McDonough et al.: Sexual differentiation and gonad development in Mugil cephalus 



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Figure 12 



Photomicrographs of histological sections of sexually differentiating male striped mulletlMug// cephalus L.) . (A) Early 

 differentiation of a 164-mm specimen at 400x, scale bar=20 fim; (B) early differentiation of a 204-mm specimen at 400x, 

 scale bar=20 j<m; (C) advanced sexual differentiation of a 247-mm specimen at lOOx, scale bar=100 jim; (Dl advance 

 sexual differentiation of a 258-mm specimen at 400x, scale bar=20 j<m; (E) same specimen as previous photo at lOOx 

 showing full differentiation, scale bar=250 iim; iF) differentiated testes with melanomacrophages centers present in a 

 261-mm specimen, scale bar=250 i<m (see text for detailed descriptions). Labels: ST = somatic tissue; GT = germ tissue; 

 PD = primary duct; SD = secondary ductwork; BV = red blood vessels; GE = germinal epithelium; SPG = spermatogonia: 

 MMP = melanomacrophages: L = lobule. 



