Salmon Traveling Upstream
The salmon s ability to swim up waterfalls is actually based off salmon leaping into and above waterfalls in the real world so they can get to the streams they were born in. Explore and learn encounter tap or click animated objects as they float down the river to learn about salmon maybe even find more fish to join you on your journey to spawn.
Salmon also spawn in rivers because in the real world in autumn salmon travel upstream returning from the ocean to the streams where they were born to lay eggs.
Salmon traveling upstream. They cease feeding during the run. Keta is a smaller fish averaging about 8 pounds with pale to medium colored flesh and a lower fat content than other salmon. Chinook and sockeye salmon from central idaho must travel 900 miles 1 400 km and climb nearly 7 000 feet 2 100 m before they are ready to spawn.
The males also develop hooked snouts to the point of sometimes overlapping the lower jaw and certain species develop humps on their backs. Salmon often have to navigate fish ladders in dams and other human created obstacles along the way. Rick taylor director of beaty biodiversity museum and professor of zoology ubc shows us some of the 12 000 salmon in the 2 km long hansen creek.
The females also change in color but not to such brilliant shades. Most salmon used for food are caught in the ocean where they have the best flavor color and texture before they start upstream. Ga image salmon change their physiology before entering fresh water.
After growing considerably in size they return to the same river where they were born using chemical cues and battle their way upstream to the spawning areas the idea being that if the area was good enough for them it will be good enough for their offspring. As the salmon travel upstream they undergo color changes. In the case of atlantic salmon salmo salar populations in britain they migrate to the seas around greenland where they normally spend one to two years.
Salmon right before entering their stream. Dave blackey getty images. Guide your salmon upstream to spawn and help them make important decisions and avoid dangerous obstacles along the way.
Every four years millions of sockeye salmon journey thousands of miles from the ocean back to their native spawning grounds in canada s fraser river. Then salmon begin the demanding trip upstream home to spawn. The run up the river can be exhausting sometimes requiring the salmon to battle hundreds of miles upstream against strong currents and rapids.
Migration is extremely difficult. In the ocean their bodies tend to dehydrate in the seawater. The males silvery colors transform into brilliant colors probably to attract females.
To prepare for the long distance journey salmon spend time at the mouths of the rivers where they smolted to feed and readjust to fresh water. Chum oncorhynchus keta is also called dog salmon for its dog like teeth keta comes from its species name and is a way to get away from the negative association chum sometimes has.
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