ScienceMan Digital Lesson - Biology - Fish Ladders

ScienceMan.com provides free digital lessons and technology integration help for teachers and students. In this digital lesson, ScienceMan discusses the challenges faced by migrating fish and how technology is used to help fish overcome the dam obstacles in rivers. ScienceMan™ and ScienceMan Digital Lessons are protected by copyright. All rights reserved.

[@rowanphillips3497]

I only just learned about the existence of fish ladders. Very cool. thanks for the info.

[@AnotherAmateur]

Very nice. I'm glad to see that modern dam builders are helping migrating fish instead of just creating a water storage and electricity generating structure. I made a vid of the Chinook salmon using a fish ladder on a California river. Hope you'll watch it sometime. Thanks for an informative video!

[@pomelo70350165]

Very nice vid! thx man

[@Dr3amking]

Very interesting, good job

[@strenuousbobbykushner]

An informative video!!

[@ilberarda]

thank you very much ..

[@huyked]

Wow, that was really informative. I have never seen the S-pattern ladder, nor the fingerling transport. Thanks! Hopefully if aliens ever visit us, they'll see things like this and spare us our lives. :P hahaha ;)

[@huyked]

@@waibryte
That's the spirit. Taking one for the team. Thank you for being the blood offering.

[@huyked]

@@waibryte
Haha. ;)
I know, right? Dang. I can't believe my comment is 9 years old. Thanks for bringing me back to it.

[@huyked]

@@waibryte
You were looking through RUclips doing research on a fish gun?

[@huyked]

@@waibryte
Ah, well, even though I'm not a vegetarian anymore, damn, I don't find killing anything funny. To each their own. :P Haha

[@huyked]

@@waibryte
You kind of lost me there. Don't know what you were looking into.

[@MatthewHedgesEntertainment]

Are fish ladders commonplace for most dams or are they only being implemented in certain areas?

[@Science_Man]

Good question - fish ladders are used only at certain dams where biologists have determined there is a need (in a fish migration path) and where there is a reasonable chance they will be effective. Unfortunately, sometimes, even with very careful design, fish ladders can fail because they do not match closely enough the natural experience of the fish.

[@MatthewHedgesEntertainment]

@@Science_Man Makes sense, thank you for the reply! :D

[@Thomas-hx3pr]

Which cake first the fingerling chute or the migration ladder? I get the sense that the fingerlings were more important to the engineers since they pose a risk to the turbines.

[@Science_Man]

That's an excellent question. I'm not sure... I will have to do some research into that to find out.

[@mandarkokate5613]

It's good that some humans helping those fishes to breed but they have to change their pattern of survival sound like punishment

[@Lure-Benson]

The first Salmon is a Chinook salmon

[@RED_king_98]

I have a suggestion for it. Can we use tesla value rather than that steps because for migrating fish like eel it could be useful

[@coopercharoonsmith6051]

Cool

[@ThumbsOnly]

I just learned about this ladder on PBS kids

[@maksimtroll2290]

What if the fish jump backward

[@wilson0408]

Any clearer version of the image showing the fingerling transport system beneath the dam?

[@gsilverfish]

How do the fish ladders address the problem of predatory pressure? Isn't think just creating an even smaller chokepoint for predators to take advantage of?

[@Science_Man]

Very good point. It is true fish ladders can cause hotspots for predation. This requires more study for both the types of predation that result, and how new fish ladder designs might mitigate the problem.

[@shaibmanzoor7650]

I think we need to educate the fish next

[@billbot4842]

i don't think that's a sockeye

[@aaronspencer7404]

That's a Chinook not sockeye just fyi

[@rosamacias3520]

Cool