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					|  | Japanese Journal of Ichthyology |  |  
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					|  |  Volume 50, Number 1, May 23, 2003 |  |  
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											| CONTENTS |  
											| Announcement |  
											| Full Papers |  |  
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											| The freshwater fish fauna of the rivers 
												flowing into the Seto Inland Sea in Hiroshima Prefecture Takuro Hirayama and Nobukazu Nakagoshi  … 
												1
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											| Effects of pool type fishways on the 
												distribution of diadromous fishes in Hokkaido Kazutaka Shimoda, Shigeru Nakano and Yugo 
												Ono   … 15
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											| Seasonal changes in fishes ascending 
												a paddy field ditch in the Naka River system, central 
												Japan Tomoyuki Nakamura and Norio Oda  … 
												25
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											| Fine structures and functional characteristics of the gamete of the Japanese sand lance, Ammodytes personatus Masako Hara  … 
												35
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											| Feeding habits of introduced smallmouth bass in Lakes Aoki and Nojiri, Japan Taiga Yodo and Kei-ichiro Iguchi  … 
												47
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											| Biochemical and morphological comparison between two Japanese daces, Phoxinus lagowskii steindachneri and P. oxycephalus jouyi in the sympatric sites Tomohiko Fujita and Kazumi Hosoya  … 
												55
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											| Spawning habitat selectivity of shishamo smelt Spirinchus lanceolatus in a small mountain stream in southern Hokkaido, Japan Shirou Sagawa, Katsuya Misawa, Yuji Seo and Futoshi Nakamura  … 
												63
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											| Record of a flathead, Rogadius tuberculatus (Teleostei: Platycephalidae), from Nakagusuku Bay, Okinawa Island, southern Japan Mitsuhiro Sakashita, Hisashi Imamura and Tetsuo Yoshino  … 
												67
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											| Mitochondrial DNA phylogeny of Japanese freshwater goby, Odontobutis obscura, and an evidence for artificial transplantation to Kanto District Takahiko Mukai and Mutsumi Nishida  … 
												71
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											| Book Review  … 77 New Publications  … 79
 News & Comments  … 80
 Proceedings  … 92
 Editorials  … 94
 Japanese Abstracts
 Papers published in Ichthyological Research, Volume 50, 
												Numbers 1 & 2  … 95
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