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-   -   Paper of interest (http://www.caudata.org/forum/f1173-advanced-newt-salamander-topics/f30-species-genus-family-discussions/f42-plethodontids-lungless-salamanders-bolitoglossa-eurycea-plethodon-etc/58479-paper-interest.html)

Kevin Z 4th December 2008 19:48

Paper of interest
 
1 Attachment(s)
hi all, I thought some might be interested in the attached paper (it's the second note in the paper, not the first).

cheers, Kevin

John 4th December 2008 19:58

Re: paper of interest
 
Hi Kevin,

Thanks for sharing this. I've moved this thread to the Plethodontid section of the forum.

Best wishes,

-John

taherman 4th December 2008 20:24

Re: Paper of interest
 
I'd have to say most surprising to me is the bit at the end, where they successfully raised eggs from Plethodon underwater...

Kevin Z 4th December 2008 21:38

Re: Paper of interest
 
hey Tim, (thanks for this paper, by the way!). yup, that was surprising about raising the terrestrial eggs underwater. I have seen other species with eggs on the waterline that could go either way, provided sufficient oxygenation of the water (Theloderma, mantellas, some Tylototriton/Echinotriton, hylids, etc.). but woodland salamanders? crazy. I also sent the paper to some Eleutherodactylus guys, some of whom are having trouble with eggs, especially when they remove them. I bet a motivated, technically handy individual such as yourself could make their own automated flow-through egg washers for less than $650...maybe a 'hydroponic'-like system with ebbing and flowing water...
cheers

Quote:

Originally Posted by taherman (Post 171731)
I'd have to say most surprising to me is the bit at the end, where they successfully raised eggs from Plethodon underwater...


taherman 4th December 2008 23:19

Re: Paper of interest
 
Yeah I was checking out their website, looks like they just use vinyl coated fiberglass screens to set the eggs on, hard to see what the water flow is like from the photos though. Maybe we'll have enough Hemidactylium eggs this spring to do some experimenting.

Welcome to Caudata.org! Looks like the Aark fundraising drive is going pretty well, whichever party initiated, it was a great idea. Thanks for reminding me about that paper...one of the references in it uses LHRH on Gyrinophilus successfully, I may have to try that on one of our display P. ruber with years of retained eggs.

-Tim

Kevin Z 5th December 2008 04:04

Re: Paper of interest
 
another one you might be interested in:

Cameron, C., S. Beug and C. Tsilfidis. 2004. Captive breeding of Notophthalmus viridescens through Hormonal manipulation. Herpetological Review. 35 (3):257-259.

we used the technique with some success on the same species in the NACC. it didn't scale up to Andrias though! if memory serves, it involved HCG.

rust 5th December 2008 11:46

Re: Paper of interest
 
Very interesting article. But I find the use of the term "most" for P.jordani vague. My experience with Ensatina and Aneides is that excessive moisture late in development causes premature hatching and death. Though I'm going to have to ponder the possibility of trying this, at least once.

taherman 5th December 2008 15:12

Re: Paper of interest
 
Quote:

My experience with Ensatina and Aneides is that excessive moisture late in development causes premature hatching and death.
That was my experience with the D. aeneus eggs too, and I've seen rain trigger hatching in Hemidactylium. However the eggs may reach some sort of osmotic balance early in development and it's the sudden change that triggers hatching. Dunno.

-Tim

ozarkhellbender 28th January 2011 15:43

Re: Paper of interest
 
I know I'm getting in here kind of late, but I used to work at a fish hatchery and they used a technique that might prove equally as helpful. They had long acrylic cylinders filled with water and they would run a stream of water up from the bottom of the cylinder. The current would gently roll the eggs to keep them oxygenated and clean. They are pretty easy to make, you could even use a large mason jar. I would think you could use a large, fine air stone in the bottom of the jar to keep the water flowing and keep it well oxygenated. Anyway, thank you posting this paper, I found it very interesting.


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