Oncorhynchus keta

Oncorhynchus keta, commonly known as the chum salmon, is a species of anadromous fish in the salmon family. It is a Pacific salmon, and is often referred to as dog salmon or keta salmon.

Taxonomy

The scientific name of the chum salmon, Oncorhynchus keta, is derived from the Greek onkos ("hook"), rhyngchos ("snout"), and the local Russian name for the species, chavycha. It is one of seven species of Pacific salmon.

Description

Chum salmon are the second largest species of Pacific salmon, after the chinook salmon. They can grow up to 1 meter in length and weigh up to 15 kilograms. They are distinguished by their metallic, blue-green coloration and purple streaks, with fine black speckles.

Distribution and habitat

Chum salmon are found across the Pacific Ocean, from the west coast of the United States and Canada, to eastern Russia and Japan. They prefer colder waters, and are most commonly found in coastal areas.

Life cycle

Chum salmon have a complex life cycle that includes freshwater and marine stages. They hatch in freshwater streams and rivers, then migrate to the ocean as juveniles. After maturing in the ocean for several years, they return to their natal streams to spawn.

Conservation

Chum salmon populations are currently stable, but they face threats from habitat loss, pollution, and overfishing. Conservation efforts are focused on protecting their spawning habitats and managing fisheries sustainably.

See also

• Salmon
• Fisheries management
• Conservation biology