| Presentation | 2015-11-09 Information transfer in fish schools Masa-aki Sakagami, Kei Terayama, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We investigate mechanism of information transfer in fish schools by analyzing the moving images filmed from the bottom of a tank of an aquarium. We focus on torus state of sardine schools among several ones of group, i.e. swarm, torus and parallel states. Through using automatic measurement velocity vector data based on evaluation of optical flows, we review that the analyses based on several averaging procedures are quite useful. It is well-known that two activities of fishes, agitation and burst, have an important role for swift reaction and information transfer of fish schools, which are ignited in cases of strong predations. We show that agitation and burst, both of which have significant role for swift reaction of fish schools, can be quantitatively detected by observing propagation of wave over neighboring regions. In addition, we frequently observe the process called weak agitation, which is modest type of agitation. Non-stationarity and unceasing large fluctuation, which are remarkable natures of fish schools, might be related to weak agitation and its ubiquity. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Fish schools / optical flow / torus / burst / agitation |
| Paper # | CCS2015-54 |
| Date of Issue | 2015-11-02 (CCS) |
| Conference Information | |
| Committee | CCS |
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| Conference Date | 2015/11/9(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Inamori Foundation Memorial Building, Kyoto Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Interaction and Communication, etc. |
| Chair | Hiroo Sekiya(Chiba Univ.) |
| Vice Chair | Yasuhiro Tsubo(Ritsumeikan Univ.) / Naoki Wakamiya(Osaka Univ.) |
| Secretary | Yasuhiro Tsubo(Kagawa National College of Tech.) / Naoki Wakamiya(Kyoto Sangyo Univ.) |
| Assistant | Takayuki Kimura(Nippon Inst. of Tech.) / Song-Ju Kim(NIMS) / Ryo Takahashi(Kyoto Univ.) / Junnosuke Teramae(Osaka Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Complex Communication Sciences |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Information transfer in fish schools |
| Sub Title (in English) | |
| Keyword(1) | Fish schools |
| Keyword(2) | optical flow |
| Keyword(3) | torus |
| Keyword(4) | burst |
| Keyword(5) | agitation |
| 1st Author's Name | Masa-aki Sakagami |
| 1st Author's Affiliation | Kyoto University(Kyoto Univ.) |
| 2nd Author's Name | Kei Terayama |
| 2nd Author's Affiliation | Kyoto University(Kyoto Univ.) |
| Date | 2015-11-09 |
| Paper # | CCS2015-54 |
| Volume (vol) | vol.115 |
| Number (no) | CCS-300 |
| Page | pp.pp.53-56(CCS), |
| #Pages | 4 |
| Date of Issue | 2015-11-02 (CCS) |