ABSTRACT Commercially viable aquaculture of noble crayfish Astacus astacus (Linnaeus, 1758), a once plentiful food species in Europe, requires production of suitable artificial diets for optimal growth in recirculating aquaculture systems (RAS).
The noble crayfish Astacus astacus is native to nearly all freshwater systems in Europe (Ingle 1997, Westman 2002) and was previously a common human food source (Cukerzis 1988, Skurdal & Taugbol 2001, Holdich 2002).
The noble crayfish is of commercial interest for aquaculture and for restocking measures, including production in recirculating aquaculture systems (RAS), but effectively formulated diets are lacking to reach commercial production levels.
2014) found pelleted carp feed insufficient for commercially viable noble crayfish growth in RAS (Fig.
Noble crayfish (Astacus astacus) is an endangered endemic species in Europe and in Finland and is listed as vulnerable in the IUCN red list.
In the long term, improving the status of noble crayfish stocks and preventing the accidental spreading of crayfish plague and alien crayfish.
This message ties together the three themes: i) crayfish plague is the biggest threat for noble crayfish; ii) noble crayfish requires conservation actions and iii) alien species pose a threat to native ones.
Crayfish such as the Noble Crayfish
(Astacus astacus), are at risk from the impact of invasive species and diseases.
Keywords:crayfish plague, crayfish plague prevalence, quantitative PCR, noble crayfish stocks, crayfish restocking, health monitoring
Diagnostic methods for confirming the presence of crayfish plague and population level sampling procedures for noble crayfish stocks will be tested and specified.
Results:Guidelines for monitoring the health of noble crayfish stocks and policies for transfer and restocking.
Energy content of marron (Cherax tenuimanus) and noble crayfish
(Astacus astacus) hepatopancreas and its relationship to hepatopancreas moisture content.