... the Italian Peninsula and Sicily(Figure 1 and Table 1). Italian Peninsula was added tothe sampling to allow us to understand the context ofthe B. balearicus invasion in Sicily and to compare ... Switzerland; and Authorisation No. 1798,Servicedelaconsommationetdes affaires vétérinaires,Canton de Vaud, Epalinges, Switzerland.Additional materialAdditional file 1: Table with allele size ranges, ... Sex ratio and unisexual sterility in hybrid animals. J Genet1922, 12(2):101-109.46. Kawamura T, Nishioka M, Ueda H: Inter- and intraspecific hybrids amongJapanese, European and American toads....