Field Evidence for Bioluminescent Signaling in the Pony Fish, Leiognathus elongatus |
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| Authors: | Akara Sasaki Kou Ikejima Shigeru Aoki Nobuyuki Azuma Noboru Kashimura Minoru Wada |
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| Institution: | (1) 1153-1-203 Aiko, Atsugi-shi, Kanagawa, 243-0035, Japan;(2) Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan;(3) Faculty of Agriculture and Life Science, Hirosaki University, Bunkyo-cho, Hirosaki, 036-8224, Japan;(4) Aqua Geo Graphic Corporation 1-16-4-4F Kaminarimon Taitoh-ku, Tokyo, Japan;(5) Ocean Research Institute, The University of Tokyo, Nakano-ku, Minamidai 1-15-1, Nakano-ku, Tokyo, 164-8639, Japan |
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| Abstract: | Luminescence of the pony fish, Leiognathus elongatus, was observed in the natural environment during nighttime diving. The light was emitted from the lateroventral portion of the body, as bright rectangular-shaped luminescence patches turned on and off periodically. Luminescent fish had a distinct clear patch on the flank through which light was emitted, whereas non-luminous fish did not have such a clear patch. Both luminous and non-luminous fish were found within a shoal, where non-luminous individuals were chased by luminous ones. From previous morphological studies, the luminous and non-luminous individuals are likely to be male and female, respectively. Our observations provide field evidence that the luminescence functions as intraspecific communications in L. elongatus. |
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| Keywords: | luminescence Leiognathidae communication |
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