中海中心水域におけるアサリの生残試験と浅場の評価

概要

論文の詳細を見る
The survival test of Ruditapes philippinarum was carried out in Lake Nakaumi, to clarify the reason why the clam could not increase in this brackish lake recently. Five transect lines were designed in Lake Nakaumi. Three containers with R. philippinarum were set on the lake bottom of each transect line, with the depth of 1.5m, 2.5m and 3.5m. All clams on the lake bottom of 3.5m in depth died soon after the start of the experiment. All clams in the west side of the lake also died even on the shallowest. In contrast, clams in the east part of the lake survived through the summer, while the clams along the trench died finally in autumn. The environment of the shallow bottom was evaluated based on the survival test and current distribution of the clam. The result suggests that the lower oxygen and anoxic lake water developed by the construction of embankments and dredging for reclamation is one of the main limiting factors for the R. philippinarum in Lake Nakaumi.
日本水産工学会の論文
2005-07-15