PrimoryeSea
Chum salmon, Oncorhynchus keta
Chum salmon    Passing species. One of the most widespread representatives of Pacific salmon. In Primorye, occurs everywhere from Tumannaya River to the northeastern coast, into whose rivers (Edinka, Kabanja and others) keta had in recent years regularly entered to reproduce after a lengthy hiatus. KetaТs overall range includes the entire North Pacific area.
   In the sea, prior to entering rivers, the keta has a silvery color without small dark spots and stripes on its body. In rivers, before spawning, their body, palate and gill arch bases blacken, and its teeth increase in size. The keta grows to 102 cm long to weigh 15 kg. Matures in the third-fifth years of life, less frequently at an older age.
   Its spawning run into the rivers of northern Primorye begins in August, and its mass entry and spawning in the second half of September-October when the water temperature in rivers ranges from 5 to 10oC. In southern Primorye, the keta enters rivers to spawn in later periods. Its spawning grounds in Primorye rivers are usually situated in their lower or middle reaches. Spawning occurs in sites with weak currents, where the floor is covered with small pebbles and gravel. Some fish spawn in lower channels supplied by ground waters. The roe is placed in mounds. Having laid the roe, the exhausted fish die. Larvae peck out in spring and, unlike the cherry salmon young, they do not remain in the river and instantly roll into the sea. Having done that, during the first summer the young live in coastal waters, in inlets and bays to migrate only later into the open waters of Japan Sea and the Pacific.
   In its sea life period, keta is distributed over a vast area to intensely feed on various crustaceans and fish fry. In two or four years, having reached sexual maturity, it starts migrating to native rivers to display well-pronounced homing. The keta is a valuable species and an object of limited commercial fishing in both Peter the Great Bay and northern Primorye. In recent years, its catches have been significantly higher than those of other Primorye Pacific salmon species have.
  
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