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North American Newts (Notophthalmus & Taricha) While not closely related, these two genera are the true newts of North America.

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Old 1st May 2010   #1
Will
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Default Female Taricha lays eggs again

So once agaiin, my female has laid eggs. Last year she laid alot, however they were unfertile. Here's the thread from last year http://www.caudata.org/forum/f1173-a...g-success.html I'm not sure if that is the case this time, but I think it may be. I just discovered one of the eggs yesterday and i removed the ones that I could find today. so far there is no development. They look like little white balls with brown on one side. Could someone tell me when I will start to see development?



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Old 1st May 2010   #2
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Default Re: Female Taricha lays eggs again

Anybody? What's the first sign of development?



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Old 1st May 2010   #3
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Default Re: Female Taricha lays eggs again

If you're judging by the naked eye, you won't be able to tell much until they start to neurulate (they will elongate and become flat along one side). It could take several days for this to happen.



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Old 2nd May 2010   #4
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Default Re: Female Taricha lays eggs again

It mainly depends on the temperature you keep your eggs,
I keep them outside, that means between 6-20C during a day. The time until development is seen by the eye (as John said) is around 2-3 weeks.

Warmer temperature may get them in about 10-15 days into this stage.

Uwe




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Old 2nd May 2010   #5
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Default Re: Female Taricha lays eggs again

Uwe, John said several days, not 2-3 weeks. I'm kind of confused.



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Old 2nd May 2010   #6
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Default Re: Female Taricha lays eggs again

You should be able to tell after a few days. I think Uwe was talking about hatching times, which can take 20 days or so.



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Old 2nd May 2010   #7
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Default Re: Female Taricha lays eggs again

Thanks.



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Old 2nd May 2010   #8
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Default Re: Female Taricha lays eggs again

I am not talking about hatching times. But if you "incubate" outdoors it will take some time that the eggs develop.

A few days is only when they are held above 20C 24h.

Its all about the temperature (and Taricha eggs are more on the slow side of development).

Uwe




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Old 2nd May 2010   #9
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Default Re: Female Taricha lays eggs again

I'm glad that you said they are on the slow side because that means there still might be a chance that they're fertile.



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Old 2nd May 2010   #10
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Default Re: Female Taricha lays eggs again

Oh, sorry then, Uwe.
Ive certainly experienced the effects of temperature in hatching times, i just didnt think it was so strong for this species.



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Old 3rd May 2010   #11
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Default Re: Female Taricha lays eggs again

Quote:
Originally Posted by oregon newt View Post
I'm glad that you said they are on the slow side because that means there still might be a chance that they're fertile.
Hi,

yes Tarichas are more on the slow side. For Taricha torosa are data from the field cited in Petranka and the hatching time for these animals varies from 14 days (S-Cal) to 52 days (NW Cal). So you see the differenz.

At what temp are you keeping your animals?

Uwe



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