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 insin 
Member
Joined: Feb 2006  USA
 Posts: 436 Feedback: 100% (13) |
Posted: 8/9/2012 11:20:38 AM
THE IMAGE ABOVE IS A PAID ADVERTISEMENT I have a school of supposed 50/50 male/female mix of tilapia that I growing out. The larger ones are just topping 3". I had to move the tank they were in, so I took them out and put them in a bucket. At this time I visually inspected the area where you are supposed to be able to differentiate males from females. It turns out that I have what "appear" to all be male, however perhaps they are too small to fully differentiate males from females at this time and perhaps I am jumping the gun on sexing. What are your thoughts. |
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Posted: 8/10/2012 11:40:34 PM
From google search, but it is difficult to tell when there small. As they get larger you can see it in the body shape also, fins and roundness of females
When a tilapia fingerling has reached a weight of 25 grams (1 ounce) it can normally be sexed by looking at the genital papilla. The genital papilla is located right behind the anus of the fish. If the genital papilla has one single opening you are looking at a male tilapia. Males have only one opening and both urine and milt will pass through this hole. If the genital papilla has two openings you are looking at a female tilapia, because tilapia eggs do not pass through the same hole as urine. If you find it hard to examine the genital papilla of fingerlings, try placing a drop of dye, such as food colouring or methylene blue, on the genital region. The colour will normally make it easier to distinguish the openings. |
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sgtgrits
Wait....what?
Team Member
Joined: Jan 2006 MI, USA
Posts: 1076 Feedback: 0% (0) Link To This Post |
Posted: 8/11/2012 6:51:05 AM
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nhsport
Team Member
Team Member
Joined: May 2002 CT, USA
Posts: 7897 Feedback: 100% (1) Link To This Post |
Posted: 8/11/2012 8:04:25 AM
Once again AR15 comes through.
Today however it strikes me as somewhat creepy  |
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dtrosch
Dr. Heinz Doofenshmirtz
Team Member
Joined: Aug 2004 VA, USA
Posts: 1618 Feedback: 100% (2) Link To This Post |
Posted: 8/11/2012 8:30:34 AM
Originally Posted By nhsport: Once again AR15 comes through. Today however it strikes me as somewhat creepy Yea, and I spend too much time in GD, so this thread title made me look twice where I was...
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Posted: 8/11/2012 8:30:54 AM
And I was hoping for some smart comments from the peanut gallery for cheap entertainment
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doc_Zox
Apple Certified Lazer Printer Repair since 1993
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Joined: Feb 2001 PA, USA
Posts: 10656 Feedback: 0% (0) Link To This Post |
Posted: 8/11/2012 8:47:53 AM
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TheRedGoat
The bad influence...
Team Member
Joined: Jan 2001 TX, USA
Posts: 39865 Feedback: 100% (13) Link To This Post |
Posted: 8/11/2012 9:39:21 AM
If they are old enough to go to the store... TRG |
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