JpGU-AGU Joint Meeting 2017

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[JJ] Oral

A (Atmospheric and Hydrospheric Sciences) » A-CG Complex & General

[A-CG51] [JJ] Coastal Ecosystems - 1. Water Cycle and Land-Ocean Interactions

Wed. May 24, 2017 10:45 AM - 12:15 PM 301A (International Conference Hall 3F)

convener:Jun Shoji(Hiroshima University), Ryo Sugimoto(Faculty of Marine Biosciences, Fukui Prefectural University), Makoto Yamada(Research Institute for Humanity and Nature), Masahiko Fujii(Faculty of Environmental Earth Science), Chairperson:Jun Shoji(Hiroshima University), Chairperson:Ryo Sugimoto(Faculty of Marine Biosciences, Fukui Prefectural University), Chairperson:Makoto Yamada(Research Institute for Humanity and Nature), Chairperson:Masahiko Fujii(Faculty of Environmental Earth Science)

12:00 PM - 12:15 PM

[ACG51-11] Effects of submarine groundwater on growth of fishes: a cage experiment for flatfish juveniles

*Jun Shoji1, Ryo Sugimoto2, Hisami Honda3, Makoto Taniguchi3 (1.Hiroshima University, 2.Fukui Prefectural University, 3.Research Institute for Humanity and Nature)

Keywords:water-food NEXUS, Fishery resources, submarine ground water, flatfish, feeding, growth

In order to detect the possible effects of submarine groundwater discharge (SGD) on fish growth, a cage experiment were conducted in coastal waters of central Seto Inland Sea, Japan. Growth of juveniles of marbled sole, a flatfish species, temperature, prey availability in water and stomach contents of the juveniles were compared between sites with high and low SGDs monitored by the use of radon concentration. Juvenile growth rate, prey availability, stomach content weight per fish were higher at the site with high SGD while temperature did not differ between the two sites. The SGD was suggested to promote growth and feeding the juveniles in the tidal flat.