Home News Archive - MPI for Ornithology Bird pupils behave unexpectedly different Publications of Kai Berthold All genres Journal Article (1) Journal Article (1) 1998 Journal Article Weinzierl, R. P.; Berthold, K.; Beukeboom, L. W.; Michiels, N. K.: Reduced male allocation in the parthenogenetic hermaphrodite Dugesia polychroa. Evolution: International journal of organic evolution 52 (1), pp. 109 - 115 (1998) MPG.PuRe DOI