Amphibian thread
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24-12-2014, 04:37 PM
RE: Amphibian thread
Some more on amphibians going through the mood.

Caudata have each individual locules contains sperm cells in the same stage of matureation, there is also a developmental gradient representing successive zones of spermatogania, spermatocytes, spermatids, and mature spermatozoa, anterior lobe is the least advance.

The structually simple testes of anurans increase in size and weight during spermatogenesis

Temperate anurans sperm cells mature uniformally, white tropical anurans contain sperm cells with various stages of maturation.

The termonation of the period of spermatogenesis is characterized by ohanges in the testes, like increase in interstitial tissue, disintergration of lobule stromata, degeneration of intralobular ducts, and the presence of only a few spermatocytes peripherally in the lobules.

Oogenesis is basically the same in all three extant orders of amphibians

The developing ova lie in follicles associated with the ovary

Primary oocytes undergo meiotic division to yield secondary oocytes and the first polar bodies.

I will use this thread to rant later.

[Image: Salamander.png]

More to comeDodgy

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24-12-2014, 04:47 PM
RE: Amphibian thread
(24-12-2014 04:37 PM)Metazoa Zeke Wrote:  [Image: Salamander.png]

More to comeDodgy

That thing is cuter than a lop-eared rabbit!

“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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24-12-2014, 04:54 PM
RE: Amphibian thread
(24-12-2014 04:47 PM)Full Circle Wrote:  
(24-12-2014 04:37 PM)Metazoa Zeke Wrote:  [Image: Salamander.png]

More to comeDodgy

That thing is cuter than a lop-eared rabbit!

His eyes look funny, as if he as seen some shit.

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24-12-2014, 05:52 PM
RE: Amphibian thread
(24-12-2014 04:37 PM)Metazoa Zeke Wrote:  [Image: Salamander.png]

That picture reminds me of a comic strip that I drew for the aforementioned herpetology class. I have to explain a few things in order for people to fully appreciate the strip. First, the principal's name "Bufo" is the genus name for the American Toad (Bufo americanus). The mother's name "Necturus" is the genus name for the Mudpuppy Salamander (Necturus maculosus). Second, the stuff the principal is saying about Billy not wanting to leave the pool, or his refusal to mature has to do with the Mudpuppy's biology. Being aquatic salamanders, they never leave the water for life on land. Because of this, they retain their childhood characteristic of external gills (that is what those purple things are on the sides of Billy's head). So, basically, even in their adult state, they look just like their children, only bigger. Therefore, Billy's refusal to mature can be taken as both his mental maturity level and his physical growth (that's nerd humor for you). Third, amphibians can become cannibals in environments with low food resources.

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24-12-2014, 06:10 PM
RE: Amphibian thread
(24-12-2014 05:52 PM)ghostexorcist Wrote:  
(24-12-2014 04:37 PM)Metazoa Zeke Wrote:  [Image: Salamander.png]

That picture reminds me of a comic strip that I drew for the aforementioned herpetology class. I have to explain a few things in order for people to fully appreciate the strip. First, the principal's name "Bufo" is the genus name for the American Toad (Bufo americanus). The mother's name "Necturus" is the genus name for the Mudpuppy Salamander (Necturus maculosus). Second, the stuff the principal is saying about Billy not wanting to leave the pool, or his refusal to mature has to do with the Mudpuppy's biology. Being aquatic salamanders, they never leave the water for life on land. Because of this, they retain their childhood characteristic of external gills (that is what those purple things are on the sides of Billy's head). So, basically, even in their adult state, they look just like their children, only bigger. Therefore, Billy's refusal to mature can be taken as both his mental maturity level and his physical growth (that's nerd humor for you). Third, amphibians can become cannibals in environments with low food resources.

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Did you get a good grade on it?

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24-12-2014, 06:31 PM
RE: Amphibian thread
(24-12-2014 06:10 PM)Metazoa Zeke Wrote:  
(24-12-2014 05:52 PM)ghostexorcist Wrote:  That picture reminds me of a comic strip that I drew for the aforementioned herpetology class. I have to explain a few things in order for people to fully appreciate the strip. First, the principal's name "Bufo" is the genus name for the American Toad (Bufo americanus). The mother's name "Necturus" is the genus name for the Mudpuppy Salamander (Necturus maculosus). Second, the stuff the principal is saying about Billy not wanting to leave the pool, or his refusal to mature has to do with the Mudpuppy's biology. Being aquatic salamanders, they never leave the water for life on land. Because of this, they retain their childhood characteristic of external gills (that is what those purple things are on the sides of Billy's head). So, basically, even in their adult state, they look just like their children, only bigger. Therefore, Billy's refusal to mature can be taken as both his mental maturity level and his physical growth (that's nerd humor for you). Third, amphibians can become cannibals in environments with low food resources.

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Did you get a good grade on it?

Yep, got an A.
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24-12-2014, 08:00 PM
RE: Amphibian thread
Freaky frogs
http://www.sciencebuzz.org/blog/mystery-freaky-frogs

Insufferable know-it-all.Einstein God has a plan for us. Please stop screwing it up with your prayers.
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24-12-2014, 08:08 PM
RE: Amphibian thread
(24-12-2014 08:00 PM)Bucky Ball Wrote:  Freaky frogs
http://www.sciencebuzz.org/blog/mystery-freaky-frogs

Did you here about the frogs that change their gender when exposed to a specific chemical?

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24-12-2014, 08:13 PM
RE: Amphibian thread
(24-12-2014 08:08 PM)Metazoa Zeke Wrote:  
(24-12-2014 08:00 PM)Bucky Ball Wrote:  Freaky frogs
http://www.sciencebuzz.org/blog/mystery-freaky-frogs

Did you here about the frogs that change their gender when exposed to a specific chemical?

I think I read about it. Either my uncle or one of my cousins had a class from the Professor at the U of M that discovered and studied the freaky frogs. I can't remember his name. I know he sat at a fund-raiser table with us once .. he was interesting.

Insufferable know-it-all.Einstein God has a plan for us. Please stop screwing it up with your prayers.
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24-12-2014, 08:16 PM
RE: Amphibian thread
(24-12-2014 08:13 PM)Bucky Ball Wrote:  
(24-12-2014 08:08 PM)Metazoa Zeke Wrote:  Did you here about the frogs that change their gender when exposed to a specific chemical?

I think I read about it. Either my uncle or one of my cousins had a class from the Professor at the U of M that discovered and studied the freaky frogs. I can't remember his name. I know he sat at a fund-raiser table with us once .. he was interesting.

Ghost posted it, but here is what I am talking about

http://www.livescience.com/10957-pestici...males.html

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