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The image depicts the life cycle of a salmon with illustrations and labels from upper river (slow moving) to open sea, each stage has an approximate timeline – upper river stage lasts approx. 3-6 months with reeds, small stones, and salmon eggs elements; lower river (fast flowing) stage lasts approx. 4 years, and open sea stage lasts approx. 5 years. The salmon's growth is represented at three stages: 'fry' measuring 3-5cm, 'smolt' measuring 12-15cm, and 'adult salmon' measuring 70-76cm. Each stage is represented by a number from 1 to 3 correlating to a pictorial symbol of the salmon's growth.
Given the complexity of the image, the above description may not be entirely accurate.
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The diagrams depict the evolution of a particular aquatic breed called the salmon.
Overall, salmon start their lives as eggs in the upper river and mature into adult fish swimming in the open sea.
To begin with, the first diagram shows the beginning of the salmon’s life. Adult salmon lay their eggs in the upper river underneath reed plants. Salmon offspring are the size of small stones and take 5-6 months to hatch. Subsequently, the newborn salmon are called fry.
Furthermore, the fish move to the lower river and live there for 4 years. During this period, they develop into bigger fish known as smolt and grow up to 12-15 cm. Smolt salmon migrate to the open sea and live there for 5 years. These fish grow into adult salmon that can reach 70-76 cm.
In conclusion, when the breeding season begins, the salmon proceed to the lower river and the cycle resumes.
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