Ecosystem Dynamics of a Microbial Biofloc Community Used to Culture Pacific White Shrimp (Litopenaeus vannamei)
Microbial biofloc systems are increasingly important to raising Pacific white shrimp (Litopenaeus vannamei), because they efficiently remove wastes produced by high density cultivation and have the potential to provide supplemental nutrition and oxygen to the shrimp population. Gross primary pr...
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| Language: | en_US |
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The University of Arizona.
2008
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| Online Access: | http://hdl.handle.net/10150/620702 http://arizona.openrepository.com/arizona/handle/10150/620702 |
| Summary: | Microbial biofloc systems are increasingly important to
raising Pacific white shrimp (Litopenaeus vannamei),
because they efficiently remove wastes produced by high
density cultivation and have the potential to provide
supplemental nutrition and oxygen to the shrimp population.
Gross primary productivity (GPP) and community respiration
(RESP) can easily be measured and used to characterize the
dominant processes in a system and how they relate to
shrimp growth, microbial productivity, and survival.
Photoautotrophic, "green water", systems are algal
dominated as evidenced by high daytime GPP. By contrast in
heterotrophic or chemoautotrophic, "brown water", systems,
the respiratory costs exceed the photosynthetic rate even
during daylight hours. RESP can also be used to better
understand the relative contribution of the microbes and
the shrimp to the total oxygen demand of the system.
Finally, clarifiers allow cropping of sludge in hopes of
promoting algal growth and a "green", photoautotrophic
system. |
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