The redclaw crayfish, Cherax quadricarinatus, is a freshwater decapod crustacean displaying a number of physical, biological, and commercial attributes that make it suitable for commercial aquaculture. Interest in redclaw crayfish, both for aquaculture and aquarium trade, has resulted in wide translocations of the species within Australia, south‐east Asia, and Central/South America. The redclaw aquaculture industry has been growing rapidly since the mid‐1980s in tropical and sub‐tropical regions of the world. Redclaw aquaculture is done mostly in extensive pond systems, but interest in developing more intensive systems is increasing. The present manuscript reviews current knowledge and trends of redclaw aquaculture, and areas where further research is needed are identified. Nutrition and reproduction of redclaw were recently reviewed in other manuscripts and those are summarized here. The present manuscript emphasizes environmental tolerances, diseases, aquaculture techniques, and marketing.

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Anaesthetics are used in aquaculture and fisheries to facilitate routine procedures, such as capture, handling, transportation, tagging, grading and measurements that can often cause injury or induce physiological stress. Two experiments were performed to assess the efficacies of four anaesthetic agents, clove oil, benzocaine, 2-phenoxyethanol and MS-222 on juvenile marbled spinefoot rabbitfish (Siganus rivulatus). In the first experiment we tested the lowest effective doses that produced induction and recovery times in 3 min or less and 5 min or less respectively. Dosages were 70 mg L À1 for clove oil, 60-70 mg L À1 for benzocaine, 400 lL L À1 for 2-phenoxyethanol and 100-125 mg L À1 for MS-222. In the second experiment, we determined optimal concentrations of the four anaesthetics if they were to be used to transport rabbitfish fry. Anaesthetic concentrations suitable for handling and transport were: 10-15 mg L À1 of MS-222, 5-10 mg L À1 of benzocaine, 5 mg L À1 of clove oil and 50-100 lL L À1 of 2-phenoxyethanol. All anaesthetic agents are acceptable for use on S. rivulatus, however, 2-phenoxyethanol, MS-222 and clove oil appear to be more suitable than benzocaine. Further studies need to be conducted on effects of high and low doses of anaesthetic agents on physiology of marbled spinefoot.

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