Spawning nests of six goby species in a newly-established fish-way on the Onga River estuary barrage
2018
Koyama, A. (Kyushu University, Fukutsu, Fukuoka (Japan). Fishery Research Laboratory) | Matsunaga, S. | Kawamoto, T. | Kanno, K. | Sawa, K. | Onikura, N.
A new fish-way, comprising variously-sized bed materials on a gentle slope, established on the Onga River estuary barrage was found to have 69 cobbles and boulders used as spawning nests of six goby species, including a threatened species, during the period from June 2013 to May 2014. Male body sizes were positively correlated with spawning substrate. In addition, wide salinity variations recorded over the fish-way during high tides on either side of spring tide were also implicated in goby spawning site selection.
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