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The image contains a sequence diagram detailing the life cycle of a salmon, divided into three primary stages. The initial stage illustrates eggs laid in freshwater areas, specifically rivers, with incubation durations of around 5 to 6 months before hatching. The second stage, spanning a timeframe of approximately 4 years, depicts juvenile salmon transitioning to freshwater habitat, noting their rapid growth over this period. The final stage highlights the mature salmon migrating to oceanic environments, where they grow further until they reach spawning maturity, approximately 5 years from their hatching. The process then repeats as mature salmon return to their breeding rivers to spawn. There is no additional numerical data presented.
Given the complexity of the image, the above description may not be entirely accurate.
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The diagram illustrates the life cycle of a particular fish, which is salmon. Overall, there are several different stages from being an egg to reaching adulthood in the open sea, which varies in size and occurs in three distinct environments.
Firstly, the salmon eggs reside in the upper river that has slow-moving water for around five to six months, the eggs lie under the reeds and are covered by small stones. Secondly, they hatch and are called fry, which measure for 3 to 8 centimetres long, staying in the lower river with fast-movement currents for approximately four years before moving to the open sea. Thirdly, they turn into a smolt that is 12 to 15 centimetres, which is generally larger.
The smolt migrates to the open sea where they live for about five years until they mature into adult salmon that reach a size of 70 to 78 centimetres long. Lastly, the adult salmon return to the upper river to reproduce the salmon eggs. This life cycle will be repeated continuously from phase one to three, from spawning to maturating.
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