What happen after many generations breeding?

[New To Shrimp]

Hi guys

Suppose that I got 2 Red Cherry Shrimp, the best ones. I put them separately and they will have babies, and those babies will have more babies...and so on, until the colony reach 100 shrimps. I wonder how the new shrimp would be, Are they smaller? Weaker? Or less color? Or still the same?

 

[sdlTBfanUK]

To an extent this is how many peoples colonies evolve! In order to keep good colour etc you will need to keep culling inferior colour shrimps, preferably before they can reach breeding age/size! It is a never ending process and if you don't do it from the start it soon gets out of hand and the majority end up wild/brown colour, mine have done this.

I think this answers the question, but let me know if not or you want further advice?

Simon

[New To Shrimp]

Thanks for your quick reply. Last time I bought a fish tank and the seller gave me a lot of shrimp, he said they are red cherry but I notice some of them have less color, some are transparent. I think he didn't cull it.

If we breed the F1 together and cull it we still have the same color, is that right? Because I know we can't do that on human, when F1 cross F1, the F2 will be disabled.

[Crabby]

If breeders cull their shrimp, they will sell them as high grade shrimp, and charge more for it. But you still have to cull if you start off with good quality starting shrimp. You'll generally get a mix - some higher, and some lower grade shrimp, no matter what the parents are. Obviously with higher grade parents, the offspring will be much more likely to have high grade colouration. The reason we cull is to increase the quality of the genetics, so a bad quality one doesn't breed with a high quality and bring down the general quality.
Does that answer your question?

[New To Shrimp]

Absolutely

thank you very much, I will release the bad ones to the river

[Crabby]

Noooooooo don't do that please! Introducing species that aren't native to a local water system can be very detrimental to the waterway. People who cull choose to do so by either selling the worse-looking shrimp to other fish keepers for cheap or free, feeding to a turtle or large predatory fish, or keeping them in a different tank. 

[jayc]

1 hour ago, New To Shrimp said:

I will release the bad ones to the river

Absolutely agree with Crabby. There are many reasons why you shouldn't release unwanted pets into the local eco system.

Which country are you from?

There might also be laws in certain countries against releasing livestock into local waterways.

 

You can give them away, sell them to a Local Fish Shop, or sell the poorer ones at a cheap price to beginners.

 

[New To Shrimp]

I am in Australia, yes there maybe some rules about releasing livestock to the waterway, I am not sure. So I will keep them in a spare 10L bucket, they will have enough moss to live. I don't want to feed them to the big fish, so cruel. And I think nobody want to get the transparent shrimps like that. 
thanks everyone for the answers. I appreciate that.

[jayc]

4 hours ago, New To Shrimp said:

I am in Australia, yes there maybe some rules about releasing livestock to the waterway, I am not sure

Crabby and I are also both in Australia. And we are 100% definite that releasing livestock in waterways is not allowed.

If you live on one of the big cities in Australia, our rivers are mostly brackish water, so the shrimp will die within a day. Same result as feeding your fish. At least the fish got some food. It's nature. Something will die to feed something else. Same with flushing them down the toilet, which is not a good idea and no worse than feeding fish. The shrimps will die almost immediately in sewerage. 

If you lived more inland where rivers are fresh water, releasing aquarium shrimps will impact our native shrimp, and expose them to diseases. Also not a good idea.

Talk to your LFS and ask if they will accept low quality shrimp for free.

 

[sdlTBfanUK]

I'm with JayC and Crabby, put them in with the fish and they will ether get eaten as a treat to your fish, and that  is completely natural, or if the fish don't eat them then they can live/work in with the fish so either way is a win! 

Simon