The pioneering study towards resource recovery of Sinonovacula constricta (Lamarck, 1818) in the Ariake Sea, Kyushu, Japan

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K18731
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Aquatic bioproduction science
• Research Institution: Kumamoto University (2017); Fisheries Research and Education Agency (2015-2016)
• Principal Investigator: Yamada Katsumasa 熊本大学, くまもと水循環・減災研究教育センター, 特別研究員 (80569195)
• Research Collaborator: YAMAKITA Takehisa Saga Prefectural Ariake Fisheries Research Center ; NAKANO Tadashi Saga Prefectural Ariake Fisheries Research Center ; MIYAMOTO Yasushi Saga Prefectural Ariake Fisheries Research Center ; OKAMURA Kazumaro Saga Prefectural Ariake Fisheries Research Center ; KOMORITA Tomohiro Kumamoto Prefectural Fisheries Research Center ; KOBAYASHI Jun Kumamoto Prefectural Fisheries Research Center
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: アミノ酸安定同位体比 / アゲマキ / 好適環境 / 生存戦略 / 摂餌生態 / 個体群減耗要因

Outline of Final Research Achievements

Individuals of Sinonovacula constricta (Lamarck, 1818) and of these potential predator species (e.g., crab and polychaeta) were captured in Ariake sea, Kyushu, Japan. The results of stomach and gut contents (under microscope), and stable isotope (SI) of C, N and nitrogen SI of amino acids (Phe and Gul) of these individuals suggested that (1) S. constricta mainly preferred the diatom within bottom mud as its diet, but detritus and carrion within mud were also assimilated slightly, and (2) juvenile (< 2cm) of S. constricta were ingested by mainly crab species. In order to assess suitable habitat for S. constricta in Ariake sea, the results of (1) and (2) and physiochemical environments of bottom and its surface water were comprehensively evaluated. The results of this spatial elucidate suggested that areas of the actual habitat of S. constricta in Ariake sea were quite narrow compared with areas of the potential suitable habitat for this species.

Free Research Field

海洋生態学，個体群生態学，群集生態学