Скачать или смотреть From salmon eggs to fry - the early life cycle

Over winter, salmon lay their eggs in gravel beds in rivers, called redds. Over the next few months, protected by the gravel and supported by oxygen-rich water the eggs develop, hatching in spring into fry with a yolk sac attached, called alevins.
The alevins spend a further week or two hiding in the gravel, growing and absorbing the nutrients from the yolk sac. When this has been exhausted, they begin to emerge from their redds as fry, ready to start feeding and growing. Survival is the name of the game, with a myriad predators and other dangers lurking. Already the fry are well camouflaged and starting to develop the parr marks evident in older fry, called parr.
These fish have an epic life story, that will take them from the cool, sheltered waters of their native stream to the wild deeps of the North Atlantic, possibly as far away as Greenland, before returning as adults to their native river to spawn.
As the year goes on, we hope to document more of the life cycle, finishing with adult salmon spawning in winter. Subscribe to our channel for updates!

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