Why are my shrimps all male?

Hmmm.. This is rare.. Usually when you buy shrimps in packs, its usually the males that are rare. Meaning out of a pack of say 20 pcs you should get about 2-3 pcs of male if you are lucky. I ever bought a pack of fire reds with all 20 pcs being females! I think you should just buy more females in and see how it goes.

Hehe in another forum, someone ( not ts ) said that its impossible to selective breeding out till left one of the sex.

Back to topic.

Now you can go gc and select those intensive yellow female to seletive breeding again. Its very difficult to get intensive colour male actually.

[ultrakiasu]

I read from some overseas forums, temperature can determine the gender of the shrimplets at embryo stage.

And certain gender would hatch earlier than the other, thus early harvest at the hatchery generally have the batch of the same gender.

My 2 cents worth...

[cheetf]

Bro, you only discovered this after one year?

[gryphon]

Tell us more about your setup and water change

[lucas_1957]

Originally Posted by cheetf

Pick individually if you can. That way you can be more certain of females.

Yes, heading to colourful later

Originally Posted by binniez

Hmmm.. This is rare.. Usually when you buy shrimps in packs, its usually the males that are rare. Meaning out of a pack of say 20 pcs you should get about 2-3 pcs of male if you are lucky. I ever bought a pack of fire reds with all 20 pcs being females! I think you should just buy more females in and see how it goes.

Yes will do so

Originally Posted by eviltrain

Hehe in another forum, someone ( not ts ) said that its impossible to selective breeding out till left one of the sex.

Back to topic.

Now you can go gc and select those intensive yellow female to seletive breeding again. Its very difficult to get intensive colour male actually.

Not really, most of the males in my tank have quite good colour

Originally Posted by ultrakiasu

I read from some overseas forums, temperature can determine the gender of the shrimplets at embryo stage.

And certain gender would hatch earlier than the other, thus early harvest at the hatchery generally have the batch of the same gender.

My 2 cents worth...

Thats interesting, can pm me the link?

Originally Posted by cheetf

Bro, you only discovered this after one year?

I guess i did not realise it at first until i saw that i had less and less berried females, then i realised. I was hoping some of the young shrimplets would be females, but it doesnt seem so, so i got worried only now.

Originally Posted by gryphon

Tell us more about your setup and water change

pH:7.5
Temp: Max 28, between 26-28
Water change: 10% once every 2 weeks
Filter: Sponge filter
Flora: java moss and hornwort

Could it be that the rest of the females kena gangbanged till they died? 40 to 1 seems abit extreme.. =X

[silane]

Originally Posted by lucas_1957

Hi guys, i realised that almost all the shrimps in my tank are male except for one female Any idea what is happening? I dont specially cull away the female shrimps, so why did this happen?

What species and what size? What is the population ?

[lucas_1957]

Originally Posted by binniez

Could it be that the rest of the females kena gangbanged till they died? 40 to 1 seems abit extreme.. =X

Er... Seems unlikely

Originally Posted by silane

What species and what size? What is the population ?

They are yellow shrimp, size is average about 1.5cm, got some is bigger than that.

What do you mean by what is the population? Are you asking how big is the population? There are about 40 shrimps.

They are serving NS!