A study on the distribution and migration of Coilia nasus in Ariake Sound off Saga Prefecture
2017
Ito, T. | Kanzaki, H. | Masuda, Y. | Umeda, T. | Aramaki, H.
The distribution of Coilia nasus in the Rokkaku River estuary in Saga Prefecture was determined based on results of a fishery survey. In addition, the effectiveness of external tagging and the movement of C. nasus were also investigated based on results of a mark and recapture study. The aim was to clarify the ecology of C. nasus found in the Ariake Sound off the coast of Saga Prefecture. It was found that C. nasus was distributed either within the Rokkaku River or in the river offing all year round. Moreover, tagged specimens were recaptured until up to 88 days after their release, which is indicative of the effectiveness of external tagging as a tool for studying C. nasus movement. Results also suggest that C. nasus moves between Rokkaku and Chikugo rivers and in accordance with the tide.
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