Evolution des potentialités dysgénésiques du système P-M dans des populations expérimentales mixtes P, Q, M et M′ de Drosophila melanogaster D. AnxolabéhèreD. NouaudS. Ronsseray OriginalPaper Pages: 81 - 95
The influence of species frequency, temperature regime and previous development condition on relative competitive ability between Drosophila melanogaster and Drosophila simulans M. C. CarracedoP. Casares OriginalPaper Pages: 97 - 106
Température fluctuante et hétérosis chez Drosophila melanogaster D. Higuet OriginalPaper Pages: 107 - 110
NORs and counterstain-enhanced fluorescence studies in Cyprinidae of different ploidy level B. MayrP. BabM. Kalat OriginalPaper Pages: 111 - 118
Genetic divergence in wild populations of Medaka, Oryzias latipes (Pisces: Oryziatidae) from Japan and China M. Sakaizuml OriginalPaper Pages: 119 - 125
Torus-shaped bands in polytene chromosomes of Drosophila. Relationship of toroidal structures and intercalary heterochromatin Z. G. Scouras OriginalPaper Pages: 127 - 132
A chromosome study of twenty species of Spanish carabid beetles (Coleoptera) J. Serrano OriginalPaper Pages: 133 - 142
Genetic similarity between natural populations of Drosophila ananassae from Kerala and Andaman and Nicobar Islands B. N. Singh OriginalPaper Pages: 143 - 147
X-ray induced rearrangements between germ-line limited and soma chromosomes of Acricotopus lucidus (Diptera, Chironomidae) W. StaiberD. Thudium OriginalPaper Pages: 149 - 156
Geographic isolation, gene flow and population differentiation in Goodea atripinnis (Pisces: Goodeidae) M. M. WhiteB. J. Turner OriginalPaper Pages: 157 - 160