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The image displays the life cycle of salmon with illustrations and text for each stage. It begins with "1) egg," which occurs in the upper river spawning grounds, eggs buried in small nests, and takes 2-3 months. The next stage is "2) alevin," tiny salmon with egg sacs, which develops in the same location and takes 1-2 months. Then "3) fry" are depicted, small salmon with yolk sacs absorbed, 5cm in size, in the lower river growing grounds, taking 2-4 years. The stage of "4) smolt," salmon transitioning to salt water, is 15cm in length and is found in the open sea for 1-8 years. Finally, "5) adult salmon," which are 70-85cm in size, return to the upper river spawning grounds after 1-5 years in the open sea.
Given the complexity of the image, the above description may not be entirely accurate.
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The diagram illustrates how salmon grow up among the river and sea. Overall, it is clearly seen that the entire process is a life cycle divided into three main stages, starting from small salmon called ‘fry’, growing to medium size – smolt, until it becomes a fully developed salmon.
The life cycle begins with salmon eggs being laid near small stones and reeds in a slow-moving upper river. It takes about 5 to 6 months to become a small fish, or fry, which has a 3-8 cm length. Four years later, it moves to the lower river, which has a rapid water flow, until the fry develops into the smolt, which is approximately 12-15 cm long.
It moves again to the open sea after about 5 years and fully develops into the adult salmon – 70-76 cm in length – before it goes back to its birthplace in the upper river to start mating and lay eggs. It can be seen that the salmon changes its habitat depending on its age.
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