[Killietalk] sex ratios

["Curtis Smith" <cskillies at hotmail_com>]

Mike, Far be it for me to criticize the efforts of your students.   They are 
to be applauded for their efforts and perseverance!

I am just relating my own personal experiences with two fry per container 
and my results.   I use wide-mouth Rubbermaid 1/2 gallon jars with a wee bit 
of Java Moss and a snail in them and do minimal water changes.  Thus far I 
have found only two species that I could not get pairs from using this 
technique and that may have been my own fault by changing too much water at 
an inopportune time.   My best example is Leptolebias aureoguttatus which 
gives  all males and you hope to get a single female to continue your line.  
  I used high pH wqith very limited success and temperature control to no 
avail.   However, placing two to a jar gives me a pair every time!   I also 
noted that at various times I had a fry hatch and grow in my adult's 
breeding tank with the presence of an adult male.   All these turned into 
females.

Curt Smith


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