Intra- and intergenotypic larval competition in Drosophila melanogaster : effect of larval density and biotic residues J. A. CASTRO, Luisa M. BOTELLA and J. L. MENSUAGenet. Sel. Evol., 19 4 (1987) 427-444DOI: https://doi.org/10.1051/gse:19870404