Table 3.

A topographical distribution coverage (%) of each animal at Mainland Japan and Amami-Oshima Island, Japan.

Region	Species	Common name	Migratory type	Coverage (%)
Mainland Japan	Anguilla japonica	Japanese eel	Diadromous	86.5 (59.6–100.0)
	Eriocheir japonica	Japanese mitten crab	Diadromous	84.2 (61.1–100.0)
	Macrobrachium japonicum	Freshwater prawn	Diadromous	69.2 (66.7–71.9)
	Gymnogobius petschiliensis	Floating goby	Diadromous	62.3 (52.6–77.8)
	Rhinogobius nagoyae	Freshwater goby	Diadromous	57.6 (38.9–89.9)
	Macrobracbium formosense	Freshwater prawn	Diadromous	55.6 (13.5–88.9)
	Plecoglossus altivelis altivelis	Ayu	Diadromous	52.8 (27.9–77.8)
	Tridentiger brevispinis	Dusky tripletooth goby	Diadromous	35.4 (23.3–58.3)
Amami-Oshima Island	Anguilla marmorata	Giant mottled eel	Diadromous	93.7 (93.8–95.7)
	Macrobrachium japonicum	Freshwater prawn	Diadromous	80.3 (66.3–100.0)
	Sicyopterus japonicus	Rock climbing goby	Diadromous	72.5 (51.1–100.0)
	Macrobracbium formosense	Freshwater prawn	Diadromous	60.1 (25.5–100.0)
	Tridentiger kuroiwae	Dusky tripletooth goby	Diadromous	53.1 (17.0–87.4)
	Plecoglossus altivelis ryukyuensis	Ayu	Diadromous	43.6 (17.0–81.8)
	Caridina multidentata	Japanese marsh shrimp	Diadromous	19.5 (6.2–39.6)
	Eleotris fusca	Sleeper gobies	Diadromous	6.5 (0.0–19.6)

The coverage was shown by mean and range (in parentheses) values of each three rivers in each region. Note that only top eight species of each region were shown.