Context The Australian glass shrimp (Paratya australiensis) has been identified as a cryptic species complex and several lineages occur sympatrically in eastern Australia. In south-eastern Queensland, the predominant are ‘4’ ‘6’, although only known area of sympatry Conondale Range is result translocation. Aim Our aim was to determine any evidence natural between two Mary River catchment using ...

Changes in gene and genotypic frequencies at four esterase loci were monitored over 25 generations in Composite Cross V, an experimental population of barley, to obtain experimental evidence concerning the balance of forces responsible for: (1) the marked differences in allelic frequencies among barleys from different ecogeographical regions of the world; and (2) the extensive allelic variation...

Populations of Fundulus heteroclitus, (Cyprinodontidae) a widespread coastal marine fish, were studied in control and artificially heated environments on the North Shore of Long Island, New York to determine (1) patterns of variation in biochemical phenotypes and (2) the extent to which this variation reflected adaptation to environmental characteristics. Variation at three of twelve polymorphi...