Dear Mr SCOTT, It is true that datas on ecology of D.melanogaster are scarce. We suggest : ROUAULT et al, 1982, Acta Oecol., 3, 331-338 VOUIDIBIO et al, 1989, PNAS, 86, 8442-8446 Hoping that it will help you, Sincerely J. DAVID and Y. CARTON