Why are my shrimps all male?

[discuz]

Originally Posted by lucas_1957

But there are around 40 males to 1 female Its like too extreme already

Hi,

Realised i have the same issue with yellow shrimp (with bar on the back) ... i have about 30pcs and only 1 female.


mk

[silane]

If you have good number of females from start and getting less and less, that could be your female died when berried.

[lucas_1957]

Thanks silane, any idea why they will die while berried? Eggs too heavy, die from exhaustion??

[silane]

Originally Posted by lucas_1957

Thanks silane, any idea why they will die while berried? Eggs too heavy, die from exhaustion??

Too many males, no hidding space, bad water quality/parameters, bad molting, old age. If all the problems are not but old age, you should have replacement females.

So what was the number of females and total number you have before?

[lucas_1957]

long long time ago i started with 8 from c328, then they started multiplying like crazy and i didnt really keep track of how many male/female i have. i will provide more hiding place and check my parameters, thanks

[globalcookie]

I'm keeping some yellow shrimps too and they are not breeding for e last couple of months. Could it be, inbreeding over a period of time, till they stop breeding? Some of my female has the saddle on it's back, but not getting pregnant.

Maybe we can swap females?

[silane]

Originally Posted by lucas_1957

long long time ago i started with 8 from c328, then they started multiplying like crazy and i didnt really keep track of how many male/female i have. i will provide more hiding place and check my parameters, thanks

I see, then could be one of the problem i mentioned.

[silane]

Originally Posted by globalcookie

I'm keeping some yellow shrimps too and they are not breeding for e last couple of months. Could it be, inbreeding over a period of time, till they stop breeding? Some of my female has the saddle on it's back, but not getting pregnant.

Maybe we can swap females?

Dont think swap females will help. Basically, if you see females and not mate, it is likely your water parameter not correct or you didnt feed them well to make them grow.

[lucas_1957]

How come all the yellow shrimp keepers after keeping for long time get this problem? Could it be related to the genes of the shrimps itself?

[globalcookie]

Let me go check e perimeters soon. I did wc of abt 20% each time over e last 2-3wks. There were some deaths (avg 1 per day), i did UV light treatment over 24hrs. Dying has stopped tho.

Feeding is definitely ok. I throw in substantial amt of food, they don't even finish in an hour sometimes.