Page 16 - 몽골 어류도감 편집본

Freshwater Organisms in Pixels Fish of the Amur River List of fish

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Lethenteron reissneri (Dybowski, 1869) Abbottina rivularis Basilewsky, 1855

Far hastern brook lamprey Chinese false gudgeon

Korean name Mongolian name Sample number Korean name Mongolian name Sample number
다묵장어 Хорхой загас NNIBR-P36449 버들매치 Хятадын хуурамч гүрц NNIBR-P11522

Form Form
Body dark brown on back and white on belly; 7 external gill openings behind eyes; single nostril opening Lower lip continuous, with two median lobes along its posterior margin, separated by a median furrow.
in front of both eyes; Jawless mouth forms a circular sucking disc. myotomes from last gill aperture to No papilla on lips. One pair of short maxillary barbels. Anus close to ventral fin base than to anal fin
origin of anal fin 58-64. Lateral line neuromasts unpigmented. Gular region unpigmented. Second dorsal base. Body with eight rounded dusky blotches along lateral line. Mouth inferior; dorsal with convex
fin unpigmented. Caudal fin shape, spade-like. distal margin; several vertical rows of black dots on caudal. Number of gill rakers 8-15. Dorsal fin rays iii
7-8. Anal fin rays iii 5-7. Lateral line complete, with 36-41 scales.
Distribution
In Mongolia: only recorded in Onon drainage. Distribution outside Mongolia: Eurasia, in Arctic Oceans Distribution
basin, from Kola Peninsula to Anadyr drainage; Amur drainage; Sakhalin Island; Korea; Hokkaido. In Mongolia: Alien species of the Buir Lake (Pacific ocean basin). Outside Mongolia: eastern China,
Korea and Japan.
Ecological characteristics
Inhabits in clear streams with moderate current over gravel or sand and in shore with plant debris. The Ecological characteristics
lamprey in Mongolia reach to 23-48 cm. Males smaller than females. Spawning from May to June. Lays Inhabit shallow zones of lentic rivers and lakes with sandy or muddy bottoms. The male builds a nest
eggs in riffles on gravel-sand or stone bottom. Feeds on algae and detritus. 15-40 cm in diameter on the bottom of the river, at a depth of 10-30 cm, and broods over the spawn.
1,500-1,700 eggs were found in a single nest.

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