primitive circular form with radially aligned valleys and a circular depression in the central area on day 2. The number of valleys increased, and the radius of the structure was much smaller than that of the final structure. These features were observed from days 2 to 4, considered the early stage of construction. The mystery circle had radially aligned peaks and valleys with a central flat area, while the radius and the differences in elevation between the peaks and valleys were increasing. These features, which were observed from days 5 to 8, were considered the middle stage of construction. On day 9, the mystery circle was completed. An irregular pattern was formed in the central area, and the radially aligned peaks were decorated with shell and coral fragments. These are the first recorded observations of construction of a mystery circle from the earliest stage. |
| Databáze: | OpenAIRE |
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