The fecundity and sexual structure of weatherfish (Misgurnus fossilis) population, an inperilled protected freshwater fish with a poorly known life history, was studied in three waterbodies: the River Ner, Południowy canal Nowy Rów (Poland) differing hydrological character. We compared reproductive traits; i.e. sex ratio, absolute relative fecundity, oocyte size, gonado-somatic index body condi...
