R. Godoyherrera et al., DISRUPTION OF THE STRUCTURE OF LARVAL FORAGING BEHAVIOR IN INTERSPECIFIC HYBRIDS IN DROSOPHILA, Heredity, 72, 1994, pp. 260-268
Larval foraging behaviour in two sibling species, Drosophila pavani an
d Drosophila gaucha belonging to the mesophragmatica species group, is
described. Interspecific hybrid larvae derived from both reciprocal c
rosses of the parent species show disruption in the organization of th
eir behaviour, leading to lower mean feeding rates. This, together wit
h interactions involving biotic residues, described elsewhere, is like
ly under competitive conditions to contribute to reduced fitness of th
e hybrids relative to the parent species.