Amphibian thread
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18-12-2014, 05:48 PM (This post was last modified: 18-12-2014 07:38 PM by Metazoa Zeke.)
Amphibian thread
You guys are getting corny without any zoology threads (accept FC,he has done good). There won't be much as I am typing this on my xbox 360. So I will just list some notes I wrote down on amphibian reproduction.

Amphibian reproduction is imposed by habitat,size,reproductive mode, and parental care practices

Amphibian spermatogenetic cycles are completed in the testes

Anurans and most of Caudata have a ovoidal structure, while some caudata and all Gymnophoina are composed of lobes. These lobes may increase with age in caudata and grow until maturity in gymnophonia

Each lobe is characterized by the presence of dialated lobules during spermatogenesis. Gymnophoina have lobules that contains different sperm cells during its stages of maturation.

In a single lobule, clusters of cells may range from primary spermatogina to maturing spermatids.

Well that is it for the day. This is a learning thread, so post some facts if you can.

[Image: Gladiator_frog.jpg]

EDIT: SneakinTongue

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18-12-2014, 07:31 PM
RE: Amphibian thread
Thanks Zeke, here have a Life Family Tree

[Image: 1670898-slide-0-evo-large.jpg]

http://www.sciencealert.com/here-s-the-t...ee-of-life

“I am quite sure now that often, very often, in matters concerning religion and politics a man’s reasoning powers are not above the monkey’s.”~Mark Twain
“Ocean: A body of water occupying about two-thirds of a world made for man - who has no gills.”~ Ambrose Bierce
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18-12-2014, 07:37 PM
RE: Amphibian thread
(18-12-2014 07:31 PM)Full Circle Wrote:  Thanks Zeke, here have a Life Family Tree

[Image: 1670898-slide-0-evo-large.jpg]

http://www.sciencealert.com/here-s-the-t...ee-of-life

Thanks. I can sneak the computer for now so I might add a picture.

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18-12-2014, 08:11 PM
RE: Amphibian thread
Rana sylvatica, a wood frog common to much of North America, undergoes a form of cryogenic hybernation.

[Image: Wood_Frog_15.jpg]

Quote:The frog becomes hard and crunchy. "When you drop it, it goes 'clink,'" Storey said.

Quote: In the lab, Storey said, ice thaws in about 20 minutes and the heart takes another 20 or 30 minutes to start.

"Once the heart starts, it pumps the blood around the animal and the animal starts to revive, then it starts to gulp, then it starts to breathe, then it starts to hop away. So it takes a little while to reactivate after you've been frozen down," he said.

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Flesh and blood of a dead star, slain in the apocalypse of supernova, resurrected by four billion years of continuous autocatalytic reaction and crowned with the emergent property of sentience in the dream that the universe might one day understand itself.
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18-12-2014, 08:14 PM
RE: Amphibian thread
(18-12-2014 08:11 PM)Paleophyte Wrote:  Rana sylvatica, a wood frog common to much of North America, undergoes a form of cryogenic hybernation.

[Image: Wood_Frog_15.jpg]

Quote:The frog becomes hard and crunchy. "When you drop it, it goes 'clink,'" Storey said.

Quote: In the lab, Storey said, ice thaws in about 20 minutes and the heart takes another 20 or 30 minutes to start.

"Once the heart starts, it pumps the blood around the animal and the animal starts to revive, then it starts to gulp, then it starts to breathe, then it starts to hop away. So it takes a little while to reactivate after you've been frozen down," he said.

This is very cool. I knew about frogs like this, but I did not know the species.

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18-12-2014, 08:20 PM (This post was last modified: 18-12-2014 09:05 PM by ghostexorcist.)
RE: Amphibian thread
This is my 2,000th post. Hurray! ...

I took a 400-level biology course on Herpetology my sophomore year in college. We had to memorize the names and basic information of 88 different species of salamanders, newts, frogs, toads, turtles, and snakes native to Southwest Ohio. It was a daunting task, but an interesting one. I came to appreciate, especially, frogs and salamanders because their permeable skin sets them up as an early warning system for disturbances in the ecosystem. If something, say a chemical, is released, amphibians are usually the first to go. They are a keystone species, meaning that their disappearance will have an adverse chain reaction on all other species all the way up to apex predators.

Two of the neatest things that I learned are: 1) Male frogs exposed to the herbicide Atrazine are slowly turned into females who can lay viable eggs; and 2) when nutrients are low, frogs and salamanders can chose to become cannibals and change their bodies to accommodate larger prey. This change includes a restructuring of the jaw, a widening of the mouth, enlarging of the head, and, in frogs especially, the lengthening and increase of vomerine teeth.

This influenced this story idea.

http://www.thethinkingatheist.com/forum/...Story-Idea
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18-12-2014, 08:40 PM
RE: Amphibian thread
The Strange Tale of a New Species of Lizard

Excerpt:

"These findings led scientists to a hypothesis for how these strange species came about: Sometimes individuals from two different species of whiptail lizards interbreed, and their hybrid offspring carry two different sets of chromosomes.

Somehow, this triggers a switch to parthenogenesis. The female hybrids start to produce clones distinct from either parental species. In other words, they instantly become a new species of their own.

But it gets even more bizarre. Some species of whiptail lizards carry three sets of genes, rather than two.”

http://www.nytimes.com/2014/12/18/scienc...izard.html

“I am quite sure now that often, very often, in matters concerning religion and politics a man’s reasoning powers are not above the monkey’s.”~Mark Twain
“Ocean: A body of water occupying about two-thirds of a world made for man - who has no gills.”~ Ambrose Bierce
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18-12-2014, 08:57 PM
RE: Amphibian thread
(18-12-2014 08:40 PM)Full Circle Wrote:   Lizard

Now we are getting very technical.

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18-12-2014, 09:06 PM
RE: Amphibian thread
(18-12-2014 08:57 PM)Metazoa Zeke Wrote:  
(18-12-2014 08:40 PM)Full Circle Wrote:   Lizard

Now we are getting very technical.

I figured if anyone would appreciate the article it would be you my young Jedi.

“I am quite sure now that often, very often, in matters concerning religion and politics a man’s reasoning powers are not above the monkey’s.”~Mark Twain
“Ocean: A body of water occupying about two-thirds of a world made for man - who has no gills.”~ Ambrose Bierce
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18-12-2014, 09:14 PM
RE: Amphibian thread
(18-12-2014 09:06 PM)Full Circle Wrote:  
(18-12-2014 08:57 PM)Metazoa Zeke Wrote:  Now we are getting very technical.

I figured if anyone would appreciate the article it would be you my young Jedi.

Well I said that because technical meaning that amniotes are amphibians.

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