Abstract
Transport processes of larval marbled sole (Pseudopleuronectes yokohamae) from the spawning ground to the juvenile habitat via a floating larval piriod are estimated by the ocean modeling in order to understatnd the ecosystem networks of the larval fish surveyed in Osaka Bay. The field surveys in 2014 showed that the floating larvae were a lot and widespred in Osaka Bay on later half of January though they were little on early January. The spawning grounds of the observed larvae are estimated using the two-way particle tracking model (PTM) combined the forward-in-time PTM with the backward-in-time one. The backward-in-time PTM results indicate that the spawning grounds of the observed larvae are only Osaka Bay and the neighbor area such as Harima Nada, Akashi Strait, Kitan Strait and Kii Channle. Furthermore, the results of forward-in-time PTM which particles run off from the spawning ground assumed with the backward-in-time one reveal that the origins of the observed larvae are mainly Osaka Bay though about 20% larvae at a survay station in the closed section of the bay were transported from the outside areas such as Akashi Strait and Harima Nada.
