Home News from the Institute Blue-throated macaws have advanced motor imitation capabilities Publications of Filip de Ridder All genres Journal Article (1) Journal Article (1) 1998 Journal Article Beukeboom, L. W.; Seif, M.; Plowman, A. B.; de Ridder, F.; Michiels, N. K.: Phenotypic fitness effects of B chromosomes in the pseudogamous parthenogenetic planarian Polycelis nigra. Heredity 80 (5), pp. 594 - 603 (1998) MPG.PuRe DOI