News features and technical articles about the evolution of aquaculture, one of the world’s fastest growing industries.



Hydrogen sulfide toxic, but manageable

Hydrogen sulfide, which can form in pond bottom sediment, is toxic to aquatic animals because it interferes with reoxidation of cytochrome a3 in respiration. 

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Sediment, water sampling in aquaculture

Simple tools can take water and sediment samples to monitor quality variables in aquaculture ponds. Water surface samples provide limited information, while water column sampling delivers more specific data. 


Sediment microbiology, management

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. 


Organic matter in pond bottom sediment

Organic matter – including fertilizers, unconsumed feed and feces of culture animals – settles to pond bottoms, often with a negative impact on water quality.