Aquafeeds
The intrinsic values of better feeds directly affect shrimp growth and performance in a positive way, but because better feeds produce less waste materials in culture systems, they also result in improved water quality that indirectly improves shrimp performance.
Intelligence
When producers and markets are separated by long distances, economic losses can occur. In a review involving tilapia, water quality was adequate in hauling trucks, although pH levels dropped during transport.
Health & Welfare
The authors have achieved good growth using a fishmeal-free diet for the carnivorous marine fish Florida pompano. In studies, they used pompano as a model marine species in a cost/benefit analysis of two extruded diets.
Responsibility
Greater knowledge of fouling organisms and their settlement can help lead to greater effectiveness for cage net-cleaning machines. If cleaning is done regularly at certain times of the year, biofouling may be easier to remove or kept from settling on nets.
Responsibility
Oxidants are used in aquaculture as disinfectants or to enhance water quality. Hydrogen peroxide and sodium carbonate peroxyhydrate can be sources of dissolved oxygen in emergency situations where mechanical aeration is not possible.
Innovation & Investment
Studies on improving water quality in recirculating aquaculture systems has identified ozone as an excellent solution for an optimal water environment.
Responsibility
Biofloc technology offers advantages for the sustainable culture of shrimp and some species of fish.
Health & Welfare
With relatively low use of land and water, intensive aquaculture systems can support much higher production than extensive systems.
Innovation & Investment
Expansion of the Bribie Island Research Centre allows agencies to tackle multidisciplinary research tasks to help the Australian aquaculture industry.
Health & Welfare
Nitrifying bacteria readily form biofilms on surfaces, and colonization by these important bacteria on the interior walls of RAS production units likely provides an additional source of nitrification.
Responsibility
Farm cages should be sited where water quality is good and water velocity is adequate. The size, shape and position of cages should be selected to favor rapid flushing.
Responsibility
A study examined the effects of removing suspended solids using side-stream settling chambers in a superintensive biofloc shrimp system. The chambers reduced nitrate-nitrogen and phosphate concentrations and improved shrimp growth rate and biomass.
Responsibility
Water temperature is a key water quality variable in aquaculture because it influences other variables, defines growing seasons and dictates what species can be grown at a particular location.
Health & Welfare
Due to the inherent complexities of field testing, definitive laboratory-based test methods can better quantify probiotic benefits.
Responsibility
Ponds constructed on sandy or permeable soils are most likely to have high seepage rates. Ponds built in any soil can seep if improperlty constructed.
Responsibility
Mechanical water circulation can prevent stratification and provide more dissolved oxygen near pond bottoms. Strong water mixing can also control algae growth.