The amur pike (Esox reicherti Dybowski) in Fishes of the Amur Basin (results of the Ichthylogical Expedition to the Amur Region, 1945-1949 by G. V. Nikolsky, 1956) (Fisheries research report: 1787)

-11 -the big lakes to the Amur River, but instead ascends to the larger lake
tributaries —as examples, from Bolon Lake to Harpi River, from Udil
Lake to rivers Pildu and Bichi, and from Orel Lake to Dzhapi River.
In winter, pike do not become sluggish and stay at the bottom,
but live actively throughout the whole winter continuing intensive feeding.
Pike inhabiting the Amur River region do not perform long distance
migrations. Marking experiments carried out in October 1937 and 1939 by
V. T. Bogoaevsky (1947) showed that 89% of marked fish had been recaptured
20 km or less from the place of release; 11%o had been recaptured at the
distance of 160 km from the place of release. In terms of time, 38. 3% of
marked fish had been caught in less than 100 days after marking, 45. 2% in
100-200 days (in the time of spawning migration) 10. 9% in more than 200
days, and 5. 6% in more than a year.
The role of the pike in the life of
Amur ichthyo fauna
Pike in the Amur River region appear to be the most numerous
and widely distributed predator. It has a strong influence on the populations of caras, cebak, podust-chernobriushka, vostrobriushka, coriushka
and peskar(s) reducing their number. Pike feeding in the summer on
caras, and in winter on coriushka, peskar(s), and vostrobriushka, compete
with other predators, particularly with the som (the Amur catfishes,
Silurus soldatovi and Parasilurus asotus); they compete with kitaiski okun
(Chinese sea perch, Siniperca chua-tsi, Basilewsky) and zmeegolov

(Orhiocephalus argus warpachowskii Berg) for caras; and they compete
with predatory members of Cultrinae for koriushka and vostrobriushka.