The concept of species and practical taxonomy: what is in-between? Evaluation of the DNA extraction method from ancient animal bones A comparison of different DNA extraction methods for slugs (Mollusca: Pulmonata) The use of isozymes for ecological analysis of semi-aquatic rodents Application of DNA fragment length polymorphism analysis for identification of small rodents Intraspecific genetic variability of white-fronted geese (Anser albifrons) in springtime migration Phylogenetic relationships in the taxons of the order Anseriformes determined by the specificity of immunoglobulins Use of mitochondrial DNA as a genetic marker in domesticated mammals Minimal and effective population size of conserved Lithuanian farm animals The method of Allium anaphase–telophase chromosome aberration assay Ex-situ stability of morphobiochemical properties of common caraway (Carum carvi L.) Abundance of T4-type bacteriophages in municipal waste-water and sewage Pollen susceptibility to acidification and DNA polymorphism of Scots pine (Pinus sylvestris L.) plus trees Repeated study of lead impact biomarkers in occupationally exposed workers Superoxide dismutase polymorphisms in wild po-pulations of herb Paris (Paris quadrifolia L., Trilliaceae) Spontaneous micronuclei in embryos of the Black-headed Gull (Larus ridibundus L.) populations Frequency of micronucleated erythrocytes in wild fish from natural freshwater bodies Investigation of UVC-induced DNA damage and its repair by SCGE assay in barley The growth and phenology patterns of herb Paris (Paris quadrifolia L., Trilliaceae): relation to soil and air temperatures Chemical ecology of blackflies: sexual dimorphism in cuticular washes of Wilhelmia equina (L.) (Diptera: Simuliidae) Genetic variability of the Lithuanian human population according to Y chromosome microsatellite markers