Salmon Breed

Salmon is a kind of sea fish from the Salmonidae family. Other fish that one family with adlaah salmon trout. The difference is that the migration of salmon life compared to trout living. Salmon living in the Atlantic Ocean and the Pacific Ocean.

In general, salmon are anadromous species, ie species that migrate to breed. Salmon was born in the waters of fresh water, migrate to the ocean, then return to freshwater to reproduce. There is a belief that the salmon is always returned to the same place where he was born to breed. Research shows that, but the reason why it happened and how the salmon can save the memory is still a mystery.
Life cycle

Salmon returned to the waters of the rushing fresh water to breed. Navigation methods that do may be done with the fish smell. Half of the adult salmon will die within a few days to weeks after breeding.

To put the eggs, the female salmon tail flap to create a low pressure area to pick up gravel in order swept away, creating a gap for him to put the eggs. A gap can accommodate 5000 eggs, cover an area of about 2.8 m2. Egg color varies from orange to red. One or more salmon males and females will close out his sperm into the water to fertilize eggs.

The female salmon then cover the eggs with gravel and then swept off to lay their eggs elsewhere. Female salmon can do as many as seven times before the eggs in her ovaries out. Salmon will die within days after laying. Eggs should be placed under the gravel around the cold water with a good flow as the oxygen supply. High mortality is common in this stage, most of which occurred due predation and changes in water conditions from human activity.

The young salmon stay in freshwater waters are where they were born, for three years before migrating to the ocean. During this period, they are silvery. It is estimated that only 10% of the number of eggs that survived to reach this point.

Salmon spend one to five years before reaching the age of sexual maturity. Adult salmon will return to the place where he was born to breed.

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Ditulis oleh: Blogger - 19/02/13