Natural enemies such as predators and parasites are known to shape intraspecific variability of behaviour and personality in natural populations, yet several key questions remain: (i) What is the relative importance of predation vs. parasitism in shaping intraspecific variation of behaviour across generations? (ii) What are the contributions of genetic and plastic effects to this behavioural di...

Im Rahmen der Studie SUCCESS 2006 wurden (Miss-)Erfolgsfaktoren von Hardund Softwareentwicklungsprojekten in Deutschland identifiziert. Dieses Papier schildert die Motivation, die grundsätzlich angewandte Vorgehensweise, von der Erfolgsfaktorenidentifikation bis zur Hypothesenverifikation, sowie eine Zusammenfassung der Ergebnisse der Studie.

After more than two decades of development, e-Government services have become not only familiar to but also a significant part of citizens’ life. However, as the needs of citizens in using e-Government services changes, an improved understanding of citizen’s continuous use intention is warranted. This study therefore aims to explore the factors that influence citizens’ continuous use intention ...

The corn leafhopper Dalbulus maidis (DeLong) (Hemiptera: Cicadellidae), transmits three important plant pathogens that adversely affect crop and ranges from the USA to Argentina. vector has a rich natural enemy complex generates high levels of parasitism, but its populations are persistent prevalent. We characterized oviposition sites D. on young plants in order verify hypothesis an strategy fo...

this study was conducted to evaluate the age-specific functional response of psyllaephagus zdeneki noyes & fallahzadeh (hymenoptera: encyrtidae) at different nymph densities of olive psyllid, euphyllura pakistanica loginova (hemiptera: psyllidae). due to parasitoid behaviour of feeding and parasitizing the host, both traits were separately explored on a daily functional response. results of...

1. In a population of American coots ( Fulica americana ) breeding in central British Columbia, Canada, some females pursued a reproductive strategy that combined nesting with laying parasitic eggs in the nests of conspecifics. To understand why only one quarter of the nesting females laid parasitically, I examined social and ecological factors that could potentially constrain nesting females f...

White grubs are larvae of Coleoptera of the family Scarabaeidae. They are known because of their intensive feeding habits on crop roots. Mallophora ruficauda (Diptera: Asilidae) is a dipteran parasitoid whose larva is a natural enemy for white grubs. This species is a solitary ectoparasitoid, where both female and larva realize different steps in the host location process. Female place its eggs...