水 研 機 構 研 報, 第 42 号,79 - 104, 平 成 28 年 Bull. Jap. Fish. Res. Edu. Agen. No. 42,79-104,2016 79 Abstracts of Poster Presentations 1: Marine microalga Rhodomonas sp. as a novel 2: Observation and monitoring of asari clam live food for bivalves predators in a population-collapsed habitat using Field Server Satoshi Yamamoto*1, Masanori Okauchi*2 and Takao Yoshimatsu*1 Naoaki Tezuka*1, Naoto Kajihara*1, Tokihiro Fukatsu*2, Kazumasa Oguri*3 and Takehisa *1 Graduate School of Bioresources, Mie University, Yamakita*3 Tsu, Mie, Japan; *2 National Research Institute of Aquaculture, Fisheries Research Agency, Minamiise, *1 National Research Institute of Fisheries and Mie, Japan Environment of Inland Sea, Fisheries Research E-mail:
[email protected] Agency, Hatsukaichi, Hiroshima, Japan; *2 National Agriculture and Food Research Organization Recently, many species of bivalves, including the Agricultural Research Center, Tsukuba, Japan; asari clam have become more popular as seafood all- *3 Japan Agency for Marine-Earth Science and over the world. In spite of the increasing demands Technology, Yokosuka, Kanagawa, Japan of bivalves, the natural resources are becoming E-mail:
[email protected] scarce year by year. Therefore, stable aquaculture production of bivalves is highly required to The Nakatsu tidal flat, located in western Seto substitute the natural resources. Marine microalga Inland Sea, Japan, is known as an asari clam, Rhodomonas sp. is widely distributed in Japan’s Ruditapes philippinarum, population-collapsed coastal waters. This species has a high content of habitat. A recent study observed low clam survival highly unsaturated fatty acids (HUFAs) that enhance rates, < 15%/yr, from post-settlement until fishable the survival and growth of bivalves.