To investigate the genetic population structure of the Dover sole, Solea solea L., allozyme electrophoresis was performed on 303 fish collected from seven locations ranging from Cumbria, Great Britain, to Greece. A total of 22 enzyme systems were analysed, coded by 33 loci. Of these, 27 loci were polymorphic using the P99 criterion. A phenogram using Prevosti’s Distance generated by the Wagner ...

Article history: Received 9 July 2007 Received in revised form 2 January 2008 Accepted 10 January 2008 Ecotones are zones of transition between two adjacent ecological systems and are characterized by a high rate of change compared to these adjacent areas. They are dynamic entities with both a spatial and temporal property, reflected in an ecotone width and location, which vary across time duri...

s 60, 5747 (1956). (100) FRANKEL, S., AND ALLERS,R.: Biochem. Z. 18,40 (1909).(101) FRIEDENWALD,J. S., MICHEL,H., AND BUSCHKE,W.: Arch. Biochem. and Biophys. (102) FURTH,0. YON: Hoppe-Seyler’s Z. physiol. Chem. 24, 142 (1898).(103) FURTH,0. VON: Hoppe-Seyler’s 8. physiol. Chem. 26, 15 (1898).(104)FURTH,0. VON: Hoppe-Seyler’s Z. physiol. Chem. 29, 105 ...

study of the spatial distribution of a pest and its natural enemies provides better decision tool for integrated pest management. the spatial distribution and seasonal activity of panonychus ulmi (koch) and its predator zetzellia mali (ewing) were studied in an apple orchard in khoramdareh (zanjan province, iran) during 2007. the interaction (density dependence) between the prey and its predato...

Ecological theory predicts that two species with similar requirements will fail to show long-term co-existence in situations where shared resources are limiting, especially at spatial scales that are small relative to the size of the organisms. Two species of intertidal mussels, the indigenous Perna perna and the invasive Mytilus galloprovincialis, form mixed beds on the south coast of South Af...

Directed self-assembly can produce ordered or organized superstructures from pre-existing building blocks through pre-programmed interactions. Encoding desired information into building blocks with specific directionality and strength, however, poses a significant challenge for the development of self-assembled superstructures. Here, we demonstrate that controlling the shape and patchiness of p...