内湾および干潟における物質循環と生物生産【68】(最終回)

摘要

The fluctuations of the indigenous species and entrance species in Seto Inland Sea are examined. The fishes of indigenous species which were caught in large number and decreased much were launce and flatfish. The entrance species from the open sea were mainly sardine type fishes (sardine and anchovy) and the catches of those fishes were undergone a lot of change. The variations of catches except launce, flat fish and sardine type fishes were small relatively. The improvement of the oxygen-deficient water is requested for the improvement of the catches of launce and flat fish. The large changes of the catch of the sardine type fishes are thought to come off by regime sift.