Fish with a pelvis...

Go down

Fish with a pelvis... Empty Fish with a pelvis...

Post by Kaere on Mon Mar 28, 2016 10:02 am

http://www.cbc.ca/news/technology/walking-fish-1.3507464

It's a fish that swims, but one that can also walk like a land animal and is built like no other fish on Earth.

The blind, waterfall climbing cavefish Cryptotora thamicola is a distant relative of pet goldfish. It lives in fast-flowing streams and waterfalls in caves in Thailand. And its claim to fame is the unusual way it uses two front fins and two back fins to pull itself up steep rocks and waterfalls as the water rushes over them.

"They have fin structures unlike any fish that I have ever seen anywhere," said Brooke Flammang, a biologist at the New Jersey Institute of Technology who led the new discovery, in a YouTube video showing how the fish moves.

"They are able to climb up rock faces in very much the same way that salamanders do. From an evolutionary perspective, this is a huge finding."

The fish doesn't push itself with its tail using the side-to-side movements that other fish like mudskippers and climbing perch use when "walking" on land.

Instead, it plants and moves its fins the way four-legged vertebrates such as amphibians, reptiles and mammals —  known together as tetrapods — plant their feet.

When Flammang and her colleagues looked at the cavefish's anatomy to see how it was able to do this, they were surprised — the fish's skeleton had adaptations for walking that have never been seen in a fish.

"The pelvis and vertebral column of this fish allow it to support its body weight against gravity and provide large sites for muscle attachment for walking," Flammang said in a news release.

Among its unique features was a bony connection between its pelvis and backbone. That's something other "walking" fish don't have, but tetrapods do.

Researchers know that the cavefish isn't related to the fishy common ancestor of all tetrapods because that ancestor had multiple digits or fingers on each of its limbs, and the cavefish doesn't.

But they say their discovery shows that fish have the innate ability to evolve a pelvis. That may also explain why some fossil track ways from a four-legged, walking animal have been found that are older than the oldest animal with multiple digits on its limbs.

The researchers published their discovery in the journal Scientific Reports.
Kaere
Kaere

Posts : 28334
Join date : 2014-06-09

Back to top Go down

Fish with a pelvis... Empty Re: Fish with a pelvis...

Post by Agartha on Mon Mar 28, 2016 11:07 am

Very cool! Evolution in progress.......
Agartha
Agartha
Admin

Posts : 15059
Join date : 2014-06-10
Location : Behind you.

Back to top Go down

Fish with a pelvis... Empty Re: Fish with a pelvis...

Post by Stargate on Mon Mar 28, 2016 12:31 pm

Positive and negative evolution, everything is possible/impossible.

Stargate

Posts : 2013
Join date : 2014-06-14

Back to top Go down

Fish with a pelvis... Empty Re: Fish with a pelvis...

Post by Rogue on Tue Mar 29, 2016 7:20 am


Cool looking too! Very Happy
Rogue
Rogue

Posts : 23095
Join date : 2014-06-12
Location : Wild West

Back to top Go down

Fish with a pelvis... Empty Re: Fish with a pelvis...

Post by Solace on Tue Mar 29, 2016 8:51 am

Very Happy Cool fishy!
Solace
Solace

Posts : 4337
Join date : 2014-06-13
Location : Within the music...

Back to top Go down

Fish with a pelvis... Empty Re: Fish with a pelvis...

Post by Agartha on Tue Mar 29, 2016 8:57 am

@Stargate wrote:Positive and negative evolution, everything is possible/impossible.

In which way is negative, Star?
Agartha
Agartha
Admin

Posts : 15059
Join date : 2014-06-10
Location : Behind you.

Back to top Go down

Fish with a pelvis... Empty Re: Fish with a pelvis...

Post by Lenzabi on Tue Mar 29, 2016 2:27 pm

now this make me think of a new term for use as an exclammatory: "Oh fish hips!"

_________________
Warning!: Those who knock on Dragon's doors un-announced may be flame broiled, unless they bear chocolate/wine, or good foods
Fish with a pelvis... Div20a11
Once they have tried scales, everything else pales! Twisted Evil
Lenzabi
Lenzabi
Admin

Posts : 2325
Join date : 2014-06-11
Age : 55
Location : Earth

Back to top Go down

Fish with a pelvis... Empty Re: Fish with a pelvis...

Post by Stargate on Tue Mar 29, 2016 3:10 pm

@Agartha wrote:
@Stargate wrote:Positive and negative evolution, everything is possible/impossible.

In which way is negative, Star?

Ags, the easiest way I can explain this is that everything goes both ways, it just depends on how you want to see it.
The fishes have for some reason to step down, instead of up, in terms of evolution.

Stargate

Posts : 2013
Join date : 2014-06-14

Back to top Go down

Fish with a pelvis... Empty Re: Fish with a pelvis...

Post by Rockhopper on Tue Mar 29, 2016 4:00 pm

Cool fish. Good find Ka.

Tim.
Rockhopper
Rockhopper

Posts : 4282
Join date : 2014-06-13
Age : 75
Location : Island Paradise

Back to top Go down

Fish with a pelvis... Empty Re: Fish with a pelvis...

Post by Kaere on Tue Mar 29, 2016 6:18 pm

@Lenzabi wrote:now this make me think of a new term for use as an exclammatory: "Oh fish hips!"

Ha!!! Razz
Kaere
Kaere

Posts : 28334
Join date : 2014-06-09

Back to top Go down

Fish with a pelvis... Empty Re: Fish with a pelvis...

Post by Lenzabi on Wed Mar 30, 2016 8:58 am

@Kaere wrote:
@Lenzabi wrote:now this make me think of a new term for use as an exclammatory: "Oh fish hips!"

Ha!!! Razz

Oh fish hips! Razz Razz Razz Razz

_________________
Warning!: Those who knock on Dragon's doors un-announced may be flame broiled, unless they bear chocolate/wine, or good foods
Fish with a pelvis... Div20a11
Once they have tried scales, everything else pales! Twisted Evil
Lenzabi
Lenzabi
Admin

Posts : 2325
Join date : 2014-06-11
Age : 55
Location : Earth

Back to top Go down

Fish with a pelvis... Empty Re: Fish with a pelvis...

Post by Rockhopper on Thu Mar 31, 2016 6:45 pm

Rockhopper
Rockhopper

Posts : 4282
Join date : 2014-06-13
Age : 75
Location : Island Paradise

Back to top Go down

Fish with a pelvis... Empty Re: Fish with a pelvis...

Post by Stargate on Thu Mar 31, 2016 7:18 pm

So many interesting things on our planet.

Stargate

Posts : 2013
Join date : 2014-06-14

Back to top Go down

Fish with a pelvis... Empty Re: Fish with a pelvis...

Post by Sponsored content


Sponsored content


Back to top Go down

Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum