sexing gobiids

[Gianluca Polgar]

Dear all,

I've got a question for Ichthyologists/gobiologists: in genus 
Periophthalmus (Perciformes: Gobiidae), is the presence of a small 
urogenital papilla visible immeadiatly posterior to the anus a good 
character for sex determination?
(e.g. indicates it's a male)?

Thanks

Gianluca Polgar


Gianluca Polgar
c/o prof L. Bullini
Università degli studi di Roma "La Sapienza"
Department of Genetics and Molecular Biology, "Charles Darwin"
Via dei Sardi, 70
00185
Roma, Italy