The possibility of partial replacement fish meal with alfalfa flour in feeds for the Australian red-clawed crayfish (Cherax quadricarinatus) has been investigated. Crayfish were kept aquariums a volume 150 liters at temperature 24-26.5 °C. control group was fed granular feed intended sturgeon fish. In experimental feeds, partially replaced flour. An enzyme preparation, natuzyme, added to one op...

Cherax reovirus infects redclaw crayfish (Cherax quadricarinatus) and it may be involved in mortalities between 5-20 % stunting of up to 40 survivors. The sequence the RNA-dependent RNA polymerase was used develop a reverse transcription, quantitative, PCR (RT-qPCR) which specific against seven other crustacean viruses (Athtab bunyavirus, Chequa iflavirus, Macrobrachium rosenbergii nodavirus, Gil...

Cyclin B is a regulatory subunit of maturation-promoting factor (MPF), which has a key role in the induction of meiotic maturation of oocytes. MPF has been studied in a wide variety of animal species; however, its expression in crustaceans is poorly characterized. In this study, the complete cDNA sequence of Cyclin B was cloned from the red claw crayfish, Cherax quadricarinatus, and its spatiot...

Hybridization and genetic introgression following the introduction of exotic species can pose a significant threat to the survival of geographically restricted species. A remnant population of the critically endangered freshwater crayfish Cherax tenuimanus in the upper reaches of the Margaret River in southwestern Australia is under threat following the introduction and spread of its congener C...

Glycosylation is of importance for the structure and function of proteins. In the case of vitellin (Vt), a ubiquitous protein accumulated into granules as the main yolk protein constituent of oocytes during oogenesis, glycosylation could be of importantance for the folding, processing and transport of the protein to the yolk and also provides a source of carbohydrate during embryogenesis. Vt fr...

Reoviruses have been isolated from many aquatic animals including fish and crustaceans. Viral inclusion bodies of reovirus found in the cytoplasm hepatopancreatic cells redclaw crayfish (Cherax quadricarinatus). In past, reverse transcription polymerase chain reaction (RT-PCR) designed across other hosts was attempted to detect but no specific set primers successfully identified infected crayfi...

In the Australian red-claw crayfish Cherax quadricarinatus (von Martens) (Decapoda, Parastacidae), a gonochoristic species, seven different combinations of intersex individuals (with both male and female genital openings) have been described. However, to date, the genetic basis for this phenomenon has not been investigated. This study was designed to test a simple chromosome-based sex-determina...