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.
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/620702 |
| Date | January 2008 |
| Creators | Holstein, Traci Elizabeth, Holstein, Traci Elizabeth |
| Contributors | Fitzsimmons, Kevin |
| Publisher | The University of Arizona. |
| Source Sets | University of Arizona |
| Language | en_US |
| Detected Language | English |
| Type | text, Thesis-Reproduction (electronic) |
| Rights | Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author. |
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