Procambarus clarkii is among the worst invasive species that have invaded Europe. It originates from the central south of the USA and northeastern Mexico and is a hardy, r-selected generalist. There exists a marked gradient in population numbers from southwestern to northeastern Europe: The Iberian Peninsula, Italy and France have the bulk of the populations, while northeastern populations are ...

The prophenoloxidase (proPO) system is considered an important mechanism of innate defence in arthropods. This enzymatic cascade has been studied in crustaceans such as the crayfishes Astacus astacus and Pacifastacus leniusculus and is located inside the haemocytes. An initial characterisation of this system in the commercially important red swamp crayfish Procambarus clarkii is described. The ...

Since Alexaudrowicz (1951) first described muscle receptor organs in the abdomen of Ho~m~rus ~garis and P~linurus ~ulgaris, several authors have studied the physiological and pharmacological properties of such organs, using mainly various species of crayfish as their objects of study. These investigations were based mainly upon the histological evidence presented by Alexandrowicz, concerning th...

Since Alexaudrowicz (1951) first described muscle receptor organs in the abdomen of Ho~m~rus ~garis and P~linurus ~ulgaris, several authors have studied the physiological and pharmacological properties of such organs, using mainly various species of crayfish as their objects of study. These investigations were based mainly upon the histological evidence presented by Alexandrowicz, concerning th...