Studies on reproduction,protection and transplantation of gobiid fishes

Research Project

Project/Area Number	61304071
Research Category	Grant-in-Aid for Co-operative Research (A)
Allocation Type	Single-year Grants
Research Field	General fisheries
Research Institution	Nagasaki University
Principal Investigator	DOTSU Yoshie; Professor Faculty of Fisheries, Nagasaki University, 水産学部, 教授 (50039715)
Co-Investigator(Kenkyū-buntansha)	MATSUI Seiichi; Assistan Faculty of Agriculture, Kyushu University, 農学部, 助手 (60038297) YOSHINO Tetsuo; Instruct Faculty of Science, Ryukyu University, 理学部, 講師 (50117595) TAKITA Toru; Professor Faculty of Fisheries, Nagasaki University, 水産学部, 教授 (30039721) MIZUNO Nobuhiko; Profess Faculty of Science, Ehime University, 理学部, 教授 (70030319)
Project Period (FY)	1986 – 1988
Project Status	Completed (Fiscal Year 1988)
Budget Amount *help	¥8,000,000 (Direct Cost: ¥8,000,000) Fiscal Year 1988: ¥2,000,000 (Direct Cost: ¥2,000,000) Fiscal Year 1987: ¥2,000,000 (Direct Cost: ¥2,000,000) Fiscal Year 1986: ¥4,000,000 (Direct Cost: ¥4,000,000)
Keywords	Gobiid fish / Reproduction / Protection / 移植 / 人工採卵 / 繁殖生態 / 食性 / 成長 / 分布 / 生態 / 産着卵塊分布 / 越冬生態 / ホルモン処置による採卵 / 魚体特性 / 南西諸島
Research Abstract	The life history of an endemic goby Chaenogobius sp. in Lake Shinji, Shimane prefecture was studied. Each pair of the mature goby was enclosed in an artifical nest of vinylchloride pipe or earthernware pipe after injection of pituitary of silver carp or chum salmon. The treated goby deposited eggs on the inner wall of the pipe nest. The hatched larvae were reared to the adult size in vessles containing water of three different salinities. Mature dwarf goby Pandaka lidwilli, ranging 15 - 16 mm SL, deposited eggs in a artifical pipe nest after the same treatment as the above mentioned goby. The adult goby collected from the Goto Islands, Nagasaki Pref. and Hiwasa, Tokushima Pref. were transplanted to Nomo Bay near Nagasaki City where the goby had been become extinct some ten years ago. An ecological survey on the ice goby leucopasarion petersi was carried out at the downstream of the Yoke River, Oomishima Is., Ehime Pref. A proposal on the improvement of the reproduction of the goby at there presented. The distribution of the mud skipper Boleophthalmus pectinirostris on muddy tidal flats throughout Ariake sound was researched. The relationship between richness of benthic diatoms growing on the tidal flat and the growth of the goby was studied at estuaries of two rivers flowing into the sound. A synecological survey was done on the aquatic community in estuarine and coastral zones of Hikari City in the Seto Inland Sea. Seasonal aboundance, growth and food habit of five gobies, Amblychaeturichtys Hexonema, A. sciistius, Acentogobius pflauni, Favonigobius gymnauchen and Chaenogobius castaneus wwer studied.