Pink Salmon - Oncorhynchus gorbuscha



They have very small scale and pink flesh. As adults closer to return to fresh water, they develop a lot of large black spots on their backs and their tails. In the pink of their spawning streams approach, males brown to black on the back with a bright white belly. Females have a bright white belly, but put an olive green with dark bars and patches of lavender or a dark gold. By the time men go to the stream where they spawn, they have a very large hump and hooked jaws called kype.
In the ocean, pink salmon are bright silver fish. After returning to their spawning stream, the color changes to light gray on the ass with a yellowish white belly (although some turn an overall dull green color). Like all salmon, in addition to the dorsal fin, they have an adipose fin. The fish is characterized by a white mouth with black gums, no teeth on the tongue, large oval black spots on the back and v-shaped tail, and an anal fin with 13 to 17 soft rays. During their spawning migration, males develop a pronounced spine bumps, hence their nickname "humpies". Pink salmon average 4.8 pounds (2.2 kilograms) in weight. The maximum size recorded was 30 inches (76 cm) and 15 pounds (6.8 kilograms).
Pink salmon in their natural range have a strict two years life cycle, so even and odd-year populations not cross. Adult pink salmon enter spawning streams from the ocean, usually returning to the stream, or race, where they came from. Spawning occurs between late June and mid-October. Pink salmon spawn in coastal streams and rivers, some longer, and may spawn in the intertidal zone or at the mouth of rivers and hyporheic freshwater is available. Using its tail, the female digs a trough-shaped nest, called REDD (Scandinavian word for "nest") in the gravel of the stream bed, where she deposits eggs. As she expels the eggs, she is approached by one or more men who impregnate them as they fall into the REDD. Subsequently, the female covers the newly deposited zygotes, again jarring her tail against the gravel at the top of the REDD.

The female lays eggs in 1000-2000 a number of links within the REDD, often fertilized by different men. Females guard their redds until death, which comes within days of spawning. In dense populations, a major source of mortality for the embryos is superposition of redds by later-spawning fish. The eggs hatch from December to February, depending on water temperature and the youth from the gravel in March and April and quickly migrate downstream to estuaries in approximately one quarter ounces. The fish reach sexual maturity in their second year of life. They return to fresh water in the summer and fall as two years old adults. Pink and [Chum Salmon] sometimes crosses in nature to the hybrid known as Miko salmon form the infertile hybrids.

Pink salmon are cold water fish with a preferred temperature range of 5.6 to 14.6 ° C, an optimum temperature of 10.1 ° C, and an upper incipient lethal temperature of 25.8 ° C. The species is native to the Pacific and Arctic coastal waters of the Sacramento River in northern California to the Mackenzie River in Canada, and in the west of the Lena River in Siberia to Korea. Populations occur in Asia as far south as Hondo Island in Japan. Pink salmon were introduced into the Great Lakes region, including Iran.

The pink salmon is critical danger in California, Washington and danger. In Alaska and British Columbia are safe. They were introduced in the Great Lakes. The range of the pink salmon is the north-eastern Pacific Ocean from the North American coast.

Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Salmoniformes
Family: Salmonidae
Genus: Oncorhynchus
Species: O. gorbuscha