Massive spawning behavior of the triplespine deepwater cardinalfish Sphyraenops bairdianus Poey, 1861 observed on an offshore sea mount in the West Mariana Ridge |
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| Authors: | Seinen Chow Hiroaki Kurogi Noritaka Mochioka Takashi Yanagimoto |
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| Affiliation: | 1.Japan Fisheries Research and Education Agency,National Research Institute of Fisheries Science,Yokohama,Japan;2.Japan Fisheries Research and Education Agency,Yokosuka Laboratory, National Research Institute of Fisheries Science,Yokosuka,Japan;3.Kyushu University,Fukuoka,Japan |
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| Abstract: | Using a hydrographic echo sounder, we encountered an animal aggregation on a sea mount summit (350 m deep) at the West Mariana Ridge (14°07’ N, 142°48′ E). The aggregation suddenly ascended from the summit at civil dawn, and we were able to capture the ascending aggregation at the next dawn using a large midwater trawl net. Hundreds of fishes captured were determined to be Sphyraenops bairdianus (Poey, 1861). Hydrated eggs in the ovary were histologically confirmed, indicating that this species performed a massive spawning associated with an offshore sea mount and sunrise. |
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