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No.89 (2016/9) >

 
Title :琉球大学千原池および池に流入する小河川の淡水性貝形虫群集
Title alternative :Freshwater ostracode fauna of the Senbaru pond of the University of the Ryukyus and the small river flowing into the pond, Middle Part of Okinawa Island, Japan
Authors :田吹, 亮一
野島, 隆太
Authors alternative :Tabuki, Ryoichi
Nojima, Ryuta
Issue Date :Sep-2016
Abstract :The present paper reveals the seasonal change of the species composition and the population density of the freshwater ostracodes living in the Senbaru pond of the University of the Ryukyus and the small river flowing into the pond. Two sampling sites,A and B,are situated ; one (A) in the small river and the other (B) at the southwestern margin of the pond. The three kinds of samples for ostracodes (gravel-bearing sandy sediments,large gravels with minute algae and fallen leaves) were collected at the site A. The sample at the site B is the residue which was collected through a plankton net from the surface water adjacent to aquatic plants, mainly water hyacinth. The live ostracodes collected consist of 4 species, Cypridopsis vidua, Darwinula stevensoni, Dolerocypris fasciata and Physocypria. nipponica. C. vidua dominantly occurred, while the other three species were relatively rare. The decrease of the population density of ostracodes in June and September at the site A might be due to the prominent lowering of the dissolved oxygen concentration, and the decrease from June to September at the site B due to the high temperature around 30℃. The freshwater ostracode fauna from the study area can be characterized by a few species number and low population density.
Type Local :紀要論文
ISSN :1345-3319
Publisher :琉球大学教育学部
URI :http://hdl.handle.net/20.500.12000/35567
Citation :琉球大学教育学部紀要=Bulletin of Faculty of Education University of the Ryukyus no.89 p.159 -169
Appears in Collections:No.89 (2016/9)

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