Section 1: New model organism for biology General Biology, Happy Birthday! The First Decade of Marmorkrebs research-Results and Perspective; G. Scholtz of Humboldt University zu Berlin, Germany Conservation, Predicting the range expansion of a partenogenic crayfish invader; P. Feria and Z. Faulkes of TheUniversity of Texas-Pan America, USA Experimental Biology, Marble Crayfish as A New Model Organism and A New Threat to native Crayfish Conservation; Z. Faulkes of The University of Texas-Pan America, USA Physiology, Tolerance of Marbled Crayfish Procambarusfallax f. virginalis to Low Temperature in Nordic Climate; K. Kaldre of Estonian University of Life Science, Estonia Reproductive biology, Parthenogenesis: Mechanisms, evolution, and its Relevance to the Role of Marbled Crayfish as Model Organism and Potential Invader; P. Martin of HumboldtUniversitatzu Berlin, Germany Aquarium, Marbled crayfish Gaining Ground in Europe: the Role of the Pet Trade as invasion Pathway; C. Chucholl of Fisheries Research Station BW, Germany Cell biology, Research on stem cells, Ageing, Cancer Resistance, and Epigenetics in Marbled Crayfish and Relatives: Potential Benefits for Human Biology and Medicine; G. Vogt of University of Heidelberg, Germany Section 2: Crayfish: new developments Aquaculture,Developing Markets for New Product: Aquacultured Redclaw in Mexico; A. Garza de Yta of CRM International S.C., Mexico The Biology of Crayfish Plague Pathogen Aphanomycesastaci: Current Answers to Most Frequent Questions; J. Dieguez-Uribeondo of Royal Botanic Garden, Spain Environment, A Review of Current Techniques for Sampling Freshwater Crayfish; S. Parkyn of Freshwater Ecology Consultant, Australia Behavior, Behavioral ecology of invasive crayfish: its contribution to conservation; E. Tricarico of Florence University, Italy Prevent crayfish plague, Chaos and Adaptation in the Pathogen-Host Relationship in Relation to the Conservation: the Case of the Crayfish Plague and the Noble Crayfish; J. Jussila, H. Kokko, and J. Makkonen of The University of Eastern Finland, Finland, Ivana Maguire of University of Zagreb, Croatia Monitoring, Crayfish as Tools in Water Quality Monitoring; P. Kozak and I.Kuklinaof South Bohemian University, Czech Phylogeny, Phylogenetic Estimate of the Freshwater Crayfish (Decapoda: Astacidea) using Morphology and Molecules; D. Stern and K. Crandall of The George Washington University, USA Section 3: Global overview of freshwater crayfish biology Atlantic North America, The Crayfish Fauna of Canada and the United States in North America; R. Thoma, USA Middle America, The Crayfish of Middle America; F. Alvarezand J. L. Villalobos of ColeccionNacional de CrustaceosInstituto de Biologia, Mexico Pacific North America, Historical Biogeography of Pacifastacuscrayfishes and their Branchiobdellidan and Entocytherid Ectosymbionts in Western North America; E. Larson of University of Tennessee and B. W. Williams of Southern Illinois University, USA South America, The Native South American Crayfish (Decapoda: Parastacidae); E. Rudolph of Universidad de Los Lagos, Chile, M. P. Almerao of Federal University of Rio Grande do Sul, BI,Brazil Oceania, the Freshwater Crayfish of the Oceania Region; J. M. Furseand K. L. Dawkins of Griffith University, Q. F. Burnham of Edith Cowan University, A. M. M. Richardson of University of Tasmania, Australia Africa, Crayfish of Africa; C. Boyko of American Museum of Natural History, USA Europe,Crayfish in Europe: Biogeography, Ecology and Conservation; L. Fureder University of Innsubruck, Austria Asia, Taxonomic Synopsis and Biology; T. Kawai of Wakkanai Fisheries Institute, Japan, G. S. Min of Ina University, South Korea, E. I. Baravanshchikov of TINRO, Russia, V. S. Labay of SakhNIRO, Russia, and H. S. Ko of Silla University of South Korea Crayfish worms, Branchiobdellidans (Annelida: Clitellata), Ectosymbionts of Crayfishes; S. R. Gelder of University of Main at Presque Isle, and B. W. Williams of Southern Illinois University, USA