Posts Tagged ‘jumping

23
May
17

Whale breaching off Kruzof Island (Alaska)…

“Fiction was invented the day Jonas arrived home and told his wife that he was three days late because he had been swallowed by a whale.”    Gabriel Garcia Marquez

Alaska-Kruzof Is.-Whale Jump-SwittersB

This whale jumped a good have dozen times & moved parallel to us, moving in the opposite direction.

07
Jun
16

Whale does the backstroke…

whale jumping-Alaska-SwittersB

09
Feb
13

Salmon Leaping: How Do They Do That?

Salmon-Waterfall1So in light of my last post about fish above waterfalls or natural barriers: so how do they jump up those waterfalls?

“Good leaps depend on the pool below the falls. The deeper the pool, the better the take-off angle, and the faster the fish can go. Consequently, “the higher the fish can leap,” says education coordinator Jonathan Lyman of the Alaska Department of Fish and Game.

Also, water falling from a ledge above hits the water surface below, and continues to plunge deep below the surface. Then — under pressure from more plummeting water — the water rushes back up to the surface. The continuing falling water acts as a hydraulic jack, squeezing the water back up to the surface. Fish use the “hydraulic jump” water to boost their initial leap, says Webb.

Among Pacific salmon, Lyman says, Coho and steelhead (rainbow) trout are the best leapers because they seek the high river source to spawn. The chum salmon is the poorest leaper. The Atlantic salmon is the best leaper of all salmon.” (source)

Water depth of the pool below the falls and the hydraulic push of the plunging water back upward combine to propel the determined fish.




Below @ “The Past” you can search back to 2008 month by month

August 2019
M T W T F S S
« Jul    
 1234
567891011
12131415161718
19202122232425
262728293031  

Please visit MUNCY DESIGNS (click)

Welcome to SwittersB & Exploring. Please Share, Comment & Like Away!

Please subscribe just below. Use the Search box to search topics.

Enter your email address to subscribe to the SwittersB blog and receive notifications of new posts by email.

Join 4,025 other followers

The Past

231!!! Countries Visiting SwittersB~Thank You!!!

free counters

Blog Stats: There are lies, damn lies and statistics

  • 4,663,909 Visits/Views (WP Original Stat~Pre Flag Counter Stats)

%d bloggers like this: