Responsibility
Copper sulfate is widely used as an algicide in ponds and other aquatic systems. Although copper quickly disappears from pond water, cupric ions can be harmful to aquatic animals.
Responsibility
LC50 – the concentration of a substance that is lethal to 50 percent of the organisms exposed to it in a toxicity test – is a useful tool because it can predict the effects of a potential toxin in aquaculture systems.
Responsibility
Water turbidity caused by suspended soil particles decreases productivity in culture ponds. Erosion control is the logical first step in correcting muddy ponds.
Responsibility
Sedimentation increases organic matter concentration in pond bottom soil. Particles originating from mineral soil and organic matter that do not float or dissolve settle to the bottom.
Responsibility
Mechanical pond aerators increase the rate at which oxygen from air enters water by providing a greater surface area to facilitate diffusion.
Responsibility
Feeding allows much greater production of fish and shrimp, but nutrients in feed are not converted completely to fish or shrimp flesh.
Responsibility
Probiotics used as bottom soil and water quality enhancers are primarily cultures of living bacteria, enzyme preparations, or the two combined.
Responsibility
It would be difficult to find a pond aquaculture worker who has not measured Secchi disk visibility or at least seen someone measure it.
Responsibility
Zeolite is used in industry for water softening and as media for molecular sieves but has no real benefit for aquaculture in ammonia removal.
Responsibility
Total suspended solids concentration is time-consuming to measure, but turbidity has been used to estimate TSS concentrations in some types of effluents.
Responsibility
Since the application of mineral salts to correct ionic imbalances has improved survival and production, the practice is becoming increasingly common.
Responsibility
Chemical fertilizers are frequently used in pond aquaculture to stimulate phytoplankton productivity and enhance the availability of natural food organisms.
Responsibility
Organic matter – including fertilizers, unconsumed feed and feces of culture animals – settles to pond bottoms, often with a negative impact on water quality.
Responsibility
The United States Environmental Protection Agency published draft aquaculture effluent guidelines in the Federal Register.
Responsibility
It behooves us to understand land and water use issues and understand the differences between aquaculture and traditional agriculture.
Responsibility
There is increasing interest in low-salinity shrimp culture in inland areas because it is thought that disease control is easier to implement.