TROPLIST: Nasco tropicalis infertile

[Niehrs Christof]

We have had problems with Nasco tropicalis. In the last batch we
received from them in 2008 both males and females are infertile. Females
do not lay eggs at all upon priming. Male frog testis do not fertilize
eggs of non-Nasco origin, which however fertilize well with other
testis.
 
We first thought that the animals were still to young (even though they
were sold as >6 months old). Now they are another 5 months older an the
animals are still infertile.
Unrelated trops which are older are working OK, so it is not housing
conditions but definitely to do with Nasco frogs.
 
Anybody else have recent infertility problems with Nasco tropicalis ?
 
  
 
Prof. Christof Niehrs
Division of Molecular Embryology
German Cancer Research Center
Im Neuenheimer Feld 581
69120 Heidelberg
Germany
 
Tel +49-6221-42-4690
FAX +49-6221-42-4692
homepage: http://www.dkfz.de/en/mol_embryology/index.html
email: niehrs@dkfz.de

TROPLIST: xenopus one or nasco?

Kurt Marek kmarek@ucsd.edu
<mailto:kmarek%40ucsd.edu?Subject=TROPLIST%3A%20xenopus%20one%20or%20nas
co%3F&In-Reply-To=> 
Wed Dec 20 17:51:02 EST 2006 

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________________________________

Where do people order their trops from? We've been getting them from  
Nasco because that's where we have always purchased our laevis, but  
we are considering a switch. Nasco refused to replace a frog that  
died a day after arrival and they refuse to guarantee the safe  
arrival of an $1100 order due to the weather. In addition, they are  
much more expensive than Xenopus One. Has anyone had experience with  
Xenopus One frogs? We are in need of an 'emergency' supply of males  
as our in-house breeding hasn't been able to keep up lately.

Thanks,
Kurt





Kurt Marek, Ph.D.

Division of Biological Sciences, Neurobiology Section
University of California, San Diego
9500 Gilman Dr., Pacific Hall 3222B
Mail Box 0357
La Jolla, CA 92093
Ph: 858-534-2456
kmarek@ucsd.edu <mailto:kmarek@ucsd.edu> 



 
 
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