Welcome to Omgili,
Omgili ( Oh My God I Love It ;) is a search engine for discussions. With Omgili you can find answers and solutions, debates, discussions, personal experiences, opinions and more... To learn more about Omgili click here.
This is a complete preview of the discussion as it was indexed by Omgili crawlers. Use this preview if the original discussion is unavailable.
Click here to view the original discussion.
 |
|
 |
|
piranha only use eyesight in the home aquarium - Piranha-Fury Forums
In the wild piranha live in either whitewater or blackwater.
Both types are very very opaque.
You can't see your hand in the water if it is 1 foot away.
The rely on their nose and lateral line to guide them.
In the home aquarium they have an extra bonus, they can see.
Perfectly obvious, but some people just don't think about it.
|
|
 |
|
 |
|
|
|
|
Makes alot of sense.
But I didn't think the water was THAT murky.
|
|
|
|
|
|
|
|
|
There are regions that arnt black water or white water.
If they didnt need them at all they would most likly evolve and loose them (example blind cave tetra)
|
|
|
|
|
|
|
|
|
Yes it is. Blackwater is actually clearer than white.
White water looks like coffee with lots of creme.
Black water is dark brown just like iced tea.
Most parts of the amazon in iquitos peru where most of our fish are caught is so muddy you sink to your knees in mudd.
It is hard to walk and you must be barefoot.
Your shoes would get sucked off by the mudd.
|
|
|
|
|
|
|
|
|
Ive often thought about that.
Sometimes I get paranoid if every piece of food isnt consumed and I wonder if my fish realize that there are bits and pieces in the tank that they cant see...
|
|
|
|
|
|
|
|
|
A clear water tributary would be the only non white water/black water.
Piranha are not found in this type of water.
They stay in blk or white water almost always.
Although books say there are more fish species in white water habitats, I would agree, but there are more "Piranha sspecies" in black water.
Personal experience.
Serras seem to prefer black and pygos are usually in white water in nature.
This post has been edited by weerhom : Sep 22 2009, 08:37 PM
|
|
|
|
|
|
|
|
|
Quote: yes it is.
Blackwater is actually clearer than white.
White water looks like coffee with lots of creme.
Black water is dark brown just like iced tea.
Most parts of the amazon in iquitos peru where most of our fish are caught is so muddy you sink to your knees in mudd.
It is hard to walk and you must be barefoot.
Your shoes would get sucked off by the mudd.
Yes, white water is just lots of free floating sediment.
Back water is like iced tea.
Also, not all p's are from black of white water.
From opefe regarding mannies:
"*From Frank Magallanes: There appears to be contradiction between Winemiller and the fishermen on the type of water being either black or clear water.
According to my research with a well known scientist from that region;
It is really clear waters, but acid as they found in Aguajales or morichales, is not black water.
The problem with the term white water, according to this expert, is that name is used to define water with lot of sediment load such as the Apure or Orinoco River.
"
So does that mean im 1/1 in proving you wrong?
If what you said were true, there would be no vids of wild p's as the camera couldnt even see them.
There is some sediment and sometimes yellowing (dilute black water), but its fare from never being able to see a hand right in front of you.
Sure the water isnt perfectly clear all the time, but.
"You can't see your hand in the water if it is 1 foot away" isnt true.
You can see a distance in the water.
You cant really expect the water to be like a swimming pool.
Point is, the water isnt perfectly clear, but its often clean enough to see, or at the very worst make out shadows.
one of many youtube videos
This post has been edited by sean-820 : Sep 23 2009, 05:39 PM
|
|
|
|
|
|
|
|
|
1st.... I swam in the amazon.
I could not see my hand in front of my face in blk or white water.
Nothing, zilch, zero, nada.
Could you see when you were swimming in the amazon?
I have swam in the amazon.
I have first hand experience.
I swam in the amazon.
Zilch, zero, nada!
No plant life below water...no light.
Plants were floating type because no light past the surface.
There are piranha in clear water, but no as numerous as blk and white water habitat.
No light penetration in white or black water.
You didn't prove me wrong.
2nd...
I believe most vid footage you see is staged.
I don't think piranha on the tv is wild footage.
I may be wrong about this, but probably not.
3rd....
Make sure you understand....you cannot see your hand in front of you face in the amazon
|
|
|
|
|
|
|
|
|
Quote: 1st.... I swam in the amazon.
I could not see my hand in front of my face in blk or white water.
Am is supposed to care where you swam?
Thats one place out of many, so you cant go about saying p's dont use their eyesight as 100% of water in south america is the same in which you may or may not of swam Nothing, zilch, zero, nada.
What about your logic?
Could you see when you were swimming in the amazon?
I have swam in lake ontario, so does that mean i know the water types in the entire continent?
I have swam in the amazon.
I have first hand experience Possibly first hand experience about the specific area, but based on this info you cant sayy all water in south america is like this .
I swam in the amazon.
Zilch, zero, nada!
No plant life below water...no light.
So then accoring to your logic if one place in south america has black water they all do then i guess you could say if that specific place had no submerged plants then there are no submerged aquatic plants in south america?
I like your logic.
One spot isnt always the same as the rest.
Plants were floating type because no light past the surface.
There are piranha in clear water, Your previous statement..."a clear water tributary would be the only non white water/black water.
Piranha are not found in this type of water" but not as numerous as blk and white water habitat.
No light penetration in white or black water.
You didn't prove me wrong.
Ok all just say that your statement that no p's live in water with visiblilty past a foot is incorrect.
First you say they arnt found in clear water, but now at least your admitting it so ill take that as yards gained.
I find the funniest thing is your saying documentry type (ex bbc) videos are staged.
2nd...
I believe most vid footage you see is staged.
I don't think piranha on the tv is wild footage.
I may be wrong about this, but probably not.
On what basis? Becasue you can see past a foot and you couldnt in the area you were in?
3rd....
Make sure you understand....you cannot see your hand in front of you face in the specific region i swam in.
I decided to help you out and fix your third point for you so your very welcome
|
|
|
|
|
|
|
|
|
Quote: 1st.... I swam in the amazon.
I could not see my hand in front of my face in blk or white water.
Nothing, zilch, zero, nada.
Could you see when you were swimming in the amazon?
I have swam in the amazon.
I have first hand experience.
I swam in the amazon.
Zilch, zero, nada!
No plant life below water...no light.
Plants were floating type because no light past the surface.
There are piranha in clear water, but no as numerous as blk and white water habitat.
No light penetration in white or black water.
You didn't prove me wrong.
2nd...
I believe most vid footage you see is staged.
I don't think piranha on the tv is wild footage.
I may be wrong about this, but probably not.
3rd....
Make sure you understand....you cannot see your hand in front of you face in the amazon
|
|
|
|
|
|
|
|
|
That reminds me of that SNL skit with will ferrell where he was sitting at the dinner table with his family and every time his daughter would question him, he would start screaming "i drive a dodge stratus...
I drive a dodge stratus"
|
|
|
|
|
|
|
|
|
Are you drunk? the second point is hillarious.
Most of if it is staged?
Have you ever seen killer instincts: piranha wolf in the water?
Or any of the recent shows on Ps on tv.
They are obviously not staged.
What was the point of this thread that piranha see better in aquariums with perfectly clear water?
|
|
|
|
|
|
|
|
|
LOL its staged...
AHAHHA
wheres the director
|
|
|
|
|
|
|
|
|
I dont know what happened to this thread.
What's the point we're arguing now?
|
|
|
|
|
|
|
|
|
Back ontopic. On a lot of points, there is truth in it.
Though I don't accept generalized conclusions.
Like someone allready mentioned : you've swom in a very little piece of the amazon.
On other points, you're simply wrong.
However, you missed one question : if you can't see, it MIGHT be save to suggest mankind can't see.
Believing your eyes are capable of good view and your brains are able to process the image, your view MIGHT be the one mankind in general will see.
That is NOT to be generalised to other species.
Personnaly, I can't spot a mouse from 10 miles high.
Hawks can.
So if mankind can't see, that does not mean fish can't.
So what made you conclude piranhas can't see, because you can't ?
They have different eyes than us and a different communication in the brain to process the images....
|
|
|
|
|
|
|
|
|
I don't agree with the theory of "piranhas only use their eyes to see in the home aquarium." It just goes against all the rules.
Trust me, if piranhas were a specie that never utilized their eyes as a safekeeping function, they would have evolved without certain parts of the retinas or the eye as a whole.
I would tend to think the rods and or cones, lens, retina, etc.
Of the piranhas from this specific region may have a somewhat different makeup than say piranhas from clearer water, but trust me, they use their eyes....
You can almost prove the fact that they are evolutionary subjected to darker, muddier waters by the fact that they do not necessarily enjoy bright lighting
Just because you were unable to see 1 foot in front of you in the amazon river doesn't substantially prove anything.
A our eye construction is different from that of a fish and B you do not contain other sensory receptors that a fish does.
This post has been edited by roccov12345 : Sep 24 2009, 08:19 AM
|
|
|
|
|
|
|
|
|
I would add more, but this thread is funny.
Life is a banana boat.
You can either eat it or tax it.
|
|
|
|
|
|
|
|
|
Quote: :laugh: I would add more, but this thread is funny.
oh come on frank, join in on the fun...
|
|
|
|
|
|
|
|
|
Quote: :laugh: I would add more, but this thread is funny.
Frank...
vote for this site on Aquarank
"A severed foot is the ultimate stocking stuffer".
"My belt holds my pants up, but the belt loops hold my belt up.
So which one is the real hero?"
"I wear a necklace, cause I wanna know when I'm upside down."
~Mitch Hedberg
CODE I want to experience playing with another member.
-RHOMZILLA
|
|
|
|
|
|
|
|