Page 45 - 몽골 어류도감 편집본

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

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Brachymystax lenok (Pallas, 1773) Thymallus grubii Dybowski, 1869

lenok Amur grayling

Korean name Mongolian name Sample number Korean name Mongolian name Sample number
Зэвэг NNIBR-P36424 Амарын хадран NNIBR-P36392

Form Form
Body relatively round in shape. Mouth small, subterminal. On the jaws and palate have teeth. Scales Back is darkish gray; sides blear pink, and belly silvery pallid. On the sides crystalline dark spots, and
small. Behind dorsal fin has adipose fin. Caudal fin not deeply forked. Sides of body, head, dorsal and bellow lateral line, spots smaller, not well noticeable, their number decreases. Vague outlined large pink
adipose fins have medium rounded dark brown spots. On the sides of body have 6-8 brazen red parr spot on the body side above pelvic fin. Dorsal fin edge with small pink spots. Body covered densely
marks. Dorsal fin rays iii-iv 10-11. Anal fin rays iii-v 8-11. Gill rakers 19-29. Lateral line with 107-152 scales. sitting medium scales. Upper jaw extends to middle of eye. Adipose fin is crimson. Caudal and anal fins
reddish brown. Gill rakers 16-20. Dorsal fin rays vii-x 12-14. Anal fin rays iii-iv 8-10. Lateral line with 78-
Distribution 100 scales.
In Mongolia: Selenge, Yenisei and Amur drainages; might be present in Bulgan drainage. Outside
Mongolia: rivers draining to Arctic and Pacifi c Oceans, from Ob to Amur. Distribution
Ecological characteristics In Mongolia: Onon and Kherlen drainages. Outside Mongolia: Upper and middle Amur drainage in
Russia and China.
A slow-growing fish which inhabits rivers. A cold water fish and never goes to the ocean; finds deep
cold waters during summer; can be found under the ice in late fall and winter. Feeds on larval and adult Ecological characteristics
insects, amphipods, small fish, frogs, mice and salmon spawn. During spawning the body turns to a Inhabits in rivers with high oxygen, strong current and rocky bottom. Wintering in deep sites of rivers.
dark red and the dorsal and pectoral fins change to a rainbow of colors. Body length reach up to 30 cm. Spawning in spring from late April, in upper reaches of the rivers. Feeds
on benthic insect larvae and imago of terrestrial insects that have fallen on the water.

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