One of the big advantages of working with Marmorkrebs is that they are genetically identical. And yet, they vary (see also Vogt et al., 2008).
To make experimental results from different labs around the world more comparable, you would think that the right thing to do would be to try to standardize rearing conditions as much as possible. So I was very interested in Vogt’s comment in a recent paper that he has reared eight generations of Marmorkrebs solely on TetraWafer Mix. There are not too many animals that you can raise and breed on one single staple diet.
The eagle-eyed will notice no English on the label. As far as I can tell, this particular fish food isn’t available for sale in North America. At least, I can’t find it in Tetra’s U.S. product catalog. But it can be found in several online shops based in Europe, which will ship to North America. Shipping isn’t necessarily cheap, however.
I managed to get some of this, and have found it to be a nice addition to the lab. Given that we have many animals housed individually in an Aquatic Habitats system, the wafers are much easier to give to the animals through the top holes than other flake foods. And the crayfish seem to like it.
Vogt G. 2010. Suitability of the clonal marbled crayfish for biogerontological research: A review and perspective, with remarks on some further crustaceans. Biogerontology 11(6): 643-669. http://dx.doi.org/10.1007/s10522-010-9291-6
Vogt G, Huber M, Thiemann M, van den Boogaart G, Schmitz OJ, Schubart CD. 2008. Production of different phenotypes from the same genotype in the same environment by developmental variation. The Journal of Experimental Biology 211(4): 510-523. http://dx.doi.org/10.1242/jeb.008755
P.S.—Tetra, you’ve been in business like forever. Why is your US website so hard to navigate? Couldn’t you give us a simple search box?