作者单位:Christian Albrechts Univ Kiel, Inst Anat, Fac Med, Kiel, Germany[1]Univ Leipzig, Inst Vet Physiol, Fac Vet Med, Tierkliniken 7, DE-04103 Leipzig, Germany[2]Univ Leipzig, Inst Vet Physiol Chem, Fac Vet Med, Leipzig, Germany[3]Leibniz Inst Farm Anim Biol, Fish Genet Unit, Inst Genome Biol, Dummerstorf, Germany[4]