Max Planck Institute of Animal Behavior Media & Outreach Overview News iain-couzin-receives-the-2024-fyssen-international-prize Publications of Filip de Ridder All genres Journal Article (1) Journal Article (1) 1. 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