<研究報告>琉球列島の河川から採集された魚類(英文)

概要

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Three hundred and eight species and 8 subspecies of fishes (310 species/subspecies), representing 160 genera in 70 families, were recorded from the rivers of the Ryukyu Archipelago. Most of these comprised indigenous fishes. although 18 species and 2 subspecies of introduced fishes were also recorded. Of the former, only 5 species were primary freshwater fishes, the others being diadromous. About 40 species/subspecies were collected primarily from freshwater. However, species' diversity was great in brackish water zone. The indigenous species/subspecies (except for 12 undescribed fishes, the distribution ranges of which remain undetermined) were classified into three zoogeographic categories : those from south of the Ryukyu Archipelago (southern species, 240 species/subspecies), those from the Ryukyu Archipelago to Japan proper (northern species, 29 species/subspecies) and those endemic to the Ryukyu Archipelago (11 species/subspecies). The number of species decreased gradually from the southern to northern islands.
国立科学博物館の論文
2001-06-22