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Shadow Tiger + Shadow Bee = Shadow TiBee

As I realized that ‘shadow’ is a trait inherited through genes of tiger shrimp, I have introduced some shadow bee shrimp into my advanced breeding project with Tibees in 2014 . Especially german breed of red shadow mosura capped and  spotted head pinto phenotypes.

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In my small shrimp population the selective pressure had grown very strong, and thus I needed to bring in some fresh blood in order to keep my shrimp vital and healthy.

And indeed, some  phenotypes known as pinto, multistripe, etc. cropped up as early as in the F1 of tigerbee x shadow bee, and the shadow tiger traits were further enhanced. For me, this is just another piece of evidence that there are common ancestors.

F1 f.e. 2014:

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However, in these crossbreeds there were also quite a few unwanted traits that had a negative effect on the quality I was aiming for. Crossing, or rather, backcrossing with pintos and shadow bees has thus posed another interesting challenge to promote the positive traits and to repress the negative ones, and to create new beauties with unique patterns. Shadow Tibees!

Lots of years of work for lots of breeders in all the world!

Please don’t be confused about all the different names for similar looking shadow shrimps like Galayx, Fishbone, Nanacy and so on. Those are all shadow Tibees at  first.  And then they got a individual name for the breeders line and or the pattern thereof.

So the correct name  in future of those shrimp may be:

Caridina spec. shadow tibee var. ‘Galaxy’ or

Caridina spec. shadow tibee var. ‘Fishbone’ or

Caridina spec. shadow tibee var. ‘Nanacy’

and  of course

Caridina spec. shadow tibee var. ‘Pinto’.

etc.

To be continued with F2 and further generations

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Shadow shrimp – in a nutshell – part 2

Read this first?  Shadow shrimp – in a nutshell – part 1

 

Breeding full colored blue/black shrimp on to form a stable homogenous population was one of the first great challenges of my breeding project. I’ve managed to reach this goal e.g. with one line of uniformly blackish blue shrimp, some of which have white tail fan tips and a slight striped pattern.

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This line has over 95% percent tiger genes and has been known as midnight princes. Some of them – the most intensively colored ones – looked very much like the more well-known shadow bee shrimp variant “King Kong”, and more than once these shrimp erroneously ended up in the shadow bee category of shrimp championships.

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With the knowledge I have today I think the name shadow tigers is fully justified for these variants, and that’s what I call them now, too.

I crossed in tigerbee shrimp (  it was without any shadow bee since 2008 until 2013) later on to improve the shadow traits in the midnight princes, the white signs included, and now there are even red variants of this form.

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In another line, at around the same time, the phenotypes red and blue bolt started cropping up more frequently.

 

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Pictures above shows best of it but as these shrimp passed down the unwanted traits of a golden bee (mainly a decrease in the density of the white parts), and as these traits were dominant, I soon started excluding these phenotypes from my breeds altogether.

Besides the midnight princes, my main focus was on breeding and stabilizing white tigers. My goal were vital tiger shrimp with a characteristic tiger pattern and as much white as possible.

In retrospect I must say this was a very long and stony road to take.

To be continued with more information on problems and side effects …

To be continued with more information on the development of white tigers/safari lines

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Shadow shrimp – in a nutshell – part 1

I strongly support the theory that the shadow phenotype has been inherited from tiger shrimp.

 

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(f.e. pictures shows  tail of shrimp with 95% tiger genes , 5% CBS genes and 0% Taiwan bee genes)

In this article (german) I go further into detail about the origins of shadow bee shrimp (commonly known as Taiwan bee) phenotypes. In my opinion it has been proven that their ancestry is very similar to that of tigerbees.

 

The phenotype “snow white/golden bee” crops up strikingly frequently in a tigerbee line.

Thus it is quite probable that the first genetic mix came with a golden bee, which has lead to the first “mutant”, a shadow bee.

This first shadow bee shrimp must have had the phenotype “black full/extreme shadow”

aka midnight prince  or “extrem king kong” and what both is vey similar to phenotype of black tiger orange eyes. Keep in mind:  without OE-phenotype  tiger shrimps  are able to show white pigments, with OE they never do but they alway have full colored bodies.

The first breeders from Taiwan very probably reproduced these new color forms by consequently backcrossing them with CRS, which has finally led to stable shadow traits AND, at the same time, to the classical phenotypes and red variants. What a great performance!  In analogical to black/ blue tiger OE, this shrimp bodies are full colored with brillant blue/black  and this trait will inherite in a recessive way. They didn’t show OE so they can show a brillant white color, too.

In the near future I am going to publish a table with characteristics that may help explaining “shadow traits” a bit further, why the colors are more brillant than on other kind of Caridina shrimp and so on because there are some more heteroses effects  by hybridization in a Taiwan bee.

In my breeding lines, I’ve also found shrimp from time to time that looked very much like Taiwan bees, mostly of the “full” variant, although I’ve never crossed in any shadow shrimp till 2014.

In my breeding groups, the traits generally known as “shadow traits” have proven to be passed down not simply recessively but additively.

I assume the reason for this is that I’ve backcrossed largely with tiger shrimp without OE ( f.e. midnight prince) so I get more tiger genes based Tibees without OE. The heredity is thus different.

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Continue with  Shadow shrimp – in a nutshell – part 2